Editor.java revision 29cb76849c94bdbd95439e372360a51720c6b067
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.animation.ValueAnimator; 21import android.annotation.IntDef; 22import android.annotation.NonNull; 23import android.annotation.Nullable; 24import android.app.PendingIntent; 25import android.app.PendingIntent.CanceledException; 26import android.app.RemoteAction; 27import android.content.ClipData; 28import android.content.ClipData.Item; 29import android.content.Context; 30import android.content.Intent; 31import android.content.UndoManager; 32import android.content.UndoOperation; 33import android.content.UndoOwner; 34import android.content.pm.PackageManager; 35import android.content.pm.ResolveInfo; 36import android.content.res.TypedArray; 37import android.graphics.Canvas; 38import android.graphics.Color; 39import android.graphics.Matrix; 40import android.graphics.Paint; 41import android.graphics.Path; 42import android.graphics.Point; 43import android.graphics.PointF; 44import android.graphics.Rect; 45import android.graphics.RectF; 46import android.graphics.drawable.ColorDrawable; 47import android.graphics.drawable.Drawable; 48import android.os.Bundle; 49import android.os.LocaleList; 50import android.os.Parcel; 51import android.os.Parcelable; 52import android.os.ParcelableParcel; 53import android.os.SystemClock; 54import android.provider.Settings; 55import android.text.DynamicLayout; 56import android.text.Editable; 57import android.text.InputFilter; 58import android.text.InputType; 59import android.text.Layout; 60import android.text.ParcelableSpan; 61import android.text.Selection; 62import android.text.SpanWatcher; 63import android.text.Spannable; 64import android.text.SpannableStringBuilder; 65import android.text.Spanned; 66import android.text.StaticLayout; 67import android.text.TextUtils; 68import android.text.method.KeyListener; 69import android.text.method.MetaKeyKeyListener; 70import android.text.method.MovementMethod; 71import android.text.method.WordIterator; 72import android.text.style.EasyEditSpan; 73import android.text.style.SuggestionRangeSpan; 74import android.text.style.SuggestionSpan; 75import android.text.style.TextAppearanceSpan; 76import android.text.style.URLSpan; 77import android.util.ArraySet; 78import android.util.DisplayMetrics; 79import android.util.Log; 80import android.util.SparseArray; 81import android.view.ActionMode; 82import android.view.ActionMode.Callback; 83import android.view.ContextMenu; 84import android.view.ContextThemeWrapper; 85import android.view.DisplayListCanvas; 86import android.view.DragAndDropPermissions; 87import android.view.DragEvent; 88import android.view.Gravity; 89import android.view.HapticFeedbackConstants; 90import android.view.InputDevice; 91import android.view.LayoutInflater; 92import android.view.Menu; 93import android.view.MenuItem; 94import android.view.MotionEvent; 95import android.view.RenderNode; 96import android.view.SubMenu; 97import android.view.View; 98import android.view.View.DragShadowBuilder; 99import android.view.View.OnClickListener; 100import android.view.ViewConfiguration; 101import android.view.ViewGroup; 102import android.view.ViewGroup.LayoutParams; 103import android.view.ViewTreeObserver; 104import android.view.WindowManager; 105import android.view.accessibility.AccessibilityNodeInfo; 106import android.view.animation.LinearInterpolator; 107import android.view.inputmethod.CorrectionInfo; 108import android.view.inputmethod.CursorAnchorInfo; 109import android.view.inputmethod.EditorInfo; 110import android.view.inputmethod.ExtractedText; 111import android.view.inputmethod.ExtractedTextRequest; 112import android.view.inputmethod.InputConnection; 113import android.view.inputmethod.InputMethodManager; 114import android.view.textclassifier.TextClassification; 115import android.view.textclassifier.TextClassificationManager; 116import android.widget.AdapterView.OnItemClickListener; 117import android.widget.TextView.Drawables; 118import android.widget.TextView.OnEditorActionListener; 119 120import com.android.internal.annotations.VisibleForTesting; 121import com.android.internal.logging.MetricsLogger; 122import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 123import com.android.internal.util.ArrayUtils; 124import com.android.internal.util.GrowingArrayUtils; 125import com.android.internal.util.Preconditions; 126import com.android.internal.view.FloatingActionMode; 127import com.android.internal.widget.EditableInputConnection; 128 129import java.lang.annotation.Retention; 130import java.lang.annotation.RetentionPolicy; 131import java.text.BreakIterator; 132import java.util.ArrayList; 133import java.util.Arrays; 134import java.util.Comparator; 135import java.util.HashMap; 136import java.util.List; 137import java.util.Map; 138 139/** 140 * Helper class used by TextView to handle editable text views. 141 * 142 * @hide 143 */ 144public class Editor { 145 private static final String TAG = "Editor"; 146 private static final boolean DEBUG_UNDO = false; 147 // Specifies whether to use or not the magnifier when pressing the insertion or selection 148 // handles. 149 private static final boolean FLAG_USE_MAGNIFIER = true; 150 151 static final int BLINK = 500; 152 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 153 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 154 private static final int UNSET_X_VALUE = -1; 155 private static final int UNSET_LINE = -1; 156 // Tag used when the Editor maintains its own separate UndoManager. 157 private static final String UNDO_OWNER_TAG = "Editor"; 158 159 // Ordering constants used to place the Action Mode or context menu items in their menu. 160 private static final int MENU_ITEM_ORDER_ASSIST = 0; 161 private static final int MENU_ITEM_ORDER_UNDO = 2; 162 private static final int MENU_ITEM_ORDER_REDO = 3; 163 private static final int MENU_ITEM_ORDER_CUT = 4; 164 private static final int MENU_ITEM_ORDER_COPY = 5; 165 private static final int MENU_ITEM_ORDER_PASTE = 6; 166 private static final int MENU_ITEM_ORDER_SHARE = 7; 167 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 168 private static final int MENU_ITEM_ORDER_REPLACE = 9; 169 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 170 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 11; 171 private static final int MENU_ITEM_ORDER_SECONDARY_ASSIST_ACTIONS_START = 50; 172 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 173 174 @IntDef({MagnifierHandleTrigger.SELECTION_START, 175 MagnifierHandleTrigger.SELECTION_END, 176 MagnifierHandleTrigger.INSERTION}) 177 @Retention(RetentionPolicy.SOURCE) 178 private @interface MagnifierHandleTrigger { 179 int INSERTION = 0; 180 int SELECTION_START = 1; 181 int SELECTION_END = 2; 182 } 183 184 @IntDef({TextActionMode.SELECTION, TextActionMode.INSERTION, TextActionMode.TEXT_LINK}) 185 @interface TextActionMode { 186 int SELECTION = 0; 187 int INSERTION = 1; 188 int TEXT_LINK = 2; 189 } 190 191 // Each Editor manages its own undo stack. 192 private final UndoManager mUndoManager = new UndoManager(); 193 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 194 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 195 boolean mAllowUndo = true; 196 197 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 198 199 // Cursor Controllers. 200 private InsertionPointCursorController mInsertionPointCursorController; 201 SelectionModifierCursorController mSelectionModifierCursorController; 202 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 203 private ActionMode mTextActionMode; 204 private boolean mInsertionControllerEnabled; 205 private boolean mSelectionControllerEnabled; 206 207 private final boolean mHapticTextHandleEnabled; 208 209 private final MagnifierMotionAnimator mMagnifierAnimator; 210 private final Runnable mUpdateMagnifierRunnable = new Runnable() { 211 @Override 212 public void run() { 213 mMagnifierAnimator.update(); 214 } 215 }; 216 // Update the magnifier contents whenever anything in the view hierarchy is updated. 217 // Note: this only captures UI thread-visible changes, so it's a known issue that an animating 218 // VectorDrawable or Ripple animation will not trigger capture, since they're owned by 219 // RenderThread. 220 private final ViewTreeObserver.OnDrawListener mMagnifierOnDrawListener = 221 new ViewTreeObserver.OnDrawListener() { 222 @Override 223 public void onDraw() { 224 if (mMagnifierAnimator != null) { 225 // Posting the method will ensure that updating the magnifier contents will 226 // happen right after the rendering of the current frame. 227 mTextView.post(mUpdateMagnifierRunnable); 228 } 229 } 230 }; 231 232 // Used to highlight a word when it is corrected by the IME 233 private CorrectionHighlighter mCorrectionHighlighter; 234 235 InputContentType mInputContentType; 236 InputMethodState mInputMethodState; 237 238 private static class TextRenderNode { 239 // Render node has 3 recording states: 240 // 1. Recorded operations are valid. 241 // #needsRecord() returns false, but needsToBeShifted is false. 242 // 2. Recorded operations are not valid, but just the position needed to be updated. 243 // #needsRecord() returns false, but needsToBeShifted is true. 244 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 245 // true. 246 RenderNode renderNode; 247 boolean isDirty; 248 // Becomes true when recorded operations can be reused, but the position has to be updated. 249 boolean needsToBeShifted; 250 public TextRenderNode(String name) { 251 renderNode = RenderNode.create(name, null); 252 isDirty = true; 253 needsToBeShifted = true; 254 } 255 boolean needsRecord() { 256 return isDirty || !renderNode.isValid(); 257 } 258 } 259 private TextRenderNode[] mTextRenderNodes; 260 261 boolean mFrozenWithFocus; 262 boolean mSelectionMoved; 263 boolean mTouchFocusSelected; 264 265 KeyListener mKeyListener; 266 int mInputType = EditorInfo.TYPE_NULL; 267 268 boolean mDiscardNextActionUp; 269 boolean mIgnoreActionUpEvent; 270 271 private long mShowCursor; 272 private boolean mRenderCursorRegardlessTiming; 273 private Blink mBlink; 274 275 boolean mCursorVisible = true; 276 boolean mSelectAllOnFocus; 277 boolean mTextIsSelectable; 278 279 CharSequence mError; 280 boolean mErrorWasChanged; 281 private ErrorPopup mErrorPopup; 282 283 /** 284 * This flag is set if the TextView tries to display an error before it 285 * is attached to the window (so its position is still unknown). 286 * It causes the error to be shown later, when onAttachedToWindow() 287 * is called. 288 */ 289 private boolean mShowErrorAfterAttach; 290 291 boolean mInBatchEditControllers; 292 boolean mShowSoftInputOnFocus = true; 293 private boolean mPreserveSelection; 294 private boolean mRestartActionModeOnNextRefresh; 295 private boolean mRequestingLinkActionMode; 296 297 private SelectionActionModeHelper mSelectionActionModeHelper; 298 299 boolean mIsBeingLongClicked; 300 301 private SuggestionsPopupWindow mSuggestionsPopupWindow; 302 SuggestionRangeSpan mSuggestionRangeSpan; 303 private Runnable mShowSuggestionRunnable; 304 305 Drawable mDrawableForCursor = null; 306 307 private Drawable mSelectHandleLeft; 308 private Drawable mSelectHandleRight; 309 private Drawable mSelectHandleCenter; 310 311 // Global listener that detects changes in the global position of the TextView 312 private PositionListener mPositionListener; 313 314 private float mLastDownPositionX, mLastDownPositionY; 315 private float mLastUpPositionX, mLastUpPositionY; 316 private float mContextMenuAnchorX, mContextMenuAnchorY; 317 Callback mCustomSelectionActionModeCallback; 318 Callback mCustomInsertionActionModeCallback; 319 320 // Set when this TextView gained focus with some text selected. Will start selection mode. 321 boolean mCreatedWithASelection; 322 323 // Indicates the current tap state (first tap, double tap, or triple click). 324 private int mTapState = TAP_STATE_INITIAL; 325 private long mLastTouchUpTime = 0; 326 private static final int TAP_STATE_INITIAL = 0; 327 private static final int TAP_STATE_FIRST_TAP = 1; 328 private static final int TAP_STATE_DOUBLE_TAP = 2; 329 // Only for mouse input. 330 private static final int TAP_STATE_TRIPLE_CLICK = 3; 331 332 // The button state as of the last time #onTouchEvent is called. 333 private int mLastButtonState; 334 335 private Runnable mInsertionActionModeRunnable; 336 337 // The span controller helps monitoring the changes to which the Editor needs to react: 338 // - EasyEditSpans, for which we have some UI to display on attach and on hide 339 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 340 private SpanController mSpanController; 341 342 private WordIterator mWordIterator; 343 SpellChecker mSpellChecker; 344 345 // This word iterator is set with text and used to determine word boundaries 346 // when a user is selecting text. 347 private WordIterator mWordIteratorWithText; 348 // Indicate that the text in the word iterator needs to be updated. 349 private boolean mUpdateWordIteratorText; 350 351 private Rect mTempRect; 352 353 private final TextView mTextView; 354 355 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 356 357 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 358 new CursorAnchorInfoNotifier(); 359 360 private final Runnable mShowFloatingToolbar = new Runnable() { 361 @Override 362 public void run() { 363 if (mTextActionMode != null) { 364 mTextActionMode.hide(0); // hide off. 365 } 366 } 367 }; 368 369 boolean mIsInsertionActionModeStartPending = false; 370 371 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 372 373 Editor(TextView textView) { 374 mTextView = textView; 375 // Synchronize the filter list, which places the undo input filter at the end. 376 mTextView.setFilters(mTextView.getFilters()); 377 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 378 mHapticTextHandleEnabled = mTextView.getContext().getResources().getBoolean( 379 com.android.internal.R.bool.config_enableHapticTextHandle); 380 381 if (FLAG_USE_MAGNIFIER) { 382 mMagnifierAnimator = new MagnifierMotionAnimator(new Magnifier(mTextView)); 383 } 384 } 385 386 ParcelableParcel saveInstanceState() { 387 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 388 Parcel parcel = state.getParcel(); 389 mUndoManager.saveInstanceState(parcel); 390 mUndoInputFilter.saveInstanceState(parcel); 391 return state; 392 } 393 394 void restoreInstanceState(ParcelableParcel state) { 395 Parcel parcel = state.getParcel(); 396 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 397 mUndoInputFilter.restoreInstanceState(parcel); 398 // Re-associate this object as the owner of undo state. 399 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 400 } 401 402 /** 403 * Forgets all undo and redo operations for this Editor. 404 */ 405 void forgetUndoRedo() { 406 UndoOwner[] owners = { mUndoOwner }; 407 mUndoManager.forgetUndos(owners, -1 /* all */); 408 mUndoManager.forgetRedos(owners, -1 /* all */); 409 } 410 411 boolean canUndo() { 412 UndoOwner[] owners = { mUndoOwner }; 413 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 414 } 415 416 boolean canRedo() { 417 UndoOwner[] owners = { mUndoOwner }; 418 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 419 } 420 421 void undo() { 422 if (!mAllowUndo) { 423 return; 424 } 425 UndoOwner[] owners = { mUndoOwner }; 426 mUndoManager.undo(owners, 1); // Undo 1 action. 427 } 428 429 void redo() { 430 if (!mAllowUndo) { 431 return; 432 } 433 UndoOwner[] owners = { mUndoOwner }; 434 mUndoManager.redo(owners, 1); // Redo 1 action. 435 } 436 437 void replace() { 438 if (mSuggestionsPopupWindow == null) { 439 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 440 } 441 hideCursorAndSpanControllers(); 442 mSuggestionsPopupWindow.show(); 443 444 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 445 Selection.setSelection((Spannable) mTextView.getText(), middle); 446 } 447 448 void onAttachedToWindow() { 449 if (mShowErrorAfterAttach) { 450 showError(); 451 mShowErrorAfterAttach = false; 452 } 453 454 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 455 if (observer.isAlive()) { 456 // No need to create the controller. 457 // The get method will add the listener on controller creation. 458 if (mInsertionPointCursorController != null) { 459 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 460 } 461 if (mSelectionModifierCursorController != null) { 462 mSelectionModifierCursorController.resetTouchOffsets(); 463 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 464 } 465 if (FLAG_USE_MAGNIFIER) { 466 observer.addOnDrawListener(mMagnifierOnDrawListener); 467 } 468 } 469 470 updateSpellCheckSpans(0, mTextView.getText().length(), 471 true /* create the spell checker if needed */); 472 473 if (mTextView.hasSelection()) { 474 refreshTextActionMode(); 475 } 476 477 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 478 resumeBlink(); 479 } 480 481 void onDetachedFromWindow() { 482 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 483 484 if (mError != null) { 485 hideError(); 486 } 487 488 suspendBlink(); 489 490 if (mInsertionPointCursorController != null) { 491 mInsertionPointCursorController.onDetached(); 492 } 493 494 if (mSelectionModifierCursorController != null) { 495 mSelectionModifierCursorController.onDetached(); 496 } 497 498 if (mShowSuggestionRunnable != null) { 499 mTextView.removeCallbacks(mShowSuggestionRunnable); 500 } 501 502 // Cancel the single tap delayed runnable. 503 if (mInsertionActionModeRunnable != null) { 504 mTextView.removeCallbacks(mInsertionActionModeRunnable); 505 } 506 507 mTextView.removeCallbacks(mShowFloatingToolbar); 508 509 discardTextDisplayLists(); 510 511 if (mSpellChecker != null) { 512 mSpellChecker.closeSession(); 513 // Forces the creation of a new SpellChecker next time this window is created. 514 // Will handle the cases where the settings has been changed in the meantime. 515 mSpellChecker = null; 516 } 517 518 if (FLAG_USE_MAGNIFIER) { 519 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 520 if (observer.isAlive()) { 521 observer.removeOnDrawListener(mMagnifierOnDrawListener); 522 } 523 } 524 525 hideCursorAndSpanControllers(); 526 stopTextActionModeWithPreservingSelection(); 527 } 528 529 private void discardTextDisplayLists() { 530 if (mTextRenderNodes != null) { 531 for (int i = 0; i < mTextRenderNodes.length; i++) { 532 RenderNode displayList = mTextRenderNodes[i] != null 533 ? mTextRenderNodes[i].renderNode : null; 534 if (displayList != null && displayList.isValid()) { 535 displayList.discardDisplayList(); 536 } 537 } 538 } 539 } 540 541 private void showError() { 542 if (mTextView.getWindowToken() == null) { 543 mShowErrorAfterAttach = true; 544 return; 545 } 546 547 if (mErrorPopup == null) { 548 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 549 final TextView err = (TextView) inflater.inflate( 550 com.android.internal.R.layout.textview_hint, null); 551 552 final float scale = mTextView.getResources().getDisplayMetrics().density; 553 mErrorPopup = 554 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 555 mErrorPopup.setFocusable(false); 556 // The user is entering text, so the input method is needed. We 557 // don't want the popup to be displayed on top of it. 558 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 559 } 560 561 TextView tv = (TextView) mErrorPopup.getContentView(); 562 chooseSize(mErrorPopup, mError, tv); 563 tv.setText(mError); 564 565 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY(), 566 Gravity.TOP | Gravity.LEFT); 567 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 568 } 569 570 public void setError(CharSequence error, Drawable icon) { 571 mError = TextUtils.stringOrSpannedString(error); 572 mErrorWasChanged = true; 573 574 if (mError == null) { 575 setErrorIcon(null); 576 if (mErrorPopup != null) { 577 if (mErrorPopup.isShowing()) { 578 mErrorPopup.dismiss(); 579 } 580 581 mErrorPopup = null; 582 } 583 mShowErrorAfterAttach = false; 584 } else { 585 setErrorIcon(icon); 586 if (mTextView.isFocused()) { 587 showError(); 588 } 589 } 590 } 591 592 private void setErrorIcon(Drawable icon) { 593 Drawables dr = mTextView.mDrawables; 594 if (dr == null) { 595 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 596 } 597 dr.setErrorDrawable(icon, mTextView); 598 599 mTextView.resetResolvedDrawables(); 600 mTextView.invalidate(); 601 mTextView.requestLayout(); 602 } 603 604 private void hideError() { 605 if (mErrorPopup != null) { 606 if (mErrorPopup.isShowing()) { 607 mErrorPopup.dismiss(); 608 } 609 } 610 611 mShowErrorAfterAttach = false; 612 } 613 614 /** 615 * Returns the X offset to make the pointy top of the error point 616 * at the middle of the error icon. 617 */ 618 private int getErrorX() { 619 /* 620 * The "25" is the distance between the point and the right edge 621 * of the background 622 */ 623 final float scale = mTextView.getResources().getDisplayMetrics().density; 624 625 final Drawables dr = mTextView.mDrawables; 626 627 final int layoutDirection = mTextView.getLayoutDirection(); 628 int errorX; 629 int offset; 630 switch (layoutDirection) { 631 default: 632 case View.LAYOUT_DIRECTION_LTR: 633 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 634 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 635 - mTextView.getPaddingRight() + offset; 636 break; 637 case View.LAYOUT_DIRECTION_RTL: 638 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 639 errorX = mTextView.getPaddingLeft() + offset; 640 break; 641 } 642 return errorX; 643 } 644 645 /** 646 * Returns the Y offset to make the pointy top of the error point 647 * at the bottom of the error icon. 648 */ 649 private int getErrorY() { 650 /* 651 * Compound, not extended, because the icon is not clipped 652 * if the text height is smaller. 653 */ 654 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 655 int vspace = mTextView.getBottom() - mTextView.getTop() 656 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 657 658 final Drawables dr = mTextView.mDrawables; 659 660 final int layoutDirection = mTextView.getLayoutDirection(); 661 int height; 662 switch (layoutDirection) { 663 default: 664 case View.LAYOUT_DIRECTION_LTR: 665 height = (dr != null ? dr.mDrawableHeightRight : 0); 666 break; 667 case View.LAYOUT_DIRECTION_RTL: 668 height = (dr != null ? dr.mDrawableHeightLeft : 0); 669 break; 670 } 671 672 int icontop = compoundPaddingTop + (vspace - height) / 2; 673 674 /* 675 * The "2" is the distance between the point and the top edge 676 * of the background. 677 */ 678 final float scale = mTextView.getResources().getDisplayMetrics().density; 679 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 680 } 681 682 void createInputContentTypeIfNeeded() { 683 if (mInputContentType == null) { 684 mInputContentType = new InputContentType(); 685 } 686 } 687 688 void createInputMethodStateIfNeeded() { 689 if (mInputMethodState == null) { 690 mInputMethodState = new InputMethodState(); 691 } 692 } 693 694 private boolean isCursorVisible() { 695 // The default value is true, even when there is no associated Editor 696 return mCursorVisible && mTextView.isTextEditable(); 697 } 698 699 boolean shouldRenderCursor() { 700 if (!isCursorVisible()) { 701 return false; 702 } 703 if (mRenderCursorRegardlessTiming) { 704 return true; 705 } 706 final long showCursorDelta = SystemClock.uptimeMillis() - mShowCursor; 707 return showCursorDelta % (2 * BLINK) < BLINK; 708 } 709 710 void prepareCursorControllers() { 711 boolean windowSupportsHandles = false; 712 713 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 714 if (params instanceof WindowManager.LayoutParams) { 715 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 716 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 717 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 718 } 719 720 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 721 mInsertionControllerEnabled = enabled && isCursorVisible(); 722 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 723 724 if (!mInsertionControllerEnabled) { 725 hideInsertionPointCursorController(); 726 if (mInsertionPointCursorController != null) { 727 mInsertionPointCursorController.onDetached(); 728 mInsertionPointCursorController = null; 729 } 730 } 731 732 if (!mSelectionControllerEnabled) { 733 stopTextActionMode(); 734 if (mSelectionModifierCursorController != null) { 735 mSelectionModifierCursorController.onDetached(); 736 mSelectionModifierCursorController = null; 737 } 738 } 739 } 740 741 void hideInsertionPointCursorController() { 742 if (mInsertionPointCursorController != null) { 743 mInsertionPointCursorController.hide(); 744 } 745 } 746 747 /** 748 * Hides the insertion and span controllers. 749 */ 750 void hideCursorAndSpanControllers() { 751 hideCursorControllers(); 752 hideSpanControllers(); 753 } 754 755 private void hideSpanControllers() { 756 if (mSpanController != null) { 757 mSpanController.hide(); 758 } 759 } 760 761 private void hideCursorControllers() { 762 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 763 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 764 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 765 // to distinguish one from the other. 766 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 767 || !mSuggestionsPopupWindow.isShowingUp())) { 768 // Should be done before hide insertion point controller since it triggers a show of it 769 mSuggestionsPopupWindow.hide(); 770 } 771 hideInsertionPointCursorController(); 772 } 773 774 /** 775 * Create new SpellCheckSpans on the modified region. 776 */ 777 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 778 // Remove spans whose adjacent characters are text not punctuation 779 mTextView.removeAdjacentSuggestionSpans(start); 780 mTextView.removeAdjacentSuggestionSpans(end); 781 782 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 783 && !(mTextView.isInExtractedMode())) { 784 if (mSpellChecker == null && createSpellChecker) { 785 mSpellChecker = new SpellChecker(mTextView); 786 } 787 if (mSpellChecker != null) { 788 mSpellChecker.spellCheck(start, end); 789 } 790 } 791 } 792 793 void onScreenStateChanged(int screenState) { 794 switch (screenState) { 795 case View.SCREEN_STATE_ON: 796 resumeBlink(); 797 break; 798 case View.SCREEN_STATE_OFF: 799 suspendBlink(); 800 break; 801 } 802 } 803 804 private void suspendBlink() { 805 if (mBlink != null) { 806 mBlink.cancel(); 807 } 808 } 809 810 private void resumeBlink() { 811 if (mBlink != null) { 812 mBlink.uncancel(); 813 makeBlink(); 814 } 815 } 816 817 void adjustInputType(boolean password, boolean passwordInputType, 818 boolean webPasswordInputType, boolean numberPasswordInputType) { 819 // mInputType has been set from inputType, possibly modified by mInputMethod. 820 // Specialize mInputType to [web]password if we have a text class and the original input 821 // type was a password. 822 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 823 if (password || passwordInputType) { 824 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 825 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 826 } 827 if (webPasswordInputType) { 828 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 829 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 830 } 831 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 832 if (numberPasswordInputType) { 833 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 834 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 835 } 836 } 837 } 838 839 private void chooseSize(@NonNull PopupWindow pop, @NonNull CharSequence text, 840 @NonNull TextView tv) { 841 final int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 842 final int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 843 844 final int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 845 com.android.internal.R.dimen.textview_error_popup_default_width); 846 final StaticLayout l = StaticLayout.Builder.obtain(text, 0, text.length(), tv.getPaint(), 847 defaultWidthInPixels) 848 .setUseLineSpacingFromFallbacks(tv.mUseFallbackLineSpacing) 849 .build(); 850 851 float max = 0; 852 for (int i = 0; i < l.getLineCount(); i++) { 853 max = Math.max(max, l.getLineWidth(i)); 854 } 855 856 /* 857 * Now set the popup size to be big enough for the text plus the border capped 858 * to DEFAULT_MAX_POPUP_WIDTH 859 */ 860 pop.setWidth(wid + (int) Math.ceil(max)); 861 pop.setHeight(ht + l.getHeight()); 862 } 863 864 void setFrame() { 865 if (mErrorPopup != null) { 866 TextView tv = (TextView) mErrorPopup.getContentView(); 867 chooseSize(mErrorPopup, mError, tv); 868 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 869 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 870 } 871 } 872 873 private int getWordStart(int offset) { 874 // FIXME - For this and similar methods we're not doing anything to check if there's 875 // a LocaleSpan in the text, this may be something we should try handling or checking for. 876 int retOffset = getWordIteratorWithText().prevBoundary(offset); 877 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 878 // On punctuation boundary or within group of punctuation, find punctuation start. 879 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 880 } else { 881 // Not on a punctuation boundary, find the word start. 882 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 883 } 884 if (retOffset == BreakIterator.DONE) { 885 return offset; 886 } 887 return retOffset; 888 } 889 890 private int getWordEnd(int offset) { 891 int retOffset = getWordIteratorWithText().nextBoundary(offset); 892 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 893 // On punctuation boundary or within group of punctuation, find punctuation end. 894 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 895 } else { 896 // Not on a punctuation boundary, find the word end. 897 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 898 } 899 if (retOffset == BreakIterator.DONE) { 900 return offset; 901 } 902 return retOffset; 903 } 904 905 private boolean needsToSelectAllToSelectWordOrParagraph() { 906 if (mTextView.hasPasswordTransformationMethod()) { 907 // Always select all on a password field. 908 // Cut/copy menu entries are not available for passwords, but being able to select all 909 // is however useful to delete or paste to replace the entire content. 910 return true; 911 } 912 913 int inputType = mTextView.getInputType(); 914 int klass = inputType & InputType.TYPE_MASK_CLASS; 915 int variation = inputType & InputType.TYPE_MASK_VARIATION; 916 917 // Specific text field types: select the entire text for these 918 if (klass == InputType.TYPE_CLASS_NUMBER 919 || klass == InputType.TYPE_CLASS_PHONE 920 || klass == InputType.TYPE_CLASS_DATETIME 921 || variation == InputType.TYPE_TEXT_VARIATION_URI 922 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 923 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 924 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 925 return true; 926 } 927 return false; 928 } 929 930 /** 931 * Adjusts selection to the word under last touch offset. Return true if the operation was 932 * successfully performed. 933 */ 934 boolean selectCurrentWord() { 935 if (!mTextView.canSelectText()) { 936 return false; 937 } 938 939 if (needsToSelectAllToSelectWordOrParagraph()) { 940 return mTextView.selectAllText(); 941 } 942 943 long lastTouchOffsets = getLastTouchOffsets(); 944 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 945 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 946 947 // Safety check in case standard touch event handling has been bypassed 948 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 949 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 950 951 int selectionStart, selectionEnd; 952 953 // If a URLSpan (web address, email, phone...) is found at that position, select it. 954 URLSpan[] urlSpans = 955 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 956 if (urlSpans.length >= 1) { 957 URLSpan urlSpan = urlSpans[0]; 958 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 959 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 960 } else { 961 // FIXME - We should check if there's a LocaleSpan in the text, this may be 962 // something we should try handling or checking for. 963 final WordIterator wordIterator = getWordIterator(); 964 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 965 966 selectionStart = wordIterator.getBeginning(minOffset); 967 selectionEnd = wordIterator.getEnd(maxOffset); 968 969 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 970 || selectionStart == selectionEnd) { 971 // Possible when the word iterator does not properly handle the text's language 972 long range = getCharClusterRange(minOffset); 973 selectionStart = TextUtils.unpackRangeStartFromLong(range); 974 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 975 } 976 } 977 978 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 979 return selectionEnd > selectionStart; 980 } 981 982 /** 983 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 984 * successfully performed. 985 */ 986 private boolean selectCurrentParagraph() { 987 if (!mTextView.canSelectText()) { 988 return false; 989 } 990 991 if (needsToSelectAllToSelectWordOrParagraph()) { 992 return mTextView.selectAllText(); 993 } 994 995 long lastTouchOffsets = getLastTouchOffsets(); 996 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 997 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 998 999 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 1000 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 1001 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 1002 if (start < end) { 1003 Selection.setSelection((Spannable) mTextView.getText(), start, end); 1004 return true; 1005 } 1006 return false; 1007 } 1008 1009 /** 1010 * Get the minimum range of paragraphs that contains startOffset and endOffset. 1011 */ 1012 private long getParagraphsRange(int startOffset, int endOffset) { 1013 final Layout layout = mTextView.getLayout(); 1014 if (layout == null) { 1015 return TextUtils.packRangeInLong(-1, -1); 1016 } 1017 final CharSequence text = mTextView.getText(); 1018 int minLine = layout.getLineForOffset(startOffset); 1019 // Search paragraph start. 1020 while (minLine > 0) { 1021 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 1022 if (text.charAt(prevLineEndOffset - 1) == '\n') { 1023 break; 1024 } 1025 minLine--; 1026 } 1027 int maxLine = layout.getLineForOffset(endOffset); 1028 // Search paragraph end. 1029 while (maxLine < layout.getLineCount() - 1) { 1030 final int lineEndOffset = layout.getLineEnd(maxLine); 1031 if (text.charAt(lineEndOffset - 1) == '\n') { 1032 break; 1033 } 1034 maxLine++; 1035 } 1036 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 1037 } 1038 1039 void onLocaleChanged() { 1040 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 1041 // proper new locale 1042 mWordIterator = null; 1043 mWordIteratorWithText = null; 1044 } 1045 1046 public WordIterator getWordIterator() { 1047 if (mWordIterator == null) { 1048 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 1049 } 1050 return mWordIterator; 1051 } 1052 1053 private WordIterator getWordIteratorWithText() { 1054 if (mWordIteratorWithText == null) { 1055 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 1056 mUpdateWordIteratorText = true; 1057 } 1058 if (mUpdateWordIteratorText) { 1059 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 1060 // to the user's selection is needed. A possible solution would be to 1061 // copy some number N of characters near the selection and then when the 1062 // user approaches N then we'd do another copy of the next N characters. 1063 CharSequence text = mTextView.getText(); 1064 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 1065 mUpdateWordIteratorText = false; 1066 } 1067 return mWordIteratorWithText; 1068 } 1069 1070 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 1071 final Layout layout = mTextView.getLayout(); 1072 if (layout == null) return offset; 1073 return findAfterGivenOffset == layout.isRtlCharAt(offset) 1074 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 1075 } 1076 1077 private long getCharClusterRange(int offset) { 1078 final int textLength = mTextView.getText().length(); 1079 if (offset < textLength) { 1080 final int clusterEndOffset = getNextCursorOffset(offset, true); 1081 return TextUtils.packRangeInLong( 1082 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 1083 } 1084 if (offset - 1 >= 0) { 1085 final int clusterStartOffset = getNextCursorOffset(offset, false); 1086 return TextUtils.packRangeInLong(clusterStartOffset, 1087 getNextCursorOffset(clusterStartOffset, true)); 1088 } 1089 return TextUtils.packRangeInLong(offset, offset); 1090 } 1091 1092 private boolean touchPositionIsInSelection() { 1093 int selectionStart = mTextView.getSelectionStart(); 1094 int selectionEnd = mTextView.getSelectionEnd(); 1095 1096 if (selectionStart == selectionEnd) { 1097 return false; 1098 } 1099 1100 if (selectionStart > selectionEnd) { 1101 int tmp = selectionStart; 1102 selectionStart = selectionEnd; 1103 selectionEnd = tmp; 1104 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1105 } 1106 1107 SelectionModifierCursorController selectionController = getSelectionController(); 1108 int minOffset = selectionController.getMinTouchOffset(); 1109 int maxOffset = selectionController.getMaxTouchOffset(); 1110 1111 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1112 } 1113 1114 private PositionListener getPositionListener() { 1115 if (mPositionListener == null) { 1116 mPositionListener = new PositionListener(); 1117 } 1118 return mPositionListener; 1119 } 1120 1121 private interface TextViewPositionListener { 1122 public void updatePosition(int parentPositionX, int parentPositionY, 1123 boolean parentPositionChanged, boolean parentScrolled); 1124 } 1125 1126 private boolean isOffsetVisible(int offset) { 1127 Layout layout = mTextView.getLayout(); 1128 if (layout == null) return false; 1129 1130 final int line = layout.getLineForOffset(offset); 1131 final int lineBottom = layout.getLineBottom(line); 1132 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1133 return mTextView.isPositionVisible( 1134 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1135 lineBottom + mTextView.viewportToContentVerticalOffset()); 1136 } 1137 1138 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1139 * in the view. Returns false when the position is in the empty space of left/right of text. 1140 */ 1141 private boolean isPositionOnText(float x, float y) { 1142 Layout layout = mTextView.getLayout(); 1143 if (layout == null) return false; 1144 1145 final int line = mTextView.getLineAtCoordinate(y); 1146 x = mTextView.convertToLocalHorizontalCoordinate(x); 1147 1148 if (x < layout.getLineLeft(line)) return false; 1149 if (x > layout.getLineRight(line)) return false; 1150 return true; 1151 } 1152 1153 private void startDragAndDrop() { 1154 getSelectionActionModeHelper().onSelectionDrag(); 1155 1156 // TODO: Fix drag and drop in full screen extracted mode. 1157 if (mTextView.isInExtractedMode()) { 1158 return; 1159 } 1160 final int start = mTextView.getSelectionStart(); 1161 final int end = mTextView.getSelectionEnd(); 1162 CharSequence selectedText = mTextView.getTransformedText(start, end); 1163 ClipData data = ClipData.newPlainText(null, selectedText); 1164 DragLocalState localState = new DragLocalState(mTextView, start, end); 1165 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1166 View.DRAG_FLAG_GLOBAL); 1167 stopTextActionMode(); 1168 if (hasSelectionController()) { 1169 getSelectionController().resetTouchOffsets(); 1170 } 1171 } 1172 1173 public boolean performLongClick(boolean handled) { 1174 // Long press in empty space moves cursor and starts the insertion action mode. 1175 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1176 && mInsertionControllerEnabled) { 1177 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1178 mLastDownPositionY); 1179 Selection.setSelection((Spannable) mTextView.getText(), offset); 1180 getInsertionController().show(); 1181 mIsInsertionActionModeStartPending = true; 1182 handled = true; 1183 MetricsLogger.action( 1184 mTextView.getContext(), 1185 MetricsEvent.TEXT_LONGPRESS, 1186 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1187 } 1188 1189 if (!handled && mTextActionMode != null) { 1190 if (touchPositionIsInSelection()) { 1191 startDragAndDrop(); 1192 MetricsLogger.action( 1193 mTextView.getContext(), 1194 MetricsEvent.TEXT_LONGPRESS, 1195 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1196 } else { 1197 stopTextActionMode(); 1198 selectCurrentWordAndStartDrag(); 1199 MetricsLogger.action( 1200 mTextView.getContext(), 1201 MetricsEvent.TEXT_LONGPRESS, 1202 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1203 } 1204 handled = true; 1205 } 1206 1207 // Start a new selection 1208 if (!handled) { 1209 handled = selectCurrentWordAndStartDrag(); 1210 if (handled) { 1211 MetricsLogger.action( 1212 mTextView.getContext(), 1213 MetricsEvent.TEXT_LONGPRESS, 1214 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1215 } 1216 } 1217 1218 return handled; 1219 } 1220 1221 float getLastUpPositionX() { 1222 return mLastUpPositionX; 1223 } 1224 1225 float getLastUpPositionY() { 1226 return mLastUpPositionY; 1227 } 1228 1229 private long getLastTouchOffsets() { 1230 SelectionModifierCursorController selectionController = getSelectionController(); 1231 final int minOffset = selectionController.getMinTouchOffset(); 1232 final int maxOffset = selectionController.getMaxTouchOffset(); 1233 return TextUtils.packRangeInLong(minOffset, maxOffset); 1234 } 1235 1236 void onFocusChanged(boolean focused, int direction) { 1237 mShowCursor = SystemClock.uptimeMillis(); 1238 ensureEndedBatchEdit(); 1239 1240 if (focused) { 1241 int selStart = mTextView.getSelectionStart(); 1242 int selEnd = mTextView.getSelectionEnd(); 1243 1244 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1245 // mode for these, unless there was a specific selection already started. 1246 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1247 && selEnd == mTextView.getText().length(); 1248 1249 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1250 && !isFocusHighlighted; 1251 1252 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1253 // If a tap was used to give focus to that view, move cursor at tap position. 1254 // Has to be done before onTakeFocus, which can be overloaded. 1255 final int lastTapPosition = getLastTapPosition(); 1256 if (lastTapPosition >= 0) { 1257 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1258 } 1259 1260 // Note this may have to be moved out of the Editor class 1261 MovementMethod mMovement = mTextView.getMovementMethod(); 1262 if (mMovement != null) { 1263 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1264 } 1265 1266 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1267 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1268 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1269 // This special case ensure that we keep current selection in that case. 1270 // It would be better to know why the DecorView does not have focus at that time. 1271 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1272 && selStart >= 0 && selEnd >= 0) { 1273 /* 1274 * Someone intentionally set the selection, so let them 1275 * do whatever it is that they wanted to do instead of 1276 * the default on-focus behavior. We reset the selection 1277 * here instead of just skipping the onTakeFocus() call 1278 * because some movement methods do something other than 1279 * just setting the selection in theirs and we still 1280 * need to go through that path. 1281 */ 1282 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1283 } 1284 1285 if (mSelectAllOnFocus) { 1286 mTextView.selectAllText(); 1287 } 1288 1289 mTouchFocusSelected = true; 1290 } 1291 1292 mFrozenWithFocus = false; 1293 mSelectionMoved = false; 1294 1295 if (mError != null) { 1296 showError(); 1297 } 1298 1299 makeBlink(); 1300 } else { 1301 if (mError != null) { 1302 hideError(); 1303 } 1304 // Don't leave us in the middle of a batch edit. 1305 mTextView.onEndBatchEdit(); 1306 1307 if (mTextView.isInExtractedMode()) { 1308 hideCursorAndSpanControllers(); 1309 stopTextActionModeWithPreservingSelection(); 1310 } else { 1311 hideCursorAndSpanControllers(); 1312 if (mTextView.isTemporarilyDetached()) { 1313 stopTextActionModeWithPreservingSelection(); 1314 } else { 1315 stopTextActionMode(); 1316 } 1317 downgradeEasyCorrectionSpans(); 1318 } 1319 // No need to create the controller 1320 if (mSelectionModifierCursorController != null) { 1321 mSelectionModifierCursorController.resetTouchOffsets(); 1322 } 1323 1324 ensureNoSelectionIfNonSelectable(); 1325 } 1326 } 1327 1328 private void ensureNoSelectionIfNonSelectable() { 1329 // This could be the case if a TextLink has been tapped. 1330 if (!mTextView.textCanBeSelected() && mTextView.hasSelection()) { 1331 Selection.setSelection((Spannable) mTextView.getText(), 1332 mTextView.length(), mTextView.length()); 1333 } 1334 } 1335 1336 /** 1337 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1338 * span. 1339 */ 1340 private void downgradeEasyCorrectionSpans() { 1341 CharSequence text = mTextView.getText(); 1342 if (text instanceof Spannable) { 1343 Spannable spannable = (Spannable) text; 1344 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1345 spannable.length(), SuggestionSpan.class); 1346 for (int i = 0; i < suggestionSpans.length; i++) { 1347 int flags = suggestionSpans[i].getFlags(); 1348 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1349 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1350 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1351 suggestionSpans[i].setFlags(flags); 1352 } 1353 } 1354 } 1355 } 1356 1357 void sendOnTextChanged(int start, int before, int after) { 1358 getSelectionActionModeHelper().onTextChanged(start, start + before); 1359 updateSpellCheckSpans(start, start + after, false); 1360 1361 // Flip flag to indicate the word iterator needs to have the text reset. 1362 mUpdateWordIteratorText = true; 1363 1364 // Hide the controllers as soon as text is modified (typing, procedural...) 1365 // We do not hide the span controllers, since they can be added when a new text is 1366 // inserted into the text view (voice IME). 1367 hideCursorControllers(); 1368 // Reset drag accelerator. 1369 if (mSelectionModifierCursorController != null) { 1370 mSelectionModifierCursorController.resetTouchOffsets(); 1371 } 1372 stopTextActionMode(); 1373 } 1374 1375 private int getLastTapPosition() { 1376 // No need to create the controller at that point, no last tap position saved 1377 if (mSelectionModifierCursorController != null) { 1378 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1379 if (lastTapPosition >= 0) { 1380 // Safety check, should not be possible. 1381 if (lastTapPosition > mTextView.getText().length()) { 1382 lastTapPosition = mTextView.getText().length(); 1383 } 1384 return lastTapPosition; 1385 } 1386 } 1387 1388 return -1; 1389 } 1390 1391 void onWindowFocusChanged(boolean hasWindowFocus) { 1392 if (hasWindowFocus) { 1393 if (mBlink != null) { 1394 mBlink.uncancel(); 1395 makeBlink(); 1396 } 1397 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1398 refreshTextActionMode(); 1399 } 1400 } else { 1401 if (mBlink != null) { 1402 mBlink.cancel(); 1403 } 1404 if (mInputContentType != null) { 1405 mInputContentType.enterDown = false; 1406 } 1407 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1408 hideCursorAndSpanControllers(); 1409 stopTextActionModeWithPreservingSelection(); 1410 if (mSuggestionsPopupWindow != null) { 1411 mSuggestionsPopupWindow.onParentLostFocus(); 1412 } 1413 1414 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1415 ensureEndedBatchEdit(); 1416 1417 ensureNoSelectionIfNonSelectable(); 1418 } 1419 } 1420 1421 private void updateTapState(MotionEvent event) { 1422 final int action = event.getActionMasked(); 1423 if (action == MotionEvent.ACTION_DOWN) { 1424 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1425 // Detect double tap and triple click. 1426 if (((mTapState == TAP_STATE_FIRST_TAP) 1427 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1428 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1429 <= ViewConfiguration.getDoubleTapTimeout()) { 1430 if (mTapState == TAP_STATE_FIRST_TAP) { 1431 mTapState = TAP_STATE_DOUBLE_TAP; 1432 } else { 1433 mTapState = TAP_STATE_TRIPLE_CLICK; 1434 } 1435 } else { 1436 mTapState = TAP_STATE_FIRST_TAP; 1437 } 1438 } 1439 if (action == MotionEvent.ACTION_UP) { 1440 mLastTouchUpTime = SystemClock.uptimeMillis(); 1441 } 1442 } 1443 1444 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1445 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1446 return false; 1447 } 1448 final boolean primaryButtonStateChanged = 1449 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1450 final int action = event.getActionMasked(); 1451 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1452 && !primaryButtonStateChanged) { 1453 return true; 1454 } 1455 if (action == MotionEvent.ACTION_MOVE 1456 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1457 return true; 1458 } 1459 return false; 1460 } 1461 1462 void onTouchEvent(MotionEvent event) { 1463 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1464 mLastButtonState = event.getButtonState(); 1465 if (filterOutEvent) { 1466 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1467 mDiscardNextActionUp = true; 1468 } 1469 return; 1470 } 1471 updateTapState(event); 1472 updateFloatingToolbarVisibility(event); 1473 1474 if (hasSelectionController()) { 1475 getSelectionController().onTouchEvent(event); 1476 } 1477 1478 if (mShowSuggestionRunnable != null) { 1479 mTextView.removeCallbacks(mShowSuggestionRunnable); 1480 mShowSuggestionRunnable = null; 1481 } 1482 1483 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1484 mLastUpPositionX = event.getX(); 1485 mLastUpPositionY = event.getY(); 1486 } 1487 1488 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1489 mLastDownPositionX = event.getX(); 1490 mLastDownPositionY = event.getY(); 1491 1492 // Reset this state; it will be re-set if super.onTouchEvent 1493 // causes focus to move to the view. 1494 mTouchFocusSelected = false; 1495 mIgnoreActionUpEvent = false; 1496 } 1497 } 1498 1499 private void updateFloatingToolbarVisibility(MotionEvent event) { 1500 if (mTextActionMode != null) { 1501 switch (event.getActionMasked()) { 1502 case MotionEvent.ACTION_MOVE: 1503 hideFloatingToolbar(ActionMode.DEFAULT_HIDE_DURATION); 1504 break; 1505 case MotionEvent.ACTION_UP: // fall through 1506 case MotionEvent.ACTION_CANCEL: 1507 showFloatingToolbar(); 1508 } 1509 } 1510 } 1511 1512 void hideFloatingToolbar(int duration) { 1513 if (mTextActionMode != null) { 1514 mTextView.removeCallbacks(mShowFloatingToolbar); 1515 mTextActionMode.hide(duration); 1516 } 1517 } 1518 1519 private void showFloatingToolbar() { 1520 if (mTextActionMode != null) { 1521 // Delay "show" so it doesn't interfere with click confirmations 1522 // or double-clicks that could "dismiss" the floating toolbar. 1523 int delay = ViewConfiguration.getDoubleTapTimeout(); 1524 mTextView.postDelayed(mShowFloatingToolbar, delay); 1525 1526 // This classifies the text and most likely returns before the toolbar is actually 1527 // shown. If not, it will update the toolbar with the result when classification 1528 // returns. We would rather not wait for a long running classification process. 1529 invalidateActionModeAsync(); 1530 } 1531 } 1532 1533 public void beginBatchEdit() { 1534 mInBatchEditControllers = true; 1535 final InputMethodState ims = mInputMethodState; 1536 if (ims != null) { 1537 int nesting = ++ims.mBatchEditNesting; 1538 if (nesting == 1) { 1539 ims.mCursorChanged = false; 1540 ims.mChangedDelta = 0; 1541 if (ims.mContentChanged) { 1542 // We already have a pending change from somewhere else, 1543 // so turn this into a full update. 1544 ims.mChangedStart = 0; 1545 ims.mChangedEnd = mTextView.getText().length(); 1546 } else { 1547 ims.mChangedStart = EXTRACT_UNKNOWN; 1548 ims.mChangedEnd = EXTRACT_UNKNOWN; 1549 ims.mContentChanged = false; 1550 } 1551 mUndoInputFilter.beginBatchEdit(); 1552 mTextView.onBeginBatchEdit(); 1553 } 1554 } 1555 } 1556 1557 public void endBatchEdit() { 1558 mInBatchEditControllers = false; 1559 final InputMethodState ims = mInputMethodState; 1560 if (ims != null) { 1561 int nesting = --ims.mBatchEditNesting; 1562 if (nesting == 0) { 1563 finishBatchEdit(ims); 1564 } 1565 } 1566 } 1567 1568 void ensureEndedBatchEdit() { 1569 final InputMethodState ims = mInputMethodState; 1570 if (ims != null && ims.mBatchEditNesting != 0) { 1571 ims.mBatchEditNesting = 0; 1572 finishBatchEdit(ims); 1573 } 1574 } 1575 1576 void finishBatchEdit(final InputMethodState ims) { 1577 mTextView.onEndBatchEdit(); 1578 mUndoInputFilter.endBatchEdit(); 1579 1580 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1581 mTextView.updateAfterEdit(); 1582 reportExtractedText(); 1583 } else if (ims.mCursorChanged) { 1584 // Cheesy way to get us to report the current cursor location. 1585 mTextView.invalidateCursor(); 1586 } 1587 // sendUpdateSelection knows to avoid sending if the selection did 1588 // not actually change. 1589 sendUpdateSelection(); 1590 1591 // Show drag handles if they were blocked by batch edit mode. 1592 if (mTextActionMode != null) { 1593 final CursorController cursorController = mTextView.hasSelection() 1594 ? getSelectionController() : getInsertionController(); 1595 if (cursorController != null && !cursorController.isActive() 1596 && !cursorController.isCursorBeingModified()) { 1597 cursorController.show(); 1598 } 1599 } 1600 } 1601 1602 static final int EXTRACT_NOTHING = -2; 1603 static final int EXTRACT_UNKNOWN = -1; 1604 1605 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1606 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1607 EXTRACT_UNKNOWN, outText); 1608 } 1609 1610 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1611 int partialStartOffset, int partialEndOffset, int delta, 1612 @Nullable ExtractedText outText) { 1613 if (request == null || outText == null) { 1614 return false; 1615 } 1616 1617 final CharSequence content = mTextView.getText(); 1618 if (content == null) { 1619 return false; 1620 } 1621 1622 if (partialStartOffset != EXTRACT_NOTHING) { 1623 final int N = content.length(); 1624 if (partialStartOffset < 0) { 1625 outText.partialStartOffset = outText.partialEndOffset = -1; 1626 partialStartOffset = 0; 1627 partialEndOffset = N; 1628 } else { 1629 // Now use the delta to determine the actual amount of text 1630 // we need. 1631 partialEndOffset += delta; 1632 // Adjust offsets to ensure we contain full spans. 1633 if (content instanceof Spanned) { 1634 Spanned spanned = (Spanned) content; 1635 Object[] spans = spanned.getSpans(partialStartOffset, 1636 partialEndOffset, ParcelableSpan.class); 1637 int i = spans.length; 1638 while (i > 0) { 1639 i--; 1640 int j = spanned.getSpanStart(spans[i]); 1641 if (j < partialStartOffset) partialStartOffset = j; 1642 j = spanned.getSpanEnd(spans[i]); 1643 if (j > partialEndOffset) partialEndOffset = j; 1644 } 1645 } 1646 outText.partialStartOffset = partialStartOffset; 1647 outText.partialEndOffset = partialEndOffset - delta; 1648 1649 if (partialStartOffset > N) { 1650 partialStartOffset = N; 1651 } else if (partialStartOffset < 0) { 1652 partialStartOffset = 0; 1653 } 1654 if (partialEndOffset > N) { 1655 partialEndOffset = N; 1656 } else if (partialEndOffset < 0) { 1657 partialEndOffset = 0; 1658 } 1659 } 1660 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1661 outText.text = content.subSequence(partialStartOffset, 1662 partialEndOffset); 1663 } else { 1664 outText.text = TextUtils.substring(content, partialStartOffset, 1665 partialEndOffset); 1666 } 1667 } else { 1668 outText.partialStartOffset = 0; 1669 outText.partialEndOffset = 0; 1670 outText.text = ""; 1671 } 1672 outText.flags = 0; 1673 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1674 outText.flags |= ExtractedText.FLAG_SELECTING; 1675 } 1676 if (mTextView.isSingleLine()) { 1677 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1678 } 1679 outText.startOffset = 0; 1680 outText.selectionStart = mTextView.getSelectionStart(); 1681 outText.selectionEnd = mTextView.getSelectionEnd(); 1682 outText.hint = mTextView.getHint(); 1683 return true; 1684 } 1685 1686 boolean reportExtractedText() { 1687 final Editor.InputMethodState ims = mInputMethodState; 1688 if (ims == null) { 1689 return false; 1690 } 1691 ims.mSelectionModeChanged = false; 1692 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1693 if (req == null) { 1694 return false; 1695 } 1696 final InputMethodManager imm = InputMethodManager.peekInstance(); 1697 if (imm == null) { 1698 return false; 1699 } 1700 if (TextView.DEBUG_EXTRACT) { 1701 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1702 + ims.mChangedStart 1703 + " end=" + ims.mChangedEnd 1704 + " delta=" + ims.mChangedDelta); 1705 } 1706 if (ims.mChangedStart < 0 && !ims.mContentChanged) { 1707 ims.mChangedStart = EXTRACT_NOTHING; 1708 } 1709 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1710 ims.mChangedDelta, ims.mExtractedText)) { 1711 if (TextView.DEBUG_EXTRACT) { 1712 Log.v(TextView.LOG_TAG, 1713 "Reporting extracted start=" 1714 + ims.mExtractedText.partialStartOffset 1715 + " end=" + ims.mExtractedText.partialEndOffset 1716 + ": " + ims.mExtractedText.text); 1717 } 1718 1719 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1720 ims.mChangedStart = EXTRACT_UNKNOWN; 1721 ims.mChangedEnd = EXTRACT_UNKNOWN; 1722 ims.mChangedDelta = 0; 1723 ims.mContentChanged = false; 1724 return true; 1725 } 1726 return false; 1727 } 1728 1729 private void sendUpdateSelection() { 1730 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1731 final InputMethodManager imm = InputMethodManager.peekInstance(); 1732 if (null != imm) { 1733 final int selectionStart = mTextView.getSelectionStart(); 1734 final int selectionEnd = mTextView.getSelectionEnd(); 1735 int candStart = -1; 1736 int candEnd = -1; 1737 if (mTextView.getText() instanceof Spannable) { 1738 final Spannable sp = (Spannable) mTextView.getText(); 1739 candStart = EditableInputConnection.getComposingSpanStart(sp); 1740 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1741 } 1742 // InputMethodManager#updateSelection skips sending the message if 1743 // none of the parameters have changed since the last time we called it. 1744 imm.updateSelection(mTextView, 1745 selectionStart, selectionEnd, candStart, candEnd); 1746 } 1747 } 1748 } 1749 1750 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1751 int cursorOffsetVertical) { 1752 final int selectionStart = mTextView.getSelectionStart(); 1753 final int selectionEnd = mTextView.getSelectionEnd(); 1754 1755 final InputMethodState ims = mInputMethodState; 1756 if (ims != null && ims.mBatchEditNesting == 0) { 1757 InputMethodManager imm = InputMethodManager.peekInstance(); 1758 if (imm != null) { 1759 if (imm.isActive(mTextView)) { 1760 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1761 // We are in extract mode and the content has changed 1762 // in some way... just report complete new text to the 1763 // input method. 1764 reportExtractedText(); 1765 } 1766 } 1767 } 1768 } 1769 1770 if (mCorrectionHighlighter != null) { 1771 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1772 } 1773 1774 if (highlight != null && selectionStart == selectionEnd && mDrawableForCursor != null) { 1775 drawCursor(canvas, cursorOffsetVertical); 1776 // Rely on the drawable entirely, do not draw the cursor line. 1777 // Has to be done after the IMM related code above which relies on the highlight. 1778 highlight = null; 1779 } 1780 1781 if (mSelectionActionModeHelper != null) { 1782 mSelectionActionModeHelper.onDraw(canvas); 1783 if (mSelectionActionModeHelper.isDrawingHighlight()) { 1784 highlight = null; 1785 } 1786 } 1787 1788 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1789 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1790 cursorOffsetVertical); 1791 } else { 1792 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1793 } 1794 } 1795 1796 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1797 Paint highlightPaint, int cursorOffsetVertical) { 1798 final long lineRange = layout.getLineRangeForDraw(canvas); 1799 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1800 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1801 if (lastLine < 0) return; 1802 1803 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1804 firstLine, lastLine); 1805 1806 if (layout instanceof DynamicLayout) { 1807 if (mTextRenderNodes == null) { 1808 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1809 } 1810 1811 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1812 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1813 int[] blockIndices = dynamicLayout.getBlockIndices(); 1814 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1815 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1816 1817 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1818 if (blockSet != null) { 1819 for (int i = 0; i < blockSet.size(); i++) { 1820 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1821 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1822 && mTextRenderNodes[blockIndex] != null) { 1823 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1824 } 1825 } 1826 } 1827 1828 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1829 if (startBlock < 0) { 1830 startBlock = -(startBlock + 1); 1831 } 1832 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1833 1834 int startIndexToFindAvailableRenderNode = 0; 1835 int lastIndex = numberOfBlocks; 1836 1837 for (int i = startBlock; i < numberOfBlocks; i++) { 1838 final int blockIndex = blockIndices[i]; 1839 if (i >= indexFirstChangedBlock 1840 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1841 && mTextRenderNodes[blockIndex] != null) { 1842 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1843 } 1844 if (blockEndLines[i] < firstLine) { 1845 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1846 // be redrawn after they get scrolled into drawing range. 1847 continue; 1848 } 1849 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1850 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1851 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1852 if (blockEndLines[i] >= lastLine) { 1853 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1854 break; 1855 } 1856 } 1857 if (blockSet != null) { 1858 for (int i = 0; i < blockSet.size(); i++) { 1859 final int block = blockSet.valueAt(i); 1860 final int blockIndex = dynamicLayout.getBlockIndex(block); 1861 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1862 || mTextRenderNodes[blockIndex] == null 1863 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1864 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1865 layout, highlight, highlightPaint, cursorOffsetVertical, 1866 blockEndLines, blockIndices, block, numberOfBlocks, 1867 startIndexToFindAvailableRenderNode); 1868 } 1869 } 1870 } 1871 1872 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1873 } else { 1874 // Boring layout is used for empty and hint text 1875 layout.drawText(canvas, firstLine, lastLine); 1876 } 1877 } 1878 1879 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1880 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1881 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1882 int startIndexToFindAvailableRenderNode) { 1883 final int blockEndLine = blockEndLines[blockInfoIndex]; 1884 int blockIndex = blockIndices[blockInfoIndex]; 1885 1886 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1887 if (blockIsInvalid) { 1888 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1889 startIndexToFindAvailableRenderNode); 1890 // Note how dynamic layout's internal block indices get updated from Editor 1891 blockIndices[blockInfoIndex] = blockIndex; 1892 if (mTextRenderNodes[blockIndex] != null) { 1893 mTextRenderNodes[blockIndex].isDirty = true; 1894 } 1895 startIndexToFindAvailableRenderNode = blockIndex + 1; 1896 } 1897 1898 if (mTextRenderNodes[blockIndex] == null) { 1899 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1900 } 1901 1902 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1903 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1904 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1905 final int blockBeginLine = blockInfoIndex == 0 ? 1906 0 : blockEndLines[blockInfoIndex - 1] + 1; 1907 final int top = layout.getLineTop(blockBeginLine); 1908 final int bottom = layout.getLineBottom(blockEndLine); 1909 int left = 0; 1910 int right = mTextView.getWidth(); 1911 if (mTextView.getHorizontallyScrolling()) { 1912 float min = Float.MAX_VALUE; 1913 float max = Float.MIN_VALUE; 1914 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1915 min = Math.min(min, layout.getLineLeft(line)); 1916 max = Math.max(max, layout.getLineRight(line)); 1917 } 1918 left = (int) min; 1919 right = (int) (max + 0.5f); 1920 } 1921 1922 // Rebuild display list if it is invalid 1923 if (blockDisplayListIsInvalid) { 1924 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1925 right - left, bottom - top); 1926 try { 1927 // drawText is always relative to TextView's origin, this translation 1928 // brings this range of text back to the top left corner of the viewport 1929 displayListCanvas.translate(-left, -top); 1930 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1931 mTextRenderNodes[blockIndex].isDirty = false; 1932 // No need to untranslate, previous context is popped after 1933 // drawDisplayList 1934 } finally { 1935 blockDisplayList.end(displayListCanvas); 1936 // Same as drawDisplayList below, handled by our TextView's parent 1937 blockDisplayList.setClipToBounds(false); 1938 } 1939 } 1940 1941 // Valid display list only needs to update its drawing location. 1942 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1943 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1944 } 1945 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1946 return startIndexToFindAvailableRenderNode; 1947 } 1948 1949 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1950 int searchStartIndex) { 1951 int length = mTextRenderNodes.length; 1952 for (int i = searchStartIndex; i < length; i++) { 1953 boolean blockIndexFound = false; 1954 for (int j = 0; j < numberOfBlocks; j++) { 1955 if (blockIndices[j] == i) { 1956 blockIndexFound = true; 1957 break; 1958 } 1959 } 1960 if (blockIndexFound) continue; 1961 return i; 1962 } 1963 1964 // No available index found, the pool has to grow 1965 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1966 return length; 1967 } 1968 1969 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1970 final boolean translate = cursorOffsetVertical != 0; 1971 if (translate) canvas.translate(0, cursorOffsetVertical); 1972 if (mDrawableForCursor != null) { 1973 mDrawableForCursor.draw(canvas); 1974 } 1975 if (translate) canvas.translate(0, -cursorOffsetVertical); 1976 } 1977 1978 void invalidateHandlesAndActionMode() { 1979 if (mSelectionModifierCursorController != null) { 1980 mSelectionModifierCursorController.invalidateHandles(); 1981 } 1982 if (mInsertionPointCursorController != null) { 1983 mInsertionPointCursorController.invalidateHandle(); 1984 } 1985 if (mTextActionMode != null) { 1986 invalidateActionMode(); 1987 } 1988 } 1989 1990 /** 1991 * Invalidates all the sub-display lists that overlap the specified character range 1992 */ 1993 void invalidateTextDisplayList(Layout layout, int start, int end) { 1994 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1995 final int firstLine = layout.getLineForOffset(start); 1996 final int lastLine = layout.getLineForOffset(end); 1997 1998 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1999 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 2000 int[] blockIndices = dynamicLayout.getBlockIndices(); 2001 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 2002 2003 int i = 0; 2004 // Skip the blocks before firstLine 2005 while (i < numberOfBlocks) { 2006 if (blockEndLines[i] >= firstLine) break; 2007 i++; 2008 } 2009 2010 // Invalidate all subsequent blocks until lastLine is passed 2011 while (i < numberOfBlocks) { 2012 final int blockIndex = blockIndices[i]; 2013 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 2014 mTextRenderNodes[blockIndex].isDirty = true; 2015 } 2016 if (blockEndLines[i] >= lastLine) break; 2017 i++; 2018 } 2019 } 2020 } 2021 2022 void invalidateTextDisplayList() { 2023 if (mTextRenderNodes != null) { 2024 for (int i = 0; i < mTextRenderNodes.length; i++) { 2025 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 2026 } 2027 } 2028 } 2029 2030 void updateCursorPosition() { 2031 if (mTextView.mCursorDrawableRes == 0) { 2032 mDrawableForCursor = null; 2033 return; 2034 } 2035 2036 final Layout layout = mTextView.getLayout(); 2037 final int offset = mTextView.getSelectionStart(); 2038 final int line = layout.getLineForOffset(offset); 2039 final int top = layout.getLineTop(line); 2040 final int bottom = layout.getLineBottomWithoutSpacing(line); 2041 2042 final boolean clamped = layout.shouldClampCursor(line); 2043 updateCursorPosition(top, bottom, layout.getPrimaryHorizontal(offset, clamped)); 2044 } 2045 2046 void refreshTextActionMode() { 2047 if (extractedTextModeWillBeStarted()) { 2048 mRestartActionModeOnNextRefresh = false; 2049 return; 2050 } 2051 final boolean hasSelection = mTextView.hasSelection(); 2052 final SelectionModifierCursorController selectionController = getSelectionController(); 2053 final InsertionPointCursorController insertionController = getInsertionController(); 2054 if ((selectionController != null && selectionController.isCursorBeingModified()) 2055 || (insertionController != null && insertionController.isCursorBeingModified())) { 2056 // ActionMode should be managed by the currently active cursor controller. 2057 mRestartActionModeOnNextRefresh = false; 2058 return; 2059 } 2060 if (hasSelection) { 2061 hideInsertionPointCursorController(); 2062 if (mTextActionMode == null) { 2063 if (mRestartActionModeOnNextRefresh) { 2064 // To avoid distraction, newly start action mode only when selection action 2065 // mode is being restarted. 2066 startSelectionActionModeAsync(false); 2067 } 2068 } else if (selectionController == null || !selectionController.isActive()) { 2069 // Insertion action mode is active. Avoid dismissing the selection. 2070 stopTextActionModeWithPreservingSelection(); 2071 startSelectionActionModeAsync(false); 2072 } else { 2073 mTextActionMode.invalidateContentRect(); 2074 } 2075 } else { 2076 // Insertion action mode is started only when insertion controller is explicitly 2077 // activated. 2078 if (insertionController == null || !insertionController.isActive()) { 2079 stopTextActionMode(); 2080 } else if (mTextActionMode != null) { 2081 mTextActionMode.invalidateContentRect(); 2082 } 2083 } 2084 mRestartActionModeOnNextRefresh = false; 2085 } 2086 2087 /** 2088 * Start an Insertion action mode. 2089 */ 2090 void startInsertionActionMode() { 2091 if (mInsertionActionModeRunnable != null) { 2092 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2093 } 2094 if (extractedTextModeWillBeStarted()) { 2095 return; 2096 } 2097 stopTextActionMode(); 2098 2099 ActionMode.Callback actionModeCallback = 2100 new TextActionModeCallback(TextActionMode.INSERTION); 2101 mTextActionMode = mTextView.startActionMode( 2102 actionModeCallback, ActionMode.TYPE_FLOATING); 2103 if (mTextActionMode != null && getInsertionController() != null) { 2104 getInsertionController().show(); 2105 } 2106 } 2107 2108 @NonNull 2109 TextView getTextView() { 2110 return mTextView; 2111 } 2112 2113 @Nullable 2114 ActionMode getTextActionMode() { 2115 return mTextActionMode; 2116 } 2117 2118 void setRestartActionModeOnNextRefresh(boolean value) { 2119 mRestartActionModeOnNextRefresh = value; 2120 } 2121 2122 /** 2123 * Asynchronously starts a selection action mode using the TextClassifier. 2124 */ 2125 void startSelectionActionModeAsync(boolean adjustSelection) { 2126 getSelectionActionModeHelper().startSelectionActionModeAsync(adjustSelection); 2127 } 2128 2129 void startLinkActionModeAsync(int start, int end) { 2130 if (!(mTextView.getText() instanceof Spannable)) { 2131 return; 2132 } 2133 stopTextActionMode(); 2134 mRequestingLinkActionMode = true; 2135 getSelectionActionModeHelper().startLinkActionModeAsync(start, end); 2136 } 2137 2138 /** 2139 * Asynchronously invalidates an action mode using the TextClassifier. 2140 */ 2141 void invalidateActionModeAsync() { 2142 getSelectionActionModeHelper().invalidateActionModeAsync(); 2143 } 2144 2145 /** 2146 * Synchronously invalidates an action mode without the TextClassifier. 2147 */ 2148 private void invalidateActionMode() { 2149 if (mTextActionMode != null) { 2150 mTextActionMode.invalidate(); 2151 } 2152 } 2153 2154 private SelectionActionModeHelper getSelectionActionModeHelper() { 2155 if (mSelectionActionModeHelper == null) { 2156 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2157 } 2158 return mSelectionActionModeHelper; 2159 } 2160 2161 /** 2162 * If the TextView allows text selection, selects the current word when no existing selection 2163 * was available and starts a drag. 2164 * 2165 * @return true if the drag was started. 2166 */ 2167 private boolean selectCurrentWordAndStartDrag() { 2168 if (mInsertionActionModeRunnable != null) { 2169 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2170 } 2171 if (extractedTextModeWillBeStarted()) { 2172 return false; 2173 } 2174 if (!checkField()) { 2175 return false; 2176 } 2177 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2178 // No selection and cannot select a word. 2179 return false; 2180 } 2181 stopTextActionModeWithPreservingSelection(); 2182 getSelectionController().enterDrag( 2183 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2184 return true; 2185 } 2186 2187 /** 2188 * Checks whether a selection can be performed on the current TextView. 2189 * 2190 * @return true if a selection can be performed 2191 */ 2192 boolean checkField() { 2193 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2194 Log.w(TextView.LOG_TAG, 2195 "TextView does not support text selection. Selection cancelled."); 2196 return false; 2197 } 2198 return true; 2199 } 2200 2201 boolean startActionModeInternal(@TextActionMode int actionMode) { 2202 if (extractedTextModeWillBeStarted()) { 2203 return false; 2204 } 2205 if (mTextActionMode != null) { 2206 // Text action mode is already started 2207 invalidateActionMode(); 2208 return false; 2209 } 2210 2211 if (actionMode != TextActionMode.TEXT_LINK 2212 && (!checkField() || !mTextView.hasSelection())) { 2213 return false; 2214 } 2215 2216 ActionMode.Callback actionModeCallback = new TextActionModeCallback(actionMode); 2217 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2218 2219 final boolean selectableText = mTextView.isTextEditable() || mTextView.isTextSelectable(); 2220 if (actionMode == TextActionMode.TEXT_LINK && !selectableText 2221 && mTextActionMode instanceof FloatingActionMode) { 2222 // Make the toolbar outside-touchable so that it can be dismissed when the user clicks 2223 // outside of it. 2224 ((FloatingActionMode) mTextActionMode).setOutsideTouchable(true, 2225 () -> stopTextActionMode()); 2226 } 2227 2228 final boolean selectionStarted = mTextActionMode != null; 2229 if (selectionStarted 2230 && mTextView.isTextEditable() && !mTextView.isTextSelectable() 2231 && mShowSoftInputOnFocus) { 2232 // Show the IME to be able to replace text, except when selecting non editable text. 2233 final InputMethodManager imm = InputMethodManager.peekInstance(); 2234 if (imm != null) { 2235 imm.showSoftInput(mTextView, 0, null); 2236 } 2237 } 2238 return selectionStarted; 2239 } 2240 2241 private boolean extractedTextModeWillBeStarted() { 2242 if (!(mTextView.isInExtractedMode())) { 2243 final InputMethodManager imm = InputMethodManager.peekInstance(); 2244 return imm != null && imm.isFullscreenMode(); 2245 } 2246 return false; 2247 } 2248 2249 /** 2250 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2251 * the current cursor position or selection range. This method is consistent with the 2252 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2253 */ 2254 private boolean shouldOfferToShowSuggestions() { 2255 CharSequence text = mTextView.getText(); 2256 if (!(text instanceof Spannable)) return false; 2257 2258 final Spannable spannable = (Spannable) text; 2259 final int selectionStart = mTextView.getSelectionStart(); 2260 final int selectionEnd = mTextView.getSelectionEnd(); 2261 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2262 SuggestionSpan.class); 2263 if (suggestionSpans.length == 0) { 2264 return false; 2265 } 2266 if (selectionStart == selectionEnd) { 2267 // Spans overlap the cursor. 2268 for (int i = 0; i < suggestionSpans.length; i++) { 2269 if (suggestionSpans[i].getSuggestions().length > 0) { 2270 return true; 2271 } 2272 } 2273 return false; 2274 } 2275 int minSpanStart = mTextView.getText().length(); 2276 int maxSpanEnd = 0; 2277 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2278 int unionOfSpansCoveringSelectionStartEnd = 0; 2279 boolean hasValidSuggestions = false; 2280 for (int i = 0; i < suggestionSpans.length; i++) { 2281 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2282 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2283 minSpanStart = Math.min(minSpanStart, spanStart); 2284 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2285 if (selectionStart < spanStart || selectionStart > spanEnd) { 2286 // The span doesn't cover the current selection start point. 2287 continue; 2288 } 2289 hasValidSuggestions = 2290 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2291 unionOfSpansCoveringSelectionStartStart = 2292 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2293 unionOfSpansCoveringSelectionStartEnd = 2294 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2295 } 2296 if (!hasValidSuggestions) { 2297 return false; 2298 } 2299 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2300 // No spans cover the selection start point. 2301 return false; 2302 } 2303 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2304 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2305 // There is a span that is not covered by the union. In this case, we soouldn't offer 2306 // to show suggestions as it's confusing. 2307 return false; 2308 } 2309 return true; 2310 } 2311 2312 /** 2313 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2314 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2315 */ 2316 private boolean isCursorInsideEasyCorrectionSpan() { 2317 Spannable spannable = (Spannable) mTextView.getText(); 2318 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2319 mTextView.getSelectionEnd(), SuggestionSpan.class); 2320 for (int i = 0; i < suggestionSpans.length; i++) { 2321 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2322 return true; 2323 } 2324 } 2325 return false; 2326 } 2327 2328 void onTouchUpEvent(MotionEvent event) { 2329 if (getSelectionActionModeHelper().resetSelection( 2330 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2331 return; 2332 } 2333 2334 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2335 hideCursorAndSpanControllers(); 2336 stopTextActionMode(); 2337 CharSequence text = mTextView.getText(); 2338 if (!selectAllGotFocus && text.length() > 0) { 2339 // Move cursor 2340 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2341 2342 final boolean shouldInsertCursor = !mRequestingLinkActionMode; 2343 if (shouldInsertCursor) { 2344 Selection.setSelection((Spannable) text, offset); 2345 if (mSpellChecker != null) { 2346 // When the cursor moves, the word that was typed may need spell check 2347 mSpellChecker.onSelectionChanged(); 2348 } 2349 } 2350 2351 if (!extractedTextModeWillBeStarted()) { 2352 if (isCursorInsideEasyCorrectionSpan()) { 2353 // Cancel the single tap delayed runnable. 2354 if (mInsertionActionModeRunnable != null) { 2355 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2356 } 2357 2358 mShowSuggestionRunnable = this::replace; 2359 2360 // removeCallbacks is performed on every touch 2361 mTextView.postDelayed(mShowSuggestionRunnable, 2362 ViewConfiguration.getDoubleTapTimeout()); 2363 } else if (hasInsertionController()) { 2364 if (shouldInsertCursor) { 2365 getInsertionController().show(); 2366 } else { 2367 getInsertionController().hide(); 2368 } 2369 } 2370 } 2371 } 2372 } 2373 2374 protected void stopTextActionMode() { 2375 if (mTextActionMode != null) { 2376 // This will hide the mSelectionModifierCursorController 2377 mTextActionMode.finish(); 2378 } 2379 } 2380 2381 private void stopTextActionModeWithPreservingSelection() { 2382 if (mTextActionMode != null) { 2383 mRestartActionModeOnNextRefresh = true; 2384 } 2385 mPreserveSelection = true; 2386 stopTextActionMode(); 2387 mPreserveSelection = false; 2388 } 2389 2390 /** 2391 * @return True if this view supports insertion handles. 2392 */ 2393 boolean hasInsertionController() { 2394 return mInsertionControllerEnabled; 2395 } 2396 2397 /** 2398 * @return True if this view supports selection handles. 2399 */ 2400 boolean hasSelectionController() { 2401 return mSelectionControllerEnabled; 2402 } 2403 2404 private InsertionPointCursorController getInsertionController() { 2405 if (!mInsertionControllerEnabled) { 2406 return null; 2407 } 2408 2409 if (mInsertionPointCursorController == null) { 2410 mInsertionPointCursorController = new InsertionPointCursorController(); 2411 2412 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2413 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2414 } 2415 2416 return mInsertionPointCursorController; 2417 } 2418 2419 @Nullable 2420 SelectionModifierCursorController getSelectionController() { 2421 if (!mSelectionControllerEnabled) { 2422 return null; 2423 } 2424 2425 if (mSelectionModifierCursorController == null) { 2426 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2427 2428 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2429 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2430 } 2431 2432 return mSelectionModifierCursorController; 2433 } 2434 2435 @VisibleForTesting 2436 @Nullable 2437 public Drawable getCursorDrawable() { 2438 return mDrawableForCursor; 2439 } 2440 2441 private void updateCursorPosition(int top, int bottom, float horizontal) { 2442 if (mDrawableForCursor == null) { 2443 mDrawableForCursor = mTextView.getContext().getDrawable( 2444 mTextView.mCursorDrawableRes); 2445 } 2446 final int left = clampHorizontalPosition(mDrawableForCursor, horizontal); 2447 final int width = mDrawableForCursor.getIntrinsicWidth(); 2448 mDrawableForCursor.setBounds(left, top - mTempRect.top, left + width, 2449 bottom + mTempRect.bottom); 2450 } 2451 2452 /** 2453 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2454 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2455 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2456 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2457 * of the view. 2458 * 2459 * @param drawable Drawable. Can be null. 2460 * @param horizontal Horizontal position for the drawable. 2461 * @return The clamped horizontal position for the drawable. 2462 */ 2463 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2464 horizontal = Math.max(0.5f, horizontal - 0.5f); 2465 if (mTempRect == null) mTempRect = new Rect(); 2466 2467 int drawableWidth = 0; 2468 if (drawable != null) { 2469 drawable.getPadding(mTempRect); 2470 drawableWidth = drawable.getIntrinsicWidth(); 2471 } else { 2472 mTempRect.setEmpty(); 2473 } 2474 2475 int scrollX = mTextView.getScrollX(); 2476 float horizontalDiff = horizontal - scrollX; 2477 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2478 - mTextView.getCompoundPaddingRight(); 2479 2480 final int left; 2481 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2482 // at the rightmost position 2483 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2484 } else if (Math.abs(horizontalDiff) <= 1f 2485 || (TextUtils.isEmpty(mTextView.getText()) 2486 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2487 && horizontal <= 1f)) { 2488 // at the leftmost position 2489 left = scrollX - mTempRect.left; 2490 } else { 2491 left = (int) horizontal - mTempRect.left; 2492 } 2493 return left; 2494 } 2495 2496 /** 2497 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2498 * a dictionary) from the current input method, provided by it calling 2499 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2500 * implementation flashes the background of the corrected word to provide feedback to the user. 2501 * 2502 * @param info The auto correct info about the text that was corrected. 2503 */ 2504 public void onCommitCorrection(CorrectionInfo info) { 2505 if (mCorrectionHighlighter == null) { 2506 mCorrectionHighlighter = new CorrectionHighlighter(); 2507 } else { 2508 mCorrectionHighlighter.invalidate(false); 2509 } 2510 2511 mCorrectionHighlighter.highlight(info); 2512 mUndoInputFilter.freezeLastEdit(); 2513 } 2514 2515 void onScrollChanged() { 2516 if (mPositionListener != null) { 2517 mPositionListener.onScrollChanged(); 2518 } 2519 if (mTextActionMode != null) { 2520 mTextActionMode.invalidateContentRect(); 2521 } 2522 } 2523 2524 /** 2525 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2526 */ 2527 private boolean shouldBlink() { 2528 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2529 2530 final int start = mTextView.getSelectionStart(); 2531 if (start < 0) return false; 2532 2533 final int end = mTextView.getSelectionEnd(); 2534 if (end < 0) return false; 2535 2536 return start == end; 2537 } 2538 2539 void makeBlink() { 2540 if (shouldBlink()) { 2541 mShowCursor = SystemClock.uptimeMillis(); 2542 if (mBlink == null) mBlink = new Blink(); 2543 mTextView.removeCallbacks(mBlink); 2544 mTextView.postDelayed(mBlink, BLINK); 2545 } else { 2546 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2547 } 2548 } 2549 2550 private class Blink implements Runnable { 2551 private boolean mCancelled; 2552 2553 public void run() { 2554 if (mCancelled) { 2555 return; 2556 } 2557 2558 mTextView.removeCallbacks(this); 2559 2560 if (shouldBlink()) { 2561 if (mTextView.getLayout() != null) { 2562 mTextView.invalidateCursorPath(); 2563 } 2564 2565 mTextView.postDelayed(this, BLINK); 2566 } 2567 } 2568 2569 void cancel() { 2570 if (!mCancelled) { 2571 mTextView.removeCallbacks(this); 2572 mCancelled = true; 2573 } 2574 } 2575 2576 void uncancel() { 2577 mCancelled = false; 2578 } 2579 } 2580 2581 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2582 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2583 com.android.internal.R.layout.text_drag_thumbnail, null); 2584 2585 if (shadowView == null) { 2586 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2587 } 2588 2589 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2590 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2591 end = TextUtils.unpackRangeEndFromLong(range); 2592 } 2593 final CharSequence text = mTextView.getTransformedText(start, end); 2594 shadowView.setText(text); 2595 shadowView.setTextColor(mTextView.getTextColors()); 2596 2597 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2598 shadowView.setGravity(Gravity.CENTER); 2599 2600 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2601 ViewGroup.LayoutParams.WRAP_CONTENT)); 2602 2603 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2604 shadowView.measure(size, size); 2605 2606 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2607 shadowView.invalidate(); 2608 return new DragShadowBuilder(shadowView); 2609 } 2610 2611 private static class DragLocalState { 2612 public TextView sourceTextView; 2613 public int start, end; 2614 2615 public DragLocalState(TextView sourceTextView, int start, int end) { 2616 this.sourceTextView = sourceTextView; 2617 this.start = start; 2618 this.end = end; 2619 } 2620 } 2621 2622 void onDrop(DragEvent event) { 2623 SpannableStringBuilder content = new SpannableStringBuilder(); 2624 2625 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2626 if (permissions != null) { 2627 permissions.takeTransient(); 2628 } 2629 2630 try { 2631 ClipData clipData = event.getClipData(); 2632 final int itemCount = clipData.getItemCount(); 2633 for (int i = 0; i < itemCount; i++) { 2634 Item item = clipData.getItemAt(i); 2635 content.append(item.coerceToStyledText(mTextView.getContext())); 2636 } 2637 } finally { 2638 if (permissions != null) { 2639 permissions.release(); 2640 } 2641 } 2642 2643 mTextView.beginBatchEdit(); 2644 mUndoInputFilter.freezeLastEdit(); 2645 try { 2646 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2647 Object localState = event.getLocalState(); 2648 DragLocalState dragLocalState = null; 2649 if (localState instanceof DragLocalState) { 2650 dragLocalState = (DragLocalState) localState; 2651 } 2652 boolean dragDropIntoItself = dragLocalState != null 2653 && dragLocalState.sourceTextView == mTextView; 2654 2655 if (dragDropIntoItself) { 2656 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2657 // A drop inside the original selection discards the drop. 2658 return; 2659 } 2660 } 2661 2662 final int originalLength = mTextView.getText().length(); 2663 int min = offset; 2664 int max = offset; 2665 2666 Selection.setSelection((Spannable) mTextView.getText(), max); 2667 mTextView.replaceText_internal(min, max, content); 2668 2669 if (dragDropIntoItself) { 2670 int dragSourceStart = dragLocalState.start; 2671 int dragSourceEnd = dragLocalState.end; 2672 if (max <= dragSourceStart) { 2673 // Inserting text before selection has shifted positions 2674 final int shift = mTextView.getText().length() - originalLength; 2675 dragSourceStart += shift; 2676 dragSourceEnd += shift; 2677 } 2678 2679 // Delete original selection 2680 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2681 2682 // Make sure we do not leave two adjacent spaces. 2683 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2684 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2685 if (nextCharIdx > prevCharIdx + 1) { 2686 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2687 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2688 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2689 } 2690 } 2691 } 2692 } finally { 2693 mTextView.endBatchEdit(); 2694 mUndoInputFilter.freezeLastEdit(); 2695 } 2696 } 2697 2698 public void addSpanWatchers(Spannable text) { 2699 final int textLength = text.length(); 2700 2701 if (mKeyListener != null) { 2702 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2703 } 2704 2705 if (mSpanController == null) { 2706 mSpanController = new SpanController(); 2707 } 2708 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2709 } 2710 2711 void setContextMenuAnchor(float x, float y) { 2712 mContextMenuAnchorX = x; 2713 mContextMenuAnchorY = y; 2714 } 2715 2716 void onCreateContextMenu(ContextMenu menu) { 2717 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2718 || Float.isNaN(mContextMenuAnchorY)) { 2719 return; 2720 } 2721 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2722 if (offset == -1) { 2723 return; 2724 } 2725 2726 stopTextActionModeWithPreservingSelection(); 2727 if (mTextView.canSelectText()) { 2728 final boolean isOnSelection = mTextView.hasSelection() 2729 && offset >= mTextView.getSelectionStart() 2730 && offset <= mTextView.getSelectionEnd(); 2731 if (!isOnSelection) { 2732 // Right clicked position is not on the selection. Remove the selection and move the 2733 // cursor to the right clicked position. 2734 Selection.setSelection((Spannable) mTextView.getText(), offset); 2735 stopTextActionMode(); 2736 } 2737 } 2738 2739 if (shouldOfferToShowSuggestions()) { 2740 final SuggestionInfo[] suggestionInfoArray = 2741 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2742 for (int i = 0; i < suggestionInfoArray.length; i++) { 2743 suggestionInfoArray[i] = new SuggestionInfo(); 2744 } 2745 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2746 com.android.internal.R.string.replace); 2747 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2748 for (int i = 0; i < numItems; i++) { 2749 final SuggestionInfo info = suggestionInfoArray[i]; 2750 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2751 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2752 @Override 2753 public boolean onMenuItemClick(MenuItem item) { 2754 replaceWithSuggestion(info); 2755 return true; 2756 } 2757 }); 2758 } 2759 } 2760 2761 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2762 com.android.internal.R.string.undo) 2763 .setAlphabeticShortcut('z') 2764 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2765 .setEnabled(mTextView.canUndo()); 2766 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2767 com.android.internal.R.string.redo) 2768 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2769 .setEnabled(mTextView.canRedo()); 2770 2771 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2772 com.android.internal.R.string.cut) 2773 .setAlphabeticShortcut('x') 2774 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2775 .setEnabled(mTextView.canCut()); 2776 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2777 com.android.internal.R.string.copy) 2778 .setAlphabeticShortcut('c') 2779 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2780 .setEnabled(mTextView.canCopy()); 2781 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2782 com.android.internal.R.string.paste) 2783 .setAlphabeticShortcut('v') 2784 .setEnabled(mTextView.canPaste()) 2785 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2786 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2787 com.android.internal.R.string.paste_as_plain_text) 2788 .setEnabled(mTextView.canPasteAsPlainText()) 2789 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2790 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2791 com.android.internal.R.string.share) 2792 .setEnabled(mTextView.canShare()) 2793 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2794 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2795 com.android.internal.R.string.selectAll) 2796 .setAlphabeticShortcut('a') 2797 .setEnabled(mTextView.canSelectAllText()) 2798 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2799 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2800 android.R.string.autofill) 2801 .setEnabled(mTextView.canRequestAutofill()) 2802 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2803 2804 mPreserveSelection = true; 2805 } 2806 2807 @Nullable 2808 private SuggestionSpan findEquivalentSuggestionSpan( 2809 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2810 final Editable editable = (Editable) mTextView.getText(); 2811 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2812 // Exactly same span is found. 2813 return suggestionSpanInfo.mSuggestionSpan; 2814 } 2815 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2816 // contents. 2817 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2818 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2819 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2820 final int start = editable.getSpanStart(suggestionSpan); 2821 if (start != suggestionSpanInfo.mSpanStart) { 2822 continue; 2823 } 2824 final int end = editable.getSpanEnd(suggestionSpan); 2825 if (end != suggestionSpanInfo.mSpanEnd) { 2826 continue; 2827 } 2828 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2829 return suggestionSpan; 2830 } 2831 } 2832 return null; 2833 } 2834 2835 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2836 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2837 suggestionInfo.mSuggestionSpanInfo); 2838 if (targetSuggestionSpan == null) { 2839 // Span has been removed 2840 return; 2841 } 2842 final Editable editable = (Editable) mTextView.getText(); 2843 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2844 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2845 if (spanStart < 0 || spanEnd <= spanStart) { 2846 // Span has been removed 2847 return; 2848 } 2849 2850 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2851 // SuggestionSpans are removed by replace: save them before 2852 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2853 SuggestionSpan.class); 2854 final int length = suggestionSpans.length; 2855 int[] suggestionSpansStarts = new int[length]; 2856 int[] suggestionSpansEnds = new int[length]; 2857 int[] suggestionSpansFlags = new int[length]; 2858 for (int i = 0; i < length; i++) { 2859 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2860 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2861 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2862 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2863 2864 // Remove potential misspelled flags 2865 int suggestionSpanFlags = suggestionSpan.getFlags(); 2866 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2867 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2868 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2869 suggestionSpan.setFlags(suggestionSpanFlags); 2870 } 2871 } 2872 2873 // Notify source IME of the suggestion pick. Do this before swapping texts. 2874 targetSuggestionSpan.notifySelection( 2875 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2876 2877 // Swap text content between actual text and Suggestion span 2878 final int suggestionStart = suggestionInfo.mSuggestionStart; 2879 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2880 final String suggestion = suggestionInfo.mText.subSequence( 2881 suggestionStart, suggestionEnd).toString(); 2882 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2883 2884 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2885 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2886 2887 // Restore previous SuggestionSpans 2888 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2889 for (int i = 0; i < length; i++) { 2890 // Only spans that include the modified region make sense after replacement 2891 // Spans partially included in the replaced region are removed, there is no 2892 // way to assign them a valid range after replacement 2893 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2894 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2895 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2896 } 2897 } 2898 // Move cursor at the end of the replaced word 2899 final int newCursorPosition = spanEnd + lengthDelta; 2900 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2901 } 2902 2903 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2904 new MenuItem.OnMenuItemClickListener() { 2905 @Override 2906 public boolean onMenuItemClick(MenuItem item) { 2907 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2908 return true; 2909 } 2910 return mTextView.onTextContextMenuItem(item.getItemId()); 2911 } 2912 }; 2913 2914 /** 2915 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2916 * pop-up should be displayed. 2917 * Also monitors {@link Selection} to call back to the attached input method. 2918 */ 2919 private class SpanController implements SpanWatcher { 2920 2921 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2922 2923 private EasyEditPopupWindow mPopupWindow; 2924 2925 private Runnable mHidePopup; 2926 2927 // This function is pure but inner classes can't have static functions 2928 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2929 final Object span) { 2930 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2931 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2932 } 2933 2934 @Override 2935 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2936 if (isNonIntermediateSelectionSpan(text, span)) { 2937 sendUpdateSelection(); 2938 } else if (span instanceof EasyEditSpan) { 2939 if (mPopupWindow == null) { 2940 mPopupWindow = new EasyEditPopupWindow(); 2941 mHidePopup = new Runnable() { 2942 @Override 2943 public void run() { 2944 hide(); 2945 } 2946 }; 2947 } 2948 2949 // Make sure there is only at most one EasyEditSpan in the text 2950 if (mPopupWindow.mEasyEditSpan != null) { 2951 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2952 } 2953 2954 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2955 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2956 @Override 2957 public void onDeleteClick(EasyEditSpan span) { 2958 Editable editable = (Editable) mTextView.getText(); 2959 int start = editable.getSpanStart(span); 2960 int end = editable.getSpanEnd(span); 2961 if (start >= 0 && end >= 0) { 2962 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2963 mTextView.deleteText_internal(start, end); 2964 } 2965 editable.removeSpan(span); 2966 } 2967 }); 2968 2969 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2970 // The window is not visible yet, ignore the text change. 2971 return; 2972 } 2973 2974 if (mTextView.getLayout() == null) { 2975 // The view has not been laid out yet, ignore the text change 2976 return; 2977 } 2978 2979 if (extractedTextModeWillBeStarted()) { 2980 // The input is in extract mode. Do not handle the easy edit in 2981 // the original TextView, as the ExtractEditText will do 2982 return; 2983 } 2984 2985 mPopupWindow.show(); 2986 mTextView.removeCallbacks(mHidePopup); 2987 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2988 } 2989 } 2990 2991 @Override 2992 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2993 if (isNonIntermediateSelectionSpan(text, span)) { 2994 sendUpdateSelection(); 2995 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2996 hide(); 2997 } 2998 } 2999 3000 @Override 3001 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 3002 int newStart, int newEnd) { 3003 if (isNonIntermediateSelectionSpan(text, span)) { 3004 sendUpdateSelection(); 3005 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 3006 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 3007 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 3008 text.removeSpan(easyEditSpan); 3009 } 3010 } 3011 3012 public void hide() { 3013 if (mPopupWindow != null) { 3014 mPopupWindow.hide(); 3015 mTextView.removeCallbacks(mHidePopup); 3016 } 3017 } 3018 3019 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 3020 try { 3021 PendingIntent pendingIntent = span.getPendingIntent(); 3022 if (pendingIntent != null) { 3023 Intent intent = new Intent(); 3024 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 3025 pendingIntent.send(mTextView.getContext(), 0, intent); 3026 } 3027 } catch (CanceledException e) { 3028 // This should not happen, as we should try to send the intent only once. 3029 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 3030 } 3031 } 3032 } 3033 3034 /** 3035 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 3036 */ 3037 private interface EasyEditDeleteListener { 3038 3039 /** 3040 * Clicks the delete pop-up. 3041 */ 3042 void onDeleteClick(EasyEditSpan span); 3043 } 3044 3045 /** 3046 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 3047 * by {@link SpanController}. 3048 */ 3049 private class EasyEditPopupWindow extends PinnedPopupWindow 3050 implements OnClickListener { 3051 private static final int POPUP_TEXT_LAYOUT = 3052 com.android.internal.R.layout.text_edit_action_popup_text; 3053 private TextView mDeleteTextView; 3054 private EasyEditSpan mEasyEditSpan; 3055 private EasyEditDeleteListener mOnDeleteListener; 3056 3057 @Override 3058 protected void createPopupWindow() { 3059 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 3060 com.android.internal.R.attr.textSelectHandleWindowStyle); 3061 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3062 mPopupWindow.setClippingEnabled(true); 3063 } 3064 3065 @Override 3066 protected void initContentView() { 3067 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 3068 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 3069 mContentView = linearLayout; 3070 mContentView.setBackgroundResource( 3071 com.android.internal.R.drawable.text_edit_side_paste_window); 3072 3073 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 3074 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3075 3076 LayoutParams wrapContent = new LayoutParams( 3077 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 3078 3079 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3080 mDeleteTextView.setLayoutParams(wrapContent); 3081 mDeleteTextView.setText(com.android.internal.R.string.delete); 3082 mDeleteTextView.setOnClickListener(this); 3083 mContentView.addView(mDeleteTextView); 3084 } 3085 3086 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 3087 mEasyEditSpan = easyEditSpan; 3088 } 3089 3090 private void setOnDeleteListener(EasyEditDeleteListener listener) { 3091 mOnDeleteListener = listener; 3092 } 3093 3094 @Override 3095 public void onClick(View view) { 3096 if (view == mDeleteTextView 3097 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 3098 && mOnDeleteListener != null) { 3099 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 3100 } 3101 } 3102 3103 @Override 3104 public void hide() { 3105 if (mEasyEditSpan != null) { 3106 mEasyEditSpan.setDeleteEnabled(false); 3107 } 3108 mOnDeleteListener = null; 3109 super.hide(); 3110 } 3111 3112 @Override 3113 protected int getTextOffset() { 3114 // Place the pop-up at the end of the span 3115 Editable editable = (Editable) mTextView.getText(); 3116 return editable.getSpanEnd(mEasyEditSpan); 3117 } 3118 3119 @Override 3120 protected int getVerticalLocalPosition(int line) { 3121 final Layout layout = mTextView.getLayout(); 3122 return layout.getLineBottomWithoutSpacing(line); 3123 } 3124 3125 @Override 3126 protected int clipVertically(int positionY) { 3127 // As we display the pop-up below the span, no vertical clipping is required. 3128 return positionY; 3129 } 3130 } 3131 3132 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 3133 // 3 handles 3134 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 3135 // 1 CursorAnchorInfoNotifier 3136 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 3137 private TextViewPositionListener[] mPositionListeners = 3138 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 3139 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 3140 private boolean mPositionHasChanged = true; 3141 // Absolute position of the TextView with respect to its parent window 3142 private int mPositionX, mPositionY; 3143 private int mPositionXOnScreen, mPositionYOnScreen; 3144 private int mNumberOfListeners; 3145 private boolean mScrollHasChanged; 3146 final int[] mTempCoords = new int[2]; 3147 3148 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3149 if (mNumberOfListeners == 0) { 3150 updatePosition(); 3151 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3152 vto.addOnPreDrawListener(this); 3153 } 3154 3155 int emptySlotIndex = -1; 3156 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3157 TextViewPositionListener listener = mPositionListeners[i]; 3158 if (listener == positionListener) { 3159 return; 3160 } else if (emptySlotIndex < 0 && listener == null) { 3161 emptySlotIndex = i; 3162 } 3163 } 3164 3165 mPositionListeners[emptySlotIndex] = positionListener; 3166 mCanMove[emptySlotIndex] = canMove; 3167 mNumberOfListeners++; 3168 } 3169 3170 public void removeSubscriber(TextViewPositionListener positionListener) { 3171 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3172 if (mPositionListeners[i] == positionListener) { 3173 mPositionListeners[i] = null; 3174 mNumberOfListeners--; 3175 break; 3176 } 3177 } 3178 3179 if (mNumberOfListeners == 0) { 3180 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3181 vto.removeOnPreDrawListener(this); 3182 } 3183 } 3184 3185 public int getPositionX() { 3186 return mPositionX; 3187 } 3188 3189 public int getPositionY() { 3190 return mPositionY; 3191 } 3192 3193 public int getPositionXOnScreen() { 3194 return mPositionXOnScreen; 3195 } 3196 3197 public int getPositionYOnScreen() { 3198 return mPositionYOnScreen; 3199 } 3200 3201 @Override 3202 public boolean onPreDraw() { 3203 updatePosition(); 3204 3205 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3206 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3207 TextViewPositionListener positionListener = mPositionListeners[i]; 3208 if (positionListener != null) { 3209 positionListener.updatePosition(mPositionX, mPositionY, 3210 mPositionHasChanged, mScrollHasChanged); 3211 } 3212 } 3213 } 3214 3215 mScrollHasChanged = false; 3216 return true; 3217 } 3218 3219 private void updatePosition() { 3220 mTextView.getLocationInWindow(mTempCoords); 3221 3222 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3223 3224 mPositionX = mTempCoords[0]; 3225 mPositionY = mTempCoords[1]; 3226 3227 mTextView.getLocationOnScreen(mTempCoords); 3228 3229 mPositionXOnScreen = mTempCoords[0]; 3230 mPositionYOnScreen = mTempCoords[1]; 3231 } 3232 3233 public void onScrollChanged() { 3234 mScrollHasChanged = true; 3235 } 3236 } 3237 3238 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3239 protected PopupWindow mPopupWindow; 3240 protected ViewGroup mContentView; 3241 int mPositionX, mPositionY; 3242 int mClippingLimitLeft, mClippingLimitRight; 3243 3244 protected abstract void createPopupWindow(); 3245 protected abstract void initContentView(); 3246 protected abstract int getTextOffset(); 3247 protected abstract int getVerticalLocalPosition(int line); 3248 protected abstract int clipVertically(int positionY); 3249 protected void setUp() { 3250 } 3251 3252 public PinnedPopupWindow() { 3253 // Due to calling subclass methods in base constructor, subclass constructor is not 3254 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3255 // a chance to initialize subclasses, call setUp() method here. 3256 // TODO: It is good to extract non trivial initialization code from constructor. 3257 setUp(); 3258 3259 createPopupWindow(); 3260 3261 mPopupWindow.setWindowLayoutType( 3262 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3263 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3264 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3265 3266 initContentView(); 3267 3268 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3269 ViewGroup.LayoutParams.WRAP_CONTENT); 3270 mContentView.setLayoutParams(wrapContent); 3271 3272 mPopupWindow.setContentView(mContentView); 3273 } 3274 3275 public void show() { 3276 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3277 3278 computeLocalPosition(); 3279 3280 final PositionListener positionListener = getPositionListener(); 3281 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3282 } 3283 3284 protected void measureContent() { 3285 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3286 mContentView.measure( 3287 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3288 View.MeasureSpec.AT_MOST), 3289 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3290 View.MeasureSpec.AT_MOST)); 3291 } 3292 3293 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3294 * positioned according to viewportToContentHorizontalOffset. 3295 * 3296 * This method assumes that mContentView has properly been measured from its content. */ 3297 private void computeLocalPosition() { 3298 measureContent(); 3299 final int width = mContentView.getMeasuredWidth(); 3300 final int offset = getTextOffset(); 3301 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3302 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3303 3304 final int line = mTextView.getLayout().getLineForOffset(offset); 3305 mPositionY = getVerticalLocalPosition(line); 3306 mPositionY += mTextView.viewportToContentVerticalOffset(); 3307 } 3308 3309 private void updatePosition(int parentPositionX, int parentPositionY) { 3310 int positionX = parentPositionX + mPositionX; 3311 int positionY = parentPositionY + mPositionY; 3312 3313 positionY = clipVertically(positionY); 3314 3315 // Horizontal clipping 3316 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3317 final int width = mContentView.getMeasuredWidth(); 3318 positionX = Math.min( 3319 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3320 positionX = Math.max(-mClippingLimitLeft, positionX); 3321 3322 if (isShowing()) { 3323 mPopupWindow.update(positionX, positionY, -1, -1); 3324 } else { 3325 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3326 positionX, positionY); 3327 } 3328 } 3329 3330 public void hide() { 3331 if (!isShowing()) { 3332 return; 3333 } 3334 mPopupWindow.dismiss(); 3335 getPositionListener().removeSubscriber(this); 3336 } 3337 3338 @Override 3339 public void updatePosition(int parentPositionX, int parentPositionY, 3340 boolean parentPositionChanged, boolean parentScrolled) { 3341 // Either parentPositionChanged or parentScrolled is true, check if still visible 3342 if (isShowing() && isOffsetVisible(getTextOffset())) { 3343 if (parentScrolled) computeLocalPosition(); 3344 updatePosition(parentPositionX, parentPositionY); 3345 } else { 3346 hide(); 3347 } 3348 } 3349 3350 public boolean isShowing() { 3351 return mPopupWindow.isShowing(); 3352 } 3353 } 3354 3355 private static final class SuggestionInfo { 3356 // Range of actual suggestion within mText 3357 int mSuggestionStart, mSuggestionEnd; 3358 3359 // The SuggestionSpan that this TextView represents 3360 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3361 3362 // The index of this suggestion inside suggestionSpan 3363 int mSuggestionIndex; 3364 3365 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3366 3367 void clear() { 3368 mSuggestionSpanInfo.clear(); 3369 mText.clear(); 3370 } 3371 3372 // Utility method to set attributes about a SuggestionSpan. 3373 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3374 mSuggestionSpanInfo.mSuggestionSpan = span; 3375 mSuggestionSpanInfo.mSpanStart = spanStart; 3376 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3377 } 3378 } 3379 3380 private static final class SuggestionSpanInfo { 3381 // The SuggestionSpan; 3382 @Nullable 3383 SuggestionSpan mSuggestionSpan; 3384 3385 // The SuggestionSpan start position 3386 int mSpanStart; 3387 3388 // The SuggestionSpan end position 3389 int mSpanEnd; 3390 3391 void clear() { 3392 mSuggestionSpan = null; 3393 } 3394 } 3395 3396 private class SuggestionHelper { 3397 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3398 new SuggestionSpanComparator(); 3399 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3400 new HashMap<SuggestionSpan, Integer>(); 3401 3402 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3403 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3404 final int flag1 = span1.getFlags(); 3405 final int flag2 = span2.getFlags(); 3406 if (flag1 != flag2) { 3407 // The order here should match what is used in updateDrawState 3408 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3409 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3410 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3411 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3412 if (easy1 && !misspelled1) return -1; 3413 if (easy2 && !misspelled2) return 1; 3414 if (misspelled1) return -1; 3415 if (misspelled2) return 1; 3416 } 3417 3418 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3419 } 3420 } 3421 3422 /** 3423 * Returns the suggestion spans that cover the current cursor position. The suggestion 3424 * spans are sorted according to the length of text that they are attached to. 3425 */ 3426 private SuggestionSpan[] getSortedSuggestionSpans() { 3427 int pos = mTextView.getSelectionStart(); 3428 Spannable spannable = (Spannable) mTextView.getText(); 3429 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3430 3431 mSpansLengths.clear(); 3432 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3433 int start = spannable.getSpanStart(suggestionSpan); 3434 int end = spannable.getSpanEnd(suggestionSpan); 3435 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3436 } 3437 3438 // The suggestions are sorted according to their types (easy correction first, then 3439 // misspelled) and to the length of the text that they cover (shorter first). 3440 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3441 mSpansLengths.clear(); 3442 3443 return suggestionSpans; 3444 } 3445 3446 /** 3447 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3448 * position. 3449 * 3450 * @param suggestionInfos SuggestionInfo array the results will be set. 3451 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3452 * @return the number of suggestions actually fetched. 3453 */ 3454 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3455 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3456 final Spannable spannable = (Spannable) mTextView.getText(); 3457 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3458 final int nbSpans = suggestionSpans.length; 3459 if (nbSpans == 0) return 0; 3460 3461 int numberOfSuggestions = 0; 3462 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3463 final int spanStart = spannable.getSpanStart(suggestionSpan); 3464 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3465 3466 if (misspelledSpanInfo != null 3467 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3468 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3469 misspelledSpanInfo.mSpanStart = spanStart; 3470 misspelledSpanInfo.mSpanEnd = spanEnd; 3471 } 3472 3473 final String[] suggestions = suggestionSpan.getSuggestions(); 3474 final int nbSuggestions = suggestions.length; 3475 suggestionLoop: 3476 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3477 final String suggestion = suggestions[suggestionIndex]; 3478 for (int i = 0; i < numberOfSuggestions; i++) { 3479 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3480 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3481 final int otherSpanStart = 3482 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3483 final int otherSpanEnd = 3484 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3485 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3486 continue suggestionLoop; 3487 } 3488 } 3489 } 3490 3491 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3492 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3493 suggestionInfo.mSuggestionIndex = suggestionIndex; 3494 suggestionInfo.mSuggestionStart = 0; 3495 suggestionInfo.mSuggestionEnd = suggestion.length(); 3496 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3497 numberOfSuggestions++; 3498 if (numberOfSuggestions >= suggestionInfos.length) { 3499 return numberOfSuggestions; 3500 } 3501 } 3502 } 3503 return numberOfSuggestions; 3504 } 3505 } 3506 3507 @VisibleForTesting 3508 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3509 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3510 3511 // Key of intent extras for inserting new word into user dictionary. 3512 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3513 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3514 3515 private SuggestionInfo[] mSuggestionInfos; 3516 private int mNumberOfSuggestions; 3517 private boolean mCursorWasVisibleBeforeSuggestions; 3518 private boolean mIsShowingUp = false; 3519 private SuggestionAdapter mSuggestionsAdapter; 3520 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3521 private TextView mAddToDictionaryButton; 3522 private TextView mDeleteButton; 3523 private ListView mSuggestionListView; 3524 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3525 private int mContainerMarginWidth; 3526 private int mContainerMarginTop; 3527 private LinearLayout mContainerView; 3528 private Context mContext; // TODO: Make mContext final. 3529 3530 private class CustomPopupWindow extends PopupWindow { 3531 3532 @Override 3533 public void dismiss() { 3534 if (!isShowing()) { 3535 return; 3536 } 3537 super.dismiss(); 3538 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3539 3540 // Safe cast since show() checks that mTextView.getText() is an Editable 3541 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3542 3543 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3544 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3545 getInsertionController().show(); 3546 } 3547 } 3548 } 3549 3550 public SuggestionsPopupWindow() { 3551 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3552 } 3553 3554 @Override 3555 protected void setUp() { 3556 mContext = applyDefaultTheme(mTextView.getContext()); 3557 mHighlightSpan = new TextAppearanceSpan(mContext, 3558 mTextView.mTextEditSuggestionHighlightStyle); 3559 } 3560 3561 private Context applyDefaultTheme(Context originalContext) { 3562 TypedArray a = originalContext.obtainStyledAttributes( 3563 new int[]{com.android.internal.R.attr.isLightTheme}); 3564 boolean isLightTheme = a.getBoolean(0, true); 3565 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3566 : R.style.ThemeOverlay_Material_Dark; 3567 a.recycle(); 3568 return new ContextThemeWrapper(originalContext, themeId); 3569 } 3570 3571 @Override 3572 protected void createPopupWindow() { 3573 mPopupWindow = new CustomPopupWindow(); 3574 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3575 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3576 mPopupWindow.setFocusable(true); 3577 mPopupWindow.setClippingEnabled(false); 3578 } 3579 3580 @Override 3581 protected void initContentView() { 3582 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3583 Context.LAYOUT_INFLATER_SERVICE); 3584 mContentView = (ViewGroup) inflater.inflate( 3585 mTextView.mTextEditSuggestionContainerLayout, null); 3586 3587 mContainerView = (LinearLayout) mContentView.findViewById( 3588 com.android.internal.R.id.suggestionWindowContainer); 3589 ViewGroup.MarginLayoutParams lp = 3590 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3591 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3592 mContainerMarginTop = lp.topMargin; 3593 mClippingLimitLeft = lp.leftMargin; 3594 mClippingLimitRight = lp.rightMargin; 3595 3596 mSuggestionListView = (ListView) mContentView.findViewById( 3597 com.android.internal.R.id.suggestionContainer); 3598 3599 mSuggestionsAdapter = new SuggestionAdapter(); 3600 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3601 mSuggestionListView.setOnItemClickListener(this); 3602 3603 // Inflate the suggestion items once and for all. 3604 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3605 for (int i = 0; i < mSuggestionInfos.length; i++) { 3606 mSuggestionInfos[i] = new SuggestionInfo(); 3607 } 3608 3609 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3610 com.android.internal.R.id.addToDictionaryButton); 3611 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3612 public void onClick(View v) { 3613 final SuggestionSpan misspelledSpan = 3614 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3615 if (misspelledSpan == null) { 3616 // Span has been removed. 3617 return; 3618 } 3619 final Editable editable = (Editable) mTextView.getText(); 3620 final int spanStart = editable.getSpanStart(misspelledSpan); 3621 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3622 if (spanStart < 0 || spanEnd <= spanStart) { 3623 return; 3624 } 3625 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3626 3627 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3628 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3629 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3630 mTextView.getTextServicesLocale().toString()); 3631 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3632 mTextView.getContext().startActivity(intent); 3633 // There is no way to know if the word was indeed added. Re-check. 3634 // TODO The ExtractEditText should remove the span in the original text instead 3635 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3636 Selection.setSelection(editable, spanEnd); 3637 updateSpellCheckSpans(spanStart, spanEnd, false); 3638 hideWithCleanUp(); 3639 } 3640 }); 3641 3642 mDeleteButton = (TextView) mContentView.findViewById( 3643 com.android.internal.R.id.deleteButton); 3644 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3645 public void onClick(View v) { 3646 final Editable editable = (Editable) mTextView.getText(); 3647 3648 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3649 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3650 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3651 // Do not leave two adjacent spaces after deletion, or one at beginning of 3652 // text 3653 if (spanUnionEnd < editable.length() 3654 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3655 && (spanUnionStart == 0 3656 || Character.isSpaceChar( 3657 editable.charAt(spanUnionStart - 1)))) { 3658 spanUnionEnd = spanUnionEnd + 1; 3659 } 3660 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3661 } 3662 hideWithCleanUp(); 3663 } 3664 }); 3665 3666 } 3667 3668 public boolean isShowingUp() { 3669 return mIsShowingUp; 3670 } 3671 3672 public void onParentLostFocus() { 3673 mIsShowingUp = false; 3674 } 3675 3676 private class SuggestionAdapter extends BaseAdapter { 3677 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3678 Context.LAYOUT_INFLATER_SERVICE); 3679 3680 @Override 3681 public int getCount() { 3682 return mNumberOfSuggestions; 3683 } 3684 3685 @Override 3686 public Object getItem(int position) { 3687 return mSuggestionInfos[position]; 3688 } 3689 3690 @Override 3691 public long getItemId(int position) { 3692 return position; 3693 } 3694 3695 @Override 3696 public View getView(int position, View convertView, ViewGroup parent) { 3697 TextView textView = (TextView) convertView; 3698 3699 if (textView == null) { 3700 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3701 parent, false); 3702 } 3703 3704 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3705 textView.setText(suggestionInfo.mText); 3706 return textView; 3707 } 3708 } 3709 3710 @VisibleForTesting 3711 public ViewGroup getContentViewForTesting() { 3712 return mContentView; 3713 } 3714 3715 @Override 3716 public void show() { 3717 if (!(mTextView.getText() instanceof Editable)) return; 3718 if (extractedTextModeWillBeStarted()) { 3719 return; 3720 } 3721 3722 if (updateSuggestions()) { 3723 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3724 mTextView.setCursorVisible(false); 3725 mIsShowingUp = true; 3726 super.show(); 3727 } 3728 3729 mSuggestionListView.setVisibility(mNumberOfSuggestions == 0 ? View.GONE : View.VISIBLE); 3730 } 3731 3732 @Override 3733 protected void measureContent() { 3734 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3735 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3736 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3737 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3738 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3739 3740 int width = 0; 3741 View view = null; 3742 for (int i = 0; i < mNumberOfSuggestions; i++) { 3743 view = mSuggestionsAdapter.getView(i, view, mContentView); 3744 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3745 view.measure(horizontalMeasure, verticalMeasure); 3746 width = Math.max(width, view.getMeasuredWidth()); 3747 } 3748 3749 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3750 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3751 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3752 } 3753 3754 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3755 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3756 3757 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3758 + mContainerMarginWidth; 3759 3760 // Enforce the width based on actual text widths 3761 mContentView.measure( 3762 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3763 verticalMeasure); 3764 3765 Drawable popupBackground = mPopupWindow.getBackground(); 3766 if (popupBackground != null) { 3767 if (mTempRect == null) mTempRect = new Rect(); 3768 popupBackground.getPadding(mTempRect); 3769 width += mTempRect.left + mTempRect.right; 3770 } 3771 mPopupWindow.setWidth(width); 3772 } 3773 3774 @Override 3775 protected int getTextOffset() { 3776 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3777 } 3778 3779 @Override 3780 protected int getVerticalLocalPosition(int line) { 3781 final Layout layout = mTextView.getLayout(); 3782 return layout.getLineBottomWithoutSpacing(line) - mContainerMarginTop; 3783 } 3784 3785 @Override 3786 protected int clipVertically(int positionY) { 3787 final int height = mContentView.getMeasuredHeight(); 3788 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3789 return Math.min(positionY, displayMetrics.heightPixels - height); 3790 } 3791 3792 private void hideWithCleanUp() { 3793 for (final SuggestionInfo info : mSuggestionInfos) { 3794 info.clear(); 3795 } 3796 mMisspelledSpanInfo.clear(); 3797 hide(); 3798 } 3799 3800 private boolean updateSuggestions() { 3801 Spannable spannable = (Spannable) mTextView.getText(); 3802 mNumberOfSuggestions = 3803 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3804 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3805 return false; 3806 } 3807 3808 int spanUnionStart = mTextView.getText().length(); 3809 int spanUnionEnd = 0; 3810 3811 for (int i = 0; i < mNumberOfSuggestions; i++) { 3812 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3813 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3814 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3815 } 3816 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3817 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3818 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3819 } 3820 3821 for (int i = 0; i < mNumberOfSuggestions; i++) { 3822 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3823 } 3824 3825 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3826 int addToDictionaryButtonVisibility = View.GONE; 3827 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3828 if (mMisspelledSpanInfo.mSpanStart >= 0 3829 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3830 addToDictionaryButtonVisibility = View.VISIBLE; 3831 } 3832 } 3833 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3834 3835 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3836 final int underlineColor; 3837 if (mNumberOfSuggestions != 0) { 3838 underlineColor = 3839 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3840 } else { 3841 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3842 } 3843 3844 if (underlineColor == 0) { 3845 // Fallback on the default highlight color when the first span does not provide one 3846 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3847 } else { 3848 final float BACKGROUND_TRANSPARENCY = 0.4f; 3849 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3850 mSuggestionRangeSpan.setBackgroundColor( 3851 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3852 } 3853 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3854 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3855 3856 mSuggestionsAdapter.notifyDataSetChanged(); 3857 return true; 3858 } 3859 3860 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3861 int unionEnd) { 3862 final Spannable text = (Spannable) mTextView.getText(); 3863 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3864 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3865 3866 // Adjust the start/end of the suggestion span 3867 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3868 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3869 + suggestionInfo.mText.length(); 3870 3871 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3872 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3873 3874 // Add the text before and after the span. 3875 final String textAsString = text.toString(); 3876 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3877 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3878 } 3879 3880 @Override 3881 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3882 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3883 replaceWithSuggestion(suggestionInfo); 3884 hideWithCleanUp(); 3885 } 3886 } 3887 3888 /** 3889 * An ActionMode Callback class that is used to provide actions while in text insertion or 3890 * selection mode. 3891 * 3892 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3893 * actions, depending on which of these this TextView supports and the current selection. 3894 */ 3895 private class TextActionModeCallback extends ActionMode.Callback2 { 3896 private final Path mSelectionPath = new Path(); 3897 private final RectF mSelectionBounds = new RectF(); 3898 private final boolean mHasSelection; 3899 private final int mHandleHeight; 3900 private final Map<MenuItem, OnClickListener> mAssistClickHandlers = new HashMap<>(); 3901 3902 TextActionModeCallback(@TextActionMode int mode) { 3903 mHasSelection = mode == TextActionMode.SELECTION 3904 || (mTextIsSelectable && mode == TextActionMode.TEXT_LINK); 3905 if (mHasSelection) { 3906 SelectionModifierCursorController selectionController = getSelectionController(); 3907 if (selectionController.mStartHandle == null) { 3908 // As these are for initializing selectionController, hide() must be called. 3909 selectionController.initDrawables(); 3910 selectionController.initHandles(); 3911 selectionController.hide(); 3912 } 3913 mHandleHeight = Math.max( 3914 mSelectHandleLeft.getMinimumHeight(), 3915 mSelectHandleRight.getMinimumHeight()); 3916 } else { 3917 InsertionPointCursorController insertionController = getInsertionController(); 3918 if (insertionController != null) { 3919 insertionController.getHandle(); 3920 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3921 } else { 3922 mHandleHeight = 0; 3923 } 3924 } 3925 } 3926 3927 @Override 3928 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3929 mAssistClickHandlers.clear(); 3930 3931 mode.setTitle(null); 3932 mode.setSubtitle(null); 3933 mode.setTitleOptionalHint(true); 3934 populateMenuWithItems(menu); 3935 3936 Callback customCallback = getCustomCallback(); 3937 if (customCallback != null) { 3938 if (!customCallback.onCreateActionMode(mode, menu)) { 3939 // The custom mode can choose to cancel the action mode, dismiss selection. 3940 Selection.setSelection((Spannable) mTextView.getText(), 3941 mTextView.getSelectionEnd()); 3942 return false; 3943 } 3944 } 3945 3946 if (mTextView.canProcessText()) { 3947 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3948 } 3949 3950 if (mHasSelection && !mTextView.hasTransientState()) { 3951 mTextView.setHasTransientState(true); 3952 } 3953 return true; 3954 } 3955 3956 private Callback getCustomCallback() { 3957 return mHasSelection 3958 ? mCustomSelectionActionModeCallback 3959 : mCustomInsertionActionModeCallback; 3960 } 3961 3962 private void populateMenuWithItems(Menu menu) { 3963 if (mTextView.canCut()) { 3964 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3965 com.android.internal.R.string.cut) 3966 .setAlphabeticShortcut('x') 3967 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3968 } 3969 3970 if (mTextView.canCopy()) { 3971 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3972 com.android.internal.R.string.copy) 3973 .setAlphabeticShortcut('c') 3974 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3975 } 3976 3977 if (mTextView.canPaste()) { 3978 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3979 com.android.internal.R.string.paste) 3980 .setAlphabeticShortcut('v') 3981 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3982 } 3983 3984 if (mTextView.canShare()) { 3985 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3986 com.android.internal.R.string.share) 3987 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3988 } 3989 3990 if (mTextView.canRequestAutofill()) { 3991 final String selected = mTextView.getSelectedText(); 3992 if (selected == null || selected.isEmpty()) { 3993 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3994 com.android.internal.R.string.autofill) 3995 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 3996 } 3997 } 3998 3999 if (mTextView.canPasteAsPlainText()) { 4000 menu.add( 4001 Menu.NONE, 4002 TextView.ID_PASTE_AS_PLAIN_TEXT, 4003 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 4004 com.android.internal.R.string.paste_as_plain_text) 4005 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 4006 } 4007 4008 updateSelectAllItem(menu); 4009 updateReplaceItem(menu); 4010 updateAssistMenuItems(menu); 4011 } 4012 4013 @Override 4014 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 4015 updateSelectAllItem(menu); 4016 updateReplaceItem(menu); 4017 updateAssistMenuItems(menu); 4018 4019 Callback customCallback = getCustomCallback(); 4020 if (customCallback != null) { 4021 return customCallback.onPrepareActionMode(mode, menu); 4022 } 4023 return true; 4024 } 4025 4026 private void updateSelectAllItem(Menu menu) { 4027 boolean canSelectAll = mTextView.canSelectAllText(); 4028 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 4029 if (canSelectAll && !selectAllItemExists) { 4030 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 4031 com.android.internal.R.string.selectAll) 4032 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 4033 } else if (!canSelectAll && selectAllItemExists) { 4034 menu.removeItem(TextView.ID_SELECT_ALL); 4035 } 4036 } 4037 4038 private void updateReplaceItem(Menu menu) { 4039 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 4040 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 4041 if (canReplace && !replaceItemExists) { 4042 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 4043 com.android.internal.R.string.replace) 4044 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 4045 } else if (!canReplace && replaceItemExists) { 4046 menu.removeItem(TextView.ID_REPLACE); 4047 } 4048 } 4049 4050 private void updateAssistMenuItems(Menu menu) { 4051 clearAssistMenuItems(menu); 4052 if (!shouldEnableAssistMenuItems()) { 4053 return; 4054 } 4055 final TextClassification textClassification = 4056 getSelectionActionModeHelper().getTextClassification(); 4057 if (textClassification == null) { 4058 return; 4059 } 4060 if (!textClassification.getActions().isEmpty()) { 4061 // Primary assist action (Always shown). 4062 final MenuItem item = addAssistMenuItem(menu, 4063 textClassification.getActions().get(0), TextView.ID_ASSIST, 4064 MENU_ITEM_ORDER_ASSIST, MenuItem.SHOW_AS_ACTION_ALWAYS); 4065 item.setIntent(textClassification.getIntent()); 4066 } else if (hasLegacyAssistItem(textClassification)) { 4067 // Legacy primary assist action (Always shown). 4068 final MenuItem item = menu.add( 4069 TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, 4070 textClassification.getLabel()) 4071 .setIcon(textClassification.getIcon()) 4072 .setIntent(textClassification.getIntent()); 4073 item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 4074 mAssistClickHandlers.put(item, TextClassification.createIntentOnClickListener( 4075 TextClassification.createPendingIntent(mTextView.getContext(), 4076 textClassification.getIntent(), 4077 createAssistMenuItemPendingIntentRequestCode()))); 4078 } 4079 final int count = textClassification.getActions().size(); 4080 for (int i = 1; i < count; i++) { 4081 // Secondary assist action (Never shown). 4082 addAssistMenuItem(menu, textClassification.getActions().get(i), Menu.NONE, 4083 MENU_ITEM_ORDER_SECONDARY_ASSIST_ACTIONS_START + i - 1, 4084 MenuItem.SHOW_AS_ACTION_NEVER); 4085 } 4086 } 4087 4088 private MenuItem addAssistMenuItem(Menu menu, RemoteAction action, int intemId, int order, 4089 int showAsAction) { 4090 final MenuItem item = menu.add(TextView.ID_ASSIST, intemId, order, action.getTitle()) 4091 .setContentDescription(action.getContentDescription()); 4092 if (action.shouldShowIcon()) { 4093 item.setIcon(action.getIcon().loadDrawable(mTextView.getContext())); 4094 } 4095 item.setShowAsAction(showAsAction); 4096 mAssistClickHandlers.put(item, 4097 TextClassification.createIntentOnClickListener(action.getActionIntent())); 4098 return item; 4099 } 4100 4101 private void clearAssistMenuItems(Menu menu) { 4102 int i = 0; 4103 while (i < menu.size()) { 4104 final MenuItem menuItem = menu.getItem(i); 4105 if (menuItem.getGroupId() == TextView.ID_ASSIST) { 4106 menu.removeItem(menuItem.getItemId()); 4107 continue; 4108 } 4109 i++; 4110 } 4111 } 4112 4113 private boolean hasLegacyAssistItem(TextClassification classification) { 4114 // Check whether we have the UI data and and action. 4115 return (classification.getIcon() != null || !TextUtils.isEmpty( 4116 classification.getLabel())) && (classification.getIntent() != null 4117 || classification.getOnClickListener() != null); 4118 } 4119 4120 private boolean onAssistMenuItemClicked(MenuItem assistMenuItem) { 4121 Preconditions.checkArgument(assistMenuItem.getGroupId() == TextView.ID_ASSIST); 4122 4123 final TextClassification textClassification = 4124 getSelectionActionModeHelper().getTextClassification(); 4125 if (!shouldEnableAssistMenuItems() || textClassification == null) { 4126 // No textClassification result to handle the click. Eat the click. 4127 return true; 4128 } 4129 4130 OnClickListener onClickListener = mAssistClickHandlers.get(assistMenuItem); 4131 if (onClickListener == null) { 4132 final Intent intent = assistMenuItem.getIntent(); 4133 if (intent != null) { 4134 onClickListener = TextClassification.createIntentOnClickListener( 4135 TextClassification.createPendingIntent( 4136 mTextView.getContext(), intent, 4137 createAssistMenuItemPendingIntentRequestCode())); 4138 } 4139 } 4140 if (onClickListener != null) { 4141 onClickListener.onClick(mTextView); 4142 stopTextActionMode(); 4143 } 4144 // We tried our best. 4145 return true; 4146 } 4147 4148 private int createAssistMenuItemPendingIntentRequestCode() { 4149 return mTextView.hasSelection() 4150 ? mTextView.getText().subSequence( 4151 mTextView.getSelectionStart(), mTextView.getSelectionEnd()) 4152 .hashCode() 4153 : 0; 4154 } 4155 4156 private boolean shouldEnableAssistMenuItems() { 4157 return mTextView.isDeviceProvisioned() 4158 && TextClassificationManager.getSettings(mTextView.getContext()) 4159 .isSmartTextShareEnabled(); 4160 } 4161 4162 @Override 4163 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 4164 getSelectionActionModeHelper().onSelectionAction(item.getItemId()); 4165 4166 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 4167 return true; 4168 } 4169 Callback customCallback = getCustomCallback(); 4170 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 4171 return true; 4172 } 4173 if (item.getGroupId() == TextView.ID_ASSIST && onAssistMenuItemClicked(item)) { 4174 return true; 4175 } 4176 return mTextView.onTextContextMenuItem(item.getItemId()); 4177 } 4178 4179 @Override 4180 public void onDestroyActionMode(ActionMode mode) { 4181 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 4182 getSelectionActionModeHelper().onDestroyActionMode(); 4183 mTextActionMode = null; 4184 Callback customCallback = getCustomCallback(); 4185 if (customCallback != null) { 4186 customCallback.onDestroyActionMode(mode); 4187 } 4188 4189 if (!mPreserveSelection) { 4190 /* 4191 * Leave current selection when we tentatively destroy action mode for the 4192 * selection. If we're detaching from a window, we'll bring back the selection 4193 * mode when (if) we get reattached. 4194 */ 4195 Selection.setSelection((Spannable) mTextView.getText(), 4196 mTextView.getSelectionEnd()); 4197 } 4198 4199 if (mSelectionModifierCursorController != null) { 4200 mSelectionModifierCursorController.hide(); 4201 } 4202 4203 mAssistClickHandlers.clear(); 4204 mRequestingLinkActionMode = false; 4205 } 4206 4207 @Override 4208 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 4209 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 4210 super.onGetContentRect(mode, view, outRect); 4211 return; 4212 } 4213 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 4214 // We have a selection. 4215 mSelectionPath.reset(); 4216 mTextView.getLayout().getSelectionPath( 4217 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 4218 mSelectionPath.computeBounds(mSelectionBounds, true); 4219 mSelectionBounds.bottom += mHandleHeight; 4220 } else { 4221 // We have a cursor. 4222 Layout layout = mTextView.getLayout(); 4223 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4224 float primaryHorizontal = clampHorizontalPosition(null, 4225 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4226 mSelectionBounds.set( 4227 primaryHorizontal, 4228 layout.getLineTop(line), 4229 primaryHorizontal, 4230 layout.getLineBottom(line) + mHandleHeight); 4231 } 4232 // Take TextView's padding and scroll into account. 4233 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4234 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4235 outRect.set( 4236 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4237 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4238 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4239 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4240 } 4241 } 4242 4243 /** 4244 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4245 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4246 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4247 */ 4248 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4249 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4250 final int[] mTmpIntOffset = new int[2]; 4251 final Matrix mViewToScreenMatrix = new Matrix(); 4252 4253 @Override 4254 public void updatePosition(int parentPositionX, int parentPositionY, 4255 boolean parentPositionChanged, boolean parentScrolled) { 4256 final InputMethodState ims = mInputMethodState; 4257 if (ims == null || ims.mBatchEditNesting > 0) { 4258 return; 4259 } 4260 final InputMethodManager imm = InputMethodManager.peekInstance(); 4261 if (null == imm) { 4262 return; 4263 } 4264 if (!imm.isActive(mTextView)) { 4265 return; 4266 } 4267 // Skip if the IME has not requested the cursor/anchor position. 4268 if (!imm.isCursorAnchorInfoEnabled()) { 4269 return; 4270 } 4271 Layout layout = mTextView.getLayout(); 4272 if (layout == null) { 4273 return; 4274 } 4275 4276 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4277 builder.reset(); 4278 4279 final int selectionStart = mTextView.getSelectionStart(); 4280 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4281 4282 // Construct transformation matrix from view local coordinates to screen coordinates. 4283 mViewToScreenMatrix.set(mTextView.getMatrix()); 4284 mTextView.getLocationOnScreen(mTmpIntOffset); 4285 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4286 builder.setMatrix(mViewToScreenMatrix); 4287 4288 final float viewportToContentHorizontalOffset = 4289 mTextView.viewportToContentHorizontalOffset(); 4290 final float viewportToContentVerticalOffset = 4291 mTextView.viewportToContentVerticalOffset(); 4292 4293 final CharSequence text = mTextView.getText(); 4294 if (text instanceof Spannable) { 4295 final Spannable sp = (Spannable) text; 4296 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4297 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4298 if (composingTextEnd < composingTextStart) { 4299 final int temp = composingTextEnd; 4300 composingTextEnd = composingTextStart; 4301 composingTextStart = temp; 4302 } 4303 final boolean hasComposingText = 4304 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4305 if (hasComposingText) { 4306 final CharSequence composingText = text.subSequence(composingTextStart, 4307 composingTextEnd); 4308 builder.setComposingText(composingTextStart, composingText); 4309 mTextView.populateCharacterBounds(builder, composingTextStart, 4310 composingTextEnd, viewportToContentHorizontalOffset, 4311 viewportToContentVerticalOffset); 4312 } 4313 } 4314 4315 // Treat selectionStart as the insertion point. 4316 if (0 <= selectionStart) { 4317 final int offset = selectionStart; 4318 final int line = layout.getLineForOffset(offset); 4319 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4320 + viewportToContentHorizontalOffset; 4321 final float insertionMarkerTop = layout.getLineTop(line) 4322 + viewportToContentVerticalOffset; 4323 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4324 + viewportToContentVerticalOffset; 4325 final float insertionMarkerBottom = layout.getLineBottomWithoutSpacing(line) 4326 + viewportToContentVerticalOffset; 4327 final boolean isTopVisible = mTextView 4328 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4329 final boolean isBottomVisible = mTextView 4330 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4331 int insertionMarkerFlags = 0; 4332 if (isTopVisible || isBottomVisible) { 4333 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4334 } 4335 if (!isTopVisible || !isBottomVisible) { 4336 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4337 } 4338 if (layout.isRtlCharAt(offset)) { 4339 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4340 } 4341 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4342 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4343 } 4344 4345 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4346 } 4347 } 4348 4349 private static class MagnifierMotionAnimator { 4350 private static final long DURATION = 100 /* miliseconds */; 4351 4352 // The magnifier being animated. 4353 private final Magnifier mMagnifier; 4354 // A value animator used to animate the magnifier. 4355 private final ValueAnimator mAnimator; 4356 4357 // Whether the magnifier is currently visible. 4358 private boolean mMagnifierIsShowing; 4359 // The coordinates of the magnifier when the currently running animation started. 4360 private float mAnimationStartX; 4361 private float mAnimationStartY; 4362 // The coordinates of the magnifier in the latest animation frame. 4363 private float mAnimationCurrentX; 4364 private float mAnimationCurrentY; 4365 // The latest coordinates the motion animator was asked to #show() the magnifier at. 4366 private float mLastX; 4367 private float mLastY; 4368 4369 private MagnifierMotionAnimator(final Magnifier magnifier) { 4370 mMagnifier = magnifier; 4371 // Prepare the animator used to run the motion animation. 4372 mAnimator = ValueAnimator.ofFloat(0, 1); 4373 mAnimator.setDuration(DURATION); 4374 mAnimator.setInterpolator(new LinearInterpolator()); 4375 mAnimator.addUpdateListener((animation) -> { 4376 // Interpolate to find the current position of the magnifier. 4377 mAnimationCurrentX = mAnimationStartX 4378 + (mLastX - mAnimationStartX) * animation.getAnimatedFraction(); 4379 mAnimationCurrentY = mAnimationStartY 4380 + (mLastY - mAnimationStartY) * animation.getAnimatedFraction(); 4381 mMagnifier.show(mAnimationCurrentX, mAnimationCurrentY); 4382 }); 4383 } 4384 4385 /** 4386 * Shows the magnifier at a new position. 4387 * If the y coordinate is different from the previous y coordinate 4388 * (probably corresponding to a line jump in the text), a short 4389 * animation is added to the jump. 4390 */ 4391 private void show(final float x, final float y) { 4392 final boolean startNewAnimation = mMagnifierIsShowing && y != mLastY; 4393 4394 if (startNewAnimation) { 4395 if (mAnimator.isRunning()) { 4396 mAnimator.cancel(); 4397 mAnimationStartX = mAnimationCurrentX; 4398 mAnimationStartY = mAnimationCurrentY; 4399 } else { 4400 mAnimationStartX = mLastX; 4401 mAnimationStartY = mLastY; 4402 } 4403 mAnimator.start(); 4404 } else { 4405 if (!mAnimator.isRunning()) { 4406 mMagnifier.show(x, y); 4407 } 4408 } 4409 mLastX = x; 4410 mLastY = y; 4411 mMagnifierIsShowing = true; 4412 } 4413 4414 /** 4415 * Updates the content of the magnifier. 4416 */ 4417 private void update() { 4418 mMagnifier.update(); 4419 } 4420 4421 /** 4422 * Dismisses the magnifier, or does nothing if it is already dismissed. 4423 */ 4424 private void dismiss() { 4425 mMagnifier.dismiss(); 4426 mAnimator.cancel(); 4427 mMagnifierIsShowing = false; 4428 } 4429 } 4430 4431 @VisibleForTesting 4432 public abstract class HandleView extends View implements TextViewPositionListener { 4433 protected Drawable mDrawable; 4434 protected Drawable mDrawableLtr; 4435 protected Drawable mDrawableRtl; 4436 private final PopupWindow mContainer; 4437 // Position with respect to the parent TextView 4438 private int mPositionX, mPositionY; 4439 private boolean mIsDragging; 4440 // Offset from touch position to mPosition 4441 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4442 protected int mHotspotX; 4443 protected int mHorizontalGravity; 4444 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4445 private float mTouchOffsetY; 4446 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4447 private float mIdealVerticalOffset; 4448 // Parent's (TextView) previous position in window 4449 private int mLastParentX, mLastParentY; 4450 // Parent's (TextView) previous position on screen 4451 private int mLastParentXOnScreen, mLastParentYOnScreen; 4452 // Previous text character offset 4453 protected int mPreviousOffset = -1; 4454 // Previous text character offset 4455 private boolean mPositionHasChanged = true; 4456 // Minimum touch target size for handles 4457 private int mMinSize; 4458 // Indicates the line of text that the handle is on. 4459 protected int mPrevLine = UNSET_LINE; 4460 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4461 // when selecting text when the handles jump to the end / start of words which may be on 4462 // a different line. 4463 protected int mPreviousLineTouched = UNSET_LINE; 4464 4465 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4466 super(mTextView.getContext()); 4467 setId(id); 4468 mContainer = new PopupWindow(mTextView.getContext(), null, 4469 com.android.internal.R.attr.textSelectHandleWindowStyle); 4470 mContainer.setSplitTouchEnabled(true); 4471 mContainer.setClippingEnabled(false); 4472 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4473 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4474 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4475 mContainer.setContentView(this); 4476 4477 mDrawableLtr = drawableLtr; 4478 mDrawableRtl = drawableRtl; 4479 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4480 com.android.internal.R.dimen.text_handle_min_size); 4481 4482 updateDrawable(); 4483 4484 final int handleHeight = getPreferredHeight(); 4485 mTouchOffsetY = -0.3f * handleHeight; 4486 mIdealVerticalOffset = 0.7f * handleHeight; 4487 } 4488 4489 public float getIdealVerticalOffset() { 4490 return mIdealVerticalOffset; 4491 } 4492 4493 protected void updateDrawable() { 4494 if (mIsDragging) { 4495 // Don't update drawable during dragging. 4496 return; 4497 } 4498 final Layout layout = mTextView.getLayout(); 4499 if (layout == null) { 4500 return; 4501 } 4502 final int offset = getCurrentCursorOffset(); 4503 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4504 final Drawable oldDrawable = mDrawable; 4505 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4506 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4507 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4508 if (oldDrawable != mDrawable && isShowing()) { 4509 // Update popup window position. 4510 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4511 - getHorizontalOffset() + getCursorOffset(); 4512 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4513 mPositionHasChanged = true; 4514 updatePosition(mLastParentX, mLastParentY, false, false); 4515 postInvalidate(); 4516 } 4517 } 4518 4519 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4520 protected abstract int getHorizontalGravity(boolean isRtlRun); 4521 4522 // Touch-up filter: number of previous positions remembered 4523 private static final int HISTORY_SIZE = 5; 4524 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4525 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4526 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4527 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4528 private int mPreviousOffsetIndex = 0; 4529 private int mNumberPreviousOffsets = 0; 4530 4531 private void startTouchUpFilter(int offset) { 4532 mNumberPreviousOffsets = 0; 4533 addPositionToTouchUpFilter(offset); 4534 } 4535 4536 private void addPositionToTouchUpFilter(int offset) { 4537 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4538 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4539 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4540 mNumberPreviousOffsets++; 4541 } 4542 4543 private void filterOnTouchUp(boolean fromTouchScreen) { 4544 final long now = SystemClock.uptimeMillis(); 4545 int i = 0; 4546 int index = mPreviousOffsetIndex; 4547 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4548 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4549 i++; 4550 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4551 } 4552 4553 if (i > 0 && i < iMax 4554 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4555 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4556 } 4557 } 4558 4559 public boolean offsetHasBeenChanged() { 4560 return mNumberPreviousOffsets > 1; 4561 } 4562 4563 @Override 4564 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4565 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4566 } 4567 4568 @Override 4569 public void invalidate() { 4570 super.invalidate(); 4571 if (isShowing()) { 4572 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4573 } 4574 }; 4575 4576 private int getPreferredWidth() { 4577 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4578 } 4579 4580 private int getPreferredHeight() { 4581 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4582 } 4583 4584 public void show() { 4585 if (isShowing()) return; 4586 4587 getPositionListener().addSubscriber(this, true /* local position may change */); 4588 4589 // Make sure the offset is always considered new, even when focusing at same position 4590 mPreviousOffset = -1; 4591 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4592 } 4593 4594 protected void dismiss() { 4595 mIsDragging = false; 4596 mContainer.dismiss(); 4597 onDetached(); 4598 } 4599 4600 public void hide() { 4601 dismiss(); 4602 4603 getPositionListener().removeSubscriber(this); 4604 } 4605 4606 public boolean isShowing() { 4607 return mContainer.isShowing(); 4608 } 4609 4610 private boolean shouldShow() { 4611 // A dragging handle should always be shown. 4612 if (mIsDragging) { 4613 return true; 4614 } 4615 4616 if (mTextView.isInBatchEditMode()) { 4617 return false; 4618 } 4619 4620 return mTextView.isPositionVisible( 4621 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4622 } 4623 4624 private void setVisible(final boolean visible) { 4625 mContainer.getContentView().setVisibility(visible ? VISIBLE : INVISIBLE); 4626 } 4627 4628 public abstract int getCurrentCursorOffset(); 4629 4630 protected abstract void updateSelection(int offset); 4631 4632 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4633 4634 @MagnifierHandleTrigger 4635 protected abstract int getMagnifierHandleTrigger(); 4636 4637 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4638 return layout.isRtlCharAt(offset); 4639 } 4640 4641 @VisibleForTesting 4642 public float getHorizontal(@NonNull Layout layout, int offset) { 4643 return layout.getPrimaryHorizontal(offset); 4644 } 4645 4646 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4647 return mTextView.getOffsetAtCoordinate(line, x); 4648 } 4649 4650 /** 4651 * @param offset Cursor offset. Must be in [-1, length]. 4652 * @param forceUpdatePosition whether to force update the position. This should be true 4653 * when If the parent has been scrolled, for example. 4654 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4655 * touch screen. 4656 */ 4657 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4658 boolean fromTouchScreen) { 4659 // A HandleView relies on the layout, which may be nulled by external methods 4660 Layout layout = mTextView.getLayout(); 4661 if (layout == null) { 4662 // Will update controllers' state, hiding them and stopping selection mode if needed 4663 prepareCursorControllers(); 4664 return; 4665 } 4666 layout = mTextView.getLayout(); 4667 4668 boolean offsetChanged = offset != mPreviousOffset; 4669 if (offsetChanged || forceUpdatePosition) { 4670 if (offsetChanged) { 4671 updateSelection(offset); 4672 if (fromTouchScreen && mHapticTextHandleEnabled) { 4673 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4674 } 4675 addPositionToTouchUpFilter(offset); 4676 } 4677 final int line = layout.getLineForOffset(offset); 4678 mPrevLine = line; 4679 4680 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4681 - getHorizontalOffset() + getCursorOffset(); 4682 mPositionY = layout.getLineBottomWithoutSpacing(line); 4683 4684 // Take TextView's padding and scroll into account. 4685 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4686 mPositionY += mTextView.viewportToContentVerticalOffset(); 4687 4688 mPreviousOffset = offset; 4689 mPositionHasChanged = true; 4690 } 4691 } 4692 4693 /** 4694 * Return the clamped horizontal position for the cursor. 4695 * 4696 * @param layout Text layout. 4697 * @param offset Character offset for the cursor. 4698 * @return The clamped horizontal position for the cursor. 4699 */ 4700 int getCursorHorizontalPosition(Layout layout, int offset) { 4701 return (int) (getHorizontal(layout, offset) - 0.5f); 4702 } 4703 4704 @Override 4705 public void updatePosition(int parentPositionX, int parentPositionY, 4706 boolean parentPositionChanged, boolean parentScrolled) { 4707 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4708 if (parentPositionChanged || mPositionHasChanged) { 4709 if (mIsDragging) { 4710 // Update touchToWindow offset in case of parent scrolling while dragging 4711 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4712 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4713 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4714 mLastParentX = parentPositionX; 4715 mLastParentY = parentPositionY; 4716 } 4717 4718 onHandleMoved(); 4719 } 4720 4721 if (shouldShow()) { 4722 // Transform to the window coordinates to follow the view tranformation. 4723 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4724 mTextView.transformFromViewToWindowSpace(pts); 4725 pts[0] -= mHotspotX + getHorizontalOffset(); 4726 4727 if (isShowing()) { 4728 mContainer.update(pts[0], pts[1], -1, -1); 4729 } else { 4730 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4731 } 4732 } else { 4733 if (isShowing()) { 4734 dismiss(); 4735 } 4736 } 4737 4738 mPositionHasChanged = false; 4739 } 4740 } 4741 4742 @Override 4743 protected void onDraw(Canvas c) { 4744 final int drawWidth = mDrawable.getIntrinsicWidth(); 4745 final int left = getHorizontalOffset(); 4746 4747 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4748 mDrawable.draw(c); 4749 } 4750 4751 private int getHorizontalOffset() { 4752 final int width = getPreferredWidth(); 4753 final int drawWidth = mDrawable.getIntrinsicWidth(); 4754 final int left; 4755 switch (mHorizontalGravity) { 4756 case Gravity.LEFT: 4757 left = 0; 4758 break; 4759 default: 4760 case Gravity.CENTER: 4761 left = (width - drawWidth) / 2; 4762 break; 4763 case Gravity.RIGHT: 4764 left = width - drawWidth; 4765 break; 4766 } 4767 return left; 4768 } 4769 4770 protected int getCursorOffset() { 4771 return 0; 4772 } 4773 4774 private boolean tooLargeTextForMagnifier() { 4775 final float magnifierContentHeight = Math.round( 4776 mMagnifierAnimator.mMagnifier.getHeight() 4777 / mMagnifierAnimator.mMagnifier.getZoom()); 4778 final Paint.FontMetrics fontMetrics = mTextView.getPaint().getFontMetrics(); 4779 final float glyphHeight = fontMetrics.descent - fontMetrics.ascent; 4780 return glyphHeight > magnifierContentHeight; 4781 } 4782 4783 /** 4784 * Computes the position where the magnifier should be shown, relative to 4785 * {@code mTextView}, and writes them to {@code showPosInView}. Also decides 4786 * whether the magnifier should be shown or dismissed after this touch event. 4787 * @return Whether the magnifier should be shown at the computed coordinates or dismissed. 4788 */ 4789 private boolean obtainMagnifierShowCoordinates(@NonNull final MotionEvent event, 4790 final PointF showPosInView) { 4791 4792 final int trigger = getMagnifierHandleTrigger(); 4793 final int offset; 4794 final int otherHandleOffset; 4795 switch (trigger) { 4796 case MagnifierHandleTrigger.INSERTION: 4797 offset = mTextView.getSelectionStart(); 4798 otherHandleOffset = -1; 4799 break; 4800 case MagnifierHandleTrigger.SELECTION_START: 4801 offset = mTextView.getSelectionStart(); 4802 otherHandleOffset = mTextView.getSelectionEnd(); 4803 break; 4804 case MagnifierHandleTrigger.SELECTION_END: 4805 offset = mTextView.getSelectionEnd(); 4806 otherHandleOffset = mTextView.getSelectionStart(); 4807 break; 4808 default: 4809 offset = -1; 4810 otherHandleOffset = -1; 4811 break; 4812 } 4813 4814 if (offset == -1) { 4815 return false; 4816 } 4817 4818 final Layout layout = mTextView.getLayout(); 4819 final int lineNumber = layout.getLineForOffset(offset); 4820 // Compute whether the selection handles are currently on the same line, and, 4821 // in this particular case, whether the selected text is right to left. 4822 final boolean sameLineSelection = otherHandleOffset != -1 4823 && lineNumber == layout.getLineForOffset(otherHandleOffset); 4824 final boolean rtl = sameLineSelection 4825 && (offset < otherHandleOffset) 4826 != (getHorizontal(mTextView.getLayout(), offset) 4827 < getHorizontal(mTextView.getLayout(), otherHandleOffset)); 4828 4829 // Horizontally move the magnifier smoothly, clamp inside the current line / selection. 4830 final int[] textViewLocationOnScreen = new int[2]; 4831 mTextView.getLocationOnScreen(textViewLocationOnScreen); 4832 final float touchXInView = event.getRawX() - textViewLocationOnScreen[0]; 4833 float leftBound = mTextView.getTotalPaddingLeft() - mTextView.getScrollX(); 4834 float rightBound = mTextView.getTotalPaddingLeft() - mTextView.getScrollX(); 4835 if (sameLineSelection && ((trigger == MagnifierHandleTrigger.SELECTION_END) ^ rtl)) { 4836 leftBound += getHorizontal(mTextView.getLayout(), otherHandleOffset); 4837 } else { 4838 leftBound += mTextView.getLayout().getLineLeft(lineNumber); 4839 } 4840 if (sameLineSelection && ((trigger == MagnifierHandleTrigger.SELECTION_START) ^ rtl)) { 4841 rightBound += getHorizontal(mTextView.getLayout(), otherHandleOffset); 4842 } else { 4843 rightBound += mTextView.getLayout().getLineRight(lineNumber); 4844 } 4845 final float contentWidth = Math.round(mMagnifierAnimator.mMagnifier.getWidth() 4846 / mMagnifierAnimator.mMagnifier.getZoom()); 4847 if (touchXInView < leftBound - contentWidth / 2 4848 || touchXInView > rightBound + contentWidth / 2) { 4849 // The touch is too far from the current line / selection, so hide the magnifier. 4850 return false; 4851 } 4852 showPosInView.x = Math.max(leftBound, Math.min(rightBound, touchXInView)); 4853 4854 // Vertically snap to middle of current line. 4855 showPosInView.y = (mTextView.getLayout().getLineTop(lineNumber) 4856 + mTextView.getLayout().getLineBottom(lineNumber)) / 2.0f 4857 + mTextView.getTotalPaddingTop() - mTextView.getScrollY(); 4858 4859 return true; 4860 } 4861 4862 private boolean handleOverlapsMagnifier(@NonNull final HandleView handle, 4863 @NonNull final Rect magnifierRect) { 4864 final PopupWindow window = handle.mContainer; 4865 if (!window.hasDecorView()) { 4866 return false; 4867 } 4868 final Rect handleRect = new Rect( 4869 window.getDecorViewLayoutParams().x, 4870 window.getDecorViewLayoutParams().y, 4871 window.getDecorViewLayoutParams().x + window.getContentView().getWidth(), 4872 window.getDecorViewLayoutParams().y + window.getContentView().getHeight()); 4873 return Rect.intersects(handleRect, magnifierRect); 4874 } 4875 4876 private @Nullable HandleView getOtherSelectionHandle() { 4877 final SelectionModifierCursorController controller = getSelectionController(); 4878 if (controller == null || !controller.isActive()) { 4879 return null; 4880 } 4881 return controller.mStartHandle != this 4882 ? controller.mStartHandle 4883 : controller.mEndHandle; 4884 } 4885 4886 private final Magnifier.Callback mHandlesVisibilityCallback = new Magnifier.Callback() { 4887 @Override 4888 public void onOperationComplete() { 4889 final Point magnifierTopLeft = mMagnifierAnimator.mMagnifier.getWindowCoords(); 4890 if (magnifierTopLeft == null) { 4891 return; 4892 } 4893 final Rect magnifierRect = new Rect(magnifierTopLeft.x, magnifierTopLeft.y, 4894 magnifierTopLeft.x + mMagnifierAnimator.mMagnifier.getWidth(), 4895 magnifierTopLeft.y + mMagnifierAnimator.mMagnifier.getHeight()); 4896 setVisible(!handleOverlapsMagnifier(HandleView.this, magnifierRect)); 4897 final HandleView otherHandle = getOtherSelectionHandle(); 4898 if (otherHandle != null) { 4899 otherHandle.setVisible(!handleOverlapsMagnifier(otherHandle, magnifierRect)); 4900 } 4901 } 4902 }; 4903 4904 protected final void updateMagnifier(@NonNull final MotionEvent event) { 4905 if (mMagnifierAnimator == null) { 4906 return; 4907 } 4908 4909 final PointF showPosInView = new PointF(); 4910 final boolean shouldShow = !tooLargeTextForMagnifier() 4911 && obtainMagnifierShowCoordinates(event, showPosInView); 4912 if (shouldShow) { 4913 // Make the cursor visible and stop blinking. 4914 mRenderCursorRegardlessTiming = true; 4915 mTextView.invalidateCursorPath(); 4916 suspendBlink(); 4917 mMagnifierAnimator.mMagnifier 4918 .setOnOperationCompleteCallback(mHandlesVisibilityCallback); 4919 4920 mMagnifierAnimator.show(showPosInView.x, showPosInView.y); 4921 } else { 4922 dismissMagnifier(); 4923 } 4924 } 4925 4926 protected final void dismissMagnifier() { 4927 if (mMagnifierAnimator != null) { 4928 mMagnifierAnimator.dismiss(); 4929 mRenderCursorRegardlessTiming = false; 4930 resumeBlink(); 4931 setVisible(true); 4932 final HandleView otherHandle = getOtherSelectionHandle(); 4933 if (otherHandle != null) { 4934 otherHandle.setVisible(true); 4935 } 4936 } 4937 } 4938 4939 @Override 4940 public boolean onTouchEvent(MotionEvent ev) { 4941 updateFloatingToolbarVisibility(ev); 4942 4943 switch (ev.getActionMasked()) { 4944 case MotionEvent.ACTION_DOWN: { 4945 startTouchUpFilter(getCurrentCursorOffset()); 4946 4947 final PositionListener positionListener = getPositionListener(); 4948 mLastParentX = positionListener.getPositionX(); 4949 mLastParentY = positionListener.getPositionY(); 4950 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4951 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4952 4953 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4954 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4955 mTouchToWindowOffsetX = xInWindow - mPositionX; 4956 mTouchToWindowOffsetY = yInWindow - mPositionY; 4957 4958 mIsDragging = true; 4959 mPreviousLineTouched = UNSET_LINE; 4960 break; 4961 } 4962 4963 case MotionEvent.ACTION_MOVE: { 4964 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4965 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4966 4967 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4968 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4969 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4970 float newVerticalOffset; 4971 if (previousVerticalOffset < mIdealVerticalOffset) { 4972 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4973 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4974 } else { 4975 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4976 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4977 } 4978 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4979 4980 final float newPosX = 4981 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4982 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4983 4984 updatePosition(newPosX, newPosY, 4985 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4986 break; 4987 } 4988 4989 case MotionEvent.ACTION_UP: 4990 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4991 // Fall through. 4992 case MotionEvent.ACTION_CANCEL: 4993 mIsDragging = false; 4994 updateDrawable(); 4995 break; 4996 } 4997 return true; 4998 } 4999 5000 public boolean isDragging() { 5001 return mIsDragging; 5002 } 5003 5004 void onHandleMoved() {} 5005 5006 public void onDetached() {} 5007 } 5008 5009 private class InsertionHandleView extends HandleView { 5010 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 5011 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 5012 5013 // Used to detect taps on the insertion handle, which will affect the insertion action mode 5014 private float mDownPositionX, mDownPositionY; 5015 private Runnable mHider; 5016 5017 public InsertionHandleView(Drawable drawable) { 5018 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 5019 } 5020 5021 @Override 5022 public void show() { 5023 super.show(); 5024 5025 final long durationSinceCutOrCopy = 5026 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 5027 5028 // Cancel the single tap delayed runnable. 5029 if (mInsertionActionModeRunnable != null 5030 && ((mTapState == TAP_STATE_DOUBLE_TAP) 5031 || (mTapState == TAP_STATE_TRIPLE_CLICK) 5032 || isCursorInsideEasyCorrectionSpan())) { 5033 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5034 } 5035 5036 // Prepare and schedule the single tap runnable to run exactly after the double tap 5037 // timeout has passed. 5038 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 5039 && !isCursorInsideEasyCorrectionSpan() 5040 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 5041 if (mTextActionMode == null) { 5042 if (mInsertionActionModeRunnable == null) { 5043 mInsertionActionModeRunnable = new Runnable() { 5044 @Override 5045 public void run() { 5046 startInsertionActionMode(); 5047 } 5048 }; 5049 } 5050 mTextView.postDelayed( 5051 mInsertionActionModeRunnable, 5052 ViewConfiguration.getDoubleTapTimeout() + 1); 5053 } 5054 5055 } 5056 5057 hideAfterDelay(); 5058 } 5059 5060 private void hideAfterDelay() { 5061 if (mHider == null) { 5062 mHider = new Runnable() { 5063 public void run() { 5064 hide(); 5065 } 5066 }; 5067 } else { 5068 removeHiderCallback(); 5069 } 5070 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 5071 } 5072 5073 private void removeHiderCallback() { 5074 if (mHider != null) { 5075 mTextView.removeCallbacks(mHider); 5076 } 5077 } 5078 5079 @Override 5080 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 5081 return drawable.getIntrinsicWidth() / 2; 5082 } 5083 5084 @Override 5085 protected int getHorizontalGravity(boolean isRtlRun) { 5086 return Gravity.CENTER_HORIZONTAL; 5087 } 5088 5089 @Override 5090 protected int getCursorOffset() { 5091 int offset = super.getCursorOffset(); 5092 if (mDrawableForCursor != null) { 5093 mDrawableForCursor.getPadding(mTempRect); 5094 offset += (mDrawableForCursor.getIntrinsicWidth() 5095 - mTempRect.left - mTempRect.right) / 2; 5096 } 5097 return offset; 5098 } 5099 5100 @Override 5101 int getCursorHorizontalPosition(Layout layout, int offset) { 5102 if (mDrawableForCursor != null) { 5103 final float horizontal = getHorizontal(layout, offset); 5104 return clampHorizontalPosition(mDrawableForCursor, horizontal) + mTempRect.left; 5105 } 5106 return super.getCursorHorizontalPosition(layout, offset); 5107 } 5108 5109 @Override 5110 public boolean onTouchEvent(MotionEvent ev) { 5111 final boolean result = super.onTouchEvent(ev); 5112 5113 switch (ev.getActionMasked()) { 5114 case MotionEvent.ACTION_DOWN: 5115 mDownPositionX = ev.getRawX(); 5116 mDownPositionY = ev.getRawY(); 5117 updateMagnifier(ev); 5118 break; 5119 5120 case MotionEvent.ACTION_MOVE: 5121 updateMagnifier(ev); 5122 break; 5123 5124 case MotionEvent.ACTION_UP: 5125 if (!offsetHasBeenChanged()) { 5126 final float deltaX = mDownPositionX - ev.getRawX(); 5127 final float deltaY = mDownPositionY - ev.getRawY(); 5128 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5129 5130 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 5131 mTextView.getContext()); 5132 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 5133 5134 if (distanceSquared < touchSlop * touchSlop) { 5135 // Tapping on the handle toggles the insertion action mode. 5136 if (mTextActionMode != null) { 5137 stopTextActionMode(); 5138 } else { 5139 startInsertionActionMode(); 5140 } 5141 } 5142 } else { 5143 if (mTextActionMode != null) { 5144 mTextActionMode.invalidateContentRect(); 5145 } 5146 } 5147 // Fall through. 5148 case MotionEvent.ACTION_CANCEL: 5149 hideAfterDelay(); 5150 dismissMagnifier(); 5151 break; 5152 5153 default: 5154 break; 5155 } 5156 5157 return result; 5158 } 5159 5160 @Override 5161 public int getCurrentCursorOffset() { 5162 return mTextView.getSelectionStart(); 5163 } 5164 5165 @Override 5166 public void updateSelection(int offset) { 5167 Selection.setSelection((Spannable) mTextView.getText(), offset); 5168 } 5169 5170 @Override 5171 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 5172 Layout layout = mTextView.getLayout(); 5173 int offset; 5174 if (layout != null) { 5175 if (mPreviousLineTouched == UNSET_LINE) { 5176 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 5177 } 5178 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 5179 offset = getOffsetAtCoordinate(layout, currLine, x); 5180 mPreviousLineTouched = currLine; 5181 } else { 5182 offset = -1; 5183 } 5184 positionAtCursorOffset(offset, false, fromTouchScreen); 5185 if (mTextActionMode != null) { 5186 invalidateActionMode(); 5187 } 5188 } 5189 5190 @Override 5191 void onHandleMoved() { 5192 super.onHandleMoved(); 5193 removeHiderCallback(); 5194 } 5195 5196 @Override 5197 public void onDetached() { 5198 super.onDetached(); 5199 removeHiderCallback(); 5200 } 5201 5202 @Override 5203 @MagnifierHandleTrigger 5204 protected int getMagnifierHandleTrigger() { 5205 return MagnifierHandleTrigger.INSERTION; 5206 } 5207 } 5208 5209 @Retention(RetentionPolicy.SOURCE) 5210 @IntDef(prefix = { "HANDLE_TYPE_" }, value = { 5211 HANDLE_TYPE_SELECTION_START, 5212 HANDLE_TYPE_SELECTION_END 5213 }) 5214 public @interface HandleType {} 5215 public static final int HANDLE_TYPE_SELECTION_START = 0; 5216 public static final int HANDLE_TYPE_SELECTION_END = 1; 5217 5218 /** For selection handles */ 5219 @VisibleForTesting 5220 public final class SelectionHandleView extends HandleView { 5221 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 5222 // end (HANDLE_TYPE_SELECTION_END). 5223 @HandleType 5224 private final int mHandleType; 5225 // Indicates whether the cursor is making adjustments within a word. 5226 private boolean mInWord = false; 5227 // Difference between touch position and word boundary position. 5228 private float mTouchWordDelta; 5229 // X value of the previous updatePosition call. 5230 private float mPrevX; 5231 // Indicates if the handle has moved a boundary between LTR and RTL text. 5232 private boolean mLanguageDirectionChanged = false; 5233 // Distance from edge of horizontally scrolling text view 5234 // to use to switch to character mode. 5235 private final float mTextViewEdgeSlop; 5236 // Used to save text view location. 5237 private final int[] mTextViewLocation = new int[2]; 5238 5239 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 5240 @HandleType int handleType) { 5241 super(drawableLtr, drawableRtl, id); 5242 mHandleType = handleType; 5243 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 5244 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 5245 } 5246 5247 private boolean isStartHandle() { 5248 return mHandleType == HANDLE_TYPE_SELECTION_START; 5249 } 5250 5251 @Override 5252 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 5253 if (isRtlRun == isStartHandle()) { 5254 return drawable.getIntrinsicWidth() / 4; 5255 } else { 5256 return (drawable.getIntrinsicWidth() * 3) / 4; 5257 } 5258 } 5259 5260 @Override 5261 protected int getHorizontalGravity(boolean isRtlRun) { 5262 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 5263 } 5264 5265 @Override 5266 public int getCurrentCursorOffset() { 5267 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 5268 } 5269 5270 @Override 5271 protected void updateSelection(int offset) { 5272 if (isStartHandle()) { 5273 Selection.setSelection((Spannable) mTextView.getText(), offset, 5274 mTextView.getSelectionEnd()); 5275 } else { 5276 Selection.setSelection((Spannable) mTextView.getText(), 5277 mTextView.getSelectionStart(), offset); 5278 } 5279 updateDrawable(); 5280 if (mTextActionMode != null) { 5281 invalidateActionMode(); 5282 } 5283 } 5284 5285 @Override 5286 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 5287 final Layout layout = mTextView.getLayout(); 5288 if (layout == null) { 5289 // HandleView will deal appropriately in positionAtCursorOffset when 5290 // layout is null. 5291 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 5292 fromTouchScreen); 5293 return; 5294 } 5295 5296 if (mPreviousLineTouched == UNSET_LINE) { 5297 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 5298 } 5299 5300 boolean positionCursor = false; 5301 final int anotherHandleOffset = 5302 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5303 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 5304 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 5305 5306 if (isStartHandle() && initialOffset >= anotherHandleOffset 5307 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 5308 // Handles have crossed, bound it to the first selected line and 5309 // adjust by word / char as normal. 5310 currLine = layout.getLineForOffset(anotherHandleOffset); 5311 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 5312 } 5313 5314 int offset = initialOffset; 5315 final int wordEnd = getWordEnd(offset); 5316 final int wordStart = getWordStart(offset); 5317 5318 if (mPrevX == UNSET_X_VALUE) { 5319 mPrevX = x; 5320 } 5321 5322 final int currentOffset = getCurrentCursorOffset(); 5323 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 5324 final boolean atRtl = isAtRtlRun(layout, offset); 5325 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 5326 5327 // We can't determine if the user is expanding or shrinking the selection if they're 5328 // on a bi-di boundary, so until they've moved past the boundary we'll just place 5329 // the cursor at the current position. 5330 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 5331 // We're on a boundary or this is the first direction change -- just update 5332 // to the current position. 5333 mLanguageDirectionChanged = true; 5334 mTouchWordDelta = 0.0f; 5335 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5336 return; 5337 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 5338 // We've just moved past the boundary so update the position. After this we can 5339 // figure out if the user is expanding or shrinking to go by word or character. 5340 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5341 mTouchWordDelta = 0.0f; 5342 mLanguageDirectionChanged = false; 5343 return; 5344 } 5345 5346 boolean isExpanding; 5347 final float xDiff = x - mPrevX; 5348 if (isStartHandle()) { 5349 isExpanding = currLine < mPreviousLineTouched; 5350 } else { 5351 isExpanding = currLine > mPreviousLineTouched; 5352 } 5353 if (atRtl == isStartHandle()) { 5354 isExpanding |= xDiff > 0; 5355 } else { 5356 isExpanding |= xDiff < 0; 5357 } 5358 5359 if (mTextView.getHorizontallyScrolling()) { 5360 if (positionNearEdgeOfScrollingView(x, atRtl) 5361 && ((isStartHandle() && mTextView.getScrollX() != 0) 5362 || (!isStartHandle() 5363 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 5364 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 5365 || (!isStartHandle() && offset > currentOffset))) 5366 || !isExpanding)) { 5367 // If we're expanding ensure that the offset is actually expanding compared to 5368 // the current offset, if the handle snapped to the word, the finger position 5369 // may be out of sync and we don't want the selection to jump back. 5370 mTouchWordDelta = 0.0f; 5371 final int nextOffset = (atRtl == isStartHandle()) 5372 ? layout.getOffsetToRightOf(mPreviousOffset) 5373 : layout.getOffsetToLeftOf(mPreviousOffset); 5374 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 5375 return; 5376 } 5377 } 5378 5379 if (isExpanding) { 5380 // User is increasing the selection. 5381 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 5382 final boolean snapToWord = (!mInWord 5383 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 5384 && atRtl == isAtRtlRun(layout, wordBoundary); 5385 if (snapToWord) { 5386 // Sometimes words can be broken across lines (Chinese, hyphenation). 5387 // We still snap to the word boundary but we only use the letters on the 5388 // current line to determine if the user is far enough into the word to snap. 5389 if (layout.getLineForOffset(wordBoundary) != currLine) { 5390 wordBoundary = isStartHandle() 5391 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 5392 } 5393 final int offsetThresholdToSnap = isStartHandle() 5394 ? wordEnd - ((wordEnd - wordBoundary) / 2) 5395 : wordStart + ((wordBoundary - wordStart) / 2); 5396 if (isStartHandle() 5397 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 5398 // User is far enough into the word or on a different line so we expand by 5399 // word. 5400 offset = wordStart; 5401 } else if (!isStartHandle() 5402 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 5403 // User is far enough into the word or on a different line so we expand by 5404 // word. 5405 offset = wordEnd; 5406 } else { 5407 offset = mPreviousOffset; 5408 } 5409 } 5410 if ((isStartHandle() && offset < initialOffset) 5411 || (!isStartHandle() && offset > initialOffset)) { 5412 final float adjustedX = getHorizontal(layout, offset); 5413 mTouchWordDelta = 5414 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5415 } else { 5416 mTouchWordDelta = 0.0f; 5417 } 5418 positionCursor = true; 5419 } else { 5420 final int adjustedOffset = 5421 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 5422 final boolean shrinking = isStartHandle() 5423 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 5424 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 5425 if (shrinking) { 5426 // User is shrinking the selection. 5427 if (currLine != mPrevLine) { 5428 // We're on a different line, so we'll snap to word boundaries. 5429 offset = isStartHandle() ? wordStart : wordEnd; 5430 if ((isStartHandle() && offset < initialOffset) 5431 || (!isStartHandle() && offset > initialOffset)) { 5432 final float adjustedX = getHorizontal(layout, offset); 5433 mTouchWordDelta = 5434 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5435 } else { 5436 mTouchWordDelta = 0.0f; 5437 } 5438 } else { 5439 offset = adjustedOffset; 5440 } 5441 positionCursor = true; 5442 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 5443 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 5444 // Handle has jumped to the word boundary, and the user is moving 5445 // their finger towards the handle, the delta should be updated. 5446 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 5447 - getHorizontal(layout, mPreviousOffset); 5448 } 5449 } 5450 5451 if (positionCursor) { 5452 mPreviousLineTouched = currLine; 5453 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5454 } 5455 mPrevX = x; 5456 } 5457 5458 @Override 5459 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 5460 boolean fromTouchScreen) { 5461 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 5462 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 5463 } 5464 5465 @Override 5466 public boolean onTouchEvent(MotionEvent event) { 5467 boolean superResult = super.onTouchEvent(event); 5468 5469 switch (event.getActionMasked()) { 5470 case MotionEvent.ACTION_DOWN: 5471 // Reset the touch word offset and x value when the user 5472 // re-engages the handle. 5473 mTouchWordDelta = 0.0f; 5474 mPrevX = UNSET_X_VALUE; 5475 updateMagnifier(event); 5476 break; 5477 5478 case MotionEvent.ACTION_MOVE: 5479 updateMagnifier(event); 5480 break; 5481 5482 case MotionEvent.ACTION_UP: 5483 case MotionEvent.ACTION_CANCEL: 5484 dismissMagnifier(); 5485 break; 5486 } 5487 5488 return superResult; 5489 } 5490 5491 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 5492 final int anotherHandleOffset = 5493 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5494 if ((isStartHandle() && offset >= anotherHandleOffset) 5495 || (!isStartHandle() && offset <= anotherHandleOffset)) { 5496 mTouchWordDelta = 0.0f; 5497 final Layout layout = mTextView.getLayout(); 5498 if (layout != null && offset != anotherHandleOffset) { 5499 final float horiz = getHorizontal(layout, offset); 5500 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5501 !isStartHandle()); 5502 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5503 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5504 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5505 // This handle passes another one as it crossed a direction boundary. 5506 // Don't minimize the selection, but keep the handle at the run boundary. 5507 final int currentOffset = getCurrentCursorOffset(); 5508 final int offsetToGetRunRange = isStartHandle() 5509 ? currentOffset : Math.max(currentOffset - 1, 0); 5510 final long range = layout.getRunRange(offsetToGetRunRange); 5511 if (isStartHandle()) { 5512 offset = TextUtils.unpackRangeStartFromLong(range); 5513 } else { 5514 offset = TextUtils.unpackRangeEndFromLong(range); 5515 } 5516 positionAtCursorOffset(offset, false, fromTouchScreen); 5517 return; 5518 } 5519 } 5520 // Handles can not cross and selection is at least one character. 5521 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5522 } 5523 positionAtCursorOffset(offset, false, fromTouchScreen); 5524 } 5525 5526 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5527 mTextView.getLocationOnScreen(mTextViewLocation); 5528 boolean nearEdge; 5529 if (atRtl == isStartHandle()) { 5530 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5531 - mTextView.getPaddingRight(); 5532 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5533 } else { 5534 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5535 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5536 } 5537 return nearEdge; 5538 } 5539 5540 @Override 5541 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5542 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5543 return layout.isRtlCharAt(offsetToCheck); 5544 } 5545 5546 @Override 5547 public float getHorizontal(@NonNull Layout layout, int offset) { 5548 return getHorizontal(layout, offset, isStartHandle()); 5549 } 5550 5551 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5552 final int line = layout.getLineForOffset(offset); 5553 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5554 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5555 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5556 return (isRtlChar == isRtlParagraph) 5557 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5558 } 5559 5560 @Override 5561 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5562 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5563 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5564 if (!layout.isLevelBoundary(primaryOffset)) { 5565 return primaryOffset; 5566 } 5567 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5568 final int currentOffset = getCurrentCursorOffset(); 5569 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5570 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5571 if (primaryDiff < secondaryDiff) { 5572 return primaryOffset; 5573 } else if (primaryDiff > secondaryDiff) { 5574 return secondaryOffset; 5575 } else { 5576 final int offsetToCheck = isStartHandle() 5577 ? currentOffset : Math.max(currentOffset - 1, 0); 5578 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5579 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5580 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5581 } 5582 } 5583 5584 @MagnifierHandleTrigger 5585 protected int getMagnifierHandleTrigger() { 5586 return isStartHandle() 5587 ? MagnifierHandleTrigger.SELECTION_START 5588 : MagnifierHandleTrigger.SELECTION_END; 5589 } 5590 } 5591 5592 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5593 final int trueLine = mTextView.getLineAtCoordinate(y); 5594 if (layout == null || prevLine > layout.getLineCount() 5595 || layout.getLineCount() <= 0 || prevLine < 0) { 5596 // Invalid parameters, just return whatever line is at y. 5597 return trueLine; 5598 } 5599 5600 if (Math.abs(trueLine - prevLine) >= 2) { 5601 // Only stick to lines if we're within a line of the previous selection. 5602 return trueLine; 5603 } 5604 5605 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5606 final int lineCount = layout.getLineCount(); 5607 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5608 5609 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5610 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5611 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5612 5613 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5614 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5615 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5616 5617 // Determine if we've moved lines based on y position and previous line. 5618 int currLine; 5619 if (y <= yTopBound) { 5620 currLine = Math.max(prevLine - 1, 0); 5621 } else if (y >= yBottomBound) { 5622 currLine = Math.min(prevLine + 1, lineCount - 1); 5623 } else { 5624 currLine = prevLine; 5625 } 5626 return currLine; 5627 } 5628 5629 /** 5630 * A CursorController instance can be used to control a cursor in the text. 5631 */ 5632 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5633 /** 5634 * Makes the cursor controller visible on screen. 5635 * See also {@link #hide()}. 5636 */ 5637 public void show(); 5638 5639 /** 5640 * Hide the cursor controller from screen. 5641 * See also {@link #show()}. 5642 */ 5643 public void hide(); 5644 5645 /** 5646 * Called when the view is detached from window. Perform house keeping task, such as 5647 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5648 * preventing the activity from being recycled. 5649 */ 5650 public void onDetached(); 5651 5652 public boolean isCursorBeingModified(); 5653 5654 public boolean isActive(); 5655 } 5656 5657 private class InsertionPointCursorController implements CursorController { 5658 private InsertionHandleView mHandle; 5659 5660 public void show() { 5661 getHandle().show(); 5662 5663 if (mSelectionModifierCursorController != null) { 5664 mSelectionModifierCursorController.hide(); 5665 } 5666 } 5667 5668 public void hide() { 5669 if (mHandle != null) { 5670 mHandle.hide(); 5671 } 5672 } 5673 5674 public void onTouchModeChanged(boolean isInTouchMode) { 5675 if (!isInTouchMode) { 5676 hide(); 5677 } 5678 } 5679 5680 private InsertionHandleView getHandle() { 5681 if (mSelectHandleCenter == null) { 5682 mSelectHandleCenter = mTextView.getContext().getDrawable( 5683 mTextView.mTextSelectHandleRes); 5684 } 5685 if (mHandle == null) { 5686 mHandle = new InsertionHandleView(mSelectHandleCenter); 5687 } 5688 return mHandle; 5689 } 5690 5691 @Override 5692 public void onDetached() { 5693 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5694 observer.removeOnTouchModeChangeListener(this); 5695 5696 if (mHandle != null) mHandle.onDetached(); 5697 } 5698 5699 @Override 5700 public boolean isCursorBeingModified() { 5701 return mHandle != null && mHandle.isDragging(); 5702 } 5703 5704 @Override 5705 public boolean isActive() { 5706 return mHandle != null && mHandle.isShowing(); 5707 } 5708 5709 public void invalidateHandle() { 5710 if (mHandle != null) { 5711 mHandle.invalidate(); 5712 } 5713 } 5714 } 5715 5716 class SelectionModifierCursorController implements CursorController { 5717 // The cursor controller handles, lazily created when shown. 5718 private SelectionHandleView mStartHandle; 5719 private SelectionHandleView mEndHandle; 5720 // The offsets of that last touch down event. Remembered to start selection there. 5721 private int mMinTouchOffset, mMaxTouchOffset; 5722 5723 private float mDownPositionX, mDownPositionY; 5724 private boolean mGestureStayedInTapRegion; 5725 5726 // Where the user first starts the drag motion. 5727 private int mStartOffset = -1; 5728 5729 private boolean mHaventMovedEnoughToStartDrag; 5730 // The line that a selection happened most recently with the drag accelerator. 5731 private int mLineSelectionIsOn = -1; 5732 // Whether the drag accelerator has selected past the initial line. 5733 private boolean mSwitchedLines = false; 5734 5735 // Indicates the drag accelerator mode that the user is currently using. 5736 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5737 // Drag accelerator is inactive. 5738 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5739 // Character based selection by dragging. Only for mouse. 5740 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5741 // Word based selection by dragging. Enabled after long pressing or double tapping. 5742 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5743 // Paragraph based selection by dragging. Enabled after mouse triple click. 5744 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5745 5746 SelectionModifierCursorController() { 5747 resetTouchOffsets(); 5748 } 5749 5750 public void show() { 5751 if (mTextView.isInBatchEditMode()) { 5752 return; 5753 } 5754 initDrawables(); 5755 initHandles(); 5756 } 5757 5758 private void initDrawables() { 5759 if (mSelectHandleLeft == null) { 5760 mSelectHandleLeft = mTextView.getContext().getDrawable( 5761 mTextView.mTextSelectHandleLeftRes); 5762 } 5763 if (mSelectHandleRight == null) { 5764 mSelectHandleRight = mTextView.getContext().getDrawable( 5765 mTextView.mTextSelectHandleRightRes); 5766 } 5767 } 5768 5769 private void initHandles() { 5770 // Lazy object creation has to be done before updatePosition() is called. 5771 if (mStartHandle == null) { 5772 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5773 com.android.internal.R.id.selection_start_handle, 5774 HANDLE_TYPE_SELECTION_START); 5775 } 5776 if (mEndHandle == null) { 5777 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5778 com.android.internal.R.id.selection_end_handle, 5779 HANDLE_TYPE_SELECTION_END); 5780 } 5781 5782 mStartHandle.show(); 5783 mEndHandle.show(); 5784 5785 hideInsertionPointCursorController(); 5786 } 5787 5788 public void hide() { 5789 if (mStartHandle != null) mStartHandle.hide(); 5790 if (mEndHandle != null) mEndHandle.hide(); 5791 } 5792 5793 public void enterDrag(int dragAcceleratorMode) { 5794 // Just need to init the handles / hide insertion cursor. 5795 show(); 5796 mDragAcceleratorMode = dragAcceleratorMode; 5797 // Start location of selection. 5798 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5799 mLastDownPositionY); 5800 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5801 // Don't show the handles until user has lifted finger. 5802 hide(); 5803 5804 // This stops scrolling parents from intercepting the touch event, allowing 5805 // the user to continue dragging across the screen to select text; TextView will 5806 // scroll as necessary. 5807 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5808 mTextView.cancelLongPress(); 5809 } 5810 5811 public void onTouchEvent(MotionEvent event) { 5812 // This is done even when the View does not have focus, so that long presses can start 5813 // selection and tap can move cursor from this tap position. 5814 final float eventX = event.getX(); 5815 final float eventY = event.getY(); 5816 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5817 switch (event.getActionMasked()) { 5818 case MotionEvent.ACTION_DOWN: 5819 if (extractedTextModeWillBeStarted()) { 5820 // Prevent duplicating the selection handles until the mode starts. 5821 hide(); 5822 } else { 5823 // Remember finger down position, to be able to start selection from there. 5824 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5825 eventX, eventY); 5826 5827 // Double tap detection 5828 if (mGestureStayedInTapRegion) { 5829 if (mTapState == TAP_STATE_DOUBLE_TAP 5830 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5831 final float deltaX = eventX - mDownPositionX; 5832 final float deltaY = eventY - mDownPositionY; 5833 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5834 5835 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5836 mTextView.getContext()); 5837 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5838 boolean stayedInArea = 5839 distanceSquared < doubleTapSlop * doubleTapSlop; 5840 5841 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5842 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5843 selectCurrentWordAndStartDrag(); 5844 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5845 selectCurrentParagraphAndStartDrag(); 5846 } 5847 mDiscardNextActionUp = true; 5848 } 5849 } 5850 } 5851 5852 mDownPositionX = eventX; 5853 mDownPositionY = eventY; 5854 mGestureStayedInTapRegion = true; 5855 mHaventMovedEnoughToStartDrag = true; 5856 } 5857 break; 5858 5859 case MotionEvent.ACTION_POINTER_DOWN: 5860 case MotionEvent.ACTION_POINTER_UP: 5861 // Handle multi-point gestures. Keep min and max offset positions. 5862 // Only activated for devices that correctly handle multi-touch. 5863 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5864 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5865 updateMinAndMaxOffsets(event); 5866 } 5867 break; 5868 5869 case MotionEvent.ACTION_MOVE: 5870 final ViewConfiguration viewConfig = ViewConfiguration.get( 5871 mTextView.getContext()); 5872 final int touchSlop = viewConfig.getScaledTouchSlop(); 5873 5874 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5875 final float deltaX = eventX - mDownPositionX; 5876 final float deltaY = eventY - mDownPositionY; 5877 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5878 5879 if (mGestureStayedInTapRegion) { 5880 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5881 mGestureStayedInTapRegion = 5882 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5883 } 5884 if (mHaventMovedEnoughToStartDrag) { 5885 // We don't start dragging until the user has moved enough. 5886 mHaventMovedEnoughToStartDrag = 5887 distanceSquared <= touchSlop * touchSlop; 5888 } 5889 } 5890 5891 if (isMouse && !isDragAcceleratorActive()) { 5892 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5893 if (mTextView.hasSelection() 5894 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5895 && offset >= mTextView.getSelectionStart() 5896 && offset <= mTextView.getSelectionEnd()) { 5897 startDragAndDrop(); 5898 break; 5899 } 5900 5901 if (mStartOffset != offset) { 5902 // Start character based drag accelerator. 5903 stopTextActionMode(); 5904 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5905 mDiscardNextActionUp = true; 5906 mHaventMovedEnoughToStartDrag = false; 5907 } 5908 } 5909 5910 if (mStartHandle != null && mStartHandle.isShowing()) { 5911 // Don't do the drag if the handles are showing already. 5912 break; 5913 } 5914 5915 updateSelection(event); 5916 break; 5917 5918 case MotionEvent.ACTION_UP: 5919 if (!isDragAcceleratorActive()) { 5920 break; 5921 } 5922 updateSelection(event); 5923 5924 // No longer dragging to select text, let the parent intercept events. 5925 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5926 5927 // No longer the first dragging motion, reset. 5928 resetDragAcceleratorState(); 5929 5930 if (mTextView.hasSelection()) { 5931 // Drag selection should not be adjusted by the text classifier. 5932 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5933 } 5934 break; 5935 } 5936 } 5937 5938 private void updateSelection(MotionEvent event) { 5939 if (mTextView.getLayout() != null) { 5940 switch (mDragAcceleratorMode) { 5941 case DRAG_ACCELERATOR_MODE_CHARACTER: 5942 updateCharacterBasedSelection(event); 5943 break; 5944 case DRAG_ACCELERATOR_MODE_WORD: 5945 updateWordBasedSelection(event); 5946 break; 5947 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5948 updateParagraphBasedSelection(event); 5949 break; 5950 } 5951 } 5952 } 5953 5954 /** 5955 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5956 * 5957 * @return true if the drag was started. 5958 */ 5959 private boolean selectCurrentParagraphAndStartDrag() { 5960 if (mInsertionActionModeRunnable != null) { 5961 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5962 } 5963 stopTextActionMode(); 5964 if (!selectCurrentParagraph()) { 5965 return false; 5966 } 5967 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5968 return true; 5969 } 5970 5971 private void updateCharacterBasedSelection(MotionEvent event) { 5972 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5973 updateSelectionInternal(mStartOffset, offset, 5974 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5975 } 5976 5977 private void updateWordBasedSelection(MotionEvent event) { 5978 if (mHaventMovedEnoughToStartDrag) { 5979 return; 5980 } 5981 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5982 final ViewConfiguration viewConfig = ViewConfiguration.get( 5983 mTextView.getContext()); 5984 final float eventX = event.getX(); 5985 final float eventY = event.getY(); 5986 final int currLine; 5987 if (isMouse) { 5988 // No need to offset the y coordinate for mouse input. 5989 currLine = mTextView.getLineAtCoordinate(eventY); 5990 } else { 5991 float y = eventY; 5992 if (mSwitchedLines) { 5993 // Offset the finger by the same vertical offset as the handles. 5994 // This improves visibility of the content being selected by 5995 // shifting the finger below the content, this is applied once 5996 // the user has switched lines. 5997 final int touchSlop = viewConfig.getScaledTouchSlop(); 5998 final float fingerOffset = (mStartHandle != null) 5999 ? mStartHandle.getIdealVerticalOffset() 6000 : touchSlop; 6001 y = eventY - fingerOffset; 6002 } 6003 6004 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 6005 y); 6006 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 6007 // Break early here, we want to offset the finger position from 6008 // the selection highlight, once the user moved their finger 6009 // to a different line we should apply the offset and *not* switch 6010 // lines until recomputing the position with the finger offset. 6011 mSwitchedLines = true; 6012 return; 6013 } 6014 } 6015 6016 int startOffset; 6017 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 6018 // Snap to word boundaries. 6019 if (mStartOffset < offset) { 6020 // Expanding with end handle. 6021 offset = getWordEnd(offset); 6022 startOffset = getWordStart(mStartOffset); 6023 } else { 6024 // Expanding with start handle. 6025 offset = getWordStart(offset); 6026 startOffset = getWordEnd(mStartOffset); 6027 if (startOffset == offset) { 6028 offset = getNextCursorOffset(offset, false); 6029 } 6030 } 6031 mLineSelectionIsOn = currLine; 6032 updateSelectionInternal(startOffset, offset, 6033 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 6034 } 6035 6036 private void updateParagraphBasedSelection(MotionEvent event) { 6037 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 6038 6039 final int start = Math.min(offset, mStartOffset); 6040 final int end = Math.max(offset, mStartOffset); 6041 final long paragraphsRange = getParagraphsRange(start, end); 6042 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 6043 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 6044 updateSelectionInternal(selectionStart, selectionEnd, 6045 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 6046 } 6047 6048 private void updateSelectionInternal(int selectionStart, int selectionEnd, 6049 boolean fromTouchScreen) { 6050 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 6051 && ((mTextView.getSelectionStart() != selectionStart) 6052 || (mTextView.getSelectionEnd() != selectionEnd)); 6053 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 6054 if (performHapticFeedback) { 6055 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 6056 } 6057 } 6058 6059 /** 6060 * @param event 6061 */ 6062 private void updateMinAndMaxOffsets(MotionEvent event) { 6063 int pointerCount = event.getPointerCount(); 6064 for (int index = 0; index < pointerCount; index++) { 6065 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 6066 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 6067 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 6068 } 6069 } 6070 6071 public int getMinTouchOffset() { 6072 return mMinTouchOffset; 6073 } 6074 6075 public int getMaxTouchOffset() { 6076 return mMaxTouchOffset; 6077 } 6078 6079 public void resetTouchOffsets() { 6080 mMinTouchOffset = mMaxTouchOffset = -1; 6081 resetDragAcceleratorState(); 6082 } 6083 6084 private void resetDragAcceleratorState() { 6085 mStartOffset = -1; 6086 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 6087 mSwitchedLines = false; 6088 final int selectionStart = mTextView.getSelectionStart(); 6089 final int selectionEnd = mTextView.getSelectionEnd(); 6090 if (selectionStart < 0 || selectionEnd < 0) { 6091 Selection.removeSelection((Spannable) mTextView.getText()); 6092 } else if (selectionStart > selectionEnd) { 6093 Selection.setSelection((Spannable) mTextView.getText(), 6094 selectionEnd, selectionStart); 6095 } 6096 } 6097 6098 /** 6099 * @return true iff this controller is currently used to move the selection start. 6100 */ 6101 public boolean isSelectionStartDragged() { 6102 return mStartHandle != null && mStartHandle.isDragging(); 6103 } 6104 6105 @Override 6106 public boolean isCursorBeingModified() { 6107 return isDragAcceleratorActive() || isSelectionStartDragged() 6108 || (mEndHandle != null && mEndHandle.isDragging()); 6109 } 6110 6111 /** 6112 * @return true if the user is selecting text using the drag accelerator. 6113 */ 6114 public boolean isDragAcceleratorActive() { 6115 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 6116 } 6117 6118 public void onTouchModeChanged(boolean isInTouchMode) { 6119 if (!isInTouchMode) { 6120 hide(); 6121 } 6122 } 6123 6124 @Override 6125 public void onDetached() { 6126 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 6127 observer.removeOnTouchModeChangeListener(this); 6128 6129 if (mStartHandle != null) mStartHandle.onDetached(); 6130 if (mEndHandle != null) mEndHandle.onDetached(); 6131 } 6132 6133 @Override 6134 public boolean isActive() { 6135 return mStartHandle != null && mStartHandle.isShowing(); 6136 } 6137 6138 public void invalidateHandles() { 6139 if (mStartHandle != null) { 6140 mStartHandle.invalidate(); 6141 } 6142 if (mEndHandle != null) { 6143 mEndHandle.invalidate(); 6144 } 6145 } 6146 } 6147 6148 private class CorrectionHighlighter { 6149 private final Path mPath = new Path(); 6150 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 6151 private int mStart, mEnd; 6152 private long mFadingStartTime; 6153 private RectF mTempRectF; 6154 private static final int FADE_OUT_DURATION = 400; 6155 6156 public CorrectionHighlighter() { 6157 mPaint.setCompatibilityScaling( 6158 mTextView.getResources().getCompatibilityInfo().applicationScale); 6159 mPaint.setStyle(Paint.Style.FILL); 6160 } 6161 6162 public void highlight(CorrectionInfo info) { 6163 mStart = info.getOffset(); 6164 mEnd = mStart + info.getNewText().length(); 6165 mFadingStartTime = SystemClock.uptimeMillis(); 6166 6167 if (mStart < 0 || mEnd < 0) { 6168 stopAnimation(); 6169 } 6170 } 6171 6172 public void draw(Canvas canvas, int cursorOffsetVertical) { 6173 if (updatePath() && updatePaint()) { 6174 if (cursorOffsetVertical != 0) { 6175 canvas.translate(0, cursorOffsetVertical); 6176 } 6177 6178 canvas.drawPath(mPath, mPaint); 6179 6180 if (cursorOffsetVertical != 0) { 6181 canvas.translate(0, -cursorOffsetVertical); 6182 } 6183 invalidate(true); // TODO invalidate cursor region only 6184 } else { 6185 stopAnimation(); 6186 invalidate(false); // TODO invalidate cursor region only 6187 } 6188 } 6189 6190 private boolean updatePaint() { 6191 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 6192 if (duration > FADE_OUT_DURATION) return false; 6193 6194 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 6195 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 6196 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 6197 + ((int) (highlightColorAlpha * coef) << 24); 6198 mPaint.setColor(color); 6199 return true; 6200 } 6201 6202 private boolean updatePath() { 6203 final Layout layout = mTextView.getLayout(); 6204 if (layout == null) return false; 6205 6206 // Update in case text is edited while the animation is run 6207 final int length = mTextView.getText().length(); 6208 int start = Math.min(length, mStart); 6209 int end = Math.min(length, mEnd); 6210 6211 mPath.reset(); 6212 layout.getSelectionPath(start, end, mPath); 6213 return true; 6214 } 6215 6216 private void invalidate(boolean delayed) { 6217 if (mTextView.getLayout() == null) return; 6218 6219 if (mTempRectF == null) mTempRectF = new RectF(); 6220 mPath.computeBounds(mTempRectF, false); 6221 6222 int left = mTextView.getCompoundPaddingLeft(); 6223 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 6224 6225 if (delayed) { 6226 mTextView.postInvalidateOnAnimation( 6227 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 6228 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 6229 } else { 6230 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 6231 (int) mTempRectF.right, (int) mTempRectF.bottom); 6232 } 6233 } 6234 6235 private void stopAnimation() { 6236 Editor.this.mCorrectionHighlighter = null; 6237 } 6238 } 6239 6240 private static class ErrorPopup extends PopupWindow { 6241 private boolean mAbove = false; 6242 private final TextView mView; 6243 private int mPopupInlineErrorBackgroundId = 0; 6244 private int mPopupInlineErrorAboveBackgroundId = 0; 6245 6246 ErrorPopup(TextView v, int width, int height) { 6247 super(v, width, height); 6248 mView = v; 6249 // Make sure the TextView has a background set as it will be used the first time it is 6250 // shown and positioned. Initialized with below background, which should have 6251 // dimensions identical to the above version for this to work (and is more likely). 6252 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 6253 com.android.internal.R.styleable.Theme_errorMessageBackground); 6254 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 6255 } 6256 6257 void fixDirection(boolean above) { 6258 mAbove = above; 6259 6260 if (above) { 6261 mPopupInlineErrorAboveBackgroundId = 6262 getResourceId(mPopupInlineErrorAboveBackgroundId, 6263 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 6264 } else { 6265 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 6266 com.android.internal.R.styleable.Theme_errorMessageBackground); 6267 } 6268 6269 mView.setBackgroundResource( 6270 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 6271 } 6272 6273 private int getResourceId(int currentId, int index) { 6274 if (currentId == 0) { 6275 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 6276 R.styleable.Theme); 6277 currentId = styledAttributes.getResourceId(index, 0); 6278 styledAttributes.recycle(); 6279 } 6280 return currentId; 6281 } 6282 6283 @Override 6284 public void update(int x, int y, int w, int h, boolean force) { 6285 super.update(x, y, w, h, force); 6286 6287 boolean above = isAboveAnchor(); 6288 if (above != mAbove) { 6289 fixDirection(above); 6290 } 6291 } 6292 } 6293 6294 static class InputContentType { 6295 int imeOptions = EditorInfo.IME_NULL; 6296 String privateImeOptions; 6297 CharSequence imeActionLabel; 6298 int imeActionId; 6299 Bundle extras; 6300 OnEditorActionListener onEditorActionListener; 6301 boolean enterDown; 6302 LocaleList imeHintLocales; 6303 } 6304 6305 static class InputMethodState { 6306 ExtractedTextRequest mExtractedTextRequest; 6307 final ExtractedText mExtractedText = new ExtractedText(); 6308 int mBatchEditNesting; 6309 boolean mCursorChanged; 6310 boolean mSelectionModeChanged; 6311 boolean mContentChanged; 6312 int mChangedStart, mChangedEnd, mChangedDelta; 6313 } 6314 6315 /** 6316 * @return True iff (start, end) is a valid range within the text. 6317 */ 6318 private static boolean isValidRange(CharSequence text, int start, int end) { 6319 return 0 <= start && start <= end && end <= text.length(); 6320 } 6321 6322 @VisibleForTesting 6323 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 6324 return mSuggestionsPopupWindow; 6325 } 6326 6327 /** 6328 * An InputFilter that monitors text input to maintain undo history. It does not modify the 6329 * text being typed (and hence always returns null from the filter() method). 6330 * 6331 * TODO: Make this span aware. 6332 */ 6333 public static class UndoInputFilter implements InputFilter { 6334 private final Editor mEditor; 6335 6336 // Whether the current filter pass is directly caused by an end-user text edit. 6337 private boolean mIsUserEdit; 6338 6339 // Whether the text field is handling an IME composition. Must be parceled in case the user 6340 // rotates the screen during composition. 6341 private boolean mHasComposition; 6342 6343 // Whether the user is expanding or shortening the text 6344 private boolean mExpanding; 6345 6346 // Whether the previous edit operation was in the current batch edit. 6347 private boolean mPreviousOperationWasInSameBatchEdit; 6348 6349 public UndoInputFilter(Editor editor) { 6350 mEditor = editor; 6351 } 6352 6353 public void saveInstanceState(Parcel parcel) { 6354 parcel.writeInt(mIsUserEdit ? 1 : 0); 6355 parcel.writeInt(mHasComposition ? 1 : 0); 6356 parcel.writeInt(mExpanding ? 1 : 0); 6357 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 6358 } 6359 6360 public void restoreInstanceState(Parcel parcel) { 6361 mIsUserEdit = parcel.readInt() != 0; 6362 mHasComposition = parcel.readInt() != 0; 6363 mExpanding = parcel.readInt() != 0; 6364 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 6365 } 6366 6367 /** 6368 * Signals that a user-triggered edit is starting. 6369 */ 6370 public void beginBatchEdit() { 6371 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 6372 mIsUserEdit = true; 6373 } 6374 6375 public void endBatchEdit() { 6376 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 6377 mIsUserEdit = false; 6378 mPreviousOperationWasInSameBatchEdit = false; 6379 } 6380 6381 @Override 6382 public CharSequence filter(CharSequence source, int start, int end, 6383 Spanned dest, int dstart, int dend) { 6384 if (DEBUG_UNDO) { 6385 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 6386 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 6387 } 6388 6389 // Check to see if this edit should be tracked for undo. 6390 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 6391 return null; 6392 } 6393 6394 final boolean hadComposition = mHasComposition; 6395 mHasComposition = isComposition(source); 6396 final boolean wasExpanding = mExpanding; 6397 boolean shouldCreateSeparateState = false; 6398 if ((end - start) != (dend - dstart)) { 6399 mExpanding = (end - start) > (dend - dstart); 6400 if (hadComposition && mExpanding != wasExpanding) { 6401 shouldCreateSeparateState = true; 6402 } 6403 } 6404 6405 // Handle edit. 6406 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 6407 return null; 6408 } 6409 6410 void freezeLastEdit() { 6411 mEditor.mUndoManager.beginUpdate("Edit text"); 6412 EditOperation lastEdit = getLastEdit(); 6413 if (lastEdit != null) { 6414 lastEdit.mFrozen = true; 6415 } 6416 mEditor.mUndoManager.endUpdate(); 6417 } 6418 6419 @Retention(RetentionPolicy.SOURCE) 6420 @IntDef(prefix = { "MERGE_EDIT_MODE_" }, value = { 6421 MERGE_EDIT_MODE_FORCE_MERGE, 6422 MERGE_EDIT_MODE_NEVER_MERGE, 6423 MERGE_EDIT_MODE_NORMAL 6424 }) 6425 private @interface MergeMode {} 6426 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 6427 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 6428 /** Use {@link EditOperation#mergeWith} to merge */ 6429 private static final int MERGE_EDIT_MODE_NORMAL = 2; 6430 6431 private void handleEdit(CharSequence source, int start, int end, 6432 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 6433 // An application may install a TextWatcher to provide additional modifications after 6434 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 6435 // string). This results in multiple filter() calls for what the user considers to be 6436 // a single operation. Always undo the whole set of changes in one step. 6437 @MergeMode 6438 final int mergeMode; 6439 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 6440 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 6441 } else if (shouldCreateSeparateState) { 6442 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 6443 } else { 6444 mergeMode = MERGE_EDIT_MODE_NORMAL; 6445 } 6446 // Build a new operation with all the information from this edit. 6447 String newText = TextUtils.substring(source, start, end); 6448 String oldText = TextUtils.substring(dest, dstart, dend); 6449 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 6450 mHasComposition); 6451 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 6452 return; 6453 } 6454 recordEdit(edit, mergeMode); 6455 } 6456 6457 private EditOperation getLastEdit() { 6458 final UndoManager um = mEditor.mUndoManager; 6459 return um.getLastOperation( 6460 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 6461 } 6462 /** 6463 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 6464 * If forceMerge is true then the new edit is always merged. 6465 */ 6466 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 6467 // Fetch the last edit operation and attempt to merge in the new edit. 6468 final UndoManager um = mEditor.mUndoManager; 6469 um.beginUpdate("Edit text"); 6470 EditOperation lastEdit = getLastEdit(); 6471 if (lastEdit == null) { 6472 // Add this as the first edit. 6473 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 6474 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6475 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 6476 // Forced merges take priority because they could be the result of a non-user-edit 6477 // change and this case should not create a new undo operation. 6478 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 6479 lastEdit.forceMergeWith(edit); 6480 } else if (!mIsUserEdit) { 6481 // An application directly modified the Editable outside of a text edit. Treat this 6482 // as a new change and don't attempt to merge. 6483 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 6484 um.commitState(mEditor.mUndoOwner); 6485 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6486 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 6487 // Merge succeeded, nothing else to do. 6488 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 6489 } else { 6490 // Could not merge with the last edit, so commit the last edit and add this edit. 6491 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 6492 um.commitState(mEditor.mUndoOwner); 6493 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6494 } 6495 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 6496 um.endUpdate(); 6497 } 6498 6499 private boolean canUndoEdit(CharSequence source, int start, int end, 6500 Spanned dest, int dstart, int dend) { 6501 if (!mEditor.mAllowUndo) { 6502 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 6503 return false; 6504 } 6505 6506 if (mEditor.mUndoManager.isInUndo()) { 6507 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 6508 return false; 6509 } 6510 6511 // Text filters run before input operations are applied. However, some input operations 6512 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6513 // attempt to undo invalid operations. 6514 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6515 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6516 return false; 6517 } 6518 6519 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6520 // on an input field. Skip no-op changes. 6521 if (start == end && dstart == dend) { 6522 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6523 return false; 6524 } 6525 6526 return true; 6527 } 6528 6529 private static boolean isComposition(CharSequence source) { 6530 if (!(source instanceof Spannable)) { 6531 return false; 6532 } 6533 // This is a composition edit if the source has a non-zero-length composing span. 6534 Spannable text = (Spannable) source; 6535 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6536 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6537 return composeBegin < composeEnd; 6538 } 6539 6540 private boolean isInTextWatcher() { 6541 CharSequence text = mEditor.mTextView.getText(); 6542 return (text instanceof SpannableStringBuilder) 6543 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6544 } 6545 } 6546 6547 /** 6548 * An operation to undo a single "edit" to a text view. 6549 */ 6550 public static class EditOperation extends UndoOperation<Editor> { 6551 private static final int TYPE_INSERT = 0; 6552 private static final int TYPE_DELETE = 1; 6553 private static final int TYPE_REPLACE = 2; 6554 6555 private int mType; 6556 private String mOldText; 6557 private String mNewText; 6558 private int mStart; 6559 6560 private int mOldCursorPos; 6561 private int mNewCursorPos; 6562 private boolean mFrozen; 6563 private boolean mIsComposition; 6564 6565 /** 6566 * Constructs an edit operation from a text input operation on editor that replaces the 6567 * oldText starting at dstart with newText. 6568 */ 6569 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6570 boolean isComposition) { 6571 super(editor.mUndoOwner); 6572 mOldText = oldText; 6573 mNewText = newText; 6574 6575 // Determine the type of the edit. 6576 if (mNewText.length() > 0 && mOldText.length() == 0) { 6577 mType = TYPE_INSERT; 6578 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6579 mType = TYPE_DELETE; 6580 } else { 6581 mType = TYPE_REPLACE; 6582 } 6583 6584 mStart = dstart; 6585 // Store cursor data. 6586 mOldCursorPos = editor.mTextView.getSelectionStart(); 6587 mNewCursorPos = dstart + mNewText.length(); 6588 mIsComposition = isComposition; 6589 } 6590 6591 public EditOperation(Parcel src, ClassLoader loader) { 6592 super(src, loader); 6593 mType = src.readInt(); 6594 mOldText = src.readString(); 6595 mNewText = src.readString(); 6596 mStart = src.readInt(); 6597 mOldCursorPos = src.readInt(); 6598 mNewCursorPos = src.readInt(); 6599 mFrozen = src.readInt() == 1; 6600 mIsComposition = src.readInt() == 1; 6601 } 6602 6603 @Override 6604 public void writeToParcel(Parcel dest, int flags) { 6605 dest.writeInt(mType); 6606 dest.writeString(mOldText); 6607 dest.writeString(mNewText); 6608 dest.writeInt(mStart); 6609 dest.writeInt(mOldCursorPos); 6610 dest.writeInt(mNewCursorPos); 6611 dest.writeInt(mFrozen ? 1 : 0); 6612 dest.writeInt(mIsComposition ? 1 : 0); 6613 } 6614 6615 private int getNewTextEnd() { 6616 return mStart + mNewText.length(); 6617 } 6618 6619 private int getOldTextEnd() { 6620 return mStart + mOldText.length(); 6621 } 6622 6623 @Override 6624 public void commit() { 6625 } 6626 6627 @Override 6628 public void undo() { 6629 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6630 // Remove the new text and insert the old. 6631 Editor editor = getOwnerData(); 6632 Editable text = (Editable) editor.mTextView.getText(); 6633 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6634 } 6635 6636 @Override 6637 public void redo() { 6638 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6639 // Remove the old text and insert the new. 6640 Editor editor = getOwnerData(); 6641 Editable text = (Editable) editor.mTextView.getText(); 6642 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6643 } 6644 6645 /** 6646 * Attempts to merge this existing operation with a new edit. 6647 * @param edit The new edit operation. 6648 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6649 * object unchanged. 6650 */ 6651 private boolean mergeWith(EditOperation edit) { 6652 if (DEBUG_UNDO) { 6653 Log.d(TAG, "mergeWith old " + this); 6654 Log.d(TAG, "mergeWith new " + edit); 6655 } 6656 6657 if (mFrozen) { 6658 return false; 6659 } 6660 6661 switch (mType) { 6662 case TYPE_INSERT: 6663 return mergeInsertWith(edit); 6664 case TYPE_DELETE: 6665 return mergeDeleteWith(edit); 6666 case TYPE_REPLACE: 6667 return mergeReplaceWith(edit); 6668 default: 6669 return false; 6670 } 6671 } 6672 6673 private boolean mergeInsertWith(EditOperation edit) { 6674 if (edit.mType == TYPE_INSERT) { 6675 // Merge insertions that are contiguous even when it's frozen. 6676 if (getNewTextEnd() != edit.mStart) { 6677 return false; 6678 } 6679 mNewText += edit.mNewText; 6680 mNewCursorPos = edit.mNewCursorPos; 6681 mFrozen = edit.mFrozen; 6682 mIsComposition = edit.mIsComposition; 6683 return true; 6684 } 6685 if (mIsComposition && edit.mType == TYPE_REPLACE 6686 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6687 // Merge insertion with replace as they can be single insertion. 6688 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6689 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6690 mNewCursorPos = edit.mNewCursorPos; 6691 mIsComposition = edit.mIsComposition; 6692 return true; 6693 } 6694 return false; 6695 } 6696 6697 // TODO: Support forward delete. 6698 private boolean mergeDeleteWith(EditOperation edit) { 6699 // Only merge continuous deletes. 6700 if (edit.mType != TYPE_DELETE) { 6701 return false; 6702 } 6703 // Only merge deletions that are contiguous. 6704 if (mStart != edit.getOldTextEnd()) { 6705 return false; 6706 } 6707 mStart = edit.mStart; 6708 mOldText = edit.mOldText + mOldText; 6709 mNewCursorPos = edit.mNewCursorPos; 6710 mIsComposition = edit.mIsComposition; 6711 return true; 6712 } 6713 6714 private boolean mergeReplaceWith(EditOperation edit) { 6715 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6716 // Merge with adjacent insert. 6717 mNewText += edit.mNewText; 6718 mNewCursorPos = edit.mNewCursorPos; 6719 return true; 6720 } 6721 if (!mIsComposition) { 6722 return false; 6723 } 6724 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6725 && getNewTextEnd() >= edit.getOldTextEnd()) { 6726 // Merge with delete as they can be single operation. 6727 mNewText = mNewText.substring(0, edit.mStart - mStart) 6728 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6729 if (mNewText.isEmpty()) { 6730 mType = TYPE_DELETE; 6731 } 6732 mNewCursorPos = edit.mNewCursorPos; 6733 mIsComposition = edit.mIsComposition; 6734 return true; 6735 } 6736 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6737 && TextUtils.equals(mNewText, edit.mOldText)) { 6738 // Merge with the replace that replaces the same region. 6739 mNewText = edit.mNewText; 6740 mNewCursorPos = edit.mNewCursorPos; 6741 mIsComposition = edit.mIsComposition; 6742 return true; 6743 } 6744 return false; 6745 } 6746 6747 /** 6748 * Forcibly creates a single merged edit operation by simulating the entire text 6749 * contents being replaced. 6750 */ 6751 public void forceMergeWith(EditOperation edit) { 6752 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6753 if (mergeWith(edit)) { 6754 return; 6755 } 6756 Editor editor = getOwnerData(); 6757 6758 // Copy the text of the current field. 6759 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6760 // but would require two parallel implementations of modifyText() because Editable and 6761 // StringBuilder do not share an interface for replace/delete/insert. 6762 Editable editable = (Editable) editor.mTextView.getText(); 6763 Editable originalText = new SpannableStringBuilder(editable.toString()); 6764 6765 // Roll back the last operation. 6766 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6767 6768 // Clone the text again and apply the new operation. 6769 Editable finalText = new SpannableStringBuilder(editable.toString()); 6770 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6771 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6772 6773 // Convert this operation into a replace operation. 6774 mType = TYPE_REPLACE; 6775 mNewText = finalText.toString(); 6776 mOldText = originalText.toString(); 6777 mStart = 0; 6778 mNewCursorPos = edit.mNewCursorPos; 6779 mIsComposition = edit.mIsComposition; 6780 // mOldCursorPos is unchanged. 6781 } 6782 6783 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6784 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6785 // Apply the edit if it is still valid. 6786 if (isValidRange(text, deleteFrom, deleteTo) 6787 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6788 if (deleteFrom != deleteTo) { 6789 text.delete(deleteFrom, deleteTo); 6790 } 6791 if (newText.length() != 0) { 6792 text.insert(newTextInsertAt, newText); 6793 } 6794 } 6795 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6796 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6797 // TODO: Select all the text that was undone. 6798 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6799 Selection.setSelection(text, newCursorPos); 6800 } 6801 } 6802 6803 private String getTypeString() { 6804 switch (mType) { 6805 case TYPE_INSERT: 6806 return "insert"; 6807 case TYPE_DELETE: 6808 return "delete"; 6809 case TYPE_REPLACE: 6810 return "replace"; 6811 default: 6812 return ""; 6813 } 6814 } 6815 6816 @Override 6817 public String toString() { 6818 return "[mType=" + getTypeString() + ", " 6819 + "mOldText=" + mOldText + ", " 6820 + "mNewText=" + mNewText + ", " 6821 + "mStart=" + mStart + ", " 6822 + "mOldCursorPos=" + mOldCursorPos + ", " 6823 + "mNewCursorPos=" + mNewCursorPos + ", " 6824 + "mFrozen=" + mFrozen + ", " 6825 + "mIsComposition=" + mIsComposition + "]"; 6826 } 6827 6828 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6829 new Parcelable.ClassLoaderCreator<EditOperation>() { 6830 @Override 6831 public EditOperation createFromParcel(Parcel in) { 6832 return new EditOperation(in, null); 6833 } 6834 6835 @Override 6836 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6837 return new EditOperation(in, loader); 6838 } 6839 6840 @Override 6841 public EditOperation[] newArray(int size) { 6842 return new EditOperation[size]; 6843 } 6844 }; 6845 } 6846 6847 /** 6848 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6849 * These allow external applications to plug into currently selected text. 6850 */ 6851 static final class ProcessTextIntentActionsHandler { 6852 6853 private final Editor mEditor; 6854 private final TextView mTextView; 6855 private final Context mContext; 6856 private final PackageManager mPackageManager; 6857 private final String mPackageName; 6858 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6859 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6860 new SparseArray<>(); 6861 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6862 6863 private ProcessTextIntentActionsHandler(Editor editor) { 6864 mEditor = Preconditions.checkNotNull(editor); 6865 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6866 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6867 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6868 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6869 } 6870 6871 /** 6872 * Adds "PROCESS_TEXT" menu items to the specified menu. 6873 */ 6874 public void onInitializeMenu(Menu menu) { 6875 loadSupportedActivities(); 6876 final int size = mSupportedActivities.size(); 6877 for (int i = 0; i < size; i++) { 6878 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6879 menu.add(Menu.NONE, Menu.NONE, 6880 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i, 6881 getLabel(resolveInfo)) 6882 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6883 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 6884 } 6885 } 6886 6887 /** 6888 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6889 * menu item. 6890 * 6891 * @return True if the action was performed, false otherwise. 6892 */ 6893 public boolean performMenuItemAction(MenuItem item) { 6894 return fireIntent(item.getIntent()); 6895 } 6896 6897 /** 6898 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6899 */ 6900 public void initializeAccessibilityActions() { 6901 mAccessibilityIntents.clear(); 6902 mAccessibilityActions.clear(); 6903 int i = 0; 6904 loadSupportedActivities(); 6905 for (ResolveInfo resolveInfo : mSupportedActivities) { 6906 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6907 mAccessibilityActions.put( 6908 actionId, 6909 new AccessibilityNodeInfo.AccessibilityAction( 6910 actionId, getLabel(resolveInfo))); 6911 mAccessibilityIntents.put( 6912 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6913 } 6914 } 6915 6916 /** 6917 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6918 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6919 * latest accessibility actions available for this call. 6920 */ 6921 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6922 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6923 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6924 } 6925 } 6926 6927 /** 6928 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6929 * accessibility action id. 6930 * 6931 * @return True if the action was performed, false otherwise. 6932 */ 6933 public boolean performAccessibilityAction(int actionId) { 6934 return fireIntent(mAccessibilityIntents.get(actionId)); 6935 } 6936 6937 private boolean fireIntent(Intent intent) { 6938 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6939 String selectedText = mTextView.getSelectedText(); 6940 selectedText = TextUtils.trimToParcelableSize(selectedText); 6941 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, selectedText); 6942 mEditor.mPreserveSelection = true; 6943 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6944 return true; 6945 } 6946 return false; 6947 } 6948 6949 private void loadSupportedActivities() { 6950 mSupportedActivities.clear(); 6951 if (!mContext.canStartActivityForResult()) { 6952 return; 6953 } 6954 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6955 List<ResolveInfo> unfiltered = 6956 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6957 for (ResolveInfo info : unfiltered) { 6958 if (isSupportedActivity(info)) { 6959 mSupportedActivities.add(info); 6960 } 6961 } 6962 } 6963 6964 private boolean isSupportedActivity(ResolveInfo info) { 6965 return mPackageName.equals(info.activityInfo.packageName) 6966 || info.activityInfo.exported 6967 && (info.activityInfo.permission == null 6968 || mContext.checkSelfPermission(info.activityInfo.permission) 6969 == PackageManager.PERMISSION_GRANTED); 6970 } 6971 6972 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6973 return createProcessTextIntent() 6974 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6975 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6976 } 6977 6978 private Intent createProcessTextIntent() { 6979 return new Intent() 6980 .setAction(Intent.ACTION_PROCESS_TEXT) 6981 .setType("text/plain"); 6982 } 6983 6984 private CharSequence getLabel(ResolveInfo resolveInfo) { 6985 return resolveInfo.loadLabel(mPackageManager); 6986 } 6987 } 6988} 6989