Editor.java revision 2f229ca27bf463bb76c7b2663b90057aa25ad883
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.annotation.IntDef; 21import android.annotation.Nullable; 22import android.app.PendingIntent; 23import android.app.PendingIntent.CanceledException; 24import android.content.ClipData; 25import android.content.ClipData.Item; 26import android.content.Context; 27import android.content.Intent; 28import android.content.UndoManager; 29import android.content.UndoOperation; 30import android.content.UndoOwner; 31import android.content.pm.PackageManager; 32import android.content.pm.ResolveInfo; 33import android.content.res.TypedArray; 34import android.graphics.Canvas; 35import android.graphics.Color; 36import android.graphics.Matrix; 37import android.graphics.Paint; 38import android.graphics.Path; 39import android.graphics.Rect; 40import android.graphics.RectF; 41import android.graphics.drawable.ColorDrawable; 42import android.graphics.drawable.Drawable; 43import android.os.Bundle; 44import android.os.Parcel; 45import android.os.Parcelable; 46import android.os.ParcelableParcel; 47import android.os.SystemClock; 48import android.provider.Settings; 49import android.text.DynamicLayout; 50import android.text.Editable; 51import android.text.InputFilter; 52import android.text.InputType; 53import android.text.Layout; 54import android.text.ParcelableSpan; 55import android.text.Selection; 56import android.text.SpanWatcher; 57import android.text.Spannable; 58import android.text.SpannableStringBuilder; 59import android.text.Spanned; 60import android.text.StaticLayout; 61import android.text.TextUtils; 62import android.text.method.KeyListener; 63import android.text.method.MetaKeyKeyListener; 64import android.text.method.MovementMethod; 65import android.text.method.WordIterator; 66import android.text.style.EasyEditSpan; 67import android.text.style.SuggestionRangeSpan; 68import android.text.style.SuggestionSpan; 69import android.text.style.TextAppearanceSpan; 70import android.text.style.URLSpan; 71import android.util.DisplayMetrics; 72import android.util.LocaleList; 73import android.util.Log; 74import android.util.SparseArray; 75import android.view.ActionMode; 76import android.view.ActionMode.Callback; 77import android.view.ContextMenu; 78import android.view.DisplayListCanvas; 79import android.view.DragEvent; 80import android.view.DropPermissions; 81import android.view.Gravity; 82import android.view.InputDevice; 83import android.view.LayoutInflater; 84import android.view.Menu; 85import android.view.MenuItem; 86import android.view.MotionEvent; 87import android.view.RenderNode; 88import android.view.SubMenu; 89import android.view.View; 90import android.view.View.DragShadowBuilder; 91import android.view.View.OnClickListener; 92import android.view.ViewConfiguration; 93import android.view.ViewGroup; 94import android.view.ViewGroup.LayoutParams; 95import android.view.ViewParent; 96import android.view.ViewTreeObserver; 97import android.view.WindowManager; 98import android.view.accessibility.AccessibilityNodeInfo; 99import android.view.inputmethod.CorrectionInfo; 100import android.view.inputmethod.CursorAnchorInfo; 101import android.view.inputmethod.EditorInfo; 102import android.view.inputmethod.ExtractedText; 103import android.view.inputmethod.ExtractedTextRequest; 104import android.view.inputmethod.InputConnection; 105import android.view.inputmethod.InputMethodManager; 106import android.widget.AdapterView.OnItemClickListener; 107import android.widget.TextView.Drawables; 108import android.widget.TextView.OnEditorActionListener; 109 110import com.android.internal.annotations.VisibleForTesting; 111import com.android.internal.util.ArrayUtils; 112import com.android.internal.util.GrowingArrayUtils; 113import com.android.internal.util.Preconditions; 114import com.android.internal.widget.EditableInputConnection; 115 116import java.lang.annotation.Retention; 117import java.lang.annotation.RetentionPolicy; 118import java.text.BreakIterator; 119import java.util.Arrays; 120import java.util.Comparator; 121import java.util.HashMap; 122import java.util.List; 123 124 125/** 126 * Helper class used by TextView to handle editable text views. 127 * 128 * @hide 129 */ 130public class Editor { 131 private static final String TAG = "Editor"; 132 private static final boolean DEBUG_UNDO = false; 133 134 static final int BLINK = 500; 135 private static final float[] TEMP_POSITION = new float[2]; 136 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 137 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 138 private static final int UNSET_X_VALUE = -1; 139 private static final int UNSET_LINE = -1; 140 // Tag used when the Editor maintains its own separate UndoManager. 141 private static final String UNDO_OWNER_TAG = "Editor"; 142 143 // Ordering constants used to place the Action Mode or context menu items in their menu. 144 private static final int MENU_ITEM_ORDER_UNDO = 1; 145 private static final int MENU_ITEM_ORDER_REDO = 2; 146 private static final int MENU_ITEM_ORDER_CUT = 3; 147 private static final int MENU_ITEM_ORDER_COPY = 4; 148 private static final int MENU_ITEM_ORDER_PASTE = 5; 149 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 6; 150 private static final int MENU_ITEM_ORDER_SHARE = 7; 151 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 152 private static final int MENU_ITEM_ORDER_REPLACE = 9; 153 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 10; 154 155 // Each Editor manages its own undo stack. 156 private final UndoManager mUndoManager = new UndoManager(); 157 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 158 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 159 boolean mAllowUndo = true; 160 161 // Cursor Controllers. 162 InsertionPointCursorController mInsertionPointCursorController; 163 SelectionModifierCursorController mSelectionModifierCursorController; 164 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 165 ActionMode mTextActionMode; 166 boolean mInsertionControllerEnabled; 167 boolean mSelectionControllerEnabled; 168 169 // Used to highlight a word when it is corrected by the IME 170 CorrectionHighlighter mCorrectionHighlighter; 171 172 InputContentType mInputContentType; 173 InputMethodState mInputMethodState; 174 175 private static class TextRenderNode { 176 RenderNode renderNode; 177 boolean isDirty; 178 public TextRenderNode(String name) { 179 isDirty = true; 180 renderNode = RenderNode.create(name, null); 181 } 182 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 183 } 184 TextRenderNode[] mTextRenderNodes; 185 186 boolean mFrozenWithFocus; 187 boolean mSelectionMoved; 188 boolean mTouchFocusSelected; 189 190 KeyListener mKeyListener; 191 int mInputType = EditorInfo.TYPE_NULL; 192 193 boolean mDiscardNextActionUp; 194 boolean mIgnoreActionUpEvent; 195 private boolean mIgnoreNextMouseActionUpOrDown; 196 197 long mShowCursor; 198 Blink mBlink; 199 200 boolean mCursorVisible = true; 201 boolean mSelectAllOnFocus; 202 boolean mTextIsSelectable; 203 204 CharSequence mError; 205 boolean mErrorWasChanged; 206 ErrorPopup mErrorPopup; 207 208 /** 209 * This flag is set if the TextView tries to display an error before it 210 * is attached to the window (so its position is still unknown). 211 * It causes the error to be shown later, when onAttachedToWindow() 212 * is called. 213 */ 214 boolean mShowErrorAfterAttach; 215 216 boolean mInBatchEditControllers; 217 boolean mShowSoftInputOnFocus = true; 218 boolean mPreserveDetachedSelection; 219 boolean mTemporaryDetach; 220 221 boolean mIsBeingLongClicked; 222 223 SuggestionsPopupWindow mSuggestionsPopupWindow; 224 SuggestionRangeSpan mSuggestionRangeSpan; 225 Runnable mShowSuggestionRunnable; 226 227 final Drawable[] mCursorDrawable = new Drawable[2]; 228 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 229 230 private Drawable mSelectHandleLeft; 231 private Drawable mSelectHandleRight; 232 private Drawable mSelectHandleCenter; 233 234 // Global listener that detects changes in the global position of the TextView 235 private PositionListener mPositionListener; 236 237 float mLastDownPositionX, mLastDownPositionY; 238 private float mContextMenuAnchorX, mContextMenuAnchorY; 239 Callback mCustomSelectionActionModeCallback; 240 Callback mCustomInsertionActionModeCallback; 241 242 // Set when this TextView gained focus with some text selected. Will start selection mode. 243 boolean mCreatedWithASelection; 244 245 // Indicates the current tap state (first tap, double tap, or triple click). 246 private int mTapState = TAP_STATE_INITIAL; 247 private long mLastTouchUpTime = 0; 248 private static final int TAP_STATE_INITIAL = 0; 249 private static final int TAP_STATE_FIRST_TAP = 1; 250 private static final int TAP_STATE_DOUBLE_TAP = 2; 251 // Only for mouse input. 252 private static final int TAP_STATE_TRIPLE_CLICK = 3; 253 254 // The button state as of the last time #onTouchEvent is called. 255 private int mLastButtonState; 256 257 private Runnable mInsertionActionModeRunnable; 258 259 // The span controller helps monitoring the changes to which the Editor needs to react: 260 // - EasyEditSpans, for which we have some UI to display on attach and on hide 261 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 262 private SpanController mSpanController; 263 264 WordIterator mWordIterator; 265 SpellChecker mSpellChecker; 266 267 // This word iterator is set with text and used to determine word boundaries 268 // when a user is selecting text. 269 private WordIterator mWordIteratorWithText; 270 // Indicate that the text in the word iterator needs to be updated. 271 private boolean mUpdateWordIteratorText; 272 273 private Rect mTempRect; 274 275 private TextView mTextView; 276 277 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 278 279 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 280 281 private final Runnable mShowFloatingToolbar = new Runnable() { 282 @Override 283 public void run() { 284 if (mTextActionMode != null) { 285 mTextActionMode.hide(0); // hide off. 286 } 287 } 288 }; 289 290 boolean mIsInsertionActionModeStartPending = false; 291 292 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 293 private SuggestionInfo[] mSuggestionInfosInContextMenu; 294 295 Editor(TextView textView) { 296 mTextView = textView; 297 // Synchronize the filter list, which places the undo input filter at the end. 298 mTextView.setFilters(mTextView.getFilters()); 299 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 300 } 301 302 ParcelableParcel saveInstanceState() { 303 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 304 Parcel parcel = state.getParcel(); 305 mUndoManager.saveInstanceState(parcel); 306 mUndoInputFilter.saveInstanceState(parcel); 307 return state; 308 } 309 310 void restoreInstanceState(ParcelableParcel state) { 311 Parcel parcel = state.getParcel(); 312 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 313 mUndoInputFilter.restoreInstanceState(parcel); 314 // Re-associate this object as the owner of undo state. 315 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 316 } 317 318 /** 319 * Forgets all undo and redo operations for this Editor. 320 */ 321 void forgetUndoRedo() { 322 UndoOwner[] owners = { mUndoOwner }; 323 mUndoManager.forgetUndos(owners, -1 /* all */); 324 mUndoManager.forgetRedos(owners, -1 /* all */); 325 } 326 327 boolean canUndo() { 328 UndoOwner[] owners = { mUndoOwner }; 329 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 330 } 331 332 boolean canRedo() { 333 UndoOwner[] owners = { mUndoOwner }; 334 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 335 } 336 337 void undo() { 338 if (!mAllowUndo) { 339 return; 340 } 341 UndoOwner[] owners = { mUndoOwner }; 342 mUndoManager.undo(owners, 1); // Undo 1 action. 343 } 344 345 void redo() { 346 if (!mAllowUndo) { 347 return; 348 } 349 UndoOwner[] owners = { mUndoOwner }; 350 mUndoManager.redo(owners, 1); // Redo 1 action. 351 } 352 353 void replace() { 354 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 355 stopTextActionMode(); 356 Selection.setSelection((Spannable) mTextView.getText(), middle); 357 showSuggestions(); 358 } 359 360 void onAttachedToWindow() { 361 if (mShowErrorAfterAttach) { 362 showError(); 363 mShowErrorAfterAttach = false; 364 } 365 mTemporaryDetach = false; 366 367 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 368 // No need to create the controller. 369 // The get method will add the listener on controller creation. 370 if (mInsertionPointCursorController != null) { 371 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 372 } 373 if (mSelectionModifierCursorController != null) { 374 mSelectionModifierCursorController.resetTouchOffsets(); 375 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 376 } 377 updateSpellCheckSpans(0, mTextView.getText().length(), 378 true /* create the spell checker if needed */); 379 380 if (mTextView.hasTransientState() && 381 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 382 // Since transient state is reference counted make sure it stays matched 383 // with our own calls to it for managing selection. 384 // The action mode callback will set this back again when/if the action mode starts. 385 mTextView.setHasTransientState(false); 386 387 // We had an active selection from before, start the selection mode. 388 startSelectionActionMode(); 389 } 390 391 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 392 resumeBlink(); 393 } 394 395 void onDetachedFromWindow() { 396 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 397 398 if (mError != null) { 399 hideError(); 400 } 401 402 suspendBlink(); 403 404 if (mInsertionPointCursorController != null) { 405 mInsertionPointCursorController.onDetached(); 406 } 407 408 if (mSelectionModifierCursorController != null) { 409 mSelectionModifierCursorController.onDetached(); 410 } 411 412 if (mShowSuggestionRunnable != null) { 413 mTextView.removeCallbacks(mShowSuggestionRunnable); 414 } 415 416 // Cancel the single tap delayed runnable. 417 if (mInsertionActionModeRunnable != null) { 418 mTextView.removeCallbacks(mInsertionActionModeRunnable); 419 } 420 421 mTextView.removeCallbacks(mShowFloatingToolbar); 422 423 discardTextDisplayLists(); 424 425 if (mSpellChecker != null) { 426 mSpellChecker.closeSession(); 427 // Forces the creation of a new SpellChecker next time this window is created. 428 // Will handle the cases where the settings has been changed in the meantime. 429 mSpellChecker = null; 430 } 431 432 mPreserveDetachedSelection = true; 433 hideCursorAndSpanControllers(); 434 stopTextActionMode(); 435 mPreserveDetachedSelection = false; 436 mTemporaryDetach = false; 437 } 438 439 private void discardTextDisplayLists() { 440 if (mTextRenderNodes != null) { 441 for (int i = 0; i < mTextRenderNodes.length; i++) { 442 RenderNode displayList = mTextRenderNodes[i] != null 443 ? mTextRenderNodes[i].renderNode : null; 444 if (displayList != null && displayList.isValid()) { 445 displayList.discardDisplayList(); 446 } 447 } 448 } 449 } 450 451 private void showError() { 452 if (mTextView.getWindowToken() == null) { 453 mShowErrorAfterAttach = true; 454 return; 455 } 456 457 if (mErrorPopup == null) { 458 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 459 final TextView err = (TextView) inflater.inflate( 460 com.android.internal.R.layout.textview_hint, null); 461 462 final float scale = mTextView.getResources().getDisplayMetrics().density; 463 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 464 mErrorPopup.setFocusable(false); 465 // The user is entering text, so the input method is needed. We 466 // don't want the popup to be displayed on top of it. 467 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 468 } 469 470 TextView tv = (TextView) mErrorPopup.getContentView(); 471 chooseSize(mErrorPopup, mError, tv); 472 tv.setText(mError); 473 474 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 475 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 476 } 477 478 public void setError(CharSequence error, Drawable icon) { 479 mError = TextUtils.stringOrSpannedString(error); 480 mErrorWasChanged = true; 481 482 if (mError == null) { 483 setErrorIcon(null); 484 if (mErrorPopup != null) { 485 if (mErrorPopup.isShowing()) { 486 mErrorPopup.dismiss(); 487 } 488 489 mErrorPopup = null; 490 } 491 mShowErrorAfterAttach = false; 492 } else { 493 setErrorIcon(icon); 494 if (mTextView.isFocused()) { 495 showError(); 496 } 497 } 498 } 499 500 private void setErrorIcon(Drawable icon) { 501 Drawables dr = mTextView.mDrawables; 502 if (dr == null) { 503 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 504 } 505 dr.setErrorDrawable(icon, mTextView); 506 507 mTextView.resetResolvedDrawables(); 508 mTextView.invalidate(); 509 mTextView.requestLayout(); 510 } 511 512 private void hideError() { 513 if (mErrorPopup != null) { 514 if (mErrorPopup.isShowing()) { 515 mErrorPopup.dismiss(); 516 } 517 } 518 519 mShowErrorAfterAttach = false; 520 } 521 522 /** 523 * Returns the X offset to make the pointy top of the error point 524 * at the middle of the error icon. 525 */ 526 private int getErrorX() { 527 /* 528 * The "25" is the distance between the point and the right edge 529 * of the background 530 */ 531 final float scale = mTextView.getResources().getDisplayMetrics().density; 532 533 final Drawables dr = mTextView.mDrawables; 534 535 final int layoutDirection = mTextView.getLayoutDirection(); 536 int errorX; 537 int offset; 538 switch (layoutDirection) { 539 default: 540 case View.LAYOUT_DIRECTION_LTR: 541 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 542 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 543 mTextView.getPaddingRight() + offset; 544 break; 545 case View.LAYOUT_DIRECTION_RTL: 546 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 547 errorX = mTextView.getPaddingLeft() + offset; 548 break; 549 } 550 return errorX; 551 } 552 553 /** 554 * Returns the Y offset to make the pointy top of the error point 555 * at the bottom of the error icon. 556 */ 557 private int getErrorY() { 558 /* 559 * Compound, not extended, because the icon is not clipped 560 * if the text height is smaller. 561 */ 562 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 563 int vspace = mTextView.getBottom() - mTextView.getTop() - 564 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 565 566 final Drawables dr = mTextView.mDrawables; 567 568 final int layoutDirection = mTextView.getLayoutDirection(); 569 int height; 570 switch (layoutDirection) { 571 default: 572 case View.LAYOUT_DIRECTION_LTR: 573 height = (dr != null ? dr.mDrawableHeightRight : 0); 574 break; 575 case View.LAYOUT_DIRECTION_RTL: 576 height = (dr != null ? dr.mDrawableHeightLeft : 0); 577 break; 578 } 579 580 int icontop = compoundPaddingTop + (vspace - height) / 2; 581 582 /* 583 * The "2" is the distance between the point and the top edge 584 * of the background. 585 */ 586 final float scale = mTextView.getResources().getDisplayMetrics().density; 587 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 588 } 589 590 void createInputContentTypeIfNeeded() { 591 if (mInputContentType == null) { 592 mInputContentType = new InputContentType(); 593 } 594 } 595 596 void createInputMethodStateIfNeeded() { 597 if (mInputMethodState == null) { 598 mInputMethodState = new InputMethodState(); 599 } 600 } 601 602 boolean isCursorVisible() { 603 // The default value is true, even when there is no associated Editor 604 return mCursorVisible && mTextView.isTextEditable(); 605 } 606 607 void prepareCursorControllers() { 608 boolean windowSupportsHandles = false; 609 610 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 611 if (params instanceof WindowManager.LayoutParams) { 612 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 613 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 614 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 615 } 616 617 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 618 mInsertionControllerEnabled = enabled && isCursorVisible(); 619 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 620 621 if (!mInsertionControllerEnabled) { 622 hideInsertionPointCursorController(); 623 if (mInsertionPointCursorController != null) { 624 mInsertionPointCursorController.onDetached(); 625 mInsertionPointCursorController = null; 626 } 627 } 628 629 if (!mSelectionControllerEnabled) { 630 stopTextActionMode(); 631 if (mSelectionModifierCursorController != null) { 632 mSelectionModifierCursorController.onDetached(); 633 mSelectionModifierCursorController = null; 634 } 635 } 636 } 637 638 void hideInsertionPointCursorController() { 639 if (mInsertionPointCursorController != null) { 640 mInsertionPointCursorController.hide(); 641 } 642 } 643 644 /** 645 * Hides the insertion and span controllers. 646 */ 647 void hideCursorAndSpanControllers() { 648 hideCursorControllers(); 649 hideSpanControllers(); 650 } 651 652 private void hideSpanControllers() { 653 if (mSpanController != null) { 654 mSpanController.hide(); 655 } 656 } 657 658 private void hideCursorControllers() { 659 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 660 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 661 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 662 // to distinguish one from the other. 663 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) || 664 !mSuggestionsPopupWindow.isShowingUp())) { 665 // Should be done before hide insertion point controller since it triggers a show of it 666 mSuggestionsPopupWindow.hide(); 667 } 668 hideInsertionPointCursorController(); 669 } 670 671 /** 672 * Create new SpellCheckSpans on the modified region. 673 */ 674 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 675 // Remove spans whose adjacent characters are text not punctuation 676 mTextView.removeAdjacentSuggestionSpans(start); 677 mTextView.removeAdjacentSuggestionSpans(end); 678 679 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 680 !(mTextView.isInExtractedMode())) { 681 if (mSpellChecker == null && createSpellChecker) { 682 mSpellChecker = new SpellChecker(mTextView); 683 } 684 if (mSpellChecker != null) { 685 mSpellChecker.spellCheck(start, end); 686 } 687 } 688 } 689 690 void onScreenStateChanged(int screenState) { 691 switch (screenState) { 692 case View.SCREEN_STATE_ON: 693 resumeBlink(); 694 break; 695 case View.SCREEN_STATE_OFF: 696 suspendBlink(); 697 break; 698 } 699 } 700 701 private void suspendBlink() { 702 if (mBlink != null) { 703 mBlink.cancel(); 704 } 705 } 706 707 private void resumeBlink() { 708 if (mBlink != null) { 709 mBlink.uncancel(); 710 makeBlink(); 711 } 712 } 713 714 void adjustInputType(boolean password, boolean passwordInputType, 715 boolean webPasswordInputType, boolean numberPasswordInputType) { 716 // mInputType has been set from inputType, possibly modified by mInputMethod. 717 // Specialize mInputType to [web]password if we have a text class and the original input 718 // type was a password. 719 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 720 if (password || passwordInputType) { 721 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 722 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 723 } 724 if (webPasswordInputType) { 725 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 726 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 727 } 728 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 729 if (numberPasswordInputType) { 730 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 731 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 732 } 733 } 734 } 735 736 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 737 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 738 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 739 740 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 741 com.android.internal.R.dimen.textview_error_popup_default_width); 742 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 743 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 744 float max = 0; 745 for (int i = 0; i < l.getLineCount(); i++) { 746 max = Math.max(max, l.getLineWidth(i)); 747 } 748 749 /* 750 * Now set the popup size to be big enough for the text plus the border capped 751 * to DEFAULT_MAX_POPUP_WIDTH 752 */ 753 pop.setWidth(wid + (int) Math.ceil(max)); 754 pop.setHeight(ht + l.getHeight()); 755 } 756 757 void setFrame() { 758 if (mErrorPopup != null) { 759 TextView tv = (TextView) mErrorPopup.getContentView(); 760 chooseSize(mErrorPopup, mError, tv); 761 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 762 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 763 } 764 } 765 766 private int getWordStart(int offset) { 767 // FIXME - For this and similar methods we're not doing anything to check if there's 768 // a LocaleSpan in the text, this may be something we should try handling or checking for. 769 int retOffset = getWordIteratorWithText().prevBoundary(offset); 770 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 771 // On punctuation boundary or within group of punctuation, find punctuation start. 772 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 773 } else { 774 // Not on a punctuation boundary, find the word start. 775 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 776 } 777 if (retOffset == BreakIterator.DONE) { 778 return offset; 779 } 780 return retOffset; 781 } 782 783 private int getWordEnd(int offset) { 784 int retOffset = getWordIteratorWithText().nextBoundary(offset); 785 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 786 // On punctuation boundary or within group of punctuation, find punctuation end. 787 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 788 } else { 789 // Not on a punctuation boundary, find the word end. 790 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 791 } 792 if (retOffset == BreakIterator.DONE) { 793 return offset; 794 } 795 return retOffset; 796 } 797 798 private boolean needsToSelectAllToSelectWordOrParagraph() { 799 if (mTextView.hasPasswordTransformationMethod()) { 800 // Always select all on a password field. 801 // Cut/copy menu entries are not available for passwords, but being able to select all 802 // is however useful to delete or paste to replace the entire content. 803 return true; 804 } 805 806 int inputType = mTextView.getInputType(); 807 int klass = inputType & InputType.TYPE_MASK_CLASS; 808 int variation = inputType & InputType.TYPE_MASK_VARIATION; 809 810 // Specific text field types: select the entire text for these 811 if (klass == InputType.TYPE_CLASS_NUMBER || 812 klass == InputType.TYPE_CLASS_PHONE || 813 klass == InputType.TYPE_CLASS_DATETIME || 814 variation == InputType.TYPE_TEXT_VARIATION_URI || 815 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 816 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 817 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 818 return true; 819 } 820 return false; 821 } 822 823 /** 824 * Adjusts selection to the word under last touch offset. Return true if the operation was 825 * successfully performed. 826 */ 827 private boolean selectCurrentWord() { 828 if (!mTextView.canSelectText()) { 829 return false; 830 } 831 832 if (needsToSelectAllToSelectWordOrParagraph()) { 833 return mTextView.selectAllText(); 834 } 835 836 long lastTouchOffsets = getLastTouchOffsets(); 837 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 838 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 839 840 // Safety check in case standard touch event handling has been bypassed 841 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 842 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 843 844 int selectionStart, selectionEnd; 845 846 // If a URLSpan (web address, email, phone...) is found at that position, select it. 847 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 848 getSpans(minOffset, maxOffset, URLSpan.class); 849 if (urlSpans.length >= 1) { 850 URLSpan urlSpan = urlSpans[0]; 851 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 852 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 853 } else { 854 // FIXME - We should check if there's a LocaleSpan in the text, this may be 855 // something we should try handling or checking for. 856 final WordIterator wordIterator = getWordIterator(); 857 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 858 859 selectionStart = wordIterator.getBeginning(minOffset); 860 selectionEnd = wordIterator.getEnd(maxOffset); 861 862 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 863 selectionStart == selectionEnd) { 864 // Possible when the word iterator does not properly handle the text's language 865 long range = getCharClusterRange(minOffset); 866 selectionStart = TextUtils.unpackRangeStartFromLong(range); 867 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 868 } 869 } 870 871 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 872 return selectionEnd > selectionStart; 873 } 874 875 /** 876 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 877 * successfully performed. 878 */ 879 private boolean selectCurrentParagraph() { 880 if (!mTextView.canSelectText()) { 881 return false; 882 } 883 884 if (needsToSelectAllToSelectWordOrParagraph()) { 885 return mTextView.selectAllText(); 886 } 887 888 long lastTouchOffsets = getLastTouchOffsets(); 889 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 890 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 891 892 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 893 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 894 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 895 if (start < end) { 896 Selection.setSelection((Spannable) mTextView.getText(), start, end); 897 return true; 898 } 899 return false; 900 } 901 902 /** 903 * Get the minimum range of paragraphs that contains startOffset and endOffset. 904 */ 905 private long getParagraphsRange(int startOffset, int endOffset) { 906 final Layout layout = mTextView.getLayout(); 907 if (layout == null) { 908 return TextUtils.packRangeInLong(-1, -1); 909 } 910 final CharSequence text = mTextView.getText(); 911 int minLine = layout.getLineForOffset(startOffset); 912 // Search paragraph start. 913 while (minLine > 0) { 914 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 915 if (text.charAt(prevLineEndOffset - 1) == '\n') { 916 break; 917 } 918 minLine--; 919 } 920 int maxLine = layout.getLineForOffset(endOffset); 921 // Search paragraph end. 922 while (maxLine < layout.getLineCount() - 1) { 923 final int lineEndOffset = layout.getLineEnd(maxLine); 924 if (text.charAt(lineEndOffset - 1) == '\n') { 925 break; 926 } 927 maxLine++; 928 } 929 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 930 } 931 932 void onLocaleChanged() { 933 // Will be re-created on demand in getWordIterator with the proper new locale 934 mWordIterator = null; 935 mWordIteratorWithText = null; 936 } 937 938 /** 939 * @hide 940 */ 941 public WordIterator getWordIterator() { 942 if (mWordIterator == null) { 943 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 944 } 945 return mWordIterator; 946 } 947 948 private WordIterator getWordIteratorWithText() { 949 if (mWordIteratorWithText == null) { 950 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 951 mUpdateWordIteratorText = true; 952 } 953 if (mUpdateWordIteratorText) { 954 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 955 // to the user's selection is needed. A possible solution would be to 956 // copy some number N of characters near the selection and then when the 957 // user approaches N then we'd do another copy of the next N characters. 958 CharSequence text = mTextView.getText(); 959 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 960 mUpdateWordIteratorText = false; 961 } 962 return mWordIteratorWithText; 963 } 964 965 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 966 final Layout layout = mTextView.getLayout(); 967 if (layout == null) return offset; 968 return findAfterGivenOffset == layout.isRtlCharAt(offset) ? 969 layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 970 } 971 972 private long getCharClusterRange(int offset) { 973 final int textLength = mTextView.getText().length(); 974 if (offset < textLength) { 975 final int clusterEndOffset = getNextCursorOffset(offset, true); 976 return TextUtils.packRangeInLong( 977 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 978 } 979 if (offset - 1 >= 0) { 980 final int clusterStartOffset = getNextCursorOffset(offset, false); 981 return TextUtils.packRangeInLong(clusterStartOffset, 982 getNextCursorOffset(clusterStartOffset, true)); 983 } 984 return TextUtils.packRangeInLong(offset, offset); 985 } 986 987 private boolean touchPositionIsInSelection() { 988 int selectionStart = mTextView.getSelectionStart(); 989 int selectionEnd = mTextView.getSelectionEnd(); 990 991 if (selectionStart == selectionEnd) { 992 return false; 993 } 994 995 if (selectionStart > selectionEnd) { 996 int tmp = selectionStart; 997 selectionStart = selectionEnd; 998 selectionEnd = tmp; 999 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1000 } 1001 1002 SelectionModifierCursorController selectionController = getSelectionController(); 1003 int minOffset = selectionController.getMinTouchOffset(); 1004 int maxOffset = selectionController.getMaxTouchOffset(); 1005 1006 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1007 } 1008 1009 private PositionListener getPositionListener() { 1010 if (mPositionListener == null) { 1011 mPositionListener = new PositionListener(); 1012 } 1013 return mPositionListener; 1014 } 1015 1016 private interface TextViewPositionListener { 1017 public void updatePosition(int parentPositionX, int parentPositionY, 1018 boolean parentPositionChanged, boolean parentScrolled); 1019 } 1020 1021 private boolean isPositionVisible(final float positionX, final float positionY) { 1022 synchronized (TEMP_POSITION) { 1023 final float[] position = TEMP_POSITION; 1024 position[0] = positionX; 1025 position[1] = positionY; 1026 View view = mTextView; 1027 1028 while (view != null) { 1029 if (view != mTextView) { 1030 // Local scroll is already taken into account in positionX/Y 1031 position[0] -= view.getScrollX(); 1032 position[1] -= view.getScrollY(); 1033 } 1034 1035 if (position[0] < 0 || position[1] < 0 || 1036 position[0] > view.getWidth() || position[1] > view.getHeight()) { 1037 return false; 1038 } 1039 1040 if (!view.getMatrix().isIdentity()) { 1041 view.getMatrix().mapPoints(position); 1042 } 1043 1044 position[0] += view.getLeft(); 1045 position[1] += view.getTop(); 1046 1047 final ViewParent parent = view.getParent(); 1048 if (parent instanceof View) { 1049 view = (View) parent; 1050 } else { 1051 // We've reached the ViewRoot, stop iterating 1052 view = null; 1053 } 1054 } 1055 } 1056 1057 // We've been able to walk up the view hierarchy and the position was never clipped 1058 return true; 1059 } 1060 1061 private boolean isOffsetVisible(int offset) { 1062 Layout layout = mTextView.getLayout(); 1063 if (layout == null) return false; 1064 1065 final int line = layout.getLineForOffset(offset); 1066 final int lineBottom = layout.getLineBottom(line); 1067 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1068 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1069 lineBottom + mTextView.viewportToContentVerticalOffset()); 1070 } 1071 1072 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1073 * in the view. Returns false when the position is in the empty space of left/right of text. 1074 */ 1075 private boolean isPositionOnText(float x, float y) { 1076 Layout layout = mTextView.getLayout(); 1077 if (layout == null) return false; 1078 1079 final int line = mTextView.getLineAtCoordinate(y); 1080 x = mTextView.convertToLocalHorizontalCoordinate(x); 1081 1082 if (x < layout.getLineLeft(line)) return false; 1083 if (x > layout.getLineRight(line)) return false; 1084 return true; 1085 } 1086 1087 private void startDragAndDrop() { 1088 final int start = mTextView.getSelectionStart(); 1089 final int end = mTextView.getSelectionEnd(); 1090 CharSequence selectedText = mTextView.getTransformedText(start, end); 1091 ClipData data = ClipData.newPlainText(null, selectedText); 1092 DragLocalState localState = new DragLocalState(mTextView, start, end); 1093 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1094 View.DRAG_FLAG_GLOBAL); 1095 stopTextActionMode(); 1096 if (hasSelectionController()) { 1097 getSelectionController().resetTouchOffsets(); 1098 } 1099 } 1100 1101 public boolean performLongClick(boolean handled) { 1102 // Long press in empty space moves cursor and starts the insertion action mode. 1103 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 1104 mInsertionControllerEnabled) { 1105 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1106 mLastDownPositionY); 1107 stopTextActionMode(); 1108 Selection.setSelection((Spannable) mTextView.getText(), offset); 1109 getInsertionController().show(); 1110 mIsInsertionActionModeStartPending = true; 1111 handled = true; 1112 } 1113 1114 if (!handled && mTextActionMode != null) { 1115 if (touchPositionIsInSelection()) { 1116 startDragAndDrop(); 1117 } else { 1118 stopTextActionMode(); 1119 selectCurrentWordAndStartDrag(); 1120 } 1121 handled = true; 1122 } 1123 1124 // Start a new selection 1125 if (!handled) { 1126 handled = selectCurrentWordAndStartDrag(); 1127 } 1128 1129 return handled; 1130 } 1131 1132 private long getLastTouchOffsets() { 1133 SelectionModifierCursorController selectionController = getSelectionController(); 1134 final int minOffset = selectionController.getMinTouchOffset(); 1135 final int maxOffset = selectionController.getMaxTouchOffset(); 1136 return TextUtils.packRangeInLong(minOffset, maxOffset); 1137 } 1138 1139 void onFocusChanged(boolean focused, int direction) { 1140 mShowCursor = SystemClock.uptimeMillis(); 1141 ensureEndedBatchEdit(); 1142 1143 if (focused) { 1144 int selStart = mTextView.getSelectionStart(); 1145 int selEnd = mTextView.getSelectionEnd(); 1146 1147 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1148 // mode for these, unless there was a specific selection already started. 1149 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1150 selEnd == mTextView.getText().length(); 1151 1152 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1153 !isFocusHighlighted; 1154 1155 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1156 // If a tap was used to give focus to that view, move cursor at tap position. 1157 // Has to be done before onTakeFocus, which can be overloaded. 1158 final int lastTapPosition = getLastTapPosition(); 1159 if (lastTapPosition >= 0) { 1160 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1161 } 1162 1163 // Note this may have to be moved out of the Editor class 1164 MovementMethod mMovement = mTextView.getMovementMethod(); 1165 if (mMovement != null) { 1166 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1167 } 1168 1169 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1170 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1171 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1172 // This special case ensure that we keep current selection in that case. 1173 // It would be better to know why the DecorView does not have focus at that time. 1174 if (((mTextView.isInExtractedMode()) || mSelectionMoved) && 1175 selStart >= 0 && selEnd >= 0) { 1176 /* 1177 * Someone intentionally set the selection, so let them 1178 * do whatever it is that they wanted to do instead of 1179 * the default on-focus behavior. We reset the selection 1180 * here instead of just skipping the onTakeFocus() call 1181 * because some movement methods do something other than 1182 * just setting the selection in theirs and we still 1183 * need to go through that path. 1184 */ 1185 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1186 } 1187 1188 if (mSelectAllOnFocus) { 1189 mTextView.selectAllText(); 1190 } 1191 1192 mTouchFocusSelected = true; 1193 } 1194 1195 mFrozenWithFocus = false; 1196 mSelectionMoved = false; 1197 1198 if (mError != null) { 1199 showError(); 1200 } 1201 1202 makeBlink(); 1203 } else { 1204 if (mError != null) { 1205 hideError(); 1206 } 1207 // Don't leave us in the middle of a batch edit. 1208 mTextView.onEndBatchEdit(); 1209 1210 if (mTextView.isInExtractedMode()) { 1211 // terminateTextSelectionMode removes selection, which we want to keep when 1212 // ExtractEditText goes out of focus. 1213 final int selStart = mTextView.getSelectionStart(); 1214 final int selEnd = mTextView.getSelectionEnd(); 1215 hideCursorAndSpanControllers(); 1216 stopTextActionMode(); 1217 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1218 } else { 1219 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1220 hideCursorAndSpanControllers(); 1221 stopTextActionMode(); 1222 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1223 downgradeEasyCorrectionSpans(); 1224 } 1225 // No need to create the controller 1226 if (mSelectionModifierCursorController != null) { 1227 mSelectionModifierCursorController.resetTouchOffsets(); 1228 } 1229 } 1230 } 1231 1232 /** 1233 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1234 * span. 1235 */ 1236 private void downgradeEasyCorrectionSpans() { 1237 CharSequence text = mTextView.getText(); 1238 if (text instanceof Spannable) { 1239 Spannable spannable = (Spannable) text; 1240 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1241 spannable.length(), SuggestionSpan.class); 1242 for (int i = 0; i < suggestionSpans.length; i++) { 1243 int flags = suggestionSpans[i].getFlags(); 1244 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1245 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1246 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1247 suggestionSpans[i].setFlags(flags); 1248 } 1249 } 1250 } 1251 } 1252 1253 void sendOnTextChanged(int start, int after) { 1254 updateSpellCheckSpans(start, start + after, false); 1255 1256 // Flip flag to indicate the word iterator needs to have the text reset. 1257 mUpdateWordIteratorText = true; 1258 1259 // Hide the controllers as soon as text is modified (typing, procedural...) 1260 // We do not hide the span controllers, since they can be added when a new text is 1261 // inserted into the text view (voice IME). 1262 hideCursorControllers(); 1263 // Reset drag accelerator. 1264 if (mSelectionModifierCursorController != null) { 1265 mSelectionModifierCursorController.resetTouchOffsets(); 1266 } 1267 stopTextActionMode(); 1268 } 1269 1270 private int getLastTapPosition() { 1271 // No need to create the controller at that point, no last tap position saved 1272 if (mSelectionModifierCursorController != null) { 1273 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1274 if (lastTapPosition >= 0) { 1275 // Safety check, should not be possible. 1276 if (lastTapPosition > mTextView.getText().length()) { 1277 lastTapPosition = mTextView.getText().length(); 1278 } 1279 return lastTapPosition; 1280 } 1281 } 1282 1283 return -1; 1284 } 1285 1286 void onWindowFocusChanged(boolean hasWindowFocus) { 1287 if (hasWindowFocus) { 1288 if (mBlink != null) { 1289 mBlink.uncancel(); 1290 makeBlink(); 1291 } 1292 final InputMethodManager imm = InputMethodManager.peekInstance(); 1293 final boolean immFullScreen = (imm != null && imm.isFullscreenMode()); 1294 if (mSelectionModifierCursorController != null && mTextView.hasSelection() 1295 && !immFullScreen && mTextActionMode != null) { 1296 mSelectionModifierCursorController.show(); 1297 } 1298 } else { 1299 if (mBlink != null) { 1300 mBlink.cancel(); 1301 } 1302 if (mInputContentType != null) { 1303 mInputContentType.enterDown = false; 1304 } 1305 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1306 hideCursorAndSpanControllers(); 1307 if (mSelectionModifierCursorController != null) { 1308 mSelectionModifierCursorController.hide(); 1309 } 1310 if (mSuggestionsPopupWindow != null) { 1311 mSuggestionsPopupWindow.onParentLostFocus(); 1312 } 1313 1314 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1315 ensureEndedBatchEdit(); 1316 } 1317 } 1318 1319 private void updateTapState(MotionEvent event) { 1320 final int action = event.getActionMasked(); 1321 if (action == MotionEvent.ACTION_DOWN) { 1322 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1323 // Detect double tap and triple click. 1324 if (((mTapState == TAP_STATE_FIRST_TAP) 1325 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1326 && (SystemClock.uptimeMillis() - mLastTouchUpTime) <= 1327 ViewConfiguration.getDoubleTapTimeout()) { 1328 if (mTapState == TAP_STATE_FIRST_TAP) { 1329 mTapState = TAP_STATE_DOUBLE_TAP; 1330 } else { 1331 mTapState = TAP_STATE_TRIPLE_CLICK; 1332 } 1333 } else { 1334 mTapState = TAP_STATE_FIRST_TAP; 1335 } 1336 } 1337 if (action == MotionEvent.ACTION_UP) { 1338 mLastTouchUpTime = SystemClock.uptimeMillis(); 1339 } 1340 } 1341 1342 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1343 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1344 return false; 1345 } 1346 final boolean primaryButtonStateChanged = 1347 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1348 final int action = event.getActionMasked(); 1349 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1350 && !primaryButtonStateChanged) { 1351 return true; 1352 } 1353 if (action == MotionEvent.ACTION_MOVE 1354 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1355 return true; 1356 } 1357 return false; 1358 } 1359 1360 void onTouchEvent(MotionEvent event) { 1361 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1362 mLastButtonState = event.getButtonState(); 1363 if (filterOutEvent) { 1364 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1365 mDiscardNextActionUp = true; 1366 } 1367 return; 1368 } 1369 updateTapState(event); 1370 updateFloatingToolbarVisibility(event); 1371 1372 if (hasSelectionController()) { 1373 getSelectionController().onTouchEvent(event); 1374 } 1375 1376 if (mShowSuggestionRunnable != null) { 1377 mTextView.removeCallbacks(mShowSuggestionRunnable); 1378 mShowSuggestionRunnable = null; 1379 } 1380 1381 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1382 mLastDownPositionX = event.getX(); 1383 mLastDownPositionY = event.getY(); 1384 1385 // Reset this state; it will be re-set if super.onTouchEvent 1386 // causes focus to move to the view. 1387 mTouchFocusSelected = false; 1388 mIgnoreActionUpEvent = false; 1389 } 1390 } 1391 1392 private void updateFloatingToolbarVisibility(MotionEvent event) { 1393 if (mTextActionMode != null) { 1394 switch (event.getActionMasked()) { 1395 case MotionEvent.ACTION_MOVE: 1396 hideFloatingToolbar(); 1397 break; 1398 case MotionEvent.ACTION_UP: // fall through 1399 case MotionEvent.ACTION_CANCEL: 1400 showFloatingToolbar(); 1401 } 1402 } 1403 } 1404 1405 private void hideFloatingToolbar() { 1406 if (mTextActionMode != null) { 1407 mTextView.removeCallbacks(mShowFloatingToolbar); 1408 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1409 } 1410 } 1411 1412 private void showFloatingToolbar() { 1413 if (mTextActionMode != null) { 1414 // Delay "show" so it doesn't interfere with click confirmations 1415 // or double-clicks that could "dismiss" the floating toolbar. 1416 int delay = ViewConfiguration.getDoubleTapTimeout(); 1417 mTextView.postDelayed(mShowFloatingToolbar, delay); 1418 } 1419 } 1420 1421 public void beginBatchEdit() { 1422 mInBatchEditControllers = true; 1423 final InputMethodState ims = mInputMethodState; 1424 if (ims != null) { 1425 int nesting = ++ims.mBatchEditNesting; 1426 if (nesting == 1) { 1427 ims.mCursorChanged = false; 1428 ims.mChangedDelta = 0; 1429 if (ims.mContentChanged) { 1430 // We already have a pending change from somewhere else, 1431 // so turn this into a full update. 1432 ims.mChangedStart = 0; 1433 ims.mChangedEnd = mTextView.getText().length(); 1434 } else { 1435 ims.mChangedStart = EXTRACT_UNKNOWN; 1436 ims.mChangedEnd = EXTRACT_UNKNOWN; 1437 ims.mContentChanged = false; 1438 } 1439 mUndoInputFilter.beginBatchEdit(); 1440 mTextView.onBeginBatchEdit(); 1441 } 1442 } 1443 } 1444 1445 public void endBatchEdit() { 1446 mInBatchEditControllers = false; 1447 final InputMethodState ims = mInputMethodState; 1448 if (ims != null) { 1449 int nesting = --ims.mBatchEditNesting; 1450 if (nesting == 0) { 1451 finishBatchEdit(ims); 1452 } 1453 } 1454 } 1455 1456 void ensureEndedBatchEdit() { 1457 final InputMethodState ims = mInputMethodState; 1458 if (ims != null && ims.mBatchEditNesting != 0) { 1459 ims.mBatchEditNesting = 0; 1460 finishBatchEdit(ims); 1461 } 1462 } 1463 1464 void finishBatchEdit(final InputMethodState ims) { 1465 mTextView.onEndBatchEdit(); 1466 mUndoInputFilter.endBatchEdit(); 1467 1468 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1469 mTextView.updateAfterEdit(); 1470 reportExtractedText(); 1471 } else if (ims.mCursorChanged) { 1472 // Cheesy way to get us to report the current cursor location. 1473 mTextView.invalidateCursor(); 1474 } 1475 // sendUpdateSelection knows to avoid sending if the selection did 1476 // not actually change. 1477 sendUpdateSelection(); 1478 } 1479 1480 static final int EXTRACT_NOTHING = -2; 1481 static final int EXTRACT_UNKNOWN = -1; 1482 1483 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1484 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1485 EXTRACT_UNKNOWN, outText); 1486 } 1487 1488 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1489 int partialStartOffset, int partialEndOffset, int delta, 1490 @Nullable ExtractedText outText) { 1491 if (request == null || outText == null) { 1492 return false; 1493 } 1494 1495 final CharSequence content = mTextView.getText(); 1496 if (content == null) { 1497 return false; 1498 } 1499 1500 if (partialStartOffset != EXTRACT_NOTHING) { 1501 final int N = content.length(); 1502 if (partialStartOffset < 0) { 1503 outText.partialStartOffset = outText.partialEndOffset = -1; 1504 partialStartOffset = 0; 1505 partialEndOffset = N; 1506 } else { 1507 // Now use the delta to determine the actual amount of text 1508 // we need. 1509 partialEndOffset += delta; 1510 // Adjust offsets to ensure we contain full spans. 1511 if (content instanceof Spanned) { 1512 Spanned spanned = (Spanned)content; 1513 Object[] spans = spanned.getSpans(partialStartOffset, 1514 partialEndOffset, ParcelableSpan.class); 1515 int i = spans.length; 1516 while (i > 0) { 1517 i--; 1518 int j = spanned.getSpanStart(spans[i]); 1519 if (j < partialStartOffset) partialStartOffset = j; 1520 j = spanned.getSpanEnd(spans[i]); 1521 if (j > partialEndOffset) partialEndOffset = j; 1522 } 1523 } 1524 outText.partialStartOffset = partialStartOffset; 1525 outText.partialEndOffset = partialEndOffset - delta; 1526 1527 if (partialStartOffset > N) { 1528 partialStartOffset = N; 1529 } else if (partialStartOffset < 0) { 1530 partialStartOffset = 0; 1531 } 1532 if (partialEndOffset > N) { 1533 partialEndOffset = N; 1534 } else if (partialEndOffset < 0) { 1535 partialEndOffset = 0; 1536 } 1537 } 1538 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1539 outText.text = content.subSequence(partialStartOffset, 1540 partialEndOffset); 1541 } else { 1542 outText.text = TextUtils.substring(content, partialStartOffset, 1543 partialEndOffset); 1544 } 1545 } else { 1546 outText.partialStartOffset = 0; 1547 outText.partialEndOffset = 0; 1548 outText.text = ""; 1549 } 1550 outText.flags = 0; 1551 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1552 outText.flags |= ExtractedText.FLAG_SELECTING; 1553 } 1554 if (mTextView.isSingleLine()) { 1555 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1556 } 1557 outText.startOffset = 0; 1558 outText.selectionStart = mTextView.getSelectionStart(); 1559 outText.selectionEnd = mTextView.getSelectionEnd(); 1560 return true; 1561 } 1562 1563 boolean reportExtractedText() { 1564 final Editor.InputMethodState ims = mInputMethodState; 1565 if (ims != null) { 1566 final boolean contentChanged = ims.mContentChanged; 1567 if (contentChanged || ims.mSelectionModeChanged) { 1568 ims.mContentChanged = false; 1569 ims.mSelectionModeChanged = false; 1570 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1571 if (req != null) { 1572 InputMethodManager imm = InputMethodManager.peekInstance(); 1573 if (imm != null) { 1574 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1575 "Retrieving extracted start=" + ims.mChangedStart + 1576 " end=" + ims.mChangedEnd + 1577 " delta=" + ims.mChangedDelta); 1578 if (ims.mChangedStart < 0 && !contentChanged) { 1579 ims.mChangedStart = EXTRACT_NOTHING; 1580 } 1581 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1582 ims.mChangedDelta, ims.mExtractedText)) { 1583 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1584 "Reporting extracted start=" + 1585 ims.mExtractedText.partialStartOffset + 1586 " end=" + ims.mExtractedText.partialEndOffset + 1587 ": " + ims.mExtractedText.text); 1588 1589 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1590 ims.mChangedStart = EXTRACT_UNKNOWN; 1591 ims.mChangedEnd = EXTRACT_UNKNOWN; 1592 ims.mChangedDelta = 0; 1593 ims.mContentChanged = false; 1594 return true; 1595 } 1596 } 1597 } 1598 } 1599 } 1600 return false; 1601 } 1602 1603 private void sendUpdateSelection() { 1604 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1605 final InputMethodManager imm = InputMethodManager.peekInstance(); 1606 if (null != imm) { 1607 final int selectionStart = mTextView.getSelectionStart(); 1608 final int selectionEnd = mTextView.getSelectionEnd(); 1609 int candStart = -1; 1610 int candEnd = -1; 1611 if (mTextView.getText() instanceof Spannable) { 1612 final Spannable sp = (Spannable) mTextView.getText(); 1613 candStart = EditableInputConnection.getComposingSpanStart(sp); 1614 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1615 } 1616 // InputMethodManager#updateSelection skips sending the message if 1617 // none of the parameters have changed since the last time we called it. 1618 imm.updateSelection(mTextView, 1619 selectionStart, selectionEnd, candStart, candEnd); 1620 } 1621 } 1622 } 1623 1624 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1625 int cursorOffsetVertical) { 1626 final int selectionStart = mTextView.getSelectionStart(); 1627 final int selectionEnd = mTextView.getSelectionEnd(); 1628 1629 final InputMethodState ims = mInputMethodState; 1630 if (ims != null && ims.mBatchEditNesting == 0) { 1631 InputMethodManager imm = InputMethodManager.peekInstance(); 1632 if (imm != null) { 1633 if (imm.isActive(mTextView)) { 1634 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1635 // We are in extract mode and the content has changed 1636 // in some way... just report complete new text to the 1637 // input method. 1638 reportExtractedText(); 1639 } 1640 } 1641 } 1642 } 1643 1644 if (mCorrectionHighlighter != null) { 1645 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1646 } 1647 1648 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1649 drawCursor(canvas, cursorOffsetVertical); 1650 // Rely on the drawable entirely, do not draw the cursor line. 1651 // Has to be done after the IMM related code above which relies on the highlight. 1652 highlight = null; 1653 } 1654 1655 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1656 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1657 cursorOffsetVertical); 1658 } else { 1659 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1660 } 1661 } 1662 1663 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1664 Paint highlightPaint, int cursorOffsetVertical) { 1665 final long lineRange = layout.getLineRangeForDraw(canvas); 1666 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1667 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1668 if (lastLine < 0) return; 1669 1670 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1671 firstLine, lastLine); 1672 1673 if (layout instanceof DynamicLayout) { 1674 if (mTextRenderNodes == null) { 1675 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1676 } 1677 1678 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1679 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1680 int[] blockIndices = dynamicLayout.getBlockIndices(); 1681 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1682 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1683 1684 int endOfPreviousBlock = -1; 1685 int searchStartIndex = 0; 1686 for (int i = 0; i < numberOfBlocks; i++) { 1687 int blockEndLine = blockEndLines[i]; 1688 int blockIndex = blockIndices[i]; 1689 1690 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1691 if (blockIsInvalid) { 1692 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1693 searchStartIndex); 1694 // Note how dynamic layout's internal block indices get updated from Editor 1695 blockIndices[i] = blockIndex; 1696 if (mTextRenderNodes[blockIndex] != null) { 1697 mTextRenderNodes[blockIndex].isDirty = true; 1698 } 1699 searchStartIndex = blockIndex + 1; 1700 } 1701 1702 if (mTextRenderNodes[blockIndex] == null) { 1703 mTextRenderNodes[blockIndex] = 1704 new TextRenderNode("Text " + blockIndex); 1705 } 1706 1707 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1708 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1709 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1710 final int blockBeginLine = endOfPreviousBlock + 1; 1711 final int top = layout.getLineTop(blockBeginLine); 1712 final int bottom = layout.getLineBottom(blockEndLine); 1713 int left = 0; 1714 int right = mTextView.getWidth(); 1715 if (mTextView.getHorizontallyScrolling()) { 1716 float min = Float.MAX_VALUE; 1717 float max = Float.MIN_VALUE; 1718 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1719 min = Math.min(min, layout.getLineLeft(line)); 1720 max = Math.max(max, layout.getLineRight(line)); 1721 } 1722 left = (int) min; 1723 right = (int) (max + 0.5f); 1724 } 1725 1726 // Rebuild display list if it is invalid 1727 if (blockDisplayListIsInvalid) { 1728 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1729 right - left, bottom - top); 1730 try { 1731 // drawText is always relative to TextView's origin, this translation 1732 // brings this range of text back to the top left corner of the viewport 1733 displayListCanvas.translate(-left, -top); 1734 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1735 mTextRenderNodes[blockIndex].isDirty = false; 1736 // No need to untranslate, previous context is popped after 1737 // drawDisplayList 1738 } finally { 1739 blockDisplayList.end(displayListCanvas); 1740 // Same as drawDisplayList below, handled by our TextView's parent 1741 blockDisplayList.setClipToBounds(false); 1742 } 1743 } 1744 1745 // Valid disply list whose index is >= indexFirstChangedBlock 1746 // only needs to update its drawing location. 1747 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1748 } 1749 1750 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1751 1752 endOfPreviousBlock = blockEndLine; 1753 } 1754 1755 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1756 } else { 1757 // Boring layout is used for empty and hint text 1758 layout.drawText(canvas, firstLine, lastLine); 1759 } 1760 } 1761 1762 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1763 int searchStartIndex) { 1764 int length = mTextRenderNodes.length; 1765 for (int i = searchStartIndex; i < length; i++) { 1766 boolean blockIndexFound = false; 1767 for (int j = 0; j < numberOfBlocks; j++) { 1768 if (blockIndices[j] == i) { 1769 blockIndexFound = true; 1770 break; 1771 } 1772 } 1773 if (blockIndexFound) continue; 1774 return i; 1775 } 1776 1777 // No available index found, the pool has to grow 1778 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1779 return length; 1780 } 1781 1782 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1783 final boolean translate = cursorOffsetVertical != 0; 1784 if (translate) canvas.translate(0, cursorOffsetVertical); 1785 for (int i = 0; i < mCursorCount; i++) { 1786 mCursorDrawable[i].draw(canvas); 1787 } 1788 if (translate) canvas.translate(0, -cursorOffsetVertical); 1789 } 1790 1791 /** 1792 * Invalidates all the sub-display lists that overlap the specified character range 1793 */ 1794 void invalidateTextDisplayList(Layout layout, int start, int end) { 1795 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1796 final int firstLine = layout.getLineForOffset(start); 1797 final int lastLine = layout.getLineForOffset(end); 1798 1799 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1800 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1801 int[] blockIndices = dynamicLayout.getBlockIndices(); 1802 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1803 1804 int i = 0; 1805 // Skip the blocks before firstLine 1806 while (i < numberOfBlocks) { 1807 if (blockEndLines[i] >= firstLine) break; 1808 i++; 1809 } 1810 1811 // Invalidate all subsequent blocks until lastLine is passed 1812 while (i < numberOfBlocks) { 1813 final int blockIndex = blockIndices[i]; 1814 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1815 mTextRenderNodes[blockIndex].isDirty = true; 1816 } 1817 if (blockEndLines[i] >= lastLine) break; 1818 i++; 1819 } 1820 } 1821 } 1822 1823 void invalidateTextDisplayList() { 1824 if (mTextRenderNodes != null) { 1825 for (int i = 0; i < mTextRenderNodes.length; i++) { 1826 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1827 } 1828 } 1829 } 1830 1831 void updateCursorsPositions() { 1832 if (mTextView.mCursorDrawableRes == 0) { 1833 mCursorCount = 0; 1834 return; 1835 } 1836 1837 Layout layout = getActiveLayout(); 1838 final int offset = mTextView.getSelectionStart(); 1839 final int line = layout.getLineForOffset(offset); 1840 final int top = layout.getLineTop(line); 1841 final int bottom = layout.getLineTop(line + 1); 1842 1843 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1844 1845 int middle = bottom; 1846 if (mCursorCount == 2) { 1847 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1848 middle = (top + bottom) >> 1; 1849 } 1850 1851 boolean clamped = layout.shouldClampCursor(line); 1852 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped)); 1853 1854 if (mCursorCount == 2) { 1855 updateCursorPosition(1, middle, bottom, layout.getSecondaryHorizontal(offset, clamped)); 1856 } 1857 } 1858 1859 /** 1860 * Start an Insertion action mode. 1861 */ 1862 void startInsertionActionMode() { 1863 if (mInsertionActionModeRunnable != null) { 1864 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1865 } 1866 if (extractedTextModeWillBeStarted()) { 1867 return; 1868 } 1869 stopTextActionMode(); 1870 1871 ActionMode.Callback actionModeCallback = 1872 new TextActionModeCallback(false /* hasSelection */); 1873 mTextActionMode = mTextView.startActionMode( 1874 actionModeCallback, ActionMode.TYPE_FLOATING); 1875 if (mTextActionMode != null && getInsertionController() != null) { 1876 getInsertionController().show(); 1877 } 1878 } 1879 1880 /** 1881 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1882 * are shown if there is a selection, otherwise the insertion handle is shown. This should be 1883 * used when the mode is started from a non-touch event. 1884 * 1885 * @return true if the selection mode was actually started. 1886 */ 1887 boolean startSelectionActionMode() { 1888 boolean selectionStarted = startSelectionActionModeInternal(); 1889 if (selectionStarted) { 1890 getSelectionController().show(); 1891 } else if (getInsertionController() != null) { 1892 getInsertionController().show(); 1893 } 1894 return selectionStarted; 1895 } 1896 1897 /** 1898 * If the TextView allows text selection, selects the current word when no existing selection 1899 * was available and starts a drag. 1900 * 1901 * @return true if the drag was started. 1902 */ 1903 private boolean selectCurrentWordAndStartDrag() { 1904 if (mInsertionActionModeRunnable != null) { 1905 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1906 } 1907 if (extractedTextModeWillBeStarted()) { 1908 return false; 1909 } 1910 if (mTextActionMode != null) { 1911 mTextActionMode.finish(); 1912 } 1913 if (!checkFieldAndSelectCurrentWord()) { 1914 return false; 1915 } 1916 1917 // Avoid dismissing the selection if it exists. 1918 mPreserveDetachedSelection = true; 1919 stopTextActionMode(); 1920 mPreserveDetachedSelection = false; 1921 1922 getSelectionController().enterDrag( 1923 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 1924 return true; 1925 } 1926 1927 /** 1928 * Checks whether a selection can be performed on the current TextView and if so selects 1929 * the current word. 1930 * 1931 * @return true if there already was a selection or if the current word was selected. 1932 */ 1933 boolean checkFieldAndSelectCurrentWord() { 1934 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1935 Log.w(TextView.LOG_TAG, 1936 "TextView does not support text selection. Selection cancelled."); 1937 return false; 1938 } 1939 1940 if (!mTextView.hasSelection()) { 1941 // There may already be a selection on device rotation 1942 return selectCurrentWord(); 1943 } 1944 return true; 1945 } 1946 1947 private boolean startSelectionActionModeInternal() { 1948 if (mTextActionMode != null) { 1949 // Text action mode is already started 1950 mTextActionMode.invalidate(); 1951 return false; 1952 } 1953 1954 if (!checkFieldAndSelectCurrentWord()) { 1955 return false; 1956 } 1957 1958 boolean willExtract = extractedTextModeWillBeStarted(); 1959 1960 // Do not start the action mode when extracted text will show up full screen, which would 1961 // immediately hide the newly created action bar and would be visually distracting. 1962 if (!willExtract) { 1963 ActionMode.Callback actionModeCallback = 1964 new TextActionModeCallback(true /* hasSelection */); 1965 mTextActionMode = mTextView.startActionMode( 1966 actionModeCallback, ActionMode.TYPE_FLOATING); 1967 } 1968 1969 final boolean selectionStarted = mTextActionMode != null || willExtract; 1970 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1971 // Show the IME to be able to replace text, except when selecting non editable text. 1972 final InputMethodManager imm = InputMethodManager.peekInstance(); 1973 if (imm != null) { 1974 imm.showSoftInput(mTextView, 0, null); 1975 } 1976 } 1977 return selectionStarted; 1978 } 1979 1980 boolean extractedTextModeWillBeStarted() { 1981 if (!(mTextView.isInExtractedMode())) { 1982 final InputMethodManager imm = InputMethodManager.peekInstance(); 1983 return imm != null && imm.isFullscreenMode(); 1984 } 1985 return false; 1986 } 1987 1988 /** 1989 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1990 * the current cursor position or selection range. This method is consistent with the 1991 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1992 */ 1993 private boolean shouldOfferToShowSuggestions() { 1994 CharSequence text = mTextView.getText(); 1995 if (!(text instanceof Spannable)) return false; 1996 1997 final Spannable spannable = (Spannable) text; 1998 final int selectionStart = mTextView.getSelectionStart(); 1999 final int selectionEnd = mTextView.getSelectionEnd(); 2000 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2001 SuggestionSpan.class); 2002 if (suggestionSpans.length == 0) { 2003 return false; 2004 } 2005 if (selectionStart == selectionEnd) { 2006 // Spans overlap the cursor. 2007 for (int i = 0; i < suggestionSpans.length; i++) { 2008 if (suggestionSpans[i].getSuggestions().length > 0) { 2009 return true; 2010 } 2011 } 2012 return false; 2013 } 2014 int minSpanStart = mTextView.getText().length(); 2015 int maxSpanEnd = 0; 2016 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2017 int unionOfSpansCoveringSelectionStartEnd = 0; 2018 boolean hasValidSuggestions = false; 2019 for (int i = 0; i < suggestionSpans.length; i++) { 2020 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2021 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2022 minSpanStart = Math.min(minSpanStart, spanStart); 2023 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2024 if (selectionStart < spanStart || selectionStart > spanEnd) { 2025 // The span doesn't cover the current selection start point. 2026 continue; 2027 } 2028 hasValidSuggestions = 2029 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2030 unionOfSpansCoveringSelectionStartStart = 2031 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2032 unionOfSpansCoveringSelectionStartEnd = 2033 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2034 } 2035 if (!hasValidSuggestions) { 2036 return false; 2037 } 2038 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2039 // No spans cover the selection start point. 2040 return false; 2041 } 2042 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2043 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2044 // There is a span that is not covered by the union. In this case, we soouldn't offer 2045 // to show suggestions as it's confusing. 2046 return false; 2047 } 2048 return true; 2049 } 2050 2051 /** 2052 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2053 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2054 */ 2055 private boolean isCursorInsideEasyCorrectionSpan() { 2056 Spannable spannable = (Spannable) mTextView.getText(); 2057 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2058 mTextView.getSelectionEnd(), SuggestionSpan.class); 2059 for (int i = 0; i < suggestionSpans.length; i++) { 2060 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2061 return true; 2062 } 2063 } 2064 return false; 2065 } 2066 2067 void onTouchUpEvent(MotionEvent event) { 2068 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2069 hideCursorAndSpanControllers(); 2070 stopTextActionMode(); 2071 CharSequence text = mTextView.getText(); 2072 if (!selectAllGotFocus && text.length() > 0) { 2073 // Move cursor 2074 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2075 Selection.setSelection((Spannable) text, offset); 2076 if (mSpellChecker != null) { 2077 // When the cursor moves, the word that was typed may need spell check 2078 mSpellChecker.onSelectionChanged(); 2079 } 2080 2081 if (!extractedTextModeWillBeStarted()) { 2082 if (isCursorInsideEasyCorrectionSpan()) { 2083 // Cancel the single tap delayed runnable. 2084 if (mInsertionActionModeRunnable != null) { 2085 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2086 } 2087 2088 mShowSuggestionRunnable = new Runnable() { 2089 public void run() { 2090 showSuggestions(); 2091 } 2092 }; 2093 // removeCallbacks is performed on every touch 2094 mTextView.postDelayed(mShowSuggestionRunnable, 2095 ViewConfiguration.getDoubleTapTimeout()); 2096 } else if (hasInsertionController()) { 2097 getInsertionController().show(); 2098 } 2099 } 2100 } 2101 } 2102 2103 protected void stopTextActionMode() { 2104 if (mTextActionMode != null) { 2105 // This will hide the mSelectionModifierCursorController 2106 mTextActionMode.finish(); 2107 } 2108 } 2109 2110 /** 2111 * @return True if this view supports insertion handles. 2112 */ 2113 boolean hasInsertionController() { 2114 return mInsertionControllerEnabled; 2115 } 2116 2117 /** 2118 * @return True if this view supports selection handles. 2119 */ 2120 boolean hasSelectionController() { 2121 return mSelectionControllerEnabled; 2122 } 2123 2124 InsertionPointCursorController getInsertionController() { 2125 if (!mInsertionControllerEnabled) { 2126 return null; 2127 } 2128 2129 if (mInsertionPointCursorController == null) { 2130 mInsertionPointCursorController = new InsertionPointCursorController(); 2131 2132 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2133 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2134 } 2135 2136 return mInsertionPointCursorController; 2137 } 2138 2139 SelectionModifierCursorController getSelectionController() { 2140 if (!mSelectionControllerEnabled) { 2141 return null; 2142 } 2143 2144 if (mSelectionModifierCursorController == null) { 2145 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2146 2147 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2148 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2149 } 2150 2151 return mSelectionModifierCursorController; 2152 } 2153 2154 /** 2155 * @hide 2156 */ 2157 @VisibleForTesting 2158 public Drawable[] getCursorDrawable() { 2159 return mCursorDrawable; 2160 } 2161 2162 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2163 if (mCursorDrawable[cursorIndex] == null) 2164 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2165 mTextView.mCursorDrawableRes); 2166 final Drawable drawable = mCursorDrawable[cursorIndex]; 2167 final int left = clampCursorHorizontalPosition(drawable, horizontal); 2168 final int width = drawable.getIntrinsicWidth(); 2169 drawable.setBounds(left, top - mTempRect.top, left + width, 2170 bottom + mTempRect.bottom); 2171 } 2172 2173 /** 2174 * Return clamped position for the cursor. If the cursor is within the boundaries of the view, 2175 * then it is offset with the left padding of the cursor drawable. If the cursor is at 2176 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2177 * the view boundary. 2178 * 2179 * @param drawable Cursor drawable. 2180 * @param horizontal Horizontal position for the cursor. 2181 * @return The clamped horizontal position for the cursor. 2182 */ 2183 private final int clampCursorHorizontalPosition(final Drawable drawable, float 2184 horizontal) { 2185 horizontal = Math.max(0.5f, horizontal - 0.5f); 2186 if (mTempRect == null) mTempRect = new Rect(); 2187 drawable.getPadding(mTempRect); 2188 int scrollX = mTextView.getScrollX(); 2189 float horizontalDiff = horizontal - scrollX; 2190 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2191 - mTextView.getCompoundPaddingRight(); 2192 2193 final int left; 2194 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2195 // at the rightmost position 2196 final int cursorWidth = drawable.getIntrinsicWidth(); 2197 left = viewClippedWidth + scrollX - (cursorWidth - mTempRect.right); 2198 } else if (Math.abs(horizontalDiff) <= 1f) { 2199 // at the leftmost position 2200 left = scrollX - mTempRect.left; 2201 } else { 2202 left = (int) horizontal - mTempRect.left; 2203 } 2204 return left; 2205 } 2206 2207 /** 2208 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2209 * a dictionary) from the current input method, provided by it calling 2210 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2211 * implementation flashes the background of the corrected word to provide feedback to the user. 2212 * 2213 * @param info The auto correct info about the text that was corrected. 2214 */ 2215 public void onCommitCorrection(CorrectionInfo info) { 2216 if (mCorrectionHighlighter == null) { 2217 mCorrectionHighlighter = new CorrectionHighlighter(); 2218 } else { 2219 mCorrectionHighlighter.invalidate(false); 2220 } 2221 2222 mCorrectionHighlighter.highlight(info); 2223 } 2224 2225 void showSuggestions() { 2226 if (mSuggestionsPopupWindow == null) { 2227 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 2228 } 2229 hideCursorAndSpanControllers(); 2230 stopTextActionMode(); 2231 mSuggestionsPopupWindow.show(); 2232 } 2233 2234 void onScrollChanged() { 2235 if (mPositionListener != null) { 2236 mPositionListener.onScrollChanged(); 2237 } 2238 if (mTextActionMode != null) { 2239 mTextActionMode.invalidateContentRect(); 2240 } 2241 } 2242 2243 /** 2244 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2245 */ 2246 private boolean shouldBlink() { 2247 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2248 2249 final int start = mTextView.getSelectionStart(); 2250 if (start < 0) return false; 2251 2252 final int end = mTextView.getSelectionEnd(); 2253 if (end < 0) return false; 2254 2255 return start == end; 2256 } 2257 2258 void makeBlink() { 2259 if (shouldBlink()) { 2260 mShowCursor = SystemClock.uptimeMillis(); 2261 if (mBlink == null) mBlink = new Blink(); 2262 mTextView.removeCallbacks(mBlink); 2263 mTextView.postDelayed(mBlink, BLINK); 2264 } else { 2265 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2266 } 2267 } 2268 2269 private class Blink implements Runnable { 2270 private boolean mCancelled; 2271 2272 public void run() { 2273 if (mCancelled) { 2274 return; 2275 } 2276 2277 mTextView.removeCallbacks(this); 2278 2279 if (shouldBlink()) { 2280 if (mTextView.getLayout() != null) { 2281 mTextView.invalidateCursorPath(); 2282 } 2283 2284 mTextView.postDelayed(this, BLINK); 2285 } 2286 } 2287 2288 void cancel() { 2289 if (!mCancelled) { 2290 mTextView.removeCallbacks(this); 2291 mCancelled = true; 2292 } 2293 } 2294 2295 void uncancel() { 2296 mCancelled = false; 2297 } 2298 } 2299 2300 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2301 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2302 com.android.internal.R.layout.text_drag_thumbnail, null); 2303 2304 if (shadowView == null) { 2305 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2306 } 2307 2308 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2309 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2310 end = TextUtils.unpackRangeEndFromLong(range); 2311 } 2312 final CharSequence text = mTextView.getTransformedText(start, end); 2313 shadowView.setText(text); 2314 shadowView.setTextColor(mTextView.getTextColors()); 2315 2316 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2317 shadowView.setGravity(Gravity.CENTER); 2318 2319 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2320 ViewGroup.LayoutParams.WRAP_CONTENT)); 2321 2322 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2323 shadowView.measure(size, size); 2324 2325 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2326 shadowView.invalidate(); 2327 return new DragShadowBuilder(shadowView); 2328 } 2329 2330 private static class DragLocalState { 2331 public TextView sourceTextView; 2332 public int start, end; 2333 2334 public DragLocalState(TextView sourceTextView, int start, int end) { 2335 this.sourceTextView = sourceTextView; 2336 this.start = start; 2337 this.end = end; 2338 } 2339 } 2340 2341 void onDrop(DragEvent event) { 2342 StringBuilder content = new StringBuilder(""); 2343 2344 final DropPermissions dropPermissions = DropPermissions.obtain(event); 2345 if (dropPermissions != null) { 2346 dropPermissions.takeTransient(); 2347 } 2348 2349 try { 2350 ClipData clipData = event.getClipData(); 2351 final int itemCount = clipData.getItemCount(); 2352 for (int i=0; i < itemCount; i++) { 2353 Item item = clipData.getItemAt(i); 2354 content.append(item.coerceToStyledText(mTextView.getContext())); 2355 } 2356 } 2357 finally { 2358 if (dropPermissions != null) { 2359 dropPermissions.release(); 2360 } 2361 } 2362 2363 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2364 2365 Object localState = event.getLocalState(); 2366 DragLocalState dragLocalState = null; 2367 if (localState instanceof DragLocalState) { 2368 dragLocalState = (DragLocalState) localState; 2369 } 2370 boolean dragDropIntoItself = dragLocalState != null && 2371 dragLocalState.sourceTextView == mTextView; 2372 2373 if (dragDropIntoItself) { 2374 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2375 // A drop inside the original selection discards the drop. 2376 return; 2377 } 2378 } 2379 2380 final int originalLength = mTextView.getText().length(); 2381 int min = offset; 2382 int max = offset; 2383 2384 Selection.setSelection((Spannable) mTextView.getText(), max); 2385 mTextView.replaceText_internal(min, max, content); 2386 2387 if (dragDropIntoItself) { 2388 int dragSourceStart = dragLocalState.start; 2389 int dragSourceEnd = dragLocalState.end; 2390 if (max <= dragSourceStart) { 2391 // Inserting text before selection has shifted positions 2392 final int shift = mTextView.getText().length() - originalLength; 2393 dragSourceStart += shift; 2394 dragSourceEnd += shift; 2395 } 2396 2397 // Delete original selection 2398 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2399 2400 // Make sure we do not leave two adjacent spaces. 2401 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2402 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2403 if (nextCharIdx > prevCharIdx + 1) { 2404 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2405 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2406 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2407 } 2408 } 2409 } 2410 } 2411 2412 public void addSpanWatchers(Spannable text) { 2413 final int textLength = text.length(); 2414 2415 if (mKeyListener != null) { 2416 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2417 } 2418 2419 if (mSpanController == null) { 2420 mSpanController = new SpanController(); 2421 } 2422 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2423 } 2424 2425 void setContextMenuAnchor(float x, float y) { 2426 mContextMenuAnchorX = x; 2427 mContextMenuAnchorY = y; 2428 } 2429 2430 void onCreateContextMenu(ContextMenu menu) { 2431 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2432 || Float.isNaN(mContextMenuAnchorY)) { 2433 return; 2434 } 2435 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2436 if (offset == -1) { 2437 return; 2438 } 2439 mPreserveDetachedSelection = true; 2440 stopTextActionMode(); 2441 mPreserveDetachedSelection = false; 2442 final boolean isOnSelection = mTextView.hasSelection() 2443 && offset >= mTextView.getSelectionStart() && offset <= mTextView.getSelectionEnd(); 2444 if (!isOnSelection) { 2445 // Right clicked position is not on the selection. Remove the selection and move the 2446 // cursor to the right clicked position. 2447 stopTextActionMode(); 2448 Selection.setSelection((Spannable) mTextView.getText(), offset); 2449 } 2450 2451 if (shouldOfferToShowSuggestions()) { 2452 if (mSuggestionInfosInContextMenu == null) { 2453 mSuggestionInfosInContextMenu = 2454 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2455 for (int i = 0; i < mSuggestionInfosInContextMenu.length; i++) { 2456 mSuggestionInfosInContextMenu[i] = new SuggestionInfo(); 2457 } 2458 } 2459 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2460 com.android.internal.R.string.replace); 2461 mSuggestionHelper.getSuggestionInfo(mSuggestionInfosInContextMenu); 2462 int i = 0; 2463 for (final SuggestionInfo info : mSuggestionInfosInContextMenu) { 2464 info.mSuggestionEnd = info.mText.length(); 2465 subMenu.add(Menu.NONE, Menu.NONE, i++, info.mText) 2466 .setOnMenuItemClickListener(mOnContextMenuReplaceItemClickListener); 2467 } 2468 } 2469 2470 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2471 com.android.internal.R.string.undo) 2472 .setAlphabeticShortcut('z') 2473 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2474 .setEnabled(mTextView.canUndo()); 2475 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2476 com.android.internal.R.string.redo) 2477 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2478 .setEnabled(mTextView.canRedo()); 2479 2480 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2481 com.android.internal.R.string.cut) 2482 .setAlphabeticShortcut('x') 2483 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2484 .setEnabled(mTextView.canCut()); 2485 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2486 com.android.internal.R.string.copy) 2487 .setAlphabeticShortcut('c') 2488 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2489 .setEnabled(mTextView.canCopy()); 2490 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2491 com.android.internal.R.string.paste) 2492 .setAlphabeticShortcut('v') 2493 .setEnabled(mTextView.canPaste()) 2494 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2495 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2496 com.android.internal.R.string.paste_as_plain_text) 2497 .setEnabled(mTextView.canPaste()) 2498 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2499 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2500 com.android.internal.R.string.share) 2501 .setEnabled(mTextView.canShare()) 2502 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2503 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2504 com.android.internal.R.string.selectAll) 2505 .setAlphabeticShortcut('a') 2506 .setEnabled(mTextView.canSelectAllText()) 2507 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2508 2509 mPreserveDetachedSelection = true; 2510 } 2511 2512 private void replaceWithSuggestion(SuggestionInfo suggestionInfo, int spanStart, int spanEnd) { 2513 final Editable editable = (Editable) mTextView.getText(); 2514 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2515 // SuggestionSpans are removed by replace: save them before 2516 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2517 SuggestionSpan.class); 2518 final int length = suggestionSpans.length; 2519 int[] suggestionSpansStarts = new int[length]; 2520 int[] suggestionSpansEnds = new int[length]; 2521 int[] suggestionSpansFlags = new int[length]; 2522 for (int i = 0; i < length; i++) { 2523 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2524 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2525 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2526 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2527 2528 // Remove potential misspelled flags 2529 int suggestionSpanFlags = suggestionSpan.getFlags(); 2530 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2531 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2532 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2533 suggestionSpan.setFlags(suggestionSpanFlags); 2534 } 2535 } 2536 2537 // Notify source IME of the suggestion pick. Do this before swapping texts. 2538 suggestionInfo.mSuggestionSpan.notifySelection( 2539 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2540 2541 // Swap text content between actual text and Suggestion span 2542 final int suggestionStart = suggestionInfo.mSuggestionStart; 2543 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2544 final String suggestion = suggestionInfo.mText.subSequence( 2545 suggestionStart, suggestionEnd).toString(); 2546 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2547 2548 String[] suggestions = suggestionInfo.mSuggestionSpan.getSuggestions(); 2549 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2550 2551 // Restore previous SuggestionSpans 2552 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2553 for (int i = 0; i < length; i++) { 2554 // Only spans that include the modified region make sense after replacement 2555 // Spans partially included in the replaced region are removed, there is no 2556 // way to assign them a valid range after replacement 2557 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2558 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2559 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2560 } 2561 } 2562 // Move cursor at the end of the replaced word 2563 final int newCursorPosition = spanEnd + lengthDelta; 2564 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2565 } 2566 2567 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2568 new MenuItem.OnMenuItemClickListener() { 2569 @Override 2570 public boolean onMenuItemClick(MenuItem item) { 2571 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2572 return true; 2573 } 2574 return mTextView.onTextContextMenuItem(item.getItemId()); 2575 } 2576 }; 2577 2578 private final MenuItem.OnMenuItemClickListener mOnContextMenuReplaceItemClickListener = 2579 new MenuItem.OnMenuItemClickListener() { 2580 @Override 2581 public boolean onMenuItemClick(MenuItem item) { 2582 int index = item.getOrder(); 2583 if (index < 0 || index >= mSuggestionInfosInContextMenu.length) { 2584 clear(); 2585 return false; 2586 } 2587 final Spannable spannable = (Spannable) mTextView.getText(); 2588 final SuggestionSpan suggestionSpan = 2589 mSuggestionInfosInContextMenu[index].mSuggestionSpan; 2590 replaceWithSuggestion(mSuggestionInfosInContextMenu[index], 2591 spannable.getSpanStart(suggestionSpan), spannable.getSpanEnd(suggestionSpan)); 2592 clear(); 2593 return true; 2594 } 2595 2596 private void clear() { 2597 for (final SuggestionInfo info : mSuggestionInfosInContextMenu) { 2598 info.clear(); 2599 } 2600 } 2601 }; 2602 2603 /** 2604 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2605 * pop-up should be displayed. 2606 * Also monitors {@link Selection} to call back to the attached input method. 2607 */ 2608 class SpanController implements SpanWatcher { 2609 2610 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2611 2612 private EasyEditPopupWindow mPopupWindow; 2613 2614 private Runnable mHidePopup; 2615 2616 // This function is pure but inner classes can't have static functions 2617 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2618 final Object span) { 2619 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2620 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2621 } 2622 2623 @Override 2624 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2625 if (isNonIntermediateSelectionSpan(text, span)) { 2626 sendUpdateSelection(); 2627 } else if (span instanceof EasyEditSpan) { 2628 if (mPopupWindow == null) { 2629 mPopupWindow = new EasyEditPopupWindow(); 2630 mHidePopup = new Runnable() { 2631 @Override 2632 public void run() { 2633 hide(); 2634 } 2635 }; 2636 } 2637 2638 // Make sure there is only at most one EasyEditSpan in the text 2639 if (mPopupWindow.mEasyEditSpan != null) { 2640 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2641 } 2642 2643 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2644 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2645 @Override 2646 public void onDeleteClick(EasyEditSpan span) { 2647 Editable editable = (Editable) mTextView.getText(); 2648 int start = editable.getSpanStart(span); 2649 int end = editable.getSpanEnd(span); 2650 if (start >= 0 && end >= 0) { 2651 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2652 mTextView.deleteText_internal(start, end); 2653 } 2654 editable.removeSpan(span); 2655 } 2656 }); 2657 2658 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2659 // The window is not visible yet, ignore the text change. 2660 return; 2661 } 2662 2663 if (mTextView.getLayout() == null) { 2664 // The view has not been laid out yet, ignore the text change 2665 return; 2666 } 2667 2668 if (extractedTextModeWillBeStarted()) { 2669 // The input is in extract mode. Do not handle the easy edit in 2670 // the original TextView, as the ExtractEditText will do 2671 return; 2672 } 2673 2674 mPopupWindow.show(); 2675 mTextView.removeCallbacks(mHidePopup); 2676 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2677 } 2678 } 2679 2680 @Override 2681 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2682 if (isNonIntermediateSelectionSpan(text, span)) { 2683 sendUpdateSelection(); 2684 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2685 hide(); 2686 } 2687 } 2688 2689 @Override 2690 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2691 int newStart, int newEnd) { 2692 if (isNonIntermediateSelectionSpan(text, span)) { 2693 sendUpdateSelection(); 2694 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2695 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2696 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2697 text.removeSpan(easyEditSpan); 2698 } 2699 } 2700 2701 public void hide() { 2702 if (mPopupWindow != null) { 2703 mPopupWindow.hide(); 2704 mTextView.removeCallbacks(mHidePopup); 2705 } 2706 } 2707 2708 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2709 try { 2710 PendingIntent pendingIntent = span.getPendingIntent(); 2711 if (pendingIntent != null) { 2712 Intent intent = new Intent(); 2713 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2714 pendingIntent.send(mTextView.getContext(), 0, intent); 2715 } 2716 } catch (CanceledException e) { 2717 // This should not happen, as we should try to send the intent only once. 2718 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2719 } 2720 } 2721 } 2722 2723 /** 2724 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2725 */ 2726 private interface EasyEditDeleteListener { 2727 2728 /** 2729 * Clicks the delete pop-up. 2730 */ 2731 void onDeleteClick(EasyEditSpan span); 2732 } 2733 2734 /** 2735 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2736 * by {@link SpanController}. 2737 */ 2738 private class EasyEditPopupWindow extends PinnedPopupWindow 2739 implements OnClickListener { 2740 private static final int POPUP_TEXT_LAYOUT = 2741 com.android.internal.R.layout.text_edit_action_popup_text; 2742 private TextView mDeleteTextView; 2743 private EasyEditSpan mEasyEditSpan; 2744 private EasyEditDeleteListener mOnDeleteListener; 2745 2746 @Override 2747 protected void createPopupWindow() { 2748 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2749 com.android.internal.R.attr.textSelectHandleWindowStyle); 2750 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2751 mPopupWindow.setClippingEnabled(true); 2752 } 2753 2754 @Override 2755 protected void initContentView() { 2756 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2757 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2758 mContentView = linearLayout; 2759 mContentView.setBackgroundResource( 2760 com.android.internal.R.drawable.text_edit_side_paste_window); 2761 2762 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2763 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2764 2765 LayoutParams wrapContent = new LayoutParams( 2766 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2767 2768 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2769 mDeleteTextView.setLayoutParams(wrapContent); 2770 mDeleteTextView.setText(com.android.internal.R.string.delete); 2771 mDeleteTextView.setOnClickListener(this); 2772 mContentView.addView(mDeleteTextView); 2773 } 2774 2775 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2776 mEasyEditSpan = easyEditSpan; 2777 } 2778 2779 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2780 mOnDeleteListener = listener; 2781 } 2782 2783 @Override 2784 public void onClick(View view) { 2785 if (view == mDeleteTextView 2786 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2787 && mOnDeleteListener != null) { 2788 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2789 } 2790 } 2791 2792 @Override 2793 public void hide() { 2794 if (mEasyEditSpan != null) { 2795 mEasyEditSpan.setDeleteEnabled(false); 2796 } 2797 mOnDeleteListener = null; 2798 super.hide(); 2799 } 2800 2801 @Override 2802 protected int getTextOffset() { 2803 // Place the pop-up at the end of the span 2804 Editable editable = (Editable) mTextView.getText(); 2805 return editable.getSpanEnd(mEasyEditSpan); 2806 } 2807 2808 @Override 2809 protected int getVerticalLocalPosition(int line) { 2810 return mTextView.getLayout().getLineBottom(line); 2811 } 2812 2813 @Override 2814 protected int clipVertically(int positionY) { 2815 // As we display the pop-up below the span, no vertical clipping is required. 2816 return positionY; 2817 } 2818 } 2819 2820 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2821 // 3 handles 2822 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2823 // 1 CursorAnchorInfoNotifier 2824 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2825 private TextViewPositionListener[] mPositionListeners = 2826 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2827 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2828 private boolean mPositionHasChanged = true; 2829 // Absolute position of the TextView with respect to its parent window 2830 private int mPositionX, mPositionY; 2831 private int mNumberOfListeners; 2832 private boolean mScrollHasChanged; 2833 final int[] mTempCoords = new int[2]; 2834 2835 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2836 if (mNumberOfListeners == 0) { 2837 updatePosition(); 2838 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2839 vto.addOnPreDrawListener(this); 2840 } 2841 2842 int emptySlotIndex = -1; 2843 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2844 TextViewPositionListener listener = mPositionListeners[i]; 2845 if (listener == positionListener) { 2846 return; 2847 } else if (emptySlotIndex < 0 && listener == null) { 2848 emptySlotIndex = i; 2849 } 2850 } 2851 2852 mPositionListeners[emptySlotIndex] = positionListener; 2853 mCanMove[emptySlotIndex] = canMove; 2854 mNumberOfListeners++; 2855 } 2856 2857 public void removeSubscriber(TextViewPositionListener positionListener) { 2858 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2859 if (mPositionListeners[i] == positionListener) { 2860 mPositionListeners[i] = null; 2861 mNumberOfListeners--; 2862 break; 2863 } 2864 } 2865 2866 if (mNumberOfListeners == 0) { 2867 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2868 vto.removeOnPreDrawListener(this); 2869 } 2870 } 2871 2872 public int getPositionX() { 2873 return mPositionX; 2874 } 2875 2876 public int getPositionY() { 2877 return mPositionY; 2878 } 2879 2880 @Override 2881 public boolean onPreDraw() { 2882 updatePosition(); 2883 2884 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2885 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2886 TextViewPositionListener positionListener = mPositionListeners[i]; 2887 if (positionListener != null) { 2888 positionListener.updatePosition(mPositionX, mPositionY, 2889 mPositionHasChanged, mScrollHasChanged); 2890 } 2891 } 2892 } 2893 2894 mScrollHasChanged = false; 2895 return true; 2896 } 2897 2898 private void updatePosition() { 2899 mTextView.getLocationInWindow(mTempCoords); 2900 2901 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2902 2903 mPositionX = mTempCoords[0]; 2904 mPositionY = mTempCoords[1]; 2905 } 2906 2907 public void onScrollChanged() { 2908 mScrollHasChanged = true; 2909 } 2910 } 2911 2912 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2913 protected PopupWindow mPopupWindow; 2914 protected ViewGroup mContentView; 2915 int mPositionX, mPositionY; 2916 int mClippingLimitLeft, mClippingLimitRight; 2917 2918 protected abstract void createPopupWindow(); 2919 protected abstract void initContentView(); 2920 protected abstract int getTextOffset(); 2921 protected abstract int getVerticalLocalPosition(int line); 2922 protected abstract int clipVertically(int positionY); 2923 2924 public PinnedPopupWindow() { 2925 createPopupWindow(); 2926 2927 mPopupWindow.setWindowLayoutType( 2928 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2929 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2930 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2931 2932 initContentView(); 2933 2934 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2935 ViewGroup.LayoutParams.WRAP_CONTENT); 2936 mContentView.setLayoutParams(wrapContent); 2937 2938 mPopupWindow.setContentView(mContentView); 2939 } 2940 2941 public void show() { 2942 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2943 2944 computeLocalPosition(); 2945 2946 final PositionListener positionListener = getPositionListener(); 2947 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2948 } 2949 2950 protected void measureContent() { 2951 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2952 mContentView.measure( 2953 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2954 View.MeasureSpec.AT_MOST), 2955 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2956 View.MeasureSpec.AT_MOST)); 2957 } 2958 2959 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2960 * positioned according to viewportToContentHorizontalOffset. 2961 * 2962 * This method assumes that mContentView has properly been measured from its content. */ 2963 private void computeLocalPosition() { 2964 measureContent(); 2965 final int width = mContentView.getMeasuredWidth(); 2966 final int offset = getTextOffset(); 2967 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2968 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2969 2970 final int line = mTextView.getLayout().getLineForOffset(offset); 2971 mPositionY = getVerticalLocalPosition(line); 2972 mPositionY += mTextView.viewportToContentVerticalOffset(); 2973 } 2974 2975 private void updatePosition(int parentPositionX, int parentPositionY) { 2976 int positionX = parentPositionX + mPositionX; 2977 int positionY = parentPositionY + mPositionY; 2978 2979 positionY = clipVertically(positionY); 2980 2981 // Horizontal clipping 2982 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2983 final int width = mContentView.getMeasuredWidth(); 2984 positionX = Math.min( 2985 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 2986 positionX = Math.max(-mClippingLimitLeft, positionX); 2987 2988 if (isShowing()) { 2989 mPopupWindow.update(positionX, positionY, -1, -1); 2990 } else { 2991 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2992 positionX, positionY); 2993 } 2994 } 2995 2996 public void hide() { 2997 if (!isShowing()) { 2998 return; 2999 } 3000 mPopupWindow.dismiss(); 3001 getPositionListener().removeSubscriber(this); 3002 } 3003 3004 @Override 3005 public void updatePosition(int parentPositionX, int parentPositionY, 3006 boolean parentPositionChanged, boolean parentScrolled) { 3007 // Either parentPositionChanged or parentScrolled is true, check if still visible 3008 if (isShowing() && isOffsetVisible(getTextOffset())) { 3009 if (parentScrolled) computeLocalPosition(); 3010 updatePosition(parentPositionX, parentPositionY); 3011 } else { 3012 hide(); 3013 } 3014 } 3015 3016 public boolean isShowing() { 3017 return mPopupWindow.isShowing(); 3018 } 3019 } 3020 3021 private static class SuggestionInfo { 3022 // Range of actual suggestion within text 3023 int mSuggestionStart, mSuggestionEnd; 3024 3025 // The SuggestionSpan that this TextView represents 3026 @Nullable 3027 SuggestionSpan mSuggestionSpan; 3028 3029 // The index of this suggestion inside suggestionSpan 3030 int mSuggestionIndex; 3031 3032 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3033 3034 void clear() { 3035 mSuggestionSpan = null; 3036 mText.clear(); 3037 } 3038 } 3039 3040 private class SuggestionHelper { 3041 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3042 new SuggestionSpanComparator(); 3043 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3044 new HashMap<SuggestionSpan, Integer>(); 3045 3046 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3047 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3048 final int flag1 = span1.getFlags(); 3049 final int flag2 = span2.getFlags(); 3050 if (flag1 != flag2) { 3051 // The order here should match what is used in updateDrawState 3052 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3053 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3054 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3055 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3056 if (easy1 && !misspelled1) return -1; 3057 if (easy2 && !misspelled2) return 1; 3058 if (misspelled1) return -1; 3059 if (misspelled2) return 1; 3060 } 3061 3062 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3063 } 3064 } 3065 3066 /** 3067 * Returns the suggestion spans that cover the current cursor position. The suggestion 3068 * spans are sorted according to the length of text that they are attached to. 3069 */ 3070 private SuggestionSpan[] getSortedSuggestionSpans() { 3071 int pos = mTextView.getSelectionStart(); 3072 Spannable spannable = (Spannable) mTextView.getText(); 3073 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3074 3075 mSpansLengths.clear(); 3076 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3077 int start = spannable.getSpanStart(suggestionSpan); 3078 int end = spannable.getSpanEnd(suggestionSpan); 3079 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3080 } 3081 3082 // The suggestions are sorted according to their types (easy correction first, then 3083 // misspelled) and to the length of the text that they cover (shorter first). 3084 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3085 mSpansLengths.clear(); 3086 3087 return suggestionSpans; 3088 } 3089 3090 /** 3091 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3092 * position. 3093 * 3094 * @param suggestionInfos SuggestionInfo array the results will be set. 3095 * @return the number of suggestions actually fetched. 3096 */ 3097 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos) { 3098 final Spannable spannable = (Spannable) mTextView.getText(); 3099 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3100 final int nbSpans = suggestionSpans.length; 3101 if (nbSpans == 0) return 0; 3102 3103 int numberOfSuggestions = 0; 3104 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 3105 final SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 3106 final int spanStart = spannable.getSpanStart(suggestionSpan); 3107 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3108 3109 final String[] suggestions = suggestionSpan.getSuggestions(); 3110 final int nbSuggestions = suggestions.length; 3111 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3112 final String suggestion = suggestions[suggestionIndex]; 3113 boolean suggestionIsDuplicate = false; 3114 for (int i = 0; i < numberOfSuggestions; i++) { 3115 if (suggestionInfos[i].mText.toString().equals(suggestion)) { 3116 final SuggestionSpan otherSuggestionSpan = 3117 suggestionInfos[i].mSuggestionSpan; 3118 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 3119 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 3120 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3121 suggestionIsDuplicate = true; 3122 break; 3123 } 3124 } 3125 } 3126 3127 if (suggestionIsDuplicate) { 3128 continue; 3129 } 3130 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3131 suggestionInfo.mSuggestionSpan = suggestionSpan; 3132 suggestionInfo.mSuggestionIndex = suggestionIndex; 3133 suggestionInfo.mSuggestionStart = 0; 3134 suggestionInfo.mSuggestionEnd = suggestion.length(); 3135 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3136 numberOfSuggestions++; 3137 if (numberOfSuggestions >= suggestionInfos.length) { 3138 return numberOfSuggestions; 3139 } 3140 } 3141 } 3142 return numberOfSuggestions; 3143 } 3144 } 3145 3146 @VisibleForTesting 3147 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3148 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3149 3150 // Key of intent extras for inserting new word into user dictionary. 3151 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3152 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3153 3154 private SuggestionInfo[] mSuggestionInfos; 3155 private int mNumberOfSuggestions; 3156 private boolean mCursorWasVisibleBeforeSuggestions; 3157 private boolean mIsShowingUp = false; 3158 private SuggestionAdapter mSuggestionsAdapter; 3159 private final TextAppearanceSpan mHighlightSpan = new TextAppearanceSpan( 3160 mTextView.getContext(), mTextView.mTextEditSuggestionHighlightStyle); 3161 private TextView mAddToDictionaryButton; 3162 private TextView mDeleteButton; 3163 private SuggestionSpan mMisspelledSpan; 3164 private int mContainerMarginWidth; 3165 private int mContainerMarginTop; 3166 3167 private class CustomPopupWindow extends PopupWindow { 3168 @Override 3169 public void dismiss() { 3170 if (!isShowing()) { 3171 return; 3172 } 3173 super.dismiss(); 3174 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3175 3176 // Safe cast since show() checks that mTextView.getText() is an Editable 3177 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3178 3179 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3180 if (hasInsertionController()) { 3181 getInsertionController().show(); 3182 } 3183 } 3184 } 3185 3186 public SuggestionsPopupWindow() { 3187 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3188 } 3189 3190 @Override 3191 protected void createPopupWindow() { 3192 mPopupWindow = new CustomPopupWindow(); 3193 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3194 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3195 mPopupWindow.setFocusable(true); 3196 mPopupWindow.setClippingEnabled(false); 3197 } 3198 3199 @Override 3200 protected void initContentView() { 3201 final LayoutInflater inflater = (LayoutInflater) mTextView.getContext(). 3202 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3203 final ViewGroup relativeLayout = (ViewGroup) inflater.inflate( 3204 mTextView.mTextEditSuggestionContainerLayout, null); 3205 3206 final LinearLayout suggestionWindowContainer = 3207 (LinearLayout) relativeLayout.findViewById( 3208 com.android.internal.R.id.suggestionWindowContainer); 3209 ViewGroup.MarginLayoutParams lp = 3210 (ViewGroup.MarginLayoutParams) suggestionWindowContainer.getLayoutParams(); 3211 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3212 mContainerMarginTop = lp.topMargin; 3213 mClippingLimitLeft = lp.leftMargin; 3214 mClippingLimitRight = lp.rightMargin; 3215 3216 final ListView suggestionListView = (ListView) relativeLayout.findViewById( 3217 com.android.internal.R.id.suggestionContainer); 3218 3219 mSuggestionsAdapter = new SuggestionAdapter(); 3220 suggestionListView.setAdapter(mSuggestionsAdapter); 3221 suggestionListView.setOnItemClickListener(this); 3222 3223 // Inflate the suggestion items once and for all. 3224 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3225 for (int i = 0; i < mSuggestionInfos.length; i++) { 3226 mSuggestionInfos[i] = new SuggestionInfo(); 3227 } 3228 3229 mContentView = relativeLayout; 3230 3231 mAddToDictionaryButton = (TextView) relativeLayout.findViewById( 3232 com.android.internal.R.id.addToDictionaryButton); 3233 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3234 public void onClick(View v) { 3235 final Editable editable = (Editable) mTextView.getText(); 3236 final int spanStart = editable.getSpanStart(mMisspelledSpan); 3237 final int spanEnd = editable.getSpanEnd(mMisspelledSpan); 3238 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3239 3240 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3241 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3242 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3243 mTextView.getTextServicesLocale().toString()); 3244 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3245 mTextView.getContext().startActivity(intent); 3246 // There is no way to know if the word was indeed added. Re-check. 3247 // TODO The ExtractEditText should remove the span in the original text instead 3248 editable.removeSpan(mMisspelledSpan); 3249 Selection.setSelection(editable, spanEnd); 3250 updateSpellCheckSpans(spanStart, spanEnd, false); 3251 hideWithCleanUp(); 3252 } 3253 }); 3254 3255 mDeleteButton = (TextView) relativeLayout.findViewById( 3256 com.android.internal.R.id.deleteButton); 3257 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3258 public void onClick(View v) { 3259 final Editable editable = (Editable) mTextView.getText(); 3260 3261 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3262 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3263 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3264 // Do not leave two adjacent spaces after deletion, or one at beginning of 3265 // text 3266 if (spanUnionEnd < editable.length() && 3267 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 3268 (spanUnionStart == 0 || 3269 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 3270 spanUnionEnd = spanUnionEnd + 1; 3271 } 3272 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3273 } 3274 hideWithCleanUp(); 3275 } 3276 }); 3277 3278 } 3279 3280 public boolean isShowingUp() { 3281 return mIsShowingUp; 3282 } 3283 3284 public void onParentLostFocus() { 3285 mIsShowingUp = false; 3286 } 3287 3288 private class SuggestionAdapter extends BaseAdapter { 3289 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 3290 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3291 3292 @Override 3293 public int getCount() { 3294 return mNumberOfSuggestions; 3295 } 3296 3297 @Override 3298 public Object getItem(int position) { 3299 return mSuggestionInfos[position]; 3300 } 3301 3302 @Override 3303 public long getItemId(int position) { 3304 return position; 3305 } 3306 3307 @Override 3308 public View getView(int position, View convertView, ViewGroup parent) { 3309 TextView textView = (TextView) convertView; 3310 3311 if (textView == null) { 3312 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3313 parent, false); 3314 } 3315 3316 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3317 textView.setText(suggestionInfo.mText); 3318 return textView; 3319 } 3320 } 3321 3322 @VisibleForTesting 3323 public ViewGroup getContentViewForTesting() { 3324 return mContentView; 3325 } 3326 3327 @Override 3328 public void show() { 3329 if (!(mTextView.getText() instanceof Editable)) return; 3330 3331 if (updateSuggestions()) { 3332 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3333 mTextView.setCursorVisible(false); 3334 mIsShowingUp = true; 3335 super.show(); 3336 } 3337 } 3338 3339 @Override 3340 protected void measureContent() { 3341 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3342 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3343 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3344 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3345 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3346 3347 int width = 0; 3348 View view = null; 3349 for (int i = 0; i < mNumberOfSuggestions; i++) { 3350 view = mSuggestionsAdapter.getView(i, view, mContentView); 3351 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3352 view.measure(horizontalMeasure, verticalMeasure); 3353 width = Math.max(width, view.getMeasuredWidth()); 3354 } 3355 3356 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3357 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3358 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3359 } 3360 3361 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3362 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3363 3364 width += mContainerMarginWidth; 3365 3366 // Enforce the width based on actual text widths 3367 mContentView.measure( 3368 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3369 verticalMeasure); 3370 3371 Drawable popupBackground = mPopupWindow.getBackground(); 3372 if (popupBackground != null) { 3373 if (mTempRect == null) mTempRect = new Rect(); 3374 popupBackground.getPadding(mTempRect); 3375 width += mTempRect.left + mTempRect.right; 3376 } 3377 mPopupWindow.setWidth(width); 3378 } 3379 3380 @Override 3381 protected int getTextOffset() { 3382 return mTextView.getSelectionStart(); 3383 } 3384 3385 @Override 3386 protected int getVerticalLocalPosition(int line) { 3387 return mTextView.getLayout().getLineBottom(line) - mContainerMarginTop; 3388 } 3389 3390 @Override 3391 protected int clipVertically(int positionY) { 3392 final int height = mContentView.getMeasuredHeight(); 3393 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3394 return Math.min(positionY, displayMetrics.heightPixels - height); 3395 } 3396 3397 private void hideWithCleanUp() { 3398 for (final SuggestionInfo info : mSuggestionInfos) { 3399 info.clear(); 3400 } 3401 mMisspelledSpan = null; 3402 hide(); 3403 } 3404 3405 private boolean updateSuggestions() { 3406 Spannable spannable = (Spannable) mTextView.getText(); 3407 mNumberOfSuggestions = 3408 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos); 3409 if (mNumberOfSuggestions == 0) { 3410 return false; 3411 } 3412 3413 int spanUnionStart = mTextView.getText().length(); 3414 int spanUnionEnd = 0; 3415 3416 mMisspelledSpan = null; 3417 for (int i = 0; i < mNumberOfSuggestions; i++) { 3418 final SuggestionInfo suggestionInfo = mSuggestionInfos[i]; 3419 final SuggestionSpan suggestionSpan = suggestionInfo.mSuggestionSpan; 3420 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3421 mMisspelledSpan = suggestionSpan; 3422 } 3423 final int spanStart = spannable.getSpanStart(suggestionSpan); 3424 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3425 spanUnionStart = Math.min(spanUnionStart, spanStart); 3426 spanUnionEnd = Math.max(spanUnionEnd, spanEnd); 3427 } 3428 3429 for (int i = 0; i < mNumberOfSuggestions; i++) { 3430 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3431 } 3432 3433 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3434 int addToDictionaryButtonVisibility = View.GONE; 3435 if (mMisspelledSpan != null) { 3436 final int misspelledStart = spannable.getSpanStart(mMisspelledSpan); 3437 final int misspelledEnd = spannable.getSpanEnd(mMisspelledSpan); 3438 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 3439 addToDictionaryButtonVisibility = View.VISIBLE; 3440 } 3441 } 3442 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3443 3444 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3445 final int underlineColor = mSuggestionInfos[0].mSuggestionSpan.getUnderlineColor(); 3446 if (underlineColor == 0) { 3447 // Fallback on the default highlight color when the first span does not provide one 3448 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3449 } else { 3450 final float BACKGROUND_TRANSPARENCY = 0.4f; 3451 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3452 mSuggestionRangeSpan.setBackgroundColor( 3453 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3454 } 3455 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3456 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3457 3458 mSuggestionsAdapter.notifyDataSetChanged(); 3459 return true; 3460 } 3461 3462 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3463 int unionEnd) { 3464 final Spannable text = (Spannable) mTextView.getText(); 3465 final int spanStart = text.getSpanStart(suggestionInfo.mSuggestionSpan); 3466 final int spanEnd = text.getSpanEnd(suggestionInfo.mSuggestionSpan); 3467 3468 // Adjust the start/end of the suggestion span 3469 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3470 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3471 + suggestionInfo.mText.length(); 3472 3473 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3474 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3475 3476 // Add the text before and after the span. 3477 final String textAsString = text.toString(); 3478 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3479 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3480 } 3481 3482 @Override 3483 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3484 Editable editable = (Editable) mTextView.getText(); 3485 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3486 3487 final int spanStart = editable.getSpanStart(suggestionInfo.mSuggestionSpan); 3488 final int spanEnd = editable.getSpanEnd(suggestionInfo.mSuggestionSpan); 3489 if (spanStart < 0 || spanEnd <= spanStart) { 3490 // Span has been removed 3491 hideWithCleanUp(); 3492 return; 3493 } 3494 replaceWithSuggestion(suggestionInfo, spanStart, spanEnd); 3495 hideWithCleanUp(); 3496 } 3497 } 3498 3499 /** 3500 * An ActionMode Callback class that is used to provide actions while in text insertion or 3501 * selection mode. 3502 * 3503 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3504 * actions, depending on which of these this TextView supports and the current selection. 3505 */ 3506 private class TextActionModeCallback extends ActionMode.Callback2 { 3507 private final Path mSelectionPath = new Path(); 3508 private final RectF mSelectionBounds = new RectF(); 3509 private final boolean mHasSelection; 3510 3511 private int mHandleHeight; 3512 3513 public TextActionModeCallback(boolean hasSelection) { 3514 mHasSelection = hasSelection; 3515 if (mHasSelection) { 3516 SelectionModifierCursorController selectionController = getSelectionController(); 3517 if (selectionController.mStartHandle == null) { 3518 // As these are for initializing selectionController, hide() must be called. 3519 selectionController.initDrawables(); 3520 selectionController.initHandles(); 3521 selectionController.hide(); 3522 } 3523 mHandleHeight = Math.max( 3524 mSelectHandleLeft.getMinimumHeight(), 3525 mSelectHandleRight.getMinimumHeight()); 3526 } else { 3527 InsertionPointCursorController insertionController = getInsertionController(); 3528 if (insertionController != null) { 3529 insertionController.getHandle(); 3530 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3531 } 3532 } 3533 } 3534 3535 @Override 3536 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3537 mode.setTitle(null); 3538 mode.setSubtitle(null); 3539 mode.setTitleOptionalHint(true); 3540 populateMenuWithItems(menu); 3541 3542 Callback customCallback = getCustomCallback(); 3543 if (customCallback != null) { 3544 if (!customCallback.onCreateActionMode(mode, menu)) { 3545 // The custom mode can choose to cancel the action mode, dismiss selection. 3546 Selection.setSelection((Spannable) mTextView.getText(), 3547 mTextView.getSelectionEnd()); 3548 return false; 3549 } 3550 } 3551 3552 if (mTextView.canProcessText()) { 3553 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3554 } 3555 3556 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3557 mTextView.setHasTransientState(true); 3558 return true; 3559 } else { 3560 return false; 3561 } 3562 } 3563 3564 private Callback getCustomCallback() { 3565 return mHasSelection 3566 ? mCustomSelectionActionModeCallback 3567 : mCustomInsertionActionModeCallback; 3568 } 3569 3570 private void populateMenuWithItems(Menu menu) { 3571 if (mTextView.canCut()) { 3572 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3573 com.android.internal.R.string.cut). 3574 setAlphabeticShortcut('x'). 3575 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3576 } 3577 3578 if (mTextView.canCopy()) { 3579 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3580 com.android.internal.R.string.copy). 3581 setAlphabeticShortcut('c'). 3582 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3583 } 3584 3585 if (mTextView.canPaste()) { 3586 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3587 com.android.internal.R.string.paste). 3588 setAlphabeticShortcut('v'). 3589 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3590 } 3591 3592 if (mTextView.canShare()) { 3593 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3594 com.android.internal.R.string.share). 3595 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3596 } 3597 3598 updateSelectAllItem(menu); 3599 updateReplaceItem(menu); 3600 } 3601 3602 @Override 3603 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3604 updateSelectAllItem(menu); 3605 updateReplaceItem(menu); 3606 3607 Callback customCallback = getCustomCallback(); 3608 if (customCallback != null) { 3609 return customCallback.onPrepareActionMode(mode, menu); 3610 } 3611 return true; 3612 } 3613 3614 private void updateSelectAllItem(Menu menu) { 3615 boolean canSelectAll = mTextView.canSelectAllText(); 3616 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3617 if (canSelectAll && !selectAllItemExists) { 3618 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3619 com.android.internal.R.string.selectAll) 3620 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3621 } else if (!canSelectAll && selectAllItemExists) { 3622 menu.removeItem(TextView.ID_SELECT_ALL); 3623 } 3624 } 3625 3626 private void updateReplaceItem(Menu menu) { 3627 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions() 3628 && !(mTextView.isInExtractedMode() && mTextView.hasSelection()); 3629 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3630 if (canReplace && !replaceItemExists) { 3631 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3632 com.android.internal.R.string.replace) 3633 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3634 } else if (!canReplace && replaceItemExists) { 3635 menu.removeItem(TextView.ID_REPLACE); 3636 } 3637 } 3638 3639 @Override 3640 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3641 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3642 return true; 3643 } 3644 Callback customCallback = getCustomCallback(); 3645 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3646 return true; 3647 } 3648 return mTextView.onTextContextMenuItem(item.getItemId()); 3649 } 3650 3651 @Override 3652 public void onDestroyActionMode(ActionMode mode) { 3653 Callback customCallback = getCustomCallback(); 3654 if (customCallback != null) { 3655 customCallback.onDestroyActionMode(mode); 3656 } 3657 3658 /* 3659 * If we're ending this mode because we're detaching from a window, 3660 * we still have selection state to preserve. Don't clear it, we'll 3661 * bring back the selection mode when (if) we get reattached. 3662 */ 3663 if (!mPreserveDetachedSelection) { 3664 Selection.setSelection((Spannable) mTextView.getText(), 3665 mTextView.getSelectionEnd()); 3666 mTextView.setHasTransientState(false); 3667 } 3668 3669 if (mSelectionModifierCursorController != null) { 3670 mSelectionModifierCursorController.hide(); 3671 } 3672 3673 mTextActionMode = null; 3674 } 3675 3676 @Override 3677 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3678 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3679 super.onGetContentRect(mode, view, outRect); 3680 return; 3681 } 3682 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3683 // We have a selection. 3684 mSelectionPath.reset(); 3685 mTextView.getLayout().getSelectionPath( 3686 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3687 mSelectionPath.computeBounds(mSelectionBounds, true); 3688 mSelectionBounds.bottom += mHandleHeight; 3689 } else if (mCursorCount == 2) { 3690 // We have a split cursor. In this case, we take the rectangle that includes both 3691 // parts of the cursor to ensure we don't obscure either of them. 3692 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3693 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3694 mSelectionBounds.set( 3695 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3696 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3697 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3698 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3699 + mHandleHeight); 3700 } else { 3701 // We have a single cursor. 3702 Layout layout = getActiveLayout(); 3703 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 3704 float primaryHorizontal = 3705 layout.getPrimaryHorizontal(mTextView.getSelectionStart()); 3706 mSelectionBounds.set( 3707 primaryHorizontal, 3708 layout.getLineTop(line), 3709 primaryHorizontal, 3710 layout.getLineTop(line + 1) + mHandleHeight); 3711 } 3712 // Take TextView's padding and scroll into account. 3713 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3714 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3715 outRect.set( 3716 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3717 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3718 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3719 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3720 } 3721 } 3722 3723 /** 3724 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3725 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3726 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3727 */ 3728 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3729 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3730 final int[] mTmpIntOffset = new int[2]; 3731 final Matrix mViewToScreenMatrix = new Matrix(); 3732 3733 @Override 3734 public void updatePosition(int parentPositionX, int parentPositionY, 3735 boolean parentPositionChanged, boolean parentScrolled) { 3736 final InputMethodState ims = mInputMethodState; 3737 if (ims == null || ims.mBatchEditNesting > 0) { 3738 return; 3739 } 3740 final InputMethodManager imm = InputMethodManager.peekInstance(); 3741 if (null == imm) { 3742 return; 3743 } 3744 if (!imm.isActive(mTextView)) { 3745 return; 3746 } 3747 // Skip if the IME has not requested the cursor/anchor position. 3748 if (!imm.isCursorAnchorInfoEnabled()) { 3749 return; 3750 } 3751 Layout layout = mTextView.getLayout(); 3752 if (layout == null) { 3753 return; 3754 } 3755 3756 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3757 builder.reset(); 3758 3759 final int selectionStart = mTextView.getSelectionStart(); 3760 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3761 3762 // Construct transformation matrix from view local coordinates to screen coordinates. 3763 mViewToScreenMatrix.set(mTextView.getMatrix()); 3764 mTextView.getLocationOnScreen(mTmpIntOffset); 3765 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3766 builder.setMatrix(mViewToScreenMatrix); 3767 3768 final float viewportToContentHorizontalOffset = 3769 mTextView.viewportToContentHorizontalOffset(); 3770 final float viewportToContentVerticalOffset = 3771 mTextView.viewportToContentVerticalOffset(); 3772 3773 final CharSequence text = mTextView.getText(); 3774 if (text instanceof Spannable) { 3775 final Spannable sp = (Spannable) text; 3776 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3777 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3778 if (composingTextEnd < composingTextStart) { 3779 final int temp = composingTextEnd; 3780 composingTextEnd = composingTextStart; 3781 composingTextStart = temp; 3782 } 3783 final boolean hasComposingText = 3784 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3785 if (hasComposingText) { 3786 final CharSequence composingText = text.subSequence(composingTextStart, 3787 composingTextEnd); 3788 builder.setComposingText(composingTextStart, composingText); 3789 3790 final int minLine = layout.getLineForOffset(composingTextStart); 3791 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3792 for (int line = minLine; line <= maxLine; ++line) { 3793 final int lineStart = layout.getLineStart(line); 3794 final int lineEnd = layout.getLineEnd(line); 3795 final int offsetStart = Math.max(lineStart, composingTextStart); 3796 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3797 final boolean ltrLine = 3798 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3799 final float[] widths = new float[offsetEnd - offsetStart]; 3800 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3801 final float top = layout.getLineTop(line); 3802 final float bottom = layout.getLineBottom(line); 3803 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3804 final float charWidth = widths[offset - offsetStart]; 3805 final boolean isRtl = layout.isRtlCharAt(offset); 3806 final float primary = layout.getPrimaryHorizontal(offset); 3807 final float secondary = layout.getSecondaryHorizontal(offset); 3808 // TODO: This doesn't work perfectly for text with custom styles and 3809 // TAB chars. 3810 final float left; 3811 final float right; 3812 if (ltrLine) { 3813 if (isRtl) { 3814 left = secondary - charWidth; 3815 right = secondary; 3816 } else { 3817 left = primary; 3818 right = primary + charWidth; 3819 } 3820 } else { 3821 if (!isRtl) { 3822 left = secondary; 3823 right = secondary + charWidth; 3824 } else { 3825 left = primary - charWidth; 3826 right = primary; 3827 } 3828 } 3829 // TODO: Check top-right and bottom-left as well. 3830 final float localLeft = left + viewportToContentHorizontalOffset; 3831 final float localRight = right + viewportToContentHorizontalOffset; 3832 final float localTop = top + viewportToContentVerticalOffset; 3833 final float localBottom = bottom + viewportToContentVerticalOffset; 3834 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3835 final boolean isBottomRightVisible = 3836 isPositionVisible(localRight, localBottom); 3837 int characterBoundsFlags = 0; 3838 if (isTopLeftVisible || isBottomRightVisible) { 3839 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3840 } 3841 if (!isTopLeftVisible || !isBottomRightVisible) { 3842 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3843 } 3844 if (isRtl) { 3845 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3846 } 3847 // Here offset is the index in Java chars. 3848 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3849 localBottom, characterBoundsFlags); 3850 } 3851 } 3852 } 3853 } 3854 3855 // Treat selectionStart as the insertion point. 3856 if (0 <= selectionStart) { 3857 final int offset = selectionStart; 3858 final int line = layout.getLineForOffset(offset); 3859 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3860 + viewportToContentHorizontalOffset; 3861 final float insertionMarkerTop = layout.getLineTop(line) 3862 + viewportToContentVerticalOffset; 3863 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3864 + viewportToContentVerticalOffset; 3865 final float insertionMarkerBottom = layout.getLineBottom(line) 3866 + viewportToContentVerticalOffset; 3867 final boolean isTopVisible = 3868 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3869 final boolean isBottomVisible = 3870 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3871 int insertionMarkerFlags = 0; 3872 if (isTopVisible || isBottomVisible) { 3873 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3874 } 3875 if (!isTopVisible || !isBottomVisible) { 3876 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3877 } 3878 if (layout.isRtlCharAt(offset)) { 3879 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3880 } 3881 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3882 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3883 } 3884 3885 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3886 } 3887 } 3888 3889 @VisibleForTesting 3890 public abstract class HandleView extends View implements TextViewPositionListener { 3891 protected Drawable mDrawable; 3892 protected Drawable mDrawableLtr; 3893 protected Drawable mDrawableRtl; 3894 private final PopupWindow mContainer; 3895 // Position with respect to the parent TextView 3896 private int mPositionX, mPositionY; 3897 private boolean mIsDragging; 3898 // Offset from touch position to mPosition 3899 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3900 protected int mHotspotX; 3901 protected int mHorizontalGravity; 3902 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3903 private float mTouchOffsetY; 3904 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3905 private float mIdealVerticalOffset; 3906 // Parent's (TextView) previous position in window 3907 private int mLastParentX, mLastParentY; 3908 // Previous text character offset 3909 protected int mPreviousOffset = -1; 3910 // Previous text character offset 3911 private boolean mPositionHasChanged = true; 3912 // Minimum touch target size for handles 3913 private int mMinSize; 3914 // Indicates the line of text that the handle is on. 3915 protected int mPrevLine = UNSET_LINE; 3916 // Indicates the line of text that the user was touching. This can differ from mPrevLine 3917 // when selecting text when the handles jump to the end / start of words which may be on 3918 // a different line. 3919 protected int mPreviousLineTouched = UNSET_LINE; 3920 3921 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 3922 super(mTextView.getContext()); 3923 setId(id); 3924 mContainer = new PopupWindow(mTextView.getContext(), null, 3925 com.android.internal.R.attr.textSelectHandleWindowStyle); 3926 mContainer.setSplitTouchEnabled(true); 3927 mContainer.setClippingEnabled(false); 3928 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3929 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3930 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3931 mContainer.setContentView(this); 3932 3933 mDrawableLtr = drawableLtr; 3934 mDrawableRtl = drawableRtl; 3935 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3936 com.android.internal.R.dimen.text_handle_min_size); 3937 3938 updateDrawable(); 3939 3940 final int handleHeight = getPreferredHeight(); 3941 mTouchOffsetY = -0.3f * handleHeight; 3942 mIdealVerticalOffset = 0.7f * handleHeight; 3943 } 3944 3945 public float getIdealVerticalOffset() { 3946 return mIdealVerticalOffset; 3947 } 3948 3949 protected void updateDrawable() { 3950 if (mIsDragging) { 3951 // Don't update drawable during dragging. 3952 return; 3953 } 3954 final int offset = getCurrentCursorOffset(); 3955 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3956 final Drawable oldDrawable = mDrawable; 3957 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3958 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3959 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3960 final Layout layout = mTextView.getLayout(); 3961 if (layout != null && oldDrawable != mDrawable && isShowing()) { 3962 // Update popup window position. 3963 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX - 3964 getHorizontalOffset() + getCursorOffset(); 3965 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3966 mPositionHasChanged = true; 3967 updatePosition(mLastParentX, mLastParentY, false, false); 3968 postInvalidate(); 3969 } 3970 } 3971 3972 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3973 protected abstract int getHorizontalGravity(boolean isRtlRun); 3974 3975 // Touch-up filter: number of previous positions remembered 3976 private static final int HISTORY_SIZE = 5; 3977 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3978 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3979 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3980 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3981 private int mPreviousOffsetIndex = 0; 3982 private int mNumberPreviousOffsets = 0; 3983 3984 private void startTouchUpFilter(int offset) { 3985 mNumberPreviousOffsets = 0; 3986 addPositionToTouchUpFilter(offset); 3987 } 3988 3989 private void addPositionToTouchUpFilter(int offset) { 3990 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3991 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3992 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3993 mNumberPreviousOffsets++; 3994 } 3995 3996 private void filterOnTouchUp() { 3997 final long now = SystemClock.uptimeMillis(); 3998 int i = 0; 3999 int index = mPreviousOffsetIndex; 4000 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4001 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4002 i++; 4003 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4004 } 4005 4006 if (i > 0 && i < iMax && 4007 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4008 positionAtCursorOffset(mPreviousOffsets[index], false); 4009 } 4010 } 4011 4012 public boolean offsetHasBeenChanged() { 4013 return mNumberPreviousOffsets > 1; 4014 } 4015 4016 @Override 4017 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4018 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4019 } 4020 4021 private int getPreferredWidth() { 4022 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4023 } 4024 4025 private int getPreferredHeight() { 4026 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4027 } 4028 4029 public void show() { 4030 if (isShowing()) return; 4031 4032 getPositionListener().addSubscriber(this, true /* local position may change */); 4033 4034 // Make sure the offset is always considered new, even when focusing at same position 4035 mPreviousOffset = -1; 4036 positionAtCursorOffset(getCurrentCursorOffset(), false); 4037 } 4038 4039 protected void dismiss() { 4040 mIsDragging = false; 4041 mContainer.dismiss(); 4042 onDetached(); 4043 } 4044 4045 public void hide() { 4046 dismiss(); 4047 4048 getPositionListener().removeSubscriber(this); 4049 } 4050 4051 public boolean isShowing() { 4052 return mContainer.isShowing(); 4053 } 4054 4055 private boolean isVisible() { 4056 // Always show a dragging handle. 4057 if (mIsDragging) { 4058 return true; 4059 } 4060 4061 if (mTextView.isInBatchEditMode()) { 4062 return false; 4063 } 4064 4065 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4066 } 4067 4068 public abstract int getCurrentCursorOffset(); 4069 4070 protected abstract void updateSelection(int offset); 4071 4072 public abstract void updatePosition(float x, float y); 4073 4074 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4075 // A HandleView relies on the layout, which may be nulled by external methods 4076 Layout layout = mTextView.getLayout(); 4077 if (layout == null) { 4078 // Will update controllers' state, hiding them and stopping selection mode if needed 4079 prepareCursorControllers(); 4080 return; 4081 } 4082 layout = getActiveLayout(); 4083 4084 boolean offsetChanged = offset != mPreviousOffset; 4085 if (offsetChanged || parentScrolled) { 4086 if (offsetChanged) { 4087 updateSelection(offset); 4088 addPositionToTouchUpFilter(offset); 4089 } 4090 final int line = layout.getLineForOffset(offset); 4091 mPrevLine = line; 4092 4093 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX - 4094 getHorizontalOffset() + getCursorOffset(); 4095 mPositionY = layout.getLineBottom(line); 4096 4097 // Take TextView's padding and scroll into account. 4098 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4099 mPositionY += mTextView.viewportToContentVerticalOffset(); 4100 4101 mPreviousOffset = offset; 4102 mPositionHasChanged = true; 4103 } 4104 } 4105 4106 /** 4107 * Return the clamped horizontal position for the first cursor. 4108 * 4109 * @param layout Text layout. 4110 * @param offset Character offset for the cursor. 4111 * @return The clamped horizontal position for the cursor. 4112 */ 4113 int getCursorHorizontalPosition(Layout layout, int offset) { 4114 return (int) (layout.getPrimaryHorizontal(offset) - 0.5f); 4115 } 4116 4117 public void updatePosition(int parentPositionX, int parentPositionY, 4118 boolean parentPositionChanged, boolean parentScrolled) { 4119 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 4120 if (parentPositionChanged || mPositionHasChanged) { 4121 if (mIsDragging) { 4122 // Update touchToWindow offset in case of parent scrolling while dragging 4123 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4124 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4125 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4126 mLastParentX = parentPositionX; 4127 mLastParentY = parentPositionY; 4128 } 4129 4130 onHandleMoved(); 4131 } 4132 4133 if (isVisible()) { 4134 // Transform to the window coordinates to follow the view tranformation. 4135 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4136 mTextView.transformFromViewToWindowSpace(pts); 4137 pts[0] -= mHotspotX + getHorizontalOffset(); 4138 4139 if (isShowing()) { 4140 mContainer.update(pts[0], pts[1], -1, -1); 4141 } else { 4142 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4143 } 4144 } else { 4145 if (isShowing()) { 4146 dismiss(); 4147 } 4148 } 4149 4150 mPositionHasChanged = false; 4151 } 4152 } 4153 4154 @Override 4155 protected void onDraw(Canvas c) { 4156 final int drawWidth = mDrawable.getIntrinsicWidth(); 4157 final int left = getHorizontalOffset(); 4158 4159 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4160 mDrawable.draw(c); 4161 } 4162 4163 private int getHorizontalOffset() { 4164 final int width = getPreferredWidth(); 4165 final int drawWidth = mDrawable.getIntrinsicWidth(); 4166 final int left; 4167 switch (mHorizontalGravity) { 4168 case Gravity.LEFT: 4169 left = 0; 4170 break; 4171 default: 4172 case Gravity.CENTER: 4173 left = (width - drawWidth) / 2; 4174 break; 4175 case Gravity.RIGHT: 4176 left = width - drawWidth; 4177 break; 4178 } 4179 return left; 4180 } 4181 4182 protected int getCursorOffset() { 4183 return 0; 4184 } 4185 4186 @Override 4187 public boolean onTouchEvent(MotionEvent ev) { 4188 updateFloatingToolbarVisibility(ev); 4189 4190 switch (ev.getActionMasked()) { 4191 case MotionEvent.ACTION_DOWN: { 4192 startTouchUpFilter(getCurrentCursorOffset()); 4193 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 4194 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 4195 4196 final PositionListener positionListener = getPositionListener(); 4197 mLastParentX = positionListener.getPositionX(); 4198 mLastParentY = positionListener.getPositionY(); 4199 mIsDragging = true; 4200 mPreviousLineTouched = UNSET_LINE; 4201 break; 4202 } 4203 4204 case MotionEvent.ACTION_MOVE: { 4205 final float rawX = ev.getRawX(); 4206 final float rawY = ev.getRawY(); 4207 4208 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4209 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4210 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 4211 float newVerticalOffset; 4212 if (previousVerticalOffset < mIdealVerticalOffset) { 4213 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4214 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4215 } else { 4216 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4217 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4218 } 4219 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4220 4221 final float newPosX = 4222 rawX - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4223 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 4224 4225 updatePosition(newPosX, newPosY); 4226 break; 4227 } 4228 4229 case MotionEvent.ACTION_UP: 4230 filterOnTouchUp(); 4231 mIsDragging = false; 4232 updateDrawable(); 4233 break; 4234 4235 case MotionEvent.ACTION_CANCEL: 4236 mIsDragging = false; 4237 updateDrawable(); 4238 break; 4239 } 4240 return true; 4241 } 4242 4243 public boolean isDragging() { 4244 return mIsDragging; 4245 } 4246 4247 void onHandleMoved() {} 4248 4249 public void onDetached() {} 4250 } 4251 4252 /** 4253 * Returns the active layout (hint or text layout). Note that the text layout can be null. 4254 */ 4255 private Layout getActiveLayout() { 4256 Layout layout = mTextView.getLayout(); 4257 Layout hintLayout = mTextView.getHintLayout(); 4258 if (TextUtils.isEmpty(layout.getText()) && hintLayout != null && 4259 !TextUtils.isEmpty(hintLayout.getText())) { 4260 layout = hintLayout; 4261 } 4262 return layout; 4263 } 4264 4265 private class InsertionHandleView extends HandleView { 4266 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4267 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4268 4269 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4270 private float mDownPositionX, mDownPositionY; 4271 private Runnable mHider; 4272 4273 public InsertionHandleView(Drawable drawable) { 4274 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4275 } 4276 4277 @Override 4278 public void show() { 4279 super.show(); 4280 4281 final long durationSinceCutOrCopy = 4282 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4283 4284 // Cancel the single tap delayed runnable. 4285 if (mInsertionActionModeRunnable != null 4286 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4287 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4288 || isCursorInsideEasyCorrectionSpan())) { 4289 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4290 } 4291 4292 // Prepare and schedule the single tap runnable to run exactly after the double tap 4293 // timeout has passed. 4294 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4295 && !isCursorInsideEasyCorrectionSpan() 4296 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4297 if (mTextActionMode == null) { 4298 if (mInsertionActionModeRunnable == null) { 4299 mInsertionActionModeRunnable = new Runnable() { 4300 @Override 4301 public void run() { 4302 startInsertionActionMode(); 4303 } 4304 }; 4305 } 4306 mTextView.postDelayed( 4307 mInsertionActionModeRunnable, 4308 ViewConfiguration.getDoubleTapTimeout() + 1); 4309 } 4310 4311 } 4312 4313 hideAfterDelay(); 4314 } 4315 4316 private void hideAfterDelay() { 4317 if (mHider == null) { 4318 mHider = new Runnable() { 4319 public void run() { 4320 hide(); 4321 } 4322 }; 4323 } else { 4324 removeHiderCallback(); 4325 } 4326 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4327 } 4328 4329 private void removeHiderCallback() { 4330 if (mHider != null) { 4331 mTextView.removeCallbacks(mHider); 4332 } 4333 } 4334 4335 @Override 4336 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4337 return drawable.getIntrinsicWidth() / 2; 4338 } 4339 4340 @Override 4341 protected int getHorizontalGravity(boolean isRtlRun) { 4342 return Gravity.CENTER_HORIZONTAL; 4343 } 4344 4345 @Override 4346 protected int getCursorOffset() { 4347 int offset = super.getCursorOffset(); 4348 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4349 if (cursor != null) { 4350 cursor.getPadding(mTempRect); 4351 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4352 } 4353 return offset; 4354 } 4355 4356 @Override 4357 int getCursorHorizontalPosition(Layout layout, int offset) { 4358 final Drawable drawable = mCursorCount > 0 ? mCursorDrawable[0] : null; 4359 if (drawable != null) { 4360 final float horizontal = layout.getPrimaryHorizontal(offset); 4361 return clampCursorHorizontalPosition(drawable, horizontal) + mTempRect.left; 4362 } 4363 return super.getCursorHorizontalPosition(layout, offset); 4364 } 4365 4366 @Override 4367 public boolean onTouchEvent(MotionEvent ev) { 4368 final boolean result = super.onTouchEvent(ev); 4369 4370 switch (ev.getActionMasked()) { 4371 case MotionEvent.ACTION_DOWN: 4372 mDownPositionX = ev.getRawX(); 4373 mDownPositionY = ev.getRawY(); 4374 break; 4375 4376 case MotionEvent.ACTION_UP: 4377 if (!offsetHasBeenChanged()) { 4378 final float deltaX = mDownPositionX - ev.getRawX(); 4379 final float deltaY = mDownPositionY - ev.getRawY(); 4380 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4381 4382 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4383 mTextView.getContext()); 4384 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4385 4386 if (distanceSquared < touchSlop * touchSlop) { 4387 // Tapping on the handle toggles the insertion action mode. 4388 if (mTextActionMode != null) { 4389 mTextActionMode.finish(); 4390 } else { 4391 startInsertionActionMode(); 4392 } 4393 } 4394 } else { 4395 if (mTextActionMode != null) { 4396 mTextActionMode.invalidateContentRect(); 4397 } 4398 } 4399 hideAfterDelay(); 4400 break; 4401 4402 case MotionEvent.ACTION_CANCEL: 4403 hideAfterDelay(); 4404 break; 4405 4406 default: 4407 break; 4408 } 4409 4410 return result; 4411 } 4412 4413 @Override 4414 public int getCurrentCursorOffset() { 4415 return mTextView.getSelectionStart(); 4416 } 4417 4418 @Override 4419 public void updateSelection(int offset) { 4420 Selection.setSelection((Spannable) mTextView.getText(), offset); 4421 } 4422 4423 @Override 4424 public void updatePosition(float x, float y) { 4425 Layout layout = mTextView.getLayout(); 4426 int offset; 4427 if (layout != null) { 4428 if (mPreviousLineTouched == UNSET_LINE) { 4429 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4430 } 4431 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4432 offset = mTextView.getOffsetAtCoordinate(currLine, x); 4433 mPreviousLineTouched = currLine; 4434 } else { 4435 offset = mTextView.getOffsetForPosition(x, y); 4436 } 4437 positionAtCursorOffset(offset, false); 4438 if (mTextActionMode != null) { 4439 mTextActionMode.invalidate(); 4440 } 4441 } 4442 4443 @Override 4444 void onHandleMoved() { 4445 super.onHandleMoved(); 4446 removeHiderCallback(); 4447 } 4448 4449 @Override 4450 public void onDetached() { 4451 super.onDetached(); 4452 removeHiderCallback(); 4453 } 4454 } 4455 4456 @Retention(RetentionPolicy.SOURCE) 4457 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4458 public @interface HandleType {} 4459 public static final int HANDLE_TYPE_SELECTION_START = 0; 4460 public static final int HANDLE_TYPE_SELECTION_END = 1; 4461 4462 private class SelectionHandleView extends HandleView { 4463 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4464 // end (HANDLE_TYPE_SELECTION_END). 4465 @HandleType 4466 private final int mHandleType; 4467 // Indicates whether the cursor is making adjustments within a word. 4468 private boolean mInWord = false; 4469 // Difference between touch position and word boundary position. 4470 private float mTouchWordDelta; 4471 // X value of the previous updatePosition call. 4472 private float mPrevX; 4473 // Indicates if the handle has moved a boundary between LTR and RTL text. 4474 private boolean mLanguageDirectionChanged = false; 4475 // Distance from edge of horizontally scrolling text view 4476 // to use to switch to character mode. 4477 private final float mTextViewEdgeSlop; 4478 // Used to save text view location. 4479 private final int[] mTextViewLocation = new int[2]; 4480 4481 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4482 @HandleType int handleType) { 4483 super(drawableLtr, drawableRtl, id); 4484 mHandleType = handleType; 4485 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4486 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4487 } 4488 4489 private boolean isStartHandle() { 4490 return mHandleType == HANDLE_TYPE_SELECTION_START; 4491 } 4492 4493 @Override 4494 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4495 if (isRtlRun == isStartHandle()) { 4496 return drawable.getIntrinsicWidth() / 4; 4497 } else { 4498 return (drawable.getIntrinsicWidth() * 3) / 4; 4499 } 4500 } 4501 4502 @Override 4503 protected int getHorizontalGravity(boolean isRtlRun) { 4504 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4505 } 4506 4507 @Override 4508 public int getCurrentCursorOffset() { 4509 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4510 } 4511 4512 @Override 4513 protected void updateSelection(int offset) { 4514 if (isStartHandle()) { 4515 Selection.setSelection((Spannable) mTextView.getText(), offset, 4516 mTextView.getSelectionEnd()); 4517 } else { 4518 Selection.setSelection((Spannable) mTextView.getText(), 4519 mTextView.getSelectionStart(), offset); 4520 } 4521 updateDrawable(); 4522 if (mTextActionMode != null) { 4523 mTextActionMode.invalidate(); 4524 } 4525 } 4526 4527 @Override 4528 public void updatePosition(float x, float y) { 4529 final Layout layout = mTextView.getLayout(); 4530 if (layout == null) { 4531 // HandleView will deal appropriately in positionAtCursorOffset when 4532 // layout is null. 4533 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y)); 4534 return; 4535 } 4536 4537 if (mPreviousLineTouched == UNSET_LINE) { 4538 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4539 } 4540 4541 boolean positionCursor = false; 4542 final int anotherHandleOffset = 4543 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4544 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4545 int initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4546 4547 if (isStartHandle() && initialOffset >= anotherHandleOffset 4548 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4549 // Handles have crossed, bound it to the first selected line and 4550 // adjust by word / char as normal. 4551 currLine = layout.getLineForOffset(anotherHandleOffset); 4552 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4553 } 4554 4555 int offset = initialOffset; 4556 final int wordEnd = getWordEnd(offset); 4557 final int wordStart = getWordStart(offset); 4558 4559 if (mPrevX == UNSET_X_VALUE) { 4560 mPrevX = x; 4561 } 4562 4563 final int currentOffset = getCurrentCursorOffset(); 4564 final boolean rtlAtCurrentOffset = layout.isRtlCharAt(currentOffset); 4565 final boolean atRtl = layout.isRtlCharAt(offset); 4566 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4567 4568 // We can't determine if the user is expanding or shrinking the selection if they're 4569 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4570 // the cursor at the current position. 4571 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4572 // We're on a boundary or this is the first direction change -- just update 4573 // to the current position. 4574 mLanguageDirectionChanged = true; 4575 mTouchWordDelta = 0.0f; 4576 positionAndAdjustForCrossingHandles(offset); 4577 return; 4578 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4579 // We've just moved past the boundary so update the position. After this we can 4580 // figure out if the user is expanding or shrinking to go by word or character. 4581 positionAndAdjustForCrossingHandles(offset); 4582 mTouchWordDelta = 0.0f; 4583 mLanguageDirectionChanged = false; 4584 return; 4585 } 4586 4587 boolean isExpanding; 4588 final float xDiff = x - mPrevX; 4589 if (isStartHandle()) { 4590 isExpanding = currLine < mPreviousLineTouched; 4591 } else { 4592 isExpanding = currLine > mPreviousLineTouched; 4593 } 4594 if (atRtl == isStartHandle()) { 4595 isExpanding |= xDiff > 0; 4596 } else { 4597 isExpanding |= xDiff < 0; 4598 } 4599 4600 if (mTextView.getHorizontallyScrolling()) { 4601 if (positionNearEdgeOfScrollingView(x, atRtl) 4602 && ((isStartHandle() && mTextView.getScrollX() != 0) 4603 || (!isStartHandle() 4604 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4605 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4606 || (!isStartHandle() && offset > currentOffset))) 4607 || !isExpanding)) { 4608 // If we're expanding ensure that the offset is actually expanding compared to 4609 // the current offset, if the handle snapped to the word, the finger position 4610 // may be out of sync and we don't want the selection to jump back. 4611 mTouchWordDelta = 0.0f; 4612 final int nextOffset = (atRtl == isStartHandle()) 4613 ? layout.getOffsetToRightOf(mPreviousOffset) 4614 : layout.getOffsetToLeftOf(mPreviousOffset); 4615 positionAndAdjustForCrossingHandles(nextOffset); 4616 return; 4617 } 4618 } 4619 4620 if (isExpanding) { 4621 // User is increasing the selection. 4622 final boolean snapToWord = !mInWord 4623 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine); 4624 if (snapToWord) { 4625 // Sometimes words can be broken across lines (Chinese, hyphenation). 4626 // We still snap to the word boundary but we only use the letters on the 4627 // current line to determine if the user is far enough into the word to snap. 4628 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4629 if (layout != null && layout.getLineForOffset(wordBoundary) != currLine) { 4630 wordBoundary = isStartHandle() ? 4631 layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4632 } 4633 final int offsetThresholdToSnap = isStartHandle() 4634 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4635 : wordStart + ((wordBoundary - wordStart) / 2); 4636 if (isStartHandle() 4637 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4638 // User is far enough into the word or on a different line so we expand by 4639 // word. 4640 offset = wordStart; 4641 } else if (!isStartHandle() 4642 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4643 // User is far enough into the word or on a different line so we expand by 4644 // word. 4645 offset = wordEnd; 4646 } else { 4647 offset = mPreviousOffset; 4648 } 4649 } 4650 if (layout != null && (isStartHandle() && offset < initialOffset) 4651 || (!isStartHandle() && offset > initialOffset)) { 4652 final float adjustedX = layout.getPrimaryHorizontal(offset); 4653 mTouchWordDelta = 4654 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4655 } else { 4656 mTouchWordDelta = 0.0f; 4657 } 4658 positionCursor = true; 4659 } else { 4660 final int adjustedOffset = 4661 mTextView.getOffsetAtCoordinate(currLine, x - mTouchWordDelta); 4662 final boolean shrinking = isStartHandle() 4663 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4664 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4665 if (shrinking) { 4666 // User is shrinking the selection. 4667 if (currLine != mPrevLine) { 4668 // We're on a different line, so we'll snap to word boundaries. 4669 offset = isStartHandle() ? wordStart : wordEnd; 4670 if (layout != null && (isStartHandle() && offset < initialOffset) 4671 || (!isStartHandle() && offset > initialOffset)) { 4672 final float adjustedX = layout.getPrimaryHorizontal(offset); 4673 mTouchWordDelta = 4674 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4675 } else { 4676 mTouchWordDelta = 0.0f; 4677 } 4678 } else { 4679 offset = adjustedOffset; 4680 } 4681 positionCursor = true; 4682 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4683 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4684 // Handle has jumped to the word boundary, and the user is moving 4685 // their finger towards the handle, the delta should be updated. 4686 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) - 4687 layout.getPrimaryHorizontal(mPreviousOffset); 4688 } 4689 } 4690 4691 if (positionCursor) { 4692 mPreviousLineTouched = currLine; 4693 positionAndAdjustForCrossingHandles(offset); 4694 } 4695 mPrevX = x; 4696 } 4697 4698 /** 4699 * @param offset Cursor offset. Must be in [-1, length]. 4700 * @param parentScrolled If the parent has been scrolled or not. 4701 */ 4702 @Override 4703 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4704 super.positionAtCursorOffset(offset, parentScrolled); 4705 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4706 } 4707 4708 @Override 4709 public boolean onTouchEvent(MotionEvent event) { 4710 boolean superResult = super.onTouchEvent(event); 4711 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4712 // Reset the touch word offset and x value when the user 4713 // re-engages the handle. 4714 mTouchWordDelta = 0.0f; 4715 mPrevX = UNSET_X_VALUE; 4716 } 4717 return superResult; 4718 } 4719 4720 private void positionAndAdjustForCrossingHandles(int offset) { 4721 final int anotherHandleOffset = 4722 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4723 if ((isStartHandle() && offset >= anotherHandleOffset) 4724 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4725 // Handles can not cross and selection is at least one character. 4726 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 4727 mTouchWordDelta = 0.0f; 4728 } 4729 positionAtCursorOffset(offset, false); 4730 } 4731 4732 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 4733 mTextView.getLocationOnScreen(mTextViewLocation); 4734 boolean nearEdge; 4735 if (atRtl == isStartHandle()) { 4736 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 4737 - mTextView.getPaddingRight(); 4738 nearEdge = x > rightEdge - mTextViewEdgeSlop; 4739 } else { 4740 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 4741 nearEdge = x < leftEdge + mTextViewEdgeSlop; 4742 } 4743 return nearEdge; 4744 } 4745 } 4746 4747 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 4748 final int trueLine = mTextView.getLineAtCoordinate(y); 4749 if (layout == null || prevLine > layout.getLineCount() 4750 || layout.getLineCount() <= 0 || prevLine < 0) { 4751 // Invalid parameters, just return whatever line is at y. 4752 return trueLine; 4753 } 4754 4755 if (Math.abs(trueLine - prevLine) >= 2) { 4756 // Only stick to lines if we're within a line of the previous selection. 4757 return trueLine; 4758 } 4759 4760 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 4761 final int lineCount = layout.getLineCount(); 4762 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 4763 4764 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 4765 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 4766 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 4767 4768 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 4769 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 4770 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 4771 4772 // Determine if we've moved lines based on y position and previous line. 4773 int currLine; 4774 if (y <= yTopBound) { 4775 currLine = Math.max(prevLine - 1, 0); 4776 } else if (y >= yBottomBound) { 4777 currLine = Math.min(prevLine + 1, lineCount - 1); 4778 } else { 4779 currLine = prevLine; 4780 } 4781 return currLine; 4782 } 4783 4784 /** 4785 * A CursorController instance can be used to control a cursor in the text. 4786 */ 4787 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4788 /** 4789 * Makes the cursor controller visible on screen. 4790 * See also {@link #hide()}. 4791 */ 4792 public void show(); 4793 4794 /** 4795 * Hide the cursor controller from screen. 4796 * See also {@link #show()}. 4797 */ 4798 public void hide(); 4799 4800 /** 4801 * Called when the view is detached from window. Perform house keeping task, such as 4802 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4803 * preventing the activity from being recycled. 4804 */ 4805 public void onDetached(); 4806 } 4807 4808 private class InsertionPointCursorController implements CursorController { 4809 private InsertionHandleView mHandle; 4810 4811 public void show() { 4812 getHandle().show(); 4813 4814 if (mSelectionModifierCursorController != null) { 4815 mSelectionModifierCursorController.hide(); 4816 } 4817 } 4818 4819 public void hide() { 4820 if (mHandle != null) { 4821 mHandle.hide(); 4822 } 4823 } 4824 4825 public void onTouchModeChanged(boolean isInTouchMode) { 4826 if (!isInTouchMode) { 4827 hide(); 4828 } 4829 } 4830 4831 private InsertionHandleView getHandle() { 4832 if (mSelectHandleCenter == null) { 4833 mSelectHandleCenter = mTextView.getContext().getDrawable( 4834 mTextView.mTextSelectHandleRes); 4835 } 4836 if (mHandle == null) { 4837 mHandle = new InsertionHandleView(mSelectHandleCenter); 4838 } 4839 return mHandle; 4840 } 4841 4842 @Override 4843 public void onDetached() { 4844 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4845 observer.removeOnTouchModeChangeListener(this); 4846 4847 if (mHandle != null) mHandle.onDetached(); 4848 } 4849 } 4850 4851 class SelectionModifierCursorController implements CursorController { 4852 // The cursor controller handles, lazily created when shown. 4853 private SelectionHandleView mStartHandle; 4854 private SelectionHandleView mEndHandle; 4855 // The offsets of that last touch down event. Remembered to start selection there. 4856 private int mMinTouchOffset, mMaxTouchOffset; 4857 4858 private float mDownPositionX, mDownPositionY; 4859 private boolean mGestureStayedInTapRegion; 4860 4861 // Where the user first starts the drag motion. 4862 private int mStartOffset = -1; 4863 4864 private boolean mHaventMovedEnoughToStartDrag; 4865 // The line that a selection happened most recently with the drag accelerator. 4866 private int mLineSelectionIsOn = -1; 4867 // Whether the drag accelerator has selected past the initial line. 4868 private boolean mSwitchedLines = false; 4869 4870 // Indicates the drag accelerator mode that the user is currently using. 4871 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 4872 // Drag accelerator is inactive. 4873 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 4874 // Character based selection by dragging. Only for mouse. 4875 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 4876 // Word based selection by dragging. Enabled after long pressing or double tapping. 4877 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 4878 // Paragraph based selection by dragging. Enabled after mouse triple click. 4879 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 4880 4881 SelectionModifierCursorController() { 4882 resetTouchOffsets(); 4883 } 4884 4885 public void show() { 4886 if (mTextView.isInBatchEditMode()) { 4887 return; 4888 } 4889 initDrawables(); 4890 initHandles(); 4891 } 4892 4893 private void initDrawables() { 4894 if (mSelectHandleLeft == null) { 4895 mSelectHandleLeft = mTextView.getContext().getDrawable( 4896 mTextView.mTextSelectHandleLeftRes); 4897 } 4898 if (mSelectHandleRight == null) { 4899 mSelectHandleRight = mTextView.getContext().getDrawable( 4900 mTextView.mTextSelectHandleRightRes); 4901 } 4902 } 4903 4904 private void initHandles() { 4905 // Lazy object creation has to be done before updatePosition() is called. 4906 if (mStartHandle == null) { 4907 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 4908 com.android.internal.R.id.selection_start_handle, 4909 HANDLE_TYPE_SELECTION_START); 4910 } 4911 if (mEndHandle == null) { 4912 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 4913 com.android.internal.R.id.selection_end_handle, 4914 HANDLE_TYPE_SELECTION_END); 4915 } 4916 4917 mStartHandle.show(); 4918 mEndHandle.show(); 4919 4920 hideInsertionPointCursorController(); 4921 } 4922 4923 public void hide() { 4924 if (mStartHandle != null) mStartHandle.hide(); 4925 if (mEndHandle != null) mEndHandle.hide(); 4926 } 4927 4928 public void enterDrag(int dragAcceleratorMode) { 4929 // Just need to init the handles / hide insertion cursor. 4930 show(); 4931 mDragAcceleratorMode = dragAcceleratorMode; 4932 // Start location of selection. 4933 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4934 mLastDownPositionY); 4935 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 4936 // Don't show the handles until user has lifted finger. 4937 hide(); 4938 4939 // This stops scrolling parents from intercepting the touch event, allowing 4940 // the user to continue dragging across the screen to select text; TextView will 4941 // scroll as necessary. 4942 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4943 mTextView.cancelLongPress(); 4944 } 4945 4946 public void onTouchEvent(MotionEvent event) { 4947 // This is done even when the View does not have focus, so that long presses can start 4948 // selection and tap can move cursor from this tap position. 4949 final float eventX = event.getX(); 4950 final float eventY = event.getY(); 4951 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 4952 switch (event.getActionMasked()) { 4953 case MotionEvent.ACTION_DOWN: 4954 if (extractedTextModeWillBeStarted()) { 4955 // Prevent duplicating the selection handles until the mode starts. 4956 hide(); 4957 } else { 4958 // Remember finger down position, to be able to start selection from there. 4959 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 4960 eventX, eventY); 4961 4962 // Double tap detection 4963 if (mGestureStayedInTapRegion) { 4964 if (mTapState == TAP_STATE_DOUBLE_TAP 4965 || mTapState == TAP_STATE_TRIPLE_CLICK) { 4966 final float deltaX = eventX - mDownPositionX; 4967 final float deltaY = eventY - mDownPositionY; 4968 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4969 4970 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4971 mTextView.getContext()); 4972 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4973 boolean stayedInArea = 4974 distanceSquared < doubleTapSlop * doubleTapSlop; 4975 4976 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 4977 if (mTapState == TAP_STATE_DOUBLE_TAP) { 4978 selectCurrentWordAndStartDrag(); 4979 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 4980 selectCurrentParagraphAndStartDrag(); 4981 } 4982 mDiscardNextActionUp = true; 4983 } 4984 } 4985 } 4986 4987 mDownPositionX = eventX; 4988 mDownPositionY = eventY; 4989 mGestureStayedInTapRegion = true; 4990 mHaventMovedEnoughToStartDrag = true; 4991 } 4992 break; 4993 4994 case MotionEvent.ACTION_POINTER_DOWN: 4995 case MotionEvent.ACTION_POINTER_UP: 4996 // Handle multi-point gestures. Keep min and max offset positions. 4997 // Only activated for devices that correctly handle multi-touch. 4998 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4999 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5000 updateMinAndMaxOffsets(event); 5001 } 5002 break; 5003 5004 case MotionEvent.ACTION_MOVE: 5005 final ViewConfiguration viewConfig = ViewConfiguration.get( 5006 mTextView.getContext()); 5007 final int touchSlop = viewConfig.getScaledTouchSlop(); 5008 5009 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5010 final float deltaX = eventX - mDownPositionX; 5011 final float deltaY = eventY - mDownPositionY; 5012 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5013 5014 if (mGestureStayedInTapRegion) { 5015 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5016 mGestureStayedInTapRegion = 5017 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5018 } 5019 if (mHaventMovedEnoughToStartDrag) { 5020 // We don't start dragging until the user has moved enough. 5021 mHaventMovedEnoughToStartDrag = 5022 distanceSquared <= touchSlop * touchSlop; 5023 } 5024 } 5025 5026 if (isMouse && !isDragAcceleratorActive()) { 5027 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5028 if (mTextView.hasSelection() 5029 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5030 && offset >= mTextView.getSelectionStart() 5031 && offset <= mTextView.getSelectionEnd()) { 5032 startDragAndDrop(); 5033 break; 5034 } 5035 5036 if (mStartOffset != offset) { 5037 // Start character based drag accelerator. 5038 if (mTextActionMode != null) { 5039 mTextActionMode.finish(); 5040 } 5041 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5042 mDiscardNextActionUp = true; 5043 mHaventMovedEnoughToStartDrag = false; 5044 } 5045 } 5046 5047 if (mStartHandle != null && mStartHandle.isShowing()) { 5048 // Don't do the drag if the handles are showing already. 5049 break; 5050 } 5051 5052 updateSelection(event); 5053 break; 5054 5055 case MotionEvent.ACTION_UP: 5056 if (!isDragAcceleratorActive()) { 5057 break; 5058 } 5059 updateSelection(event); 5060 5061 // No longer dragging to select text, let the parent intercept events. 5062 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5063 5064 int startOffset = mTextView.getSelectionStart(); 5065 int endOffset = mTextView.getSelectionEnd(); 5066 5067 // Since we don't let drag handles pass once they're visible, we need to 5068 // make sure the start / end locations are correct because the user *can* 5069 // switch directions during the initial drag. 5070 if (endOffset < startOffset) { 5071 int tmp = endOffset; 5072 endOffset = startOffset; 5073 startOffset = tmp; 5074 5075 // Also update the selection with the right offsets in this case. 5076 Selection.setSelection((Spannable) mTextView.getText(), 5077 startOffset, endOffset); 5078 } 5079 if (startOffset != endOffset) { 5080 startSelectionActionMode(); 5081 } 5082 5083 // No longer the first dragging motion, reset. 5084 resetDragAcceleratorState(); 5085 break; 5086 } 5087 } 5088 5089 private void updateSelection(MotionEvent event) { 5090 if (mTextView.getLayout() != null) { 5091 switch (mDragAcceleratorMode) { 5092 case DRAG_ACCELERATOR_MODE_CHARACTER: 5093 updateCharacterBasedSelection(event); 5094 break; 5095 case DRAG_ACCELERATOR_MODE_WORD: 5096 updateWordBasedSelection(event); 5097 break; 5098 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5099 updateParagraphBasedSelection(event); 5100 break; 5101 } 5102 } 5103 } 5104 5105 /** 5106 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5107 * 5108 * @return true if the drag was started. 5109 */ 5110 private boolean selectCurrentParagraphAndStartDrag() { 5111 if (mInsertionActionModeRunnable != null) { 5112 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5113 } 5114 if (mTextActionMode != null) { 5115 mTextActionMode.finish(); 5116 } 5117 if (!selectCurrentParagraph()) { 5118 return false; 5119 } 5120 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5121 return true; 5122 } 5123 5124 private void updateCharacterBasedSelection(MotionEvent event) { 5125 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5126 Selection.setSelection((Spannable) mTextView.getText(), mStartOffset, offset); 5127 } 5128 5129 private void updateWordBasedSelection(MotionEvent event) { 5130 if (mHaventMovedEnoughToStartDrag) { 5131 return; 5132 } 5133 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5134 final ViewConfiguration viewConfig = ViewConfiguration.get( 5135 mTextView.getContext()); 5136 final float eventX = event.getX(); 5137 final float eventY = event.getY(); 5138 final int currLine; 5139 if (isMouse) { 5140 // No need to offset the y coordinate for mouse input. 5141 currLine = mTextView.getLineAtCoordinate(eventY); 5142 } else { 5143 float y = eventY; 5144 if (mSwitchedLines) { 5145 // Offset the finger by the same vertical offset as the handles. 5146 // This improves visibility of the content being selected by 5147 // shifting the finger below the content, this is applied once 5148 // the user has switched lines. 5149 final int touchSlop = viewConfig.getScaledTouchSlop(); 5150 final float fingerOffset = (mStartHandle != null) 5151 ? mStartHandle.getIdealVerticalOffset() 5152 : touchSlop; 5153 y = eventY - fingerOffset; 5154 } 5155 5156 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5157 y); 5158 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5159 // Break early here, we want to offset the finger position from 5160 // the selection highlight, once the user moved their finger 5161 // to a different line we should apply the offset and *not* switch 5162 // lines until recomputing the position with the finger offset. 5163 mSwitchedLines = true; 5164 return; 5165 } 5166 } 5167 5168 int startOffset; 5169 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5170 // Snap to word boundaries. 5171 if (mStartOffset < offset) { 5172 // Expanding with end handle. 5173 offset = getWordEnd(offset); 5174 startOffset = getWordStart(mStartOffset); 5175 } else { 5176 // Expanding with start handle. 5177 offset = getWordStart(offset); 5178 startOffset = getWordEnd(mStartOffset); 5179 } 5180 mLineSelectionIsOn = currLine; 5181 Selection.setSelection((Spannable) mTextView.getText(), 5182 startOffset, offset); 5183 } 5184 5185 private void updateParagraphBasedSelection(MotionEvent event) { 5186 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5187 5188 final int start = Math.min(offset, mStartOffset); 5189 final int end = Math.max(offset, mStartOffset); 5190 final long paragraphsRange = getParagraphsRange(start, end); 5191 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5192 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5193 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5194 } 5195 5196 /** 5197 * @param event 5198 */ 5199 private void updateMinAndMaxOffsets(MotionEvent event) { 5200 int pointerCount = event.getPointerCount(); 5201 for (int index = 0; index < pointerCount; index++) { 5202 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5203 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5204 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5205 } 5206 } 5207 5208 public int getMinTouchOffset() { 5209 return mMinTouchOffset; 5210 } 5211 5212 public int getMaxTouchOffset() { 5213 return mMaxTouchOffset; 5214 } 5215 5216 public void resetTouchOffsets() { 5217 mMinTouchOffset = mMaxTouchOffset = -1; 5218 resetDragAcceleratorState(); 5219 } 5220 5221 private void resetDragAcceleratorState() { 5222 mStartOffset = -1; 5223 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5224 mSwitchedLines = false; 5225 } 5226 5227 /** 5228 * @return true iff this controller is currently used to move the selection start. 5229 */ 5230 public boolean isSelectionStartDragged() { 5231 return mStartHandle != null && mStartHandle.isDragging(); 5232 } 5233 5234 /** 5235 * @return true if the user is selecting text using the drag accelerator. 5236 */ 5237 public boolean isDragAcceleratorActive() { 5238 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 5239 } 5240 5241 public void onTouchModeChanged(boolean isInTouchMode) { 5242 if (!isInTouchMode) { 5243 hide(); 5244 } 5245 } 5246 5247 @Override 5248 public void onDetached() { 5249 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5250 observer.removeOnTouchModeChangeListener(this); 5251 5252 if (mStartHandle != null) mStartHandle.onDetached(); 5253 if (mEndHandle != null) mEndHandle.onDetached(); 5254 } 5255 } 5256 5257 private class CorrectionHighlighter { 5258 private final Path mPath = new Path(); 5259 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 5260 private int mStart, mEnd; 5261 private long mFadingStartTime; 5262 private RectF mTempRectF; 5263 private final static int FADE_OUT_DURATION = 400; 5264 5265 public CorrectionHighlighter() { 5266 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 5267 applicationScale); 5268 mPaint.setStyle(Paint.Style.FILL); 5269 } 5270 5271 public void highlight(CorrectionInfo info) { 5272 mStart = info.getOffset(); 5273 mEnd = mStart + info.getNewText().length(); 5274 mFadingStartTime = SystemClock.uptimeMillis(); 5275 5276 if (mStart < 0 || mEnd < 0) { 5277 stopAnimation(); 5278 } 5279 } 5280 5281 public void draw(Canvas canvas, int cursorOffsetVertical) { 5282 if (updatePath() && updatePaint()) { 5283 if (cursorOffsetVertical != 0) { 5284 canvas.translate(0, cursorOffsetVertical); 5285 } 5286 5287 canvas.drawPath(mPath, mPaint); 5288 5289 if (cursorOffsetVertical != 0) { 5290 canvas.translate(0, -cursorOffsetVertical); 5291 } 5292 invalidate(true); // TODO invalidate cursor region only 5293 } else { 5294 stopAnimation(); 5295 invalidate(false); // TODO invalidate cursor region only 5296 } 5297 } 5298 5299 private boolean updatePaint() { 5300 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5301 if (duration > FADE_OUT_DURATION) return false; 5302 5303 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5304 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5305 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 5306 ((int) (highlightColorAlpha * coef) << 24); 5307 mPaint.setColor(color); 5308 return true; 5309 } 5310 5311 private boolean updatePath() { 5312 final Layout layout = mTextView.getLayout(); 5313 if (layout == null) return false; 5314 5315 // Update in case text is edited while the animation is run 5316 final int length = mTextView.getText().length(); 5317 int start = Math.min(length, mStart); 5318 int end = Math.min(length, mEnd); 5319 5320 mPath.reset(); 5321 layout.getSelectionPath(start, end, mPath); 5322 return true; 5323 } 5324 5325 private void invalidate(boolean delayed) { 5326 if (mTextView.getLayout() == null) return; 5327 5328 if (mTempRectF == null) mTempRectF = new RectF(); 5329 mPath.computeBounds(mTempRectF, false); 5330 5331 int left = mTextView.getCompoundPaddingLeft(); 5332 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5333 5334 if (delayed) { 5335 mTextView.postInvalidateOnAnimation( 5336 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5337 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5338 } else { 5339 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5340 (int) mTempRectF.right, (int) mTempRectF.bottom); 5341 } 5342 } 5343 5344 private void stopAnimation() { 5345 Editor.this.mCorrectionHighlighter = null; 5346 } 5347 } 5348 5349 private static class ErrorPopup extends PopupWindow { 5350 private boolean mAbove = false; 5351 private final TextView mView; 5352 private int mPopupInlineErrorBackgroundId = 0; 5353 private int mPopupInlineErrorAboveBackgroundId = 0; 5354 5355 ErrorPopup(TextView v, int width, int height) { 5356 super(v, width, height); 5357 mView = v; 5358 // Make sure the TextView has a background set as it will be used the first time it is 5359 // shown and positioned. Initialized with below background, which should have 5360 // dimensions identical to the above version for this to work (and is more likely). 5361 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5362 com.android.internal.R.styleable.Theme_errorMessageBackground); 5363 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5364 } 5365 5366 void fixDirection(boolean above) { 5367 mAbove = above; 5368 5369 if (above) { 5370 mPopupInlineErrorAboveBackgroundId = 5371 getResourceId(mPopupInlineErrorAboveBackgroundId, 5372 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5373 } else { 5374 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5375 com.android.internal.R.styleable.Theme_errorMessageBackground); 5376 } 5377 5378 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 5379 mPopupInlineErrorBackgroundId); 5380 } 5381 5382 private int getResourceId(int currentId, int index) { 5383 if (currentId == 0) { 5384 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5385 R.styleable.Theme); 5386 currentId = styledAttributes.getResourceId(index, 0); 5387 styledAttributes.recycle(); 5388 } 5389 return currentId; 5390 } 5391 5392 @Override 5393 public void update(int x, int y, int w, int h, boolean force) { 5394 super.update(x, y, w, h, force); 5395 5396 boolean above = isAboveAnchor(); 5397 if (above != mAbove) { 5398 fixDirection(above); 5399 } 5400 } 5401 } 5402 5403 static class InputContentType { 5404 int imeOptions = EditorInfo.IME_NULL; 5405 String privateImeOptions; 5406 CharSequence imeActionLabel; 5407 int imeActionId; 5408 Bundle extras; 5409 OnEditorActionListener onEditorActionListener; 5410 boolean enterDown; 5411 LocaleList imeHintLocales; 5412 } 5413 5414 static class InputMethodState { 5415 ExtractedTextRequest mExtractedTextRequest; 5416 final ExtractedText mExtractedText = new ExtractedText(); 5417 int mBatchEditNesting; 5418 boolean mCursorChanged; 5419 boolean mSelectionModeChanged; 5420 boolean mContentChanged; 5421 int mChangedStart, mChangedEnd, mChangedDelta; 5422 } 5423 5424 /** 5425 * @return True iff (start, end) is a valid range within the text. 5426 */ 5427 private static boolean isValidRange(CharSequence text, int start, int end) { 5428 return 0 <= start && start <= end && end <= text.length(); 5429 } 5430 5431 @VisibleForTesting 5432 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5433 return mSuggestionsPopupWindow; 5434 } 5435 5436 /** 5437 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5438 * text being typed (and hence always returns null from the filter() method). 5439 */ 5440 public static class UndoInputFilter implements InputFilter { 5441 private final Editor mEditor; 5442 5443 // Whether the current filter pass is directly caused by an end-user text edit. 5444 private boolean mIsUserEdit; 5445 5446 // Whether the text field is handling an IME composition. Must be parceled in case the user 5447 // rotates the screen during composition. 5448 private boolean mHasComposition; 5449 5450 public UndoInputFilter(Editor editor) { 5451 mEditor = editor; 5452 } 5453 5454 public void saveInstanceState(Parcel parcel) { 5455 parcel.writeInt(mIsUserEdit ? 1 : 0); 5456 parcel.writeInt(mHasComposition ? 1 : 0); 5457 } 5458 5459 public void restoreInstanceState(Parcel parcel) { 5460 mIsUserEdit = parcel.readInt() != 0; 5461 mHasComposition = parcel.readInt() != 0; 5462 } 5463 5464 /** 5465 * Signals that a user-triggered edit is starting. 5466 */ 5467 public void beginBatchEdit() { 5468 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5469 mIsUserEdit = true; 5470 } 5471 5472 public void endBatchEdit() { 5473 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5474 mIsUserEdit = false; 5475 } 5476 5477 @Override 5478 public CharSequence filter(CharSequence source, int start, int end, 5479 Spanned dest, int dstart, int dend) { 5480 if (DEBUG_UNDO) { 5481 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 5482 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5483 } 5484 5485 // Check to see if this edit should be tracked for undo. 5486 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5487 return null; 5488 } 5489 5490 // Check for and handle IME composition edits. 5491 if (handleCompositionEdit(source, start, end, dstart)) { 5492 return null; 5493 } 5494 5495 // Handle keyboard edits. 5496 handleKeyboardEdit(source, start, end, dest, dstart, dend); 5497 return null; 5498 } 5499 5500 /** 5501 * Returns true iff the edit was handled, either because it should be ignored or because 5502 * this function created an undo operation for it. 5503 */ 5504 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 5505 // Ignore edits while the user is composing. 5506 if (isComposition(source)) { 5507 mHasComposition = true; 5508 return true; 5509 } 5510 final boolean hadComposition = mHasComposition; 5511 mHasComposition = false; 5512 5513 // Check for the transition out of the composing state. 5514 if (hadComposition) { 5515 // If there was no text the user canceled composition. Ignore the edit. 5516 if (start == end) { 5517 return true; 5518 } 5519 5520 // Otherwise the user inserted the composition. 5521 String newText = TextUtils.substring(source, start, end); 5522 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 5523 recordEdit(edit, false /* forceMerge */); 5524 return true; 5525 } 5526 5527 // This was neither a composition event nor a transition out of composing. 5528 return false; 5529 } 5530 5531 private void handleKeyboardEdit(CharSequence source, int start, int end, 5532 Spanned dest, int dstart, int dend) { 5533 // An application may install a TextWatcher to provide additional modifications after 5534 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5535 // string). This results in multiple filter() calls for what the user considers to be 5536 // a single operation. Always undo the whole set of changes in one step. 5537 final boolean forceMerge = isInTextWatcher(); 5538 5539 // Build a new operation with all the information from this edit. 5540 String newText = TextUtils.substring(source, start, end); 5541 String oldText = TextUtils.substring(dest, dstart, dend); 5542 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 5543 recordEdit(edit, forceMerge); 5544 } 5545 5546 /** 5547 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5548 * If forceMerge is true then the new edit is always merged. 5549 */ 5550 private void recordEdit(EditOperation edit, boolean forceMerge) { 5551 // Fetch the last edit operation and attempt to merge in the new edit. 5552 final UndoManager um = mEditor.mUndoManager; 5553 um.beginUpdate("Edit text"); 5554 EditOperation lastEdit = um.getLastOperation( 5555 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5556 if (lastEdit == null) { 5557 // Add this as the first edit. 5558 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5559 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5560 } else if (forceMerge) { 5561 // Forced merges take priority because they could be the result of a non-user-edit 5562 // change and this case should not create a new undo operation. 5563 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5564 lastEdit.forceMergeWith(edit); 5565 } else if (!mIsUserEdit) { 5566 // An application directly modified the Editable outside of a text edit. Treat this 5567 // as a new change and don't attempt to merge. 5568 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5569 um.commitState(mEditor.mUndoOwner); 5570 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5571 } else if (lastEdit.mergeWith(edit)) { 5572 // Merge succeeded, nothing else to do. 5573 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5574 } else { 5575 // Could not merge with the last edit, so commit the last edit and add this edit. 5576 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5577 um.commitState(mEditor.mUndoOwner); 5578 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5579 } 5580 um.endUpdate(); 5581 } 5582 5583 private boolean canUndoEdit(CharSequence source, int start, int end, 5584 Spanned dest, int dstart, int dend) { 5585 if (!mEditor.mAllowUndo) { 5586 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5587 return false; 5588 } 5589 5590 if (mEditor.mUndoManager.isInUndo()) { 5591 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5592 return false; 5593 } 5594 5595 // Text filters run before input operations are applied. However, some input operations 5596 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5597 // attempt to undo invalid operations. 5598 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5599 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5600 return false; 5601 } 5602 5603 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5604 // on an input field. Skip no-op changes. 5605 if (start == end && dstart == dend) { 5606 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5607 return false; 5608 } 5609 5610 return true; 5611 } 5612 5613 private boolean isComposition(CharSequence source) { 5614 if (!(source instanceof Spannable)) { 5615 return false; 5616 } 5617 // This is a composition edit if the source has a non-zero-length composing span. 5618 Spannable text = (Spannable) source; 5619 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 5620 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 5621 return composeBegin < composeEnd; 5622 } 5623 5624 private boolean isInTextWatcher() { 5625 CharSequence text = mEditor.mTextView.getText(); 5626 return (text instanceof SpannableStringBuilder) 5627 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 5628 } 5629 } 5630 5631 /** 5632 * An operation to undo a single "edit" to a text view. 5633 */ 5634 public static class EditOperation extends UndoOperation<Editor> { 5635 private static final int TYPE_INSERT = 0; 5636 private static final int TYPE_DELETE = 1; 5637 private static final int TYPE_REPLACE = 2; 5638 5639 private int mType; 5640 private String mOldText; 5641 private int mOldTextStart; 5642 private String mNewText; 5643 private int mNewTextStart; 5644 5645 private int mOldCursorPos; 5646 private int mNewCursorPos; 5647 5648 /** 5649 * Constructs an edit operation from a text input operation on editor that replaces the 5650 * oldText starting at dstart with newText. 5651 */ 5652 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 5653 super(editor.mUndoOwner); 5654 mOldText = oldText; 5655 mNewText = newText; 5656 5657 // Determine the type of the edit and store where it occurred. Avoid storing 5658 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 5659 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 5660 // outside the bounds of the final text). 5661 if (mNewText.length() > 0 && mOldText.length() == 0) { 5662 mType = TYPE_INSERT; 5663 mNewTextStart = dstart; 5664 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 5665 mType = TYPE_DELETE; 5666 mOldTextStart = dstart; 5667 } else { 5668 mType = TYPE_REPLACE; 5669 mOldTextStart = mNewTextStart = dstart; 5670 } 5671 5672 // Store cursor data. 5673 mOldCursorPos = editor.mTextView.getSelectionStart(); 5674 mNewCursorPos = dstart + mNewText.length(); 5675 } 5676 5677 public EditOperation(Parcel src, ClassLoader loader) { 5678 super(src, loader); 5679 mType = src.readInt(); 5680 mOldText = src.readString(); 5681 mOldTextStart = src.readInt(); 5682 mNewText = src.readString(); 5683 mNewTextStart = src.readInt(); 5684 mOldCursorPos = src.readInt(); 5685 mNewCursorPos = src.readInt(); 5686 } 5687 5688 @Override 5689 public void writeToParcel(Parcel dest, int flags) { 5690 dest.writeInt(mType); 5691 dest.writeString(mOldText); 5692 dest.writeInt(mOldTextStart); 5693 dest.writeString(mNewText); 5694 dest.writeInt(mNewTextStart); 5695 dest.writeInt(mOldCursorPos); 5696 dest.writeInt(mNewCursorPos); 5697 } 5698 5699 private int getNewTextEnd() { 5700 return mNewTextStart + mNewText.length(); 5701 } 5702 5703 private int getOldTextEnd() { 5704 return mOldTextStart + mOldText.length(); 5705 } 5706 5707 @Override 5708 public void commit() { 5709 } 5710 5711 @Override 5712 public void undo() { 5713 if (DEBUG_UNDO) Log.d(TAG, "undo"); 5714 // Remove the new text and insert the old. 5715 Editor editor = getOwnerData(); 5716 Editable text = (Editable) editor.mTextView.getText(); 5717 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5718 mOldCursorPos); 5719 } 5720 5721 @Override 5722 public void redo() { 5723 if (DEBUG_UNDO) Log.d(TAG, "redo"); 5724 // Remove the old text and insert the new. 5725 Editor editor = getOwnerData(); 5726 Editable text = (Editable) editor.mTextView.getText(); 5727 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 5728 mNewCursorPos); 5729 } 5730 5731 /** 5732 * Attempts to merge this existing operation with a new edit. 5733 * @param edit The new edit operation. 5734 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 5735 * object unchanged. 5736 */ 5737 private boolean mergeWith(EditOperation edit) { 5738 if (DEBUG_UNDO) { 5739 Log.d(TAG, "mergeWith old " + this); 5740 Log.d(TAG, "mergeWith new " + edit); 5741 } 5742 switch (mType) { 5743 case TYPE_INSERT: 5744 return mergeInsertWith(edit); 5745 case TYPE_DELETE: 5746 return mergeDeleteWith(edit); 5747 case TYPE_REPLACE: 5748 return mergeReplaceWith(edit); 5749 default: 5750 return false; 5751 } 5752 } 5753 5754 private boolean mergeInsertWith(EditOperation edit) { 5755 // Only merge continuous insertions. 5756 if (edit.mType != TYPE_INSERT) { 5757 return false; 5758 } 5759 // Only merge insertions that are contiguous. 5760 if (getNewTextEnd() != edit.mNewTextStart) { 5761 return false; 5762 } 5763 mNewText += edit.mNewText; 5764 mNewCursorPos = edit.mNewCursorPos; 5765 return true; 5766 } 5767 5768 // TODO: Support forward delete. 5769 private boolean mergeDeleteWith(EditOperation edit) { 5770 // Only merge continuous deletes. 5771 if (edit.mType != TYPE_DELETE) { 5772 return false; 5773 } 5774 // Only merge deletions that are contiguous. 5775 if (mOldTextStart != edit.getOldTextEnd()) { 5776 return false; 5777 } 5778 mOldTextStart = edit.mOldTextStart; 5779 mOldText = edit.mOldText + mOldText; 5780 mNewCursorPos = edit.mNewCursorPos; 5781 return true; 5782 } 5783 5784 private boolean mergeReplaceWith(EditOperation edit) { 5785 // Replacements can merge only with adjacent inserts. 5786 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5787 return false; 5788 } 5789 mOldText += edit.mOldText; 5790 mNewText += edit.mNewText; 5791 mNewCursorPos = edit.mNewCursorPos; 5792 return true; 5793 } 5794 5795 /** 5796 * Forcibly creates a single merged edit operation by simulating the entire text 5797 * contents being replaced. 5798 */ 5799 public void forceMergeWith(EditOperation edit) { 5800 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5801 Editor editor = getOwnerData(); 5802 5803 // Copy the text of the current field. 5804 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5805 // but would require two parallel implementations of modifyText() because Editable and 5806 // StringBuilder do not share an interface for replace/delete/insert. 5807 Editable editable = (Editable) editor.mTextView.getText(); 5808 Editable originalText = new SpannableStringBuilder(editable.toString()); 5809 5810 // Roll back the last operation. 5811 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5812 mOldCursorPos); 5813 5814 // Clone the text again and apply the new operation. 5815 Editable finalText = new SpannableStringBuilder(editable.toString()); 5816 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5817 edit.mNewTextStart, edit.mNewCursorPos); 5818 5819 // Convert this operation into a non-mergeable replacement of the entire string. 5820 mType = TYPE_REPLACE; 5821 mNewText = finalText.toString(); 5822 mNewTextStart = 0; 5823 mOldText = originalText.toString(); 5824 mOldTextStart = 0; 5825 mNewCursorPos = edit.mNewCursorPos; 5826 // mOldCursorPos is unchanged. 5827 } 5828 5829 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5830 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5831 // Apply the edit if it is still valid. 5832 if (isValidRange(text, deleteFrom, deleteTo) && 5833 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5834 if (deleteFrom != deleteTo) { 5835 text.delete(deleteFrom, deleteTo); 5836 } 5837 if (newText.length() != 0) { 5838 text.insert(newTextInsertAt, newText); 5839 } 5840 } 5841 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5842 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5843 // TODO: Select all the text that was undone. 5844 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5845 Selection.setSelection(text, newCursorPos); 5846 } 5847 } 5848 5849 private String getTypeString() { 5850 switch (mType) { 5851 case TYPE_INSERT: 5852 return "insert"; 5853 case TYPE_DELETE: 5854 return "delete"; 5855 case TYPE_REPLACE: 5856 return "replace"; 5857 default: 5858 return ""; 5859 } 5860 } 5861 5862 @Override 5863 public String toString() { 5864 return "[mType=" + getTypeString() + ", " + 5865 "mOldText=" + mOldText + ", " + 5866 "mOldTextStart=" + mOldTextStart + ", " + 5867 "mNewText=" + mNewText + ", " + 5868 "mNewTextStart=" + mNewTextStart + ", " + 5869 "mOldCursorPos=" + mOldCursorPos + ", " + 5870 "mNewCursorPos=" + mNewCursorPos + "]"; 5871 } 5872 5873 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5874 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5875 @Override 5876 public EditOperation createFromParcel(Parcel in) { 5877 return new EditOperation(in, null); 5878 } 5879 5880 @Override 5881 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5882 return new EditOperation(in, loader); 5883 } 5884 5885 @Override 5886 public EditOperation[] newArray(int size) { 5887 return new EditOperation[size]; 5888 } 5889 }; 5890 } 5891 5892 /** 5893 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 5894 * These allow external applications to plug into currently selected text. 5895 */ 5896 static final class ProcessTextIntentActionsHandler { 5897 5898 private final Editor mEditor; 5899 private final TextView mTextView; 5900 private final PackageManager mPackageManager; 5901 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<Intent>(); 5902 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions 5903 = new SparseArray<AccessibilityNodeInfo.AccessibilityAction>(); 5904 5905 private ProcessTextIntentActionsHandler(Editor editor) { 5906 mEditor = Preconditions.checkNotNull(editor); 5907 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 5908 mPackageManager = Preconditions.checkNotNull( 5909 mTextView.getContext().getPackageManager()); 5910 } 5911 5912 /** 5913 * Adds "PROCESS_TEXT" menu items to the specified menu. 5914 */ 5915 public void onInitializeMenu(Menu menu) { 5916 int i = 0; 5917 for (ResolveInfo resolveInfo : getSupportedActivities()) { 5918 menu.add(Menu.NONE, Menu.NONE, 5919 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 5920 getLabel(resolveInfo)) 5921 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 5922 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 5923 } 5924 } 5925 5926 /** 5927 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 5928 * menu item. 5929 * 5930 * @return True if the action was performed, false otherwise. 5931 */ 5932 public boolean performMenuItemAction(MenuItem item) { 5933 return fireIntent(item.getIntent()); 5934 } 5935 5936 /** 5937 * Initializes and caches "PROCESS_TEXT" accessibility actions. 5938 */ 5939 public void initializeAccessibilityActions() { 5940 mAccessibilityIntents.clear(); 5941 mAccessibilityActions.clear(); 5942 int i = 0; 5943 for (ResolveInfo resolveInfo : getSupportedActivities()) { 5944 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 5945 mAccessibilityActions.put( 5946 actionId, 5947 new AccessibilityNodeInfo.AccessibilityAction( 5948 actionId, getLabel(resolveInfo))); 5949 mAccessibilityIntents.put( 5950 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 5951 } 5952 } 5953 5954 /** 5955 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 5956 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 5957 * latest accessibility actions available for this call. 5958 */ 5959 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 5960 for (int i = 0; i < mAccessibilityActions.size(); i++) { 5961 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 5962 } 5963 } 5964 5965 /** 5966 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 5967 * accessibility action id. 5968 * 5969 * @return True if the action was performed, false otherwise. 5970 */ 5971 public boolean performAccessibilityAction(int actionId) { 5972 return fireIntent(mAccessibilityIntents.get(actionId)); 5973 } 5974 5975 private boolean fireIntent(Intent intent) { 5976 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 5977 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 5978 mEditor.mPreserveDetachedSelection = true; 5979 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 5980 return true; 5981 } 5982 return false; 5983 } 5984 5985 private List<ResolveInfo> getSupportedActivities() { 5986 PackageManager packageManager = mTextView.getContext().getPackageManager(); 5987 return packageManager.queryIntentActivities(createProcessTextIntent(), 0); 5988 } 5989 5990 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 5991 return createProcessTextIntent() 5992 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 5993 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 5994 } 5995 5996 private Intent createProcessTextIntent() { 5997 return new Intent() 5998 .setAction(Intent.ACTION_PROCESS_TEXT) 5999 .setType("text/plain"); 6000 } 6001 6002 private CharSequence getLabel(ResolveInfo resolveInfo) { 6003 return resolveInfo.loadLabel(mPackageManager); 6004 } 6005 } 6006} 6007