Editor.java revision ff375577952dad90bfa28073c67f97db68f106db
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.Drawable; 42import android.os.Bundle; 43import android.os.Parcel; 44import android.os.Parcelable; 45import android.os.ParcelableParcel; 46import android.os.SystemClock; 47import android.provider.Settings; 48import android.text.DynamicLayout; 49import android.text.Editable; 50import android.text.InputFilter; 51import android.text.InputType; 52import android.text.Layout; 53import android.text.ParcelableSpan; 54import android.text.Selection; 55import android.text.SpanWatcher; 56import android.text.Spannable; 57import android.text.SpannableStringBuilder; 58import android.text.Spanned; 59import android.text.StaticLayout; 60import android.text.TextUtils; 61import android.text.method.KeyListener; 62import android.text.method.MetaKeyKeyListener; 63import android.text.method.MovementMethod; 64import android.text.method.WordIterator; 65import android.text.style.EasyEditSpan; 66import android.text.style.SuggestionRangeSpan; 67import android.text.style.SuggestionSpan; 68import android.text.style.TextAppearanceSpan; 69import android.text.style.URLSpan; 70import android.util.DisplayMetrics; 71import android.util.Log; 72import android.util.SparseArray; 73import android.view.ActionMode; 74import android.view.ActionMode.Callback; 75import android.view.DisplayListCanvas; 76import android.view.DragEvent; 77import android.view.Gravity; 78import android.view.InputDevice; 79import android.view.LayoutInflater; 80import android.view.Menu; 81import android.view.MenuItem; 82import android.view.MotionEvent; 83import android.view.RenderNode; 84import android.view.View; 85import android.view.View.DragShadowBuilder; 86import android.view.View.OnClickListener; 87import android.view.ViewConfiguration; 88import android.view.ViewGroup; 89import android.view.ViewGroup.LayoutParams; 90import android.view.ViewParent; 91import android.view.ViewTreeObserver; 92import android.view.WindowManager; 93import android.view.accessibility.AccessibilityNodeInfo; 94import android.view.inputmethod.CorrectionInfo; 95import android.view.inputmethod.CursorAnchorInfo; 96import android.view.inputmethod.EditorInfo; 97import android.view.inputmethod.ExtractedText; 98import android.view.inputmethod.ExtractedTextRequest; 99import android.view.inputmethod.InputConnection; 100import android.view.inputmethod.InputMethodManager; 101import android.widget.AdapterView.OnItemClickListener; 102import android.widget.TextView.Drawables; 103import android.widget.TextView.OnEditorActionListener; 104 105import com.android.internal.annotations.VisibleForTesting; 106import com.android.internal.util.ArrayUtils; 107import com.android.internal.util.GrowingArrayUtils; 108import com.android.internal.util.Preconditions; 109import com.android.internal.widget.EditableInputConnection; 110 111import java.lang.annotation.Retention; 112import java.lang.annotation.RetentionPolicy; 113import java.text.BreakIterator; 114import java.util.Arrays; 115import java.util.Comparator; 116import java.util.HashMap; 117import java.util.List; 118 119 120/** 121 * Helper class used by TextView to handle editable text views. 122 * 123 * @hide 124 */ 125public class Editor { 126 private static final String TAG = "Editor"; 127 private static final boolean DEBUG_UNDO = false; 128 129 static final int BLINK = 500; 130 private static final float[] TEMP_POSITION = new float[2]; 131 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 132 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 133 private static final int UNSET_X_VALUE = -1; 134 private static final int UNSET_LINE = -1; 135 // Tag used when the Editor maintains its own separate UndoManager. 136 private static final String UNDO_OWNER_TAG = "Editor"; 137 138 // Ordering constants used to place the Action Mode items in their menu. 139 private static final int MENU_ITEM_ORDER_CUT = 1; 140 private static final int MENU_ITEM_ORDER_COPY = 2; 141 private static final int MENU_ITEM_ORDER_PASTE = 3; 142 private static final int MENU_ITEM_ORDER_SHARE = 4; 143 private static final int MENU_ITEM_ORDER_SELECT_ALL = 5; 144 private static final int MENU_ITEM_ORDER_REPLACE = 6; 145 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 10; 146 147 // Each Editor manages its own undo stack. 148 private final UndoManager mUndoManager = new UndoManager(); 149 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 150 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 151 boolean mAllowUndo = true; 152 153 // Cursor Controllers. 154 InsertionPointCursorController mInsertionPointCursorController; 155 SelectionModifierCursorController mSelectionModifierCursorController; 156 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 157 ActionMode mTextActionMode; 158 boolean mInsertionControllerEnabled; 159 boolean mSelectionControllerEnabled; 160 161 // Used to highlight a word when it is corrected by the IME 162 CorrectionHighlighter mCorrectionHighlighter; 163 164 InputContentType mInputContentType; 165 InputMethodState mInputMethodState; 166 167 private static class TextRenderNode { 168 RenderNode renderNode; 169 boolean isDirty; 170 public TextRenderNode(String name) { 171 isDirty = true; 172 renderNode = RenderNode.create(name, null); 173 } 174 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 175 } 176 TextRenderNode[] mTextRenderNodes; 177 178 boolean mFrozenWithFocus; 179 boolean mSelectionMoved; 180 boolean mTouchFocusSelected; 181 182 KeyListener mKeyListener; 183 int mInputType = EditorInfo.TYPE_NULL; 184 185 boolean mDiscardNextActionUp; 186 boolean mIgnoreActionUpEvent; 187 188 long mShowCursor; 189 Blink mBlink; 190 191 boolean mCursorVisible = true; 192 boolean mSelectAllOnFocus; 193 boolean mTextIsSelectable; 194 195 CharSequence mError; 196 boolean mErrorWasChanged; 197 ErrorPopup mErrorPopup; 198 199 /** 200 * This flag is set if the TextView tries to display an error before it 201 * is attached to the window (so its position is still unknown). 202 * It causes the error to be shown later, when onAttachedToWindow() 203 * is called. 204 */ 205 boolean mShowErrorAfterAttach; 206 207 boolean mInBatchEditControllers; 208 boolean mShowSoftInputOnFocus = true; 209 boolean mPreserveDetachedSelection; 210 boolean mTemporaryDetach; 211 212 SuggestionsPopupWindow mSuggestionsPopupWindow; 213 SuggestionRangeSpan mSuggestionRangeSpan; 214 Runnable mShowSuggestionRunnable; 215 216 final Drawable[] mCursorDrawable = new Drawable[2]; 217 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 218 219 private Drawable mSelectHandleLeft; 220 private Drawable mSelectHandleRight; 221 private Drawable mSelectHandleCenter; 222 223 // Global listener that detects changes in the global position of the TextView 224 private PositionListener mPositionListener; 225 226 float mLastDownPositionX, mLastDownPositionY; 227 Callback mCustomSelectionActionModeCallback; 228 Callback mCustomInsertionActionModeCallback; 229 230 // Set when this TextView gained focus with some text selected. Will start selection mode. 231 boolean mCreatedWithASelection; 232 233 // Indicates the current tap state (first tap, double tap, or triple click). 234 private int mTapState = TAP_STATE_INITIAL; 235 private long mLastTouchUpTime = 0; 236 private static final int TAP_STATE_INITIAL = 0; 237 private static final int TAP_STATE_FIRST_TAP = 1; 238 private static final int TAP_STATE_DOUBLE_TAP = 2; 239 // Only for mouse input. 240 private static final int TAP_STATE_TRIPLE_CLICK = 3; 241 242 private Runnable mInsertionActionModeRunnable; 243 244 // The span controller helps monitoring the changes to which the Editor needs to react: 245 // - EasyEditSpans, for which we have some UI to display on attach and on hide 246 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 247 private SpanController mSpanController; 248 249 WordIterator mWordIterator; 250 SpellChecker mSpellChecker; 251 252 // This word iterator is set with text and used to determine word boundaries 253 // when a user is selecting text. 254 private WordIterator mWordIteratorWithText; 255 // Indicate that the text in the word iterator needs to be updated. 256 private boolean mUpdateWordIteratorText; 257 258 private Rect mTempRect; 259 260 private TextView mTextView; 261 262 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 263 264 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 265 266 private final Runnable mShowFloatingToolbar = new Runnable() { 267 @Override 268 public void run() { 269 if (mTextActionMode != null) { 270 mTextActionMode.hide(0); // hide off. 271 } 272 } 273 }; 274 275 boolean mIsInsertionActionModeStartPending = false; 276 277 Editor(TextView textView) { 278 mTextView = textView; 279 // Synchronize the filter list, which places the undo input filter at the end. 280 mTextView.setFilters(mTextView.getFilters()); 281 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 282 } 283 284 ParcelableParcel saveInstanceState() { 285 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 286 Parcel parcel = state.getParcel(); 287 mUndoManager.saveInstanceState(parcel); 288 mUndoInputFilter.saveInstanceState(parcel); 289 return state; 290 } 291 292 void restoreInstanceState(ParcelableParcel state) { 293 Parcel parcel = state.getParcel(); 294 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 295 mUndoInputFilter.restoreInstanceState(parcel); 296 // Re-associate this object as the owner of undo state. 297 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 298 } 299 300 /** 301 * Forgets all undo and redo operations for this Editor. 302 */ 303 void forgetUndoRedo() { 304 UndoOwner[] owners = { mUndoOwner }; 305 mUndoManager.forgetUndos(owners, -1 /* all */); 306 mUndoManager.forgetRedos(owners, -1 /* all */); 307 } 308 309 boolean canUndo() { 310 UndoOwner[] owners = { mUndoOwner }; 311 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 312 } 313 314 boolean canRedo() { 315 UndoOwner[] owners = { mUndoOwner }; 316 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 317 } 318 319 void undo() { 320 if (!mAllowUndo) { 321 return; 322 } 323 UndoOwner[] owners = { mUndoOwner }; 324 mUndoManager.undo(owners, 1); // Undo 1 action. 325 } 326 327 void redo() { 328 if (!mAllowUndo) { 329 return; 330 } 331 UndoOwner[] owners = { mUndoOwner }; 332 mUndoManager.redo(owners, 1); // Redo 1 action. 333 } 334 335 void replace() { 336 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 337 stopTextActionMode(); 338 Selection.setSelection((Spannable) mTextView.getText(), middle); 339 showSuggestions(); 340 } 341 342 void onAttachedToWindow() { 343 if (mShowErrorAfterAttach) { 344 showError(); 345 mShowErrorAfterAttach = false; 346 } 347 mTemporaryDetach = false; 348 349 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 350 // No need to create the controller. 351 // The get method will add the listener on controller creation. 352 if (mInsertionPointCursorController != null) { 353 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 354 } 355 if (mSelectionModifierCursorController != null) { 356 mSelectionModifierCursorController.resetTouchOffsets(); 357 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 358 } 359 updateSpellCheckSpans(0, mTextView.getText().length(), 360 true /* create the spell checker if needed */); 361 362 if (mTextView.hasTransientState() && 363 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 364 // Since transient state is reference counted make sure it stays matched 365 // with our own calls to it for managing selection. 366 // The action mode callback will set this back again when/if the action mode starts. 367 mTextView.setHasTransientState(false); 368 369 // We had an active selection from before, start the selection mode. 370 startSelectionActionMode(); 371 } 372 373 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 374 resumeBlink(); 375 } 376 377 void onDetachedFromWindow() { 378 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 379 380 if (mError != null) { 381 hideError(); 382 } 383 384 suspendBlink(); 385 386 if (mInsertionPointCursorController != null) { 387 mInsertionPointCursorController.onDetached(); 388 } 389 390 if (mSelectionModifierCursorController != null) { 391 mSelectionModifierCursorController.onDetached(); 392 } 393 394 if (mShowSuggestionRunnable != null) { 395 mTextView.removeCallbacks(mShowSuggestionRunnable); 396 } 397 398 // Cancel the single tap delayed runnable. 399 if (mInsertionActionModeRunnable != null) { 400 mTextView.removeCallbacks(mInsertionActionModeRunnable); 401 } 402 403 mTextView.removeCallbacks(mShowFloatingToolbar); 404 405 discardTextDisplayLists(); 406 407 if (mSpellChecker != null) { 408 mSpellChecker.closeSession(); 409 // Forces the creation of a new SpellChecker next time this window is created. 410 // Will handle the cases where the settings has been changed in the meantime. 411 mSpellChecker = null; 412 } 413 414 mPreserveDetachedSelection = true; 415 hideCursorAndSpanControllers(); 416 stopTextActionMode(); 417 mPreserveDetachedSelection = false; 418 mTemporaryDetach = false; 419 } 420 421 private void discardTextDisplayLists() { 422 if (mTextRenderNodes != null) { 423 for (int i = 0; i < mTextRenderNodes.length; i++) { 424 RenderNode displayList = mTextRenderNodes[i] != null 425 ? mTextRenderNodes[i].renderNode : null; 426 if (displayList != null && displayList.isValid()) { 427 displayList.discardDisplayList(); 428 } 429 } 430 } 431 } 432 433 private void showError() { 434 if (mTextView.getWindowToken() == null) { 435 mShowErrorAfterAttach = true; 436 return; 437 } 438 439 if (mErrorPopup == null) { 440 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 441 final TextView err = (TextView) inflater.inflate( 442 com.android.internal.R.layout.textview_hint, null); 443 444 final float scale = mTextView.getResources().getDisplayMetrics().density; 445 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 446 mErrorPopup.setFocusable(false); 447 // The user is entering text, so the input method is needed. We 448 // don't want the popup to be displayed on top of it. 449 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 450 } 451 452 TextView tv = (TextView) mErrorPopup.getContentView(); 453 chooseSize(mErrorPopup, mError, tv); 454 tv.setText(mError); 455 456 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 457 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 458 } 459 460 public void setError(CharSequence error, Drawable icon) { 461 mError = TextUtils.stringOrSpannedString(error); 462 mErrorWasChanged = true; 463 464 if (mError == null) { 465 setErrorIcon(null); 466 if (mErrorPopup != null) { 467 if (mErrorPopup.isShowing()) { 468 mErrorPopup.dismiss(); 469 } 470 471 mErrorPopup = null; 472 } 473 mShowErrorAfterAttach = false; 474 } else { 475 setErrorIcon(icon); 476 if (mTextView.isFocused()) { 477 showError(); 478 } 479 } 480 } 481 482 private void setErrorIcon(Drawable icon) { 483 Drawables dr = mTextView.mDrawables; 484 if (dr == null) { 485 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 486 } 487 dr.setErrorDrawable(icon, mTextView); 488 489 mTextView.resetResolvedDrawables(); 490 mTextView.invalidate(); 491 mTextView.requestLayout(); 492 } 493 494 private void hideError() { 495 if (mErrorPopup != null) { 496 if (mErrorPopup.isShowing()) { 497 mErrorPopup.dismiss(); 498 } 499 } 500 501 mShowErrorAfterAttach = false; 502 } 503 504 /** 505 * Returns the X offset to make the pointy top of the error point 506 * at the middle of the error icon. 507 */ 508 private int getErrorX() { 509 /* 510 * The "25" is the distance between the point and the right edge 511 * of the background 512 */ 513 final float scale = mTextView.getResources().getDisplayMetrics().density; 514 515 final Drawables dr = mTextView.mDrawables; 516 517 final int layoutDirection = mTextView.getLayoutDirection(); 518 int errorX; 519 int offset; 520 switch (layoutDirection) { 521 default: 522 case View.LAYOUT_DIRECTION_LTR: 523 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 524 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 525 mTextView.getPaddingRight() + offset; 526 break; 527 case View.LAYOUT_DIRECTION_RTL: 528 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 529 errorX = mTextView.getPaddingLeft() + offset; 530 break; 531 } 532 return errorX; 533 } 534 535 /** 536 * Returns the Y offset to make the pointy top of the error point 537 * at the bottom of the error icon. 538 */ 539 private int getErrorY() { 540 /* 541 * Compound, not extended, because the icon is not clipped 542 * if the text height is smaller. 543 */ 544 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 545 int vspace = mTextView.getBottom() - mTextView.getTop() - 546 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 547 548 final Drawables dr = mTextView.mDrawables; 549 550 final int layoutDirection = mTextView.getLayoutDirection(); 551 int height; 552 switch (layoutDirection) { 553 default: 554 case View.LAYOUT_DIRECTION_LTR: 555 height = (dr != null ? dr.mDrawableHeightRight : 0); 556 break; 557 case View.LAYOUT_DIRECTION_RTL: 558 height = (dr != null ? dr.mDrawableHeightLeft : 0); 559 break; 560 } 561 562 int icontop = compoundPaddingTop + (vspace - height) / 2; 563 564 /* 565 * The "2" is the distance between the point and the top edge 566 * of the background. 567 */ 568 final float scale = mTextView.getResources().getDisplayMetrics().density; 569 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 570 } 571 572 void createInputContentTypeIfNeeded() { 573 if (mInputContentType == null) { 574 mInputContentType = new InputContentType(); 575 } 576 } 577 578 void createInputMethodStateIfNeeded() { 579 if (mInputMethodState == null) { 580 mInputMethodState = new InputMethodState(); 581 } 582 } 583 584 boolean isCursorVisible() { 585 // The default value is true, even when there is no associated Editor 586 return mCursorVisible && mTextView.isTextEditable(); 587 } 588 589 void prepareCursorControllers() { 590 boolean windowSupportsHandles = false; 591 592 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 593 if (params instanceof WindowManager.LayoutParams) { 594 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 595 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 596 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 597 } 598 599 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 600 mInsertionControllerEnabled = enabled && isCursorVisible(); 601 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 602 603 if (!mInsertionControllerEnabled) { 604 hideInsertionPointCursorController(); 605 if (mInsertionPointCursorController != null) { 606 mInsertionPointCursorController.onDetached(); 607 mInsertionPointCursorController = null; 608 } 609 } 610 611 if (!mSelectionControllerEnabled) { 612 stopTextActionMode(); 613 if (mSelectionModifierCursorController != null) { 614 mSelectionModifierCursorController.onDetached(); 615 mSelectionModifierCursorController = null; 616 } 617 } 618 } 619 620 void hideInsertionPointCursorController() { 621 if (mInsertionPointCursorController != null) { 622 mInsertionPointCursorController.hide(); 623 } 624 } 625 626 /** 627 * Hides the insertion and span controllers. 628 */ 629 void hideCursorAndSpanControllers() { 630 hideCursorControllers(); 631 hideSpanControllers(); 632 } 633 634 private void hideSpanControllers() { 635 if (mSpanController != null) { 636 mSpanController.hide(); 637 } 638 } 639 640 private void hideCursorControllers() { 641 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 642 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 643 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 644 // to distinguish one from the other. 645 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) || 646 !mSuggestionsPopupWindow.isShowingUp())) { 647 // Should be done before hide insertion point controller since it triggers a show of it 648 mSuggestionsPopupWindow.hide(); 649 } 650 hideInsertionPointCursorController(); 651 } 652 653 /** 654 * Create new SpellCheckSpans on the modified region. 655 */ 656 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 657 // Remove spans whose adjacent characters are text not punctuation 658 mTextView.removeAdjacentSuggestionSpans(start); 659 mTextView.removeAdjacentSuggestionSpans(end); 660 661 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 662 !(mTextView.isInExtractedMode())) { 663 if (mSpellChecker == null && createSpellChecker) { 664 mSpellChecker = new SpellChecker(mTextView); 665 } 666 if (mSpellChecker != null) { 667 mSpellChecker.spellCheck(start, end); 668 } 669 } 670 } 671 672 void onScreenStateChanged(int screenState) { 673 switch (screenState) { 674 case View.SCREEN_STATE_ON: 675 resumeBlink(); 676 break; 677 case View.SCREEN_STATE_OFF: 678 suspendBlink(); 679 break; 680 } 681 } 682 683 private void suspendBlink() { 684 if (mBlink != null) { 685 mBlink.cancel(); 686 } 687 } 688 689 private void resumeBlink() { 690 if (mBlink != null) { 691 mBlink.uncancel(); 692 makeBlink(); 693 } 694 } 695 696 void adjustInputType(boolean password, boolean passwordInputType, 697 boolean webPasswordInputType, boolean numberPasswordInputType) { 698 // mInputType has been set from inputType, possibly modified by mInputMethod. 699 // Specialize mInputType to [web]password if we have a text class and the original input 700 // type was a password. 701 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 702 if (password || passwordInputType) { 703 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 704 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 705 } 706 if (webPasswordInputType) { 707 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 708 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 709 } 710 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 711 if (numberPasswordInputType) { 712 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 713 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 714 } 715 } 716 } 717 718 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 719 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 720 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 721 722 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 723 com.android.internal.R.dimen.textview_error_popup_default_width); 724 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 725 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 726 float max = 0; 727 for (int i = 0; i < l.getLineCount(); i++) { 728 max = Math.max(max, l.getLineWidth(i)); 729 } 730 731 /* 732 * Now set the popup size to be big enough for the text plus the border capped 733 * to DEFAULT_MAX_POPUP_WIDTH 734 */ 735 pop.setWidth(wid + (int) Math.ceil(max)); 736 pop.setHeight(ht + l.getHeight()); 737 } 738 739 void setFrame() { 740 if (mErrorPopup != null) { 741 TextView tv = (TextView) mErrorPopup.getContentView(); 742 chooseSize(mErrorPopup, mError, tv); 743 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 744 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 745 } 746 } 747 748 private int getWordStart(int offset) { 749 // FIXME - For this and similar methods we're not doing anything to check if there's 750 // a LocaleSpan in the text, this may be something we should try handling or checking for. 751 int retOffset = getWordIteratorWithText().prevBoundary(offset); 752 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 753 // On punctuation boundary or within group of punctuation, find punctuation start. 754 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 755 } else { 756 // Not on a punctuation boundary, find the word start. 757 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 758 } 759 if (retOffset == BreakIterator.DONE) { 760 return offset; 761 } 762 return retOffset; 763 } 764 765 private int getWordEnd(int offset) { 766 int retOffset = getWordIteratorWithText().nextBoundary(offset); 767 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 768 // On punctuation boundary or within group of punctuation, find punctuation end. 769 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 770 } else { 771 // Not on a punctuation boundary, find the word end. 772 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 773 } 774 if (retOffset == BreakIterator.DONE) { 775 return offset; 776 } 777 return retOffset; 778 } 779 780 private boolean needsToSelectAllToSelectWordOrParagraph() { 781 if (mTextView.hasPasswordTransformationMethod()) { 782 // Always select all on a password field. 783 // Cut/copy menu entries are not available for passwords, but being able to select all 784 // is however useful to delete or paste to replace the entire content. 785 return true; 786 } 787 788 int inputType = mTextView.getInputType(); 789 int klass = inputType & InputType.TYPE_MASK_CLASS; 790 int variation = inputType & InputType.TYPE_MASK_VARIATION; 791 792 // Specific text field types: select the entire text for these 793 if (klass == InputType.TYPE_CLASS_NUMBER || 794 klass == InputType.TYPE_CLASS_PHONE || 795 klass == InputType.TYPE_CLASS_DATETIME || 796 variation == InputType.TYPE_TEXT_VARIATION_URI || 797 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 798 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 799 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 800 return true; 801 } 802 return false; 803 } 804 805 /** 806 * Adjusts selection to the word under last touch offset. Return true if the operation was 807 * successfully performed. 808 */ 809 private boolean selectCurrentWord() { 810 if (!mTextView.canSelectText()) { 811 return false; 812 } 813 814 if (needsToSelectAllToSelectWordOrParagraph()) { 815 return mTextView.selectAllText(); 816 } 817 818 long lastTouchOffsets = getLastTouchOffsets(); 819 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 820 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 821 822 // Safety check in case standard touch event handling has been bypassed 823 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 824 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 825 826 int selectionStart, selectionEnd; 827 828 // If a URLSpan (web address, email, phone...) is found at that position, select it. 829 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 830 getSpans(minOffset, maxOffset, URLSpan.class); 831 if (urlSpans.length >= 1) { 832 URLSpan urlSpan = urlSpans[0]; 833 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 834 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 835 } else { 836 // FIXME - We should check if there's a LocaleSpan in the text, this may be 837 // something we should try handling or checking for. 838 final WordIterator wordIterator = getWordIterator(); 839 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 840 841 selectionStart = wordIterator.getBeginning(minOffset); 842 selectionEnd = wordIterator.getEnd(maxOffset); 843 844 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 845 selectionStart == selectionEnd) { 846 // Possible when the word iterator does not properly handle the text's language 847 long range = getCharClusterRange(minOffset); 848 selectionStart = TextUtils.unpackRangeStartFromLong(range); 849 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 850 } 851 } 852 853 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 854 return selectionEnd > selectionStart; 855 } 856 857 /** 858 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 859 * successfully performed. 860 */ 861 private boolean selectCurrentParagraph() { 862 if (!mTextView.canSelectText()) { 863 return false; 864 } 865 866 if (needsToSelectAllToSelectWordOrParagraph()) { 867 return mTextView.selectAllText(); 868 } 869 870 long lastTouchOffsets = getLastTouchOffsets(); 871 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 872 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 873 874 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 875 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 876 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 877 if (start < end) { 878 Selection.setSelection((Spannable) mTextView.getText(), start, end); 879 return true; 880 } 881 return false; 882 } 883 884 /** 885 * Get the minimum range of paragraphs that contains startOffset and endOffset. 886 */ 887 private long getParagraphsRange(int startOffset, int endOffset) { 888 final Layout layout = mTextView.getLayout(); 889 if (layout == null) { 890 return TextUtils.packRangeInLong(-1, -1); 891 } 892 final CharSequence text = mTextView.getText(); 893 int minLine = layout.getLineForOffset(startOffset); 894 // Search paragraph start. 895 while (minLine > 0) { 896 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 897 if (text.charAt(prevLineEndOffset - 1) == '\n') { 898 break; 899 } 900 minLine--; 901 } 902 int maxLine = layout.getLineForOffset(endOffset); 903 // Search paragraph end. 904 while (maxLine < layout.getLineCount() - 1) { 905 final int lineEndOffset = layout.getLineEnd(maxLine); 906 if (text.charAt(lineEndOffset - 1) == '\n') { 907 break; 908 } 909 maxLine++; 910 } 911 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 912 } 913 914 void onLocaleChanged() { 915 // Will be re-created on demand in getWordIterator with the proper new locale 916 mWordIterator = null; 917 mWordIteratorWithText = null; 918 } 919 920 /** 921 * @hide 922 */ 923 public WordIterator getWordIterator() { 924 if (mWordIterator == null) { 925 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 926 } 927 return mWordIterator; 928 } 929 930 private WordIterator getWordIteratorWithText() { 931 if (mWordIteratorWithText == null) { 932 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 933 mUpdateWordIteratorText = true; 934 } 935 if (mUpdateWordIteratorText) { 936 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 937 // to the user's selection is needed. A possible solution would be to 938 // copy some number N of characters near the selection and then when the 939 // user approaches N then we'd do another copy of the next N characters. 940 CharSequence text = mTextView.getText(); 941 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 942 mUpdateWordIteratorText = false; 943 } 944 return mWordIteratorWithText; 945 } 946 947 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 948 final Layout layout = mTextView.getLayout(); 949 if (layout == null) return offset; 950 final CharSequence text = mTextView.getText(); 951 final int nextOffset = layout.getPaint().getTextRunCursor(text, 0, text.length(), 952 layout.isRtlCharAt(offset) ? Paint.DIRECTION_RTL : Paint.DIRECTION_LTR, 953 offset, findAfterGivenOffset ? Paint.CURSOR_AFTER : Paint.CURSOR_BEFORE); 954 return nextOffset == -1 ? offset : nextOffset; 955 } 956 957 private long getCharClusterRange(int offset) { 958 final int textLength = mTextView.getText().length(); 959 if (offset < textLength) { 960 return TextUtils.packRangeInLong(offset, getNextCursorOffset(offset, true)); 961 } 962 if (offset - 1 >= 0) { 963 return TextUtils.packRangeInLong(getNextCursorOffset(offset, false), offset); 964 } 965 return TextUtils.packRangeInLong(offset, offset); 966 } 967 968 private boolean touchPositionIsInSelection() { 969 int selectionStart = mTextView.getSelectionStart(); 970 int selectionEnd = mTextView.getSelectionEnd(); 971 972 if (selectionStart == selectionEnd) { 973 return false; 974 } 975 976 if (selectionStart > selectionEnd) { 977 int tmp = selectionStart; 978 selectionStart = selectionEnd; 979 selectionEnd = tmp; 980 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 981 } 982 983 SelectionModifierCursorController selectionController = getSelectionController(); 984 int minOffset = selectionController.getMinTouchOffset(); 985 int maxOffset = selectionController.getMaxTouchOffset(); 986 987 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 988 } 989 990 private PositionListener getPositionListener() { 991 if (mPositionListener == null) { 992 mPositionListener = new PositionListener(); 993 } 994 return mPositionListener; 995 } 996 997 private interface TextViewPositionListener { 998 public void updatePosition(int parentPositionX, int parentPositionY, 999 boolean parentPositionChanged, boolean parentScrolled); 1000 } 1001 1002 private boolean isPositionVisible(final float positionX, final float positionY) { 1003 synchronized (TEMP_POSITION) { 1004 final float[] position = TEMP_POSITION; 1005 position[0] = positionX; 1006 position[1] = positionY; 1007 View view = mTextView; 1008 1009 while (view != null) { 1010 if (view != mTextView) { 1011 // Local scroll is already taken into account in positionX/Y 1012 position[0] -= view.getScrollX(); 1013 position[1] -= view.getScrollY(); 1014 } 1015 1016 if (position[0] < 0 || position[1] < 0 || 1017 position[0] > view.getWidth() || position[1] > view.getHeight()) { 1018 return false; 1019 } 1020 1021 if (!view.getMatrix().isIdentity()) { 1022 view.getMatrix().mapPoints(position); 1023 } 1024 1025 position[0] += view.getLeft(); 1026 position[1] += view.getTop(); 1027 1028 final ViewParent parent = view.getParent(); 1029 if (parent instanceof View) { 1030 view = (View) parent; 1031 } else { 1032 // We've reached the ViewRoot, stop iterating 1033 view = null; 1034 } 1035 } 1036 } 1037 1038 // We've been able to walk up the view hierarchy and the position was never clipped 1039 return true; 1040 } 1041 1042 private boolean isOffsetVisible(int offset) { 1043 Layout layout = mTextView.getLayout(); 1044 if (layout == null) return false; 1045 1046 final int line = layout.getLineForOffset(offset); 1047 final int lineBottom = layout.getLineBottom(line); 1048 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1049 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1050 lineBottom + mTextView.viewportToContentVerticalOffset()); 1051 } 1052 1053 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1054 * in the view. Returns false when the position is in the empty space of left/right of text. 1055 */ 1056 private boolean isPositionOnText(float x, float y) { 1057 Layout layout = mTextView.getLayout(); 1058 if (layout == null) return false; 1059 1060 final int line = mTextView.getLineAtCoordinate(y); 1061 x = mTextView.convertToLocalHorizontalCoordinate(x); 1062 1063 if (x < layout.getLineLeft(line)) return false; 1064 if (x > layout.getLineRight(line)) return false; 1065 return true; 1066 } 1067 1068 public boolean performLongClick(boolean handled) { 1069 // Long press in empty space moves cursor and starts the insertion action mode. 1070 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 1071 mInsertionControllerEnabled) { 1072 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1073 mLastDownPositionY); 1074 stopTextActionMode(); 1075 Selection.setSelection((Spannable) mTextView.getText(), offset); 1076 getInsertionController().show(); 1077 mIsInsertionActionModeStartPending = true; 1078 handled = true; 1079 } 1080 1081 if (!handled && mTextActionMode != null) { 1082 if (touchPositionIsInSelection()) { 1083 // Start a drag 1084 final int start = mTextView.getSelectionStart(); 1085 final int end = mTextView.getSelectionEnd(); 1086 CharSequence selectedText = mTextView.getTransformedText(start, end); 1087 ClipData data = ClipData.newPlainText(null, selectedText); 1088 DragLocalState localState = new DragLocalState(mTextView, start, end); 1089 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 1090 View.DRAG_FLAG_GLOBAL); 1091 stopTextActionMode(); 1092 } else { 1093 stopTextActionMode(); 1094 selectCurrentWordAndStartDrag(); 1095 } 1096 handled = true; 1097 } 1098 1099 // Start a new selection 1100 if (!handled) { 1101 handled = selectCurrentWordAndStartDrag(); 1102 } 1103 1104 return handled; 1105 } 1106 1107 private long getLastTouchOffsets() { 1108 SelectionModifierCursorController selectionController = getSelectionController(); 1109 final int minOffset = selectionController.getMinTouchOffset(); 1110 final int maxOffset = selectionController.getMaxTouchOffset(); 1111 return TextUtils.packRangeInLong(minOffset, maxOffset); 1112 } 1113 1114 void onFocusChanged(boolean focused, int direction) { 1115 mShowCursor = SystemClock.uptimeMillis(); 1116 ensureEndedBatchEdit(); 1117 1118 if (focused) { 1119 int selStart = mTextView.getSelectionStart(); 1120 int selEnd = mTextView.getSelectionEnd(); 1121 1122 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1123 // mode for these, unless there was a specific selection already started. 1124 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1125 selEnd == mTextView.getText().length(); 1126 1127 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1128 !isFocusHighlighted; 1129 1130 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1131 // If a tap was used to give focus to that view, move cursor at tap position. 1132 // Has to be done before onTakeFocus, which can be overloaded. 1133 final int lastTapPosition = getLastTapPosition(); 1134 if (lastTapPosition >= 0) { 1135 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1136 } 1137 1138 // Note this may have to be moved out of the Editor class 1139 MovementMethod mMovement = mTextView.getMovementMethod(); 1140 if (mMovement != null) { 1141 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1142 } 1143 1144 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1145 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1146 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1147 // This special case ensure that we keep current selection in that case. 1148 // It would be better to know why the DecorView does not have focus at that time. 1149 if (((mTextView.isInExtractedMode()) || mSelectionMoved) && 1150 selStart >= 0 && selEnd >= 0) { 1151 /* 1152 * Someone intentionally set the selection, so let them 1153 * do whatever it is that they wanted to do instead of 1154 * the default on-focus behavior. We reset the selection 1155 * here instead of just skipping the onTakeFocus() call 1156 * because some movement methods do something other than 1157 * just setting the selection in theirs and we still 1158 * need to go through that path. 1159 */ 1160 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1161 } 1162 1163 if (mSelectAllOnFocus) { 1164 mTextView.selectAllText(); 1165 } 1166 1167 mTouchFocusSelected = true; 1168 } 1169 1170 mFrozenWithFocus = false; 1171 mSelectionMoved = false; 1172 1173 if (mError != null) { 1174 showError(); 1175 } 1176 1177 makeBlink(); 1178 } else { 1179 if (mError != null) { 1180 hideError(); 1181 } 1182 // Don't leave us in the middle of a batch edit. 1183 mTextView.onEndBatchEdit(); 1184 1185 if (mTextView.isInExtractedMode()) { 1186 // terminateTextSelectionMode removes selection, which we want to keep when 1187 // ExtractEditText goes out of focus. 1188 final int selStart = mTextView.getSelectionStart(); 1189 final int selEnd = mTextView.getSelectionEnd(); 1190 hideCursorAndSpanControllers(); 1191 stopTextActionMode(); 1192 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1193 } else { 1194 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1195 hideCursorAndSpanControllers(); 1196 stopTextActionMode(); 1197 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1198 downgradeEasyCorrectionSpans(); 1199 } 1200 // No need to create the controller 1201 if (mSelectionModifierCursorController != null) { 1202 mSelectionModifierCursorController.resetTouchOffsets(); 1203 } 1204 } 1205 } 1206 1207 /** 1208 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1209 * span. 1210 */ 1211 private void downgradeEasyCorrectionSpans() { 1212 CharSequence text = mTextView.getText(); 1213 if (text instanceof Spannable) { 1214 Spannable spannable = (Spannable) text; 1215 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1216 spannable.length(), SuggestionSpan.class); 1217 for (int i = 0; i < suggestionSpans.length; i++) { 1218 int flags = suggestionSpans[i].getFlags(); 1219 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1220 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1221 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1222 suggestionSpans[i].setFlags(flags); 1223 } 1224 } 1225 } 1226 } 1227 1228 void sendOnTextChanged(int start, int after) { 1229 updateSpellCheckSpans(start, start + after, false); 1230 1231 // Flip flag to indicate the word iterator needs to have the text reset. 1232 mUpdateWordIteratorText = true; 1233 1234 // Hide the controllers as soon as text is modified (typing, procedural...) 1235 // We do not hide the span controllers, since they can be added when a new text is 1236 // inserted into the text view (voice IME). 1237 hideCursorControllers(); 1238 // Reset drag accelerator. 1239 if (mSelectionModifierCursorController != null) { 1240 mSelectionModifierCursorController.resetTouchOffsets(); 1241 } 1242 stopTextActionMode(); 1243 } 1244 1245 private int getLastTapPosition() { 1246 // No need to create the controller at that point, no last tap position saved 1247 if (mSelectionModifierCursorController != null) { 1248 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1249 if (lastTapPosition >= 0) { 1250 // Safety check, should not be possible. 1251 if (lastTapPosition > mTextView.getText().length()) { 1252 lastTapPosition = mTextView.getText().length(); 1253 } 1254 return lastTapPosition; 1255 } 1256 } 1257 1258 return -1; 1259 } 1260 1261 void onWindowFocusChanged(boolean hasWindowFocus) { 1262 if (hasWindowFocus) { 1263 if (mBlink != null) { 1264 mBlink.uncancel(); 1265 makeBlink(); 1266 } 1267 final InputMethodManager imm = InputMethodManager.peekInstance(); 1268 final boolean immFullScreen = (imm != null && imm.isFullscreenMode()); 1269 if (mSelectionModifierCursorController != null && mTextView.hasSelection() 1270 && !immFullScreen && mTextActionMode != null) { 1271 mSelectionModifierCursorController.show(); 1272 } 1273 } else { 1274 if (mBlink != null) { 1275 mBlink.cancel(); 1276 } 1277 if (mInputContentType != null) { 1278 mInputContentType.enterDown = false; 1279 } 1280 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1281 hideCursorAndSpanControllers(); 1282 if (mSelectionModifierCursorController != null) { 1283 mSelectionModifierCursorController.hide(); 1284 } 1285 if (mSuggestionsPopupWindow != null) { 1286 mSuggestionsPopupWindow.onParentLostFocus(); 1287 } 1288 1289 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1290 ensureEndedBatchEdit(); 1291 } 1292 } 1293 1294 private void updateTapState(MotionEvent event) { 1295 final int action = event.getActionMasked(); 1296 if (action == MotionEvent.ACTION_DOWN) { 1297 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1298 // Detect double tap and triple click. 1299 if (((mTapState == TAP_STATE_FIRST_TAP) 1300 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1301 && (SystemClock.uptimeMillis() - mLastTouchUpTime) <= 1302 ViewConfiguration.getDoubleTapTimeout()) { 1303 if (mTapState == TAP_STATE_FIRST_TAP) { 1304 mTapState = TAP_STATE_DOUBLE_TAP; 1305 } else { 1306 mTapState = TAP_STATE_TRIPLE_CLICK; 1307 } 1308 } else { 1309 mTapState = TAP_STATE_FIRST_TAP; 1310 } 1311 } 1312 if (action == MotionEvent.ACTION_UP) { 1313 mLastTouchUpTime = SystemClock.uptimeMillis(); 1314 } 1315 } 1316 1317 void onTouchEvent(MotionEvent event) { 1318 updateTapState(event); 1319 updateFloatingToolbarVisibility(event); 1320 1321 if (hasSelectionController()) { 1322 getSelectionController().onTouchEvent(event); 1323 } 1324 1325 if (mShowSuggestionRunnable != null) { 1326 mTextView.removeCallbacks(mShowSuggestionRunnable); 1327 mShowSuggestionRunnable = null; 1328 } 1329 1330 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1331 mLastDownPositionX = event.getX(); 1332 mLastDownPositionY = event.getY(); 1333 1334 // Reset this state; it will be re-set if super.onTouchEvent 1335 // causes focus to move to the view. 1336 mTouchFocusSelected = false; 1337 mIgnoreActionUpEvent = false; 1338 } 1339 } 1340 1341 private void updateFloatingToolbarVisibility(MotionEvent event) { 1342 if (mTextActionMode != null) { 1343 switch (event.getActionMasked()) { 1344 case MotionEvent.ACTION_MOVE: 1345 hideFloatingToolbar(); 1346 break; 1347 case MotionEvent.ACTION_UP: // fall through 1348 case MotionEvent.ACTION_CANCEL: 1349 showFloatingToolbar(); 1350 } 1351 } 1352 } 1353 1354 private void hideFloatingToolbar() { 1355 if (mTextActionMode != null) { 1356 mTextView.removeCallbacks(mShowFloatingToolbar); 1357 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1358 } 1359 } 1360 1361 private void showFloatingToolbar() { 1362 if (mTextActionMode != null) { 1363 // Delay "show" so it doesn't interfere with click confirmations 1364 // or double-clicks that could "dismiss" the floating toolbar. 1365 int delay = ViewConfiguration.getDoubleTapTimeout(); 1366 mTextView.postDelayed(mShowFloatingToolbar, delay); 1367 } 1368 } 1369 1370 public void beginBatchEdit() { 1371 mInBatchEditControllers = true; 1372 final InputMethodState ims = mInputMethodState; 1373 if (ims != null) { 1374 int nesting = ++ims.mBatchEditNesting; 1375 if (nesting == 1) { 1376 ims.mCursorChanged = false; 1377 ims.mChangedDelta = 0; 1378 if (ims.mContentChanged) { 1379 // We already have a pending change from somewhere else, 1380 // so turn this into a full update. 1381 ims.mChangedStart = 0; 1382 ims.mChangedEnd = mTextView.getText().length(); 1383 } else { 1384 ims.mChangedStart = EXTRACT_UNKNOWN; 1385 ims.mChangedEnd = EXTRACT_UNKNOWN; 1386 ims.mContentChanged = false; 1387 } 1388 mUndoInputFilter.beginBatchEdit(); 1389 mTextView.onBeginBatchEdit(); 1390 } 1391 } 1392 } 1393 1394 public void endBatchEdit() { 1395 mInBatchEditControllers = false; 1396 final InputMethodState ims = mInputMethodState; 1397 if (ims != null) { 1398 int nesting = --ims.mBatchEditNesting; 1399 if (nesting == 0) { 1400 finishBatchEdit(ims); 1401 } 1402 } 1403 } 1404 1405 void ensureEndedBatchEdit() { 1406 final InputMethodState ims = mInputMethodState; 1407 if (ims != null && ims.mBatchEditNesting != 0) { 1408 ims.mBatchEditNesting = 0; 1409 finishBatchEdit(ims); 1410 } 1411 } 1412 1413 void finishBatchEdit(final InputMethodState ims) { 1414 mTextView.onEndBatchEdit(); 1415 mUndoInputFilter.endBatchEdit(); 1416 1417 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1418 mTextView.updateAfterEdit(); 1419 reportExtractedText(); 1420 } else if (ims.mCursorChanged) { 1421 // Cheesy way to get us to report the current cursor location. 1422 mTextView.invalidateCursor(); 1423 } 1424 // sendUpdateSelection knows to avoid sending if the selection did 1425 // not actually change. 1426 sendUpdateSelection(); 1427 } 1428 1429 static final int EXTRACT_NOTHING = -2; 1430 static final int EXTRACT_UNKNOWN = -1; 1431 1432 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1433 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1434 EXTRACT_UNKNOWN, outText); 1435 } 1436 1437 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1438 int partialStartOffset, int partialEndOffset, int delta, 1439 @Nullable ExtractedText outText) { 1440 if (request == null || outText == null) { 1441 return false; 1442 } 1443 1444 final CharSequence content = mTextView.getText(); 1445 if (content == null) { 1446 return false; 1447 } 1448 1449 if (partialStartOffset != EXTRACT_NOTHING) { 1450 final int N = content.length(); 1451 if (partialStartOffset < 0) { 1452 outText.partialStartOffset = outText.partialEndOffset = -1; 1453 partialStartOffset = 0; 1454 partialEndOffset = N; 1455 } else { 1456 // Now use the delta to determine the actual amount of text 1457 // we need. 1458 partialEndOffset += delta; 1459 // Adjust offsets to ensure we contain full spans. 1460 if (content instanceof Spanned) { 1461 Spanned spanned = (Spanned)content; 1462 Object[] spans = spanned.getSpans(partialStartOffset, 1463 partialEndOffset, ParcelableSpan.class); 1464 int i = spans.length; 1465 while (i > 0) { 1466 i--; 1467 int j = spanned.getSpanStart(spans[i]); 1468 if (j < partialStartOffset) partialStartOffset = j; 1469 j = spanned.getSpanEnd(spans[i]); 1470 if (j > partialEndOffset) partialEndOffset = j; 1471 } 1472 } 1473 outText.partialStartOffset = partialStartOffset; 1474 outText.partialEndOffset = partialEndOffset - delta; 1475 1476 if (partialStartOffset > N) { 1477 partialStartOffset = N; 1478 } else if (partialStartOffset < 0) { 1479 partialStartOffset = 0; 1480 } 1481 if (partialEndOffset > N) { 1482 partialEndOffset = N; 1483 } else if (partialEndOffset < 0) { 1484 partialEndOffset = 0; 1485 } 1486 } 1487 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1488 outText.text = content.subSequence(partialStartOffset, 1489 partialEndOffset); 1490 } else { 1491 outText.text = TextUtils.substring(content, partialStartOffset, 1492 partialEndOffset); 1493 } 1494 } else { 1495 outText.partialStartOffset = 0; 1496 outText.partialEndOffset = 0; 1497 outText.text = ""; 1498 } 1499 outText.flags = 0; 1500 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1501 outText.flags |= ExtractedText.FLAG_SELECTING; 1502 } 1503 if (mTextView.isSingleLine()) { 1504 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1505 } 1506 outText.startOffset = 0; 1507 outText.selectionStart = mTextView.getSelectionStart(); 1508 outText.selectionEnd = mTextView.getSelectionEnd(); 1509 return true; 1510 } 1511 1512 boolean reportExtractedText() { 1513 final Editor.InputMethodState ims = mInputMethodState; 1514 if (ims != null) { 1515 final boolean contentChanged = ims.mContentChanged; 1516 if (contentChanged || ims.mSelectionModeChanged) { 1517 ims.mContentChanged = false; 1518 ims.mSelectionModeChanged = false; 1519 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1520 if (req != null) { 1521 InputMethodManager imm = InputMethodManager.peekInstance(); 1522 if (imm != null) { 1523 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1524 "Retrieving extracted start=" + ims.mChangedStart + 1525 " end=" + ims.mChangedEnd + 1526 " delta=" + ims.mChangedDelta); 1527 if (ims.mChangedStart < 0 && !contentChanged) { 1528 ims.mChangedStart = EXTRACT_NOTHING; 1529 } 1530 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1531 ims.mChangedDelta, ims.mExtractedText)) { 1532 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1533 "Reporting extracted start=" + 1534 ims.mExtractedText.partialStartOffset + 1535 " end=" + ims.mExtractedText.partialEndOffset + 1536 ": " + ims.mExtractedText.text); 1537 1538 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1539 ims.mChangedStart = EXTRACT_UNKNOWN; 1540 ims.mChangedEnd = EXTRACT_UNKNOWN; 1541 ims.mChangedDelta = 0; 1542 ims.mContentChanged = false; 1543 return true; 1544 } 1545 } 1546 } 1547 } 1548 } 1549 return false; 1550 } 1551 1552 private void sendUpdateSelection() { 1553 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1554 final InputMethodManager imm = InputMethodManager.peekInstance(); 1555 if (null != imm) { 1556 final int selectionStart = mTextView.getSelectionStart(); 1557 final int selectionEnd = mTextView.getSelectionEnd(); 1558 int candStart = -1; 1559 int candEnd = -1; 1560 if (mTextView.getText() instanceof Spannable) { 1561 final Spannable sp = (Spannable) mTextView.getText(); 1562 candStart = EditableInputConnection.getComposingSpanStart(sp); 1563 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1564 } 1565 // InputMethodManager#updateSelection skips sending the message if 1566 // none of the parameters have changed since the last time we called it. 1567 imm.updateSelection(mTextView, 1568 selectionStart, selectionEnd, candStart, candEnd); 1569 } 1570 } 1571 } 1572 1573 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1574 int cursorOffsetVertical) { 1575 final int selectionStart = mTextView.getSelectionStart(); 1576 final int selectionEnd = mTextView.getSelectionEnd(); 1577 1578 final InputMethodState ims = mInputMethodState; 1579 if (ims != null && ims.mBatchEditNesting == 0) { 1580 InputMethodManager imm = InputMethodManager.peekInstance(); 1581 if (imm != null) { 1582 if (imm.isActive(mTextView)) { 1583 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1584 // We are in extract mode and the content has changed 1585 // in some way... just report complete new text to the 1586 // input method. 1587 reportExtractedText(); 1588 } 1589 } 1590 } 1591 } 1592 1593 if (mCorrectionHighlighter != null) { 1594 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1595 } 1596 1597 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1598 drawCursor(canvas, cursorOffsetVertical); 1599 // Rely on the drawable entirely, do not draw the cursor line. 1600 // Has to be done after the IMM related code above which relies on the highlight. 1601 highlight = null; 1602 } 1603 1604 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1605 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1606 cursorOffsetVertical); 1607 } else { 1608 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1609 } 1610 } 1611 1612 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1613 Paint highlightPaint, int cursorOffsetVertical) { 1614 final long lineRange = layout.getLineRangeForDraw(canvas); 1615 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1616 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1617 if (lastLine < 0) return; 1618 1619 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1620 firstLine, lastLine); 1621 1622 if (layout instanceof DynamicLayout) { 1623 if (mTextRenderNodes == null) { 1624 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1625 } 1626 1627 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1628 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1629 int[] blockIndices = dynamicLayout.getBlockIndices(); 1630 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1631 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1632 1633 int endOfPreviousBlock = -1; 1634 int searchStartIndex = 0; 1635 for (int i = 0; i < numberOfBlocks; i++) { 1636 int blockEndLine = blockEndLines[i]; 1637 int blockIndex = blockIndices[i]; 1638 1639 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1640 if (blockIsInvalid) { 1641 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1642 searchStartIndex); 1643 // Note how dynamic layout's internal block indices get updated from Editor 1644 blockIndices[i] = blockIndex; 1645 if (mTextRenderNodes[blockIndex] != null) { 1646 mTextRenderNodes[blockIndex].isDirty = true; 1647 } 1648 searchStartIndex = blockIndex + 1; 1649 } 1650 1651 if (mTextRenderNodes[blockIndex] == null) { 1652 mTextRenderNodes[blockIndex] = 1653 new TextRenderNode("Text " + blockIndex); 1654 } 1655 1656 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1657 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1658 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1659 final int blockBeginLine = endOfPreviousBlock + 1; 1660 final int top = layout.getLineTop(blockBeginLine); 1661 final int bottom = layout.getLineBottom(blockEndLine); 1662 int left = 0; 1663 int right = mTextView.getWidth(); 1664 if (mTextView.getHorizontallyScrolling()) { 1665 float min = Float.MAX_VALUE; 1666 float max = Float.MIN_VALUE; 1667 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1668 min = Math.min(min, layout.getLineLeft(line)); 1669 max = Math.max(max, layout.getLineRight(line)); 1670 } 1671 left = (int) min; 1672 right = (int) (max + 0.5f); 1673 } 1674 1675 // Rebuild display list if it is invalid 1676 if (blockDisplayListIsInvalid) { 1677 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1678 right - left, bottom - top); 1679 try { 1680 // drawText is always relative to TextView's origin, this translation 1681 // brings this range of text back to the top left corner of the viewport 1682 displayListCanvas.translate(-left, -top); 1683 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1684 mTextRenderNodes[blockIndex].isDirty = false; 1685 // No need to untranslate, previous context is popped after 1686 // drawDisplayList 1687 } finally { 1688 blockDisplayList.end(displayListCanvas); 1689 // Same as drawDisplayList below, handled by our TextView's parent 1690 blockDisplayList.setClipToBounds(false); 1691 } 1692 } 1693 1694 // Valid disply list whose index is >= indexFirstChangedBlock 1695 // only needs to update its drawing location. 1696 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1697 } 1698 1699 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1700 1701 endOfPreviousBlock = blockEndLine; 1702 } 1703 1704 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1705 } else { 1706 // Boring layout is used for empty and hint text 1707 layout.drawText(canvas, firstLine, lastLine); 1708 } 1709 } 1710 1711 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1712 int searchStartIndex) { 1713 int length = mTextRenderNodes.length; 1714 for (int i = searchStartIndex; i < length; i++) { 1715 boolean blockIndexFound = false; 1716 for (int j = 0; j < numberOfBlocks; j++) { 1717 if (blockIndices[j] == i) { 1718 blockIndexFound = true; 1719 break; 1720 } 1721 } 1722 if (blockIndexFound) continue; 1723 return i; 1724 } 1725 1726 // No available index found, the pool has to grow 1727 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1728 return length; 1729 } 1730 1731 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1732 final boolean translate = cursorOffsetVertical != 0; 1733 if (translate) canvas.translate(0, cursorOffsetVertical); 1734 for (int i = 0; i < mCursorCount; i++) { 1735 mCursorDrawable[i].draw(canvas); 1736 } 1737 if (translate) canvas.translate(0, -cursorOffsetVertical); 1738 } 1739 1740 /** 1741 * Invalidates all the sub-display lists that overlap the specified character range 1742 */ 1743 void invalidateTextDisplayList(Layout layout, int start, int end) { 1744 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1745 final int firstLine = layout.getLineForOffset(start); 1746 final int lastLine = layout.getLineForOffset(end); 1747 1748 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1749 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1750 int[] blockIndices = dynamicLayout.getBlockIndices(); 1751 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1752 1753 int i = 0; 1754 // Skip the blocks before firstLine 1755 while (i < numberOfBlocks) { 1756 if (blockEndLines[i] >= firstLine) break; 1757 i++; 1758 } 1759 1760 // Invalidate all subsequent blocks until lastLine is passed 1761 while (i < numberOfBlocks) { 1762 final int blockIndex = blockIndices[i]; 1763 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1764 mTextRenderNodes[blockIndex].isDirty = true; 1765 } 1766 if (blockEndLines[i] >= lastLine) break; 1767 i++; 1768 } 1769 } 1770 } 1771 1772 void invalidateTextDisplayList() { 1773 if (mTextRenderNodes != null) { 1774 for (int i = 0; i < mTextRenderNodes.length; i++) { 1775 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1776 } 1777 } 1778 } 1779 1780 void updateCursorsPositions() { 1781 if (mTextView.mCursorDrawableRes == 0) { 1782 mCursorCount = 0; 1783 return; 1784 } 1785 1786 Layout layout = getActiveLayout(); 1787 final int offset = mTextView.getSelectionStart(); 1788 final int line = layout.getLineForOffset(offset); 1789 final int top = layout.getLineTop(line); 1790 final int bottom = layout.getLineTop(line + 1); 1791 1792 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1793 1794 int middle = bottom; 1795 if (mCursorCount == 2) { 1796 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1797 middle = (top + bottom) >> 1; 1798 } 1799 1800 boolean clamped = layout.shouldClampCursor(line); 1801 updateCursorPosition(0, top, middle, layout.getPrimaryHorizontal(offset, clamped)); 1802 1803 if (mCursorCount == 2) { 1804 updateCursorPosition(1, middle, bottom, 1805 layout.getSecondaryHorizontal(offset, clamped)); 1806 } 1807 } 1808 1809 /** 1810 * Start an Insertion action mode. 1811 */ 1812 void startInsertionActionMode() { 1813 if (mInsertionActionModeRunnable != null) { 1814 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1815 } 1816 if (extractedTextModeWillBeStarted()) { 1817 return; 1818 } 1819 stopTextActionMode(); 1820 1821 ActionMode.Callback actionModeCallback = 1822 new TextActionModeCallback(false /* hasSelection */); 1823 mTextActionMode = mTextView.startActionMode( 1824 actionModeCallback, ActionMode.TYPE_FLOATING); 1825 if (mTextActionMode != null && getInsertionController() != null) { 1826 getInsertionController().show(); 1827 } 1828 } 1829 1830 /** 1831 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1832 * are shown if there is a selection, otherwise the insertion handle is shown. This should be 1833 * used when the mode is started from a non-touch event. 1834 * 1835 * @return true if the selection mode was actually started. 1836 */ 1837 boolean startSelectionActionMode() { 1838 boolean selectionStarted = startSelectionActionModeInternal(); 1839 if (selectionStarted) { 1840 getSelectionController().show(); 1841 } else if (getInsertionController() != null) { 1842 getInsertionController().show(); 1843 } 1844 return selectionStarted; 1845 } 1846 1847 /** 1848 * If the TextView allows text selection, selects the current word when no existing selection 1849 * was available and starts a drag. 1850 * 1851 * @return true if the drag was started. 1852 */ 1853 private boolean selectCurrentWordAndStartDrag() { 1854 if (mInsertionActionModeRunnable != null) { 1855 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1856 } 1857 if (extractedTextModeWillBeStarted()) { 1858 return false; 1859 } 1860 if (mTextActionMode != null) { 1861 mTextActionMode.finish(); 1862 } 1863 if (!checkFieldAndSelectCurrentWord()) { 1864 return false; 1865 } 1866 1867 // Avoid dismissing the selection if it exists. 1868 mPreserveDetachedSelection = true; 1869 stopTextActionMode(); 1870 mPreserveDetachedSelection = false; 1871 1872 getSelectionController().enterDrag( 1873 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 1874 return true; 1875 } 1876 1877 /** 1878 * Checks whether a selection can be performed on the current TextView and if so selects 1879 * the current word. 1880 * 1881 * @return true if there already was a selection or if the current word was selected. 1882 */ 1883 boolean checkFieldAndSelectCurrentWord() { 1884 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1885 Log.w(TextView.LOG_TAG, 1886 "TextView does not support text selection. Selection cancelled."); 1887 return false; 1888 } 1889 1890 if (!mTextView.hasSelection()) { 1891 // There may already be a selection on device rotation 1892 return selectCurrentWord(); 1893 } 1894 return true; 1895 } 1896 1897 private boolean startSelectionActionModeInternal() { 1898 if (mTextActionMode != null) { 1899 // Text action mode is already started 1900 mTextActionMode.invalidate(); 1901 return false; 1902 } 1903 1904 if (!checkFieldAndSelectCurrentWord()) { 1905 return false; 1906 } 1907 1908 boolean willExtract = extractedTextModeWillBeStarted(); 1909 1910 // Do not start the action mode when extracted text will show up full screen, which would 1911 // immediately hide the newly created action bar and would be visually distracting. 1912 if (!willExtract) { 1913 ActionMode.Callback actionModeCallback = 1914 new TextActionModeCallback(true /* hasSelection */); 1915 mTextActionMode = mTextView.startActionMode( 1916 actionModeCallback, ActionMode.TYPE_FLOATING); 1917 } 1918 1919 final boolean selectionStarted = mTextActionMode != null || willExtract; 1920 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1921 // Show the IME to be able to replace text, except when selecting non editable text. 1922 final InputMethodManager imm = InputMethodManager.peekInstance(); 1923 if (imm != null) { 1924 imm.showSoftInput(mTextView, 0, null); 1925 } 1926 } 1927 return selectionStarted; 1928 } 1929 1930 boolean extractedTextModeWillBeStarted() { 1931 if (!(mTextView.isInExtractedMode())) { 1932 final InputMethodManager imm = InputMethodManager.peekInstance(); 1933 return imm != null && imm.isFullscreenMode(); 1934 } 1935 return false; 1936 } 1937 1938 /** 1939 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1940 * the current cursor position or selection range. This method is consistent with the 1941 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1942 */ 1943 private boolean shouldOfferToShowSuggestions() { 1944 CharSequence text = mTextView.getText(); 1945 if (!(text instanceof Spannable)) return false; 1946 1947 final Spannable spannable = (Spannable) text; 1948 final int selectionStart = mTextView.getSelectionStart(); 1949 final int selectionEnd = mTextView.getSelectionEnd(); 1950 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1951 SuggestionSpan.class); 1952 if (suggestionSpans.length == 0) { 1953 return false; 1954 } 1955 if (selectionStart == selectionEnd) { 1956 // Spans overlap the cursor. 1957 for (int i = 0; i < suggestionSpans.length; i++) { 1958 if (suggestionSpans[i].getSuggestions().length > 0) { 1959 return true; 1960 } 1961 } 1962 return false; 1963 } 1964 int minSpanStart = mTextView.getText().length(); 1965 int maxSpanEnd = 0; 1966 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1967 int unionOfSpansCoveringSelectionStartEnd = 0; 1968 boolean hasValidSuggestions = false; 1969 for (int i = 0; i < suggestionSpans.length; i++) { 1970 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1971 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1972 minSpanStart = Math.min(minSpanStart, spanStart); 1973 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1974 if (selectionStart < spanStart || selectionStart > spanEnd) { 1975 // The span doesn't cover the current selection start point. 1976 continue; 1977 } 1978 hasValidSuggestions = 1979 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 1980 unionOfSpansCoveringSelectionStartStart = 1981 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1982 unionOfSpansCoveringSelectionStartEnd = 1983 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1984 } 1985 if (!hasValidSuggestions) { 1986 return false; 1987 } 1988 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1989 // No spans cover the selection start point. 1990 return false; 1991 } 1992 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1993 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1994 // There is a span that is not covered by the union. In this case, we soouldn't offer 1995 // to show suggestions as it's confusing. 1996 return false; 1997 } 1998 return true; 1999 } 2000 2001 /** 2002 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2003 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2004 */ 2005 private boolean isCursorInsideEasyCorrectionSpan() { 2006 Spannable spannable = (Spannable) mTextView.getText(); 2007 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2008 mTextView.getSelectionEnd(), SuggestionSpan.class); 2009 for (int i = 0; i < suggestionSpans.length; i++) { 2010 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2011 return true; 2012 } 2013 } 2014 return false; 2015 } 2016 2017 void onTouchUpEvent(MotionEvent event) { 2018 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2019 hideCursorAndSpanControllers(); 2020 stopTextActionMode(); 2021 CharSequence text = mTextView.getText(); 2022 if (!selectAllGotFocus && text.length() > 0) { 2023 // Move cursor 2024 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2025 Selection.setSelection((Spannable) text, offset); 2026 if (mSpellChecker != null) { 2027 // When the cursor moves, the word that was typed may need spell check 2028 mSpellChecker.onSelectionChanged(); 2029 } 2030 2031 if (!extractedTextModeWillBeStarted()) { 2032 if (isCursorInsideEasyCorrectionSpan()) { 2033 // Cancel the single tap delayed runnable. 2034 if (mInsertionActionModeRunnable != null) { 2035 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2036 } 2037 2038 mShowSuggestionRunnable = new Runnable() { 2039 public void run() { 2040 showSuggestions(); 2041 } 2042 }; 2043 // removeCallbacks is performed on every touch 2044 mTextView.postDelayed(mShowSuggestionRunnable, 2045 ViewConfiguration.getDoubleTapTimeout()); 2046 } else if (hasInsertionController()) { 2047 getInsertionController().show(); 2048 } 2049 } 2050 } 2051 } 2052 2053 protected void stopTextActionMode() { 2054 if (mTextActionMode != null) { 2055 // This will hide the mSelectionModifierCursorController 2056 mTextActionMode.finish(); 2057 } 2058 } 2059 2060 /** 2061 * @return True if this view supports insertion handles. 2062 */ 2063 boolean hasInsertionController() { 2064 return mInsertionControllerEnabled; 2065 } 2066 2067 /** 2068 * @return True if this view supports selection handles. 2069 */ 2070 boolean hasSelectionController() { 2071 return mSelectionControllerEnabled; 2072 } 2073 2074 InsertionPointCursorController getInsertionController() { 2075 if (!mInsertionControllerEnabled) { 2076 return null; 2077 } 2078 2079 if (mInsertionPointCursorController == null) { 2080 mInsertionPointCursorController = new InsertionPointCursorController(); 2081 2082 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2083 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2084 } 2085 2086 return mInsertionPointCursorController; 2087 } 2088 2089 SelectionModifierCursorController getSelectionController() { 2090 if (!mSelectionControllerEnabled) { 2091 return null; 2092 } 2093 2094 if (mSelectionModifierCursorController == null) { 2095 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2096 2097 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2098 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2099 } 2100 2101 return mSelectionModifierCursorController; 2102 } 2103 2104 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2105 if (mCursorDrawable[cursorIndex] == null) 2106 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2107 mTextView.mCursorDrawableRes); 2108 2109 if (mTempRect == null) mTempRect = new Rect(); 2110 mCursorDrawable[cursorIndex].getPadding(mTempRect); 2111 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 2112 horizontal = Math.max(0.5f, horizontal - 0.5f); 2113 final int left = (int) (horizontal) - mTempRect.left; 2114 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 2115 bottom + mTempRect.bottom); 2116 } 2117 2118 /** 2119 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2120 * a dictionary) from the current input method, provided by it calling 2121 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2122 * implementation flashes the background of the corrected word to provide feedback to the user. 2123 * 2124 * @param info The auto correct info about the text that was corrected. 2125 */ 2126 public void onCommitCorrection(CorrectionInfo info) { 2127 if (mCorrectionHighlighter == null) { 2128 mCorrectionHighlighter = new CorrectionHighlighter(); 2129 } else { 2130 mCorrectionHighlighter.invalidate(false); 2131 } 2132 2133 mCorrectionHighlighter.highlight(info); 2134 } 2135 2136 void showSuggestions() { 2137 if (mSuggestionsPopupWindow == null) { 2138 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 2139 } 2140 hideCursorAndSpanControllers(); 2141 stopTextActionMode(); 2142 mSuggestionsPopupWindow.show(); 2143 } 2144 2145 void onScrollChanged() { 2146 if (mPositionListener != null) { 2147 mPositionListener.onScrollChanged(); 2148 } 2149 if (mTextActionMode != null) { 2150 mTextActionMode.invalidateContentRect(); 2151 } 2152 } 2153 2154 /** 2155 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2156 */ 2157 private boolean shouldBlink() { 2158 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2159 2160 final int start = mTextView.getSelectionStart(); 2161 if (start < 0) return false; 2162 2163 final int end = mTextView.getSelectionEnd(); 2164 if (end < 0) return false; 2165 2166 return start == end; 2167 } 2168 2169 void makeBlink() { 2170 if (shouldBlink()) { 2171 mShowCursor = SystemClock.uptimeMillis(); 2172 if (mBlink == null) mBlink = new Blink(); 2173 mTextView.removeCallbacks(mBlink); 2174 mTextView.postDelayed(mBlink, BLINK); 2175 } else { 2176 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2177 } 2178 } 2179 2180 private class Blink implements Runnable { 2181 private boolean mCancelled; 2182 2183 public void run() { 2184 if (mCancelled) { 2185 return; 2186 } 2187 2188 mTextView.removeCallbacks(this); 2189 2190 if (shouldBlink()) { 2191 if (mTextView.getLayout() != null) { 2192 mTextView.invalidateCursorPath(); 2193 } 2194 2195 mTextView.postDelayed(this, BLINK); 2196 } 2197 } 2198 2199 void cancel() { 2200 if (!mCancelled) { 2201 mTextView.removeCallbacks(this); 2202 mCancelled = true; 2203 } 2204 } 2205 2206 void uncancel() { 2207 mCancelled = false; 2208 } 2209 } 2210 2211 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 2212 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2213 com.android.internal.R.layout.text_drag_thumbnail, null); 2214 2215 if (shadowView == null) { 2216 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2217 } 2218 2219 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2220 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2221 } 2222 shadowView.setText(text); 2223 shadowView.setTextColor(mTextView.getTextColors()); 2224 2225 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2226 shadowView.setGravity(Gravity.CENTER); 2227 2228 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2229 ViewGroup.LayoutParams.WRAP_CONTENT)); 2230 2231 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2232 shadowView.measure(size, size); 2233 2234 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2235 shadowView.invalidate(); 2236 return new DragShadowBuilder(shadowView); 2237 } 2238 2239 private static class DragLocalState { 2240 public TextView sourceTextView; 2241 public int start, end; 2242 2243 public DragLocalState(TextView sourceTextView, int start, int end) { 2244 this.sourceTextView = sourceTextView; 2245 this.start = start; 2246 this.end = end; 2247 } 2248 } 2249 2250 void onDrop(DragEvent event) { 2251 StringBuilder content = new StringBuilder(""); 2252 ClipData clipData = event.getClipData(); 2253 final int itemCount = clipData.getItemCount(); 2254 for (int i=0; i < itemCount; i++) { 2255 Item item = clipData.getItemAt(i); 2256 content.append(item.coerceToStyledText(mTextView.getContext())); 2257 } 2258 2259 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2260 2261 Object localState = event.getLocalState(); 2262 DragLocalState dragLocalState = null; 2263 if (localState instanceof DragLocalState) { 2264 dragLocalState = (DragLocalState) localState; 2265 } 2266 boolean dragDropIntoItself = dragLocalState != null && 2267 dragLocalState.sourceTextView == mTextView; 2268 2269 if (dragDropIntoItself) { 2270 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2271 // A drop inside the original selection discards the drop. 2272 return; 2273 } 2274 } 2275 2276 final int originalLength = mTextView.getText().length(); 2277 int min = offset; 2278 int max = offset; 2279 2280 Selection.setSelection((Spannable) mTextView.getText(), max); 2281 mTextView.replaceText_internal(min, max, content); 2282 2283 if (dragDropIntoItself) { 2284 int dragSourceStart = dragLocalState.start; 2285 int dragSourceEnd = dragLocalState.end; 2286 if (max <= dragSourceStart) { 2287 // Inserting text before selection has shifted positions 2288 final int shift = mTextView.getText().length() - originalLength; 2289 dragSourceStart += shift; 2290 dragSourceEnd += shift; 2291 } 2292 2293 // Delete original selection 2294 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2295 2296 // Make sure we do not leave two adjacent spaces. 2297 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2298 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2299 if (nextCharIdx > prevCharIdx + 1) { 2300 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2301 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2302 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2303 } 2304 } 2305 } 2306 } 2307 2308 public void addSpanWatchers(Spannable text) { 2309 final int textLength = text.length(); 2310 2311 if (mKeyListener != null) { 2312 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2313 } 2314 2315 if (mSpanController == null) { 2316 mSpanController = new SpanController(); 2317 } 2318 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2319 } 2320 2321 /** 2322 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2323 * pop-up should be displayed. 2324 * Also monitors {@link Selection} to call back to the attached input method. 2325 */ 2326 class SpanController implements SpanWatcher { 2327 2328 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2329 2330 private EasyEditPopupWindow mPopupWindow; 2331 2332 private Runnable mHidePopup; 2333 2334 // This function is pure but inner classes can't have static functions 2335 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2336 final Object span) { 2337 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2338 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2339 } 2340 2341 @Override 2342 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2343 if (isNonIntermediateSelectionSpan(text, span)) { 2344 sendUpdateSelection(); 2345 } else if (span instanceof EasyEditSpan) { 2346 if (mPopupWindow == null) { 2347 mPopupWindow = new EasyEditPopupWindow(); 2348 mHidePopup = new Runnable() { 2349 @Override 2350 public void run() { 2351 hide(); 2352 } 2353 }; 2354 } 2355 2356 // Make sure there is only at most one EasyEditSpan in the text 2357 if (mPopupWindow.mEasyEditSpan != null) { 2358 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2359 } 2360 2361 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2362 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2363 @Override 2364 public void onDeleteClick(EasyEditSpan span) { 2365 Editable editable = (Editable) mTextView.getText(); 2366 int start = editable.getSpanStart(span); 2367 int end = editable.getSpanEnd(span); 2368 if (start >= 0 && end >= 0) { 2369 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2370 mTextView.deleteText_internal(start, end); 2371 } 2372 editable.removeSpan(span); 2373 } 2374 }); 2375 2376 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2377 // The window is not visible yet, ignore the text change. 2378 return; 2379 } 2380 2381 if (mTextView.getLayout() == null) { 2382 // The view has not been laid out yet, ignore the text change 2383 return; 2384 } 2385 2386 if (extractedTextModeWillBeStarted()) { 2387 // The input is in extract mode. Do not handle the easy edit in 2388 // the original TextView, as the ExtractEditText will do 2389 return; 2390 } 2391 2392 mPopupWindow.show(); 2393 mTextView.removeCallbacks(mHidePopup); 2394 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2395 } 2396 } 2397 2398 @Override 2399 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2400 if (isNonIntermediateSelectionSpan(text, span)) { 2401 sendUpdateSelection(); 2402 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2403 hide(); 2404 } 2405 } 2406 2407 @Override 2408 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2409 int newStart, int newEnd) { 2410 if (isNonIntermediateSelectionSpan(text, span)) { 2411 sendUpdateSelection(); 2412 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2413 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2414 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2415 text.removeSpan(easyEditSpan); 2416 } 2417 } 2418 2419 public void hide() { 2420 if (mPopupWindow != null) { 2421 mPopupWindow.hide(); 2422 mTextView.removeCallbacks(mHidePopup); 2423 } 2424 } 2425 2426 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2427 try { 2428 PendingIntent pendingIntent = span.getPendingIntent(); 2429 if (pendingIntent != null) { 2430 Intent intent = new Intent(); 2431 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2432 pendingIntent.send(mTextView.getContext(), 0, intent); 2433 } 2434 } catch (CanceledException e) { 2435 // This should not happen, as we should try to send the intent only once. 2436 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2437 } 2438 } 2439 } 2440 2441 /** 2442 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2443 */ 2444 private interface EasyEditDeleteListener { 2445 2446 /** 2447 * Clicks the delete pop-up. 2448 */ 2449 void onDeleteClick(EasyEditSpan span); 2450 } 2451 2452 /** 2453 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2454 * by {@link SpanController}. 2455 */ 2456 private class EasyEditPopupWindow extends PinnedPopupWindow 2457 implements OnClickListener { 2458 private static final int POPUP_TEXT_LAYOUT = 2459 com.android.internal.R.layout.text_edit_action_popup_text; 2460 private TextView mDeleteTextView; 2461 private EasyEditSpan mEasyEditSpan; 2462 private EasyEditDeleteListener mOnDeleteListener; 2463 2464 @Override 2465 protected void createPopupWindow() { 2466 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2467 com.android.internal.R.attr.textSelectHandleWindowStyle); 2468 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2469 mPopupWindow.setClippingEnabled(true); 2470 } 2471 2472 @Override 2473 protected void initContentView() { 2474 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2475 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2476 mContentView = linearLayout; 2477 mContentView.setBackgroundResource( 2478 com.android.internal.R.drawable.text_edit_side_paste_window); 2479 2480 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2481 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2482 2483 LayoutParams wrapContent = new LayoutParams( 2484 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2485 2486 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2487 mDeleteTextView.setLayoutParams(wrapContent); 2488 mDeleteTextView.setText(com.android.internal.R.string.delete); 2489 mDeleteTextView.setOnClickListener(this); 2490 mContentView.addView(mDeleteTextView); 2491 } 2492 2493 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2494 mEasyEditSpan = easyEditSpan; 2495 } 2496 2497 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2498 mOnDeleteListener = listener; 2499 } 2500 2501 @Override 2502 public void onClick(View view) { 2503 if (view == mDeleteTextView 2504 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2505 && mOnDeleteListener != null) { 2506 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2507 } 2508 } 2509 2510 @Override 2511 public void hide() { 2512 if (mEasyEditSpan != null) { 2513 mEasyEditSpan.setDeleteEnabled(false); 2514 } 2515 mOnDeleteListener = null; 2516 super.hide(); 2517 } 2518 2519 @Override 2520 protected int getTextOffset() { 2521 // Place the pop-up at the end of the span 2522 Editable editable = (Editable) mTextView.getText(); 2523 return editable.getSpanEnd(mEasyEditSpan); 2524 } 2525 2526 @Override 2527 protected int getVerticalLocalPosition(int line) { 2528 return mTextView.getLayout().getLineBottom(line); 2529 } 2530 2531 @Override 2532 protected int clipVertically(int positionY) { 2533 // As we display the pop-up below the span, no vertical clipping is required. 2534 return positionY; 2535 } 2536 } 2537 2538 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2539 // 3 handles 2540 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2541 // 1 CursorAnchorInfoNotifier 2542 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2543 private TextViewPositionListener[] mPositionListeners = 2544 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2545 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2546 private boolean mPositionHasChanged = true; 2547 // Absolute position of the TextView with respect to its parent window 2548 private int mPositionX, mPositionY; 2549 private int mNumberOfListeners; 2550 private boolean mScrollHasChanged; 2551 final int[] mTempCoords = new int[2]; 2552 2553 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2554 if (mNumberOfListeners == 0) { 2555 updatePosition(); 2556 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2557 vto.addOnPreDrawListener(this); 2558 } 2559 2560 int emptySlotIndex = -1; 2561 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2562 TextViewPositionListener listener = mPositionListeners[i]; 2563 if (listener == positionListener) { 2564 return; 2565 } else if (emptySlotIndex < 0 && listener == null) { 2566 emptySlotIndex = i; 2567 } 2568 } 2569 2570 mPositionListeners[emptySlotIndex] = positionListener; 2571 mCanMove[emptySlotIndex] = canMove; 2572 mNumberOfListeners++; 2573 } 2574 2575 public void removeSubscriber(TextViewPositionListener positionListener) { 2576 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2577 if (mPositionListeners[i] == positionListener) { 2578 mPositionListeners[i] = null; 2579 mNumberOfListeners--; 2580 break; 2581 } 2582 } 2583 2584 if (mNumberOfListeners == 0) { 2585 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2586 vto.removeOnPreDrawListener(this); 2587 } 2588 } 2589 2590 public int getPositionX() { 2591 return mPositionX; 2592 } 2593 2594 public int getPositionY() { 2595 return mPositionY; 2596 } 2597 2598 @Override 2599 public boolean onPreDraw() { 2600 updatePosition(); 2601 2602 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2603 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2604 TextViewPositionListener positionListener = mPositionListeners[i]; 2605 if (positionListener != null) { 2606 positionListener.updatePosition(mPositionX, mPositionY, 2607 mPositionHasChanged, mScrollHasChanged); 2608 } 2609 } 2610 } 2611 2612 mScrollHasChanged = false; 2613 return true; 2614 } 2615 2616 private void updatePosition() { 2617 mTextView.getLocationInWindow(mTempCoords); 2618 2619 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2620 2621 mPositionX = mTempCoords[0]; 2622 mPositionY = mTempCoords[1]; 2623 } 2624 2625 public void onScrollChanged() { 2626 mScrollHasChanged = true; 2627 } 2628 } 2629 2630 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2631 protected PopupWindow mPopupWindow; 2632 protected ViewGroup mContentView; 2633 int mPositionX, mPositionY; 2634 2635 protected abstract void createPopupWindow(); 2636 protected abstract void initContentView(); 2637 protected abstract int getTextOffset(); 2638 protected abstract int getVerticalLocalPosition(int line); 2639 protected abstract int clipVertically(int positionY); 2640 2641 public PinnedPopupWindow() { 2642 createPopupWindow(); 2643 2644 mPopupWindow.setWindowLayoutType( 2645 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2646 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2647 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2648 2649 initContentView(); 2650 2651 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2652 ViewGroup.LayoutParams.WRAP_CONTENT); 2653 mContentView.setLayoutParams(wrapContent); 2654 2655 mPopupWindow.setContentView(mContentView); 2656 } 2657 2658 public void show() { 2659 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2660 2661 computeLocalPosition(); 2662 2663 final PositionListener positionListener = getPositionListener(); 2664 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2665 } 2666 2667 protected void measureContent() { 2668 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2669 mContentView.measure( 2670 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2671 View.MeasureSpec.AT_MOST), 2672 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2673 View.MeasureSpec.AT_MOST)); 2674 } 2675 2676 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2677 * positioned according to viewportToContentHorizontalOffset. 2678 * 2679 * This method assumes that mContentView has properly been measured from its content. */ 2680 private void computeLocalPosition() { 2681 measureContent(); 2682 final int width = mContentView.getMeasuredWidth(); 2683 final int offset = getTextOffset(); 2684 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2685 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2686 2687 final int line = mTextView.getLayout().getLineForOffset(offset); 2688 mPositionY = getVerticalLocalPosition(line); 2689 mPositionY += mTextView.viewportToContentVerticalOffset(); 2690 } 2691 2692 private void updatePosition(int parentPositionX, int parentPositionY) { 2693 int positionX = parentPositionX + mPositionX; 2694 int positionY = parentPositionY + mPositionY; 2695 2696 positionY = clipVertically(positionY); 2697 2698 // Horizontal clipping 2699 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2700 final int width = mContentView.getMeasuredWidth(); 2701 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2702 positionX = Math.max(0, positionX); 2703 2704 if (isShowing()) { 2705 mPopupWindow.update(positionX, positionY, -1, -1); 2706 } else { 2707 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2708 positionX, positionY); 2709 } 2710 } 2711 2712 public void hide() { 2713 mPopupWindow.dismiss(); 2714 getPositionListener().removeSubscriber(this); 2715 } 2716 2717 @Override 2718 public void updatePosition(int parentPositionX, int parentPositionY, 2719 boolean parentPositionChanged, boolean parentScrolled) { 2720 // Either parentPositionChanged or parentScrolled is true, check if still visible 2721 if (isShowing() && isOffsetVisible(getTextOffset())) { 2722 if (parentScrolled) computeLocalPosition(); 2723 updatePosition(parentPositionX, parentPositionY); 2724 } else { 2725 hide(); 2726 } 2727 } 2728 2729 public boolean isShowing() { 2730 return mPopupWindow.isShowing(); 2731 } 2732 } 2733 2734 @VisibleForTesting 2735 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2736 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2737 2738 // Key of intent extras for inserting new word into user dictionary. 2739 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 2740 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 2741 2742 private SuggestionInfo[] mSuggestionInfos; 2743 private int mNumberOfSuggestions; 2744 private boolean mCursorWasVisibleBeforeSuggestions; 2745 private boolean mIsShowingUp = false; 2746 private SuggestionAdapter mSuggestionsAdapter; 2747 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2748 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2749 private final TextAppearanceSpan mHighlightSpan = new TextAppearanceSpan( 2750 mTextView.getContext(), mTextView.mTextEditSuggestionHighlightStyle); 2751 private TextView mAddToDictionaryButton; 2752 private TextView mDeleteButton; 2753 private SuggestionSpan mMisspelledSpan; 2754 2755 private class CustomPopupWindow extends PopupWindow { 2756 public CustomPopupWindow(Context context, int defStyleAttr) { 2757 super(context, null, defStyleAttr); 2758 } 2759 2760 @Override 2761 public void dismiss() { 2762 super.dismiss(); 2763 2764 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2765 2766 // Safe cast since show() checks that mTextView.getText() is an Editable 2767 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2768 2769 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2770 if (hasInsertionController()) { 2771 getInsertionController().show(); 2772 } 2773 } 2774 } 2775 2776 public SuggestionsPopupWindow() { 2777 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2778 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2779 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2780 } 2781 2782 @Override 2783 protected void createPopupWindow() { 2784 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2785 com.android.internal.R.attr.textSuggestionsWindowStyle); 2786 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2787 mPopupWindow.setFocusable(true); 2788 mPopupWindow.setClippingEnabled(false); 2789 } 2790 2791 @Override 2792 protected void initContentView() { 2793 final LayoutInflater inflater = (LayoutInflater) mTextView.getContext(). 2794 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2795 final LinearLayout linearLayout = (LinearLayout) inflater.inflate( 2796 mTextView.mTextEditSuggestionContainerLayout, null); 2797 2798 final ListView suggestionListView = (ListView) linearLayout.findViewById( 2799 com.android.internal.R.id.suggestionContainer); 2800 2801 mSuggestionsAdapter = new SuggestionAdapter(); 2802 suggestionListView.setAdapter(mSuggestionsAdapter); 2803 suggestionListView.setOnItemClickListener(this); 2804 2805 // Inflate the suggestion items once and for all. 2806 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 2807 for (int i = 0; i < mSuggestionInfos.length; i++) { 2808 mSuggestionInfos[i] = new SuggestionInfo(); 2809 } 2810 2811 mContentView = linearLayout; 2812 2813 mAddToDictionaryButton = (TextView) linearLayout.findViewById( 2814 com.android.internal.R.id.addToDictionaryButton); 2815 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 2816 public void onClick(View v) { 2817 final Editable editable = (Editable) mTextView.getText(); 2818 final int spanStart = editable.getSpanStart(mMisspelledSpan); 2819 final int spanEnd = editable.getSpanEnd(mMisspelledSpan); 2820 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2821 2822 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2823 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 2824 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 2825 mTextView.getTextServicesLocale().toString()); 2826 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2827 mTextView.getContext().startActivity(intent); 2828 // There is no way to know if the word was indeed added. Re-check. 2829 // TODO The ExtractEditText should remove the span in the original text instead 2830 editable.removeSpan(mMisspelledSpan); 2831 Selection.setSelection(editable, spanEnd); 2832 updateSpellCheckSpans(spanStart, spanEnd, false); 2833 hideWithCleanUp(); 2834 } 2835 }); 2836 2837 mDeleteButton = (TextView) linearLayout.findViewById( 2838 com.android.internal.R.id.deleteButton); 2839 mDeleteButton.setOnClickListener(new View.OnClickListener() { 2840 public void onClick(View v) { 2841 final Editable editable = (Editable) mTextView.getText(); 2842 2843 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2844 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2845 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2846 // Do not leave two adjacent spaces after deletion, or one at beginning of 2847 // text 2848 if (spanUnionEnd < editable.length() && 2849 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2850 (spanUnionStart == 0 || 2851 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2852 spanUnionEnd = spanUnionEnd + 1; 2853 } 2854 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2855 } 2856 hideWithCleanUp(); 2857 } 2858 }); 2859 2860 } 2861 2862 public boolean isShowingUp() { 2863 return mIsShowingUp; 2864 } 2865 2866 public void onParentLostFocus() { 2867 mIsShowingUp = false; 2868 } 2869 2870 private final class SuggestionInfo { 2871 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2872 2873 // the SuggestionSpan that this TextView represents 2874 @Nullable 2875 SuggestionSpan suggestionSpan; 2876 2877 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2878 2879 @Nullable 2880 final SpannableStringBuilder text = new SpannableStringBuilder(); 2881 2882 void clear() { 2883 suggestionSpan = null; 2884 text.clear(); 2885 } 2886 } 2887 2888 private class SuggestionAdapter extends BaseAdapter { 2889 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2890 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2891 2892 @Override 2893 public int getCount() { 2894 return mNumberOfSuggestions; 2895 } 2896 2897 @Override 2898 public Object getItem(int position) { 2899 return mSuggestionInfos[position]; 2900 } 2901 2902 @Override 2903 public long getItemId(int position) { 2904 return position; 2905 } 2906 2907 @Override 2908 public View getView(int position, View convertView, ViewGroup parent) { 2909 TextView textView = (TextView) convertView; 2910 2911 if (textView == null) { 2912 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2913 parent, false); 2914 } 2915 2916 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2917 textView.setText(suggestionInfo.text); 2918 return textView; 2919 } 2920 } 2921 2922 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2923 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2924 final int flag1 = span1.getFlags(); 2925 final int flag2 = span2.getFlags(); 2926 if (flag1 != flag2) { 2927 // The order here should match what is used in updateDrawState 2928 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2929 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2930 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2931 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2932 if (easy1 && !misspelled1) return -1; 2933 if (easy2 && !misspelled2) return 1; 2934 if (misspelled1) return -1; 2935 if (misspelled2) return 1; 2936 } 2937 2938 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2939 } 2940 } 2941 2942 /** 2943 * Returns the suggestion spans that cover the current cursor position. The suggestion 2944 * spans are sorted according to the length of text that they are attached to. 2945 */ 2946 private SuggestionSpan[] getSuggestionSpans() { 2947 int pos = mTextView.getSelectionStart(); 2948 Spannable spannable = (Spannable) mTextView.getText(); 2949 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2950 2951 mSpansLengths.clear(); 2952 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2953 int start = spannable.getSpanStart(suggestionSpan); 2954 int end = spannable.getSpanEnd(suggestionSpan); 2955 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2956 } 2957 2958 // The suggestions are sorted according to their types (easy correction first, then 2959 // misspelled) and to the length of the text that they cover (shorter first). 2960 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2961 mSpansLengths.clear(); 2962 2963 return suggestionSpans; 2964 } 2965 2966 @VisibleForTesting 2967 public ViewGroup getContentViewForTesting() { 2968 return mContentView; 2969 } 2970 2971 @Override 2972 public void show() { 2973 if (!(mTextView.getText() instanceof Editable)) return; 2974 2975 if (updateSuggestions()) { 2976 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2977 mTextView.setCursorVisible(false); 2978 mIsShowingUp = true; 2979 super.show(); 2980 } 2981 } 2982 2983 @Override 2984 protected void measureContent() { 2985 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2986 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2987 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2988 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2989 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2990 2991 int width = 0; 2992 View view = null; 2993 for (int i = 0; i < mNumberOfSuggestions; i++) { 2994 view = mSuggestionsAdapter.getView(i, view, mContentView); 2995 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2996 view.measure(horizontalMeasure, verticalMeasure); 2997 width = Math.max(width, view.getMeasuredWidth()); 2998 } 2999 3000 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3001 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3002 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3003 } 3004 3005 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3006 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3007 3008 // Enforce the width based on actual text widths 3009 mContentView.measure( 3010 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3011 verticalMeasure); 3012 3013 Drawable popupBackground = mPopupWindow.getBackground(); 3014 if (popupBackground != null) { 3015 if (mTempRect == null) mTempRect = new Rect(); 3016 popupBackground.getPadding(mTempRect); 3017 width += mTempRect.left + mTempRect.right; 3018 } 3019 mPopupWindow.setWidth(width); 3020 } 3021 3022 @Override 3023 protected int getTextOffset() { 3024 return mTextView.getSelectionStart(); 3025 } 3026 3027 @Override 3028 protected int getVerticalLocalPosition(int line) { 3029 return mTextView.getLayout().getLineBottom(line); 3030 } 3031 3032 @Override 3033 protected int clipVertically(int positionY) { 3034 final int height = mContentView.getMeasuredHeight(); 3035 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3036 return Math.min(positionY, displayMetrics.heightPixels - height); 3037 } 3038 3039 private void hideWithCleanUp() { 3040 for (final SuggestionInfo info : mSuggestionInfos) { 3041 info.clear(); 3042 } 3043 mMisspelledSpan = null; 3044 hide(); 3045 } 3046 3047 private boolean updateSuggestions() { 3048 Spannable spannable = (Spannable) mTextView.getText(); 3049 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 3050 3051 final int nbSpans = suggestionSpans.length; 3052 // Suggestions are shown after a delay: the underlying spans may have been removed 3053 if (nbSpans == 0) return false; 3054 3055 mNumberOfSuggestions = 0; 3056 int spanUnionStart = mTextView.getText().length(); 3057 int spanUnionEnd = 0; 3058 3059 mMisspelledSpan = null; 3060 int underlineColor = 0; 3061 3062 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 3063 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 3064 final int spanStart = spannable.getSpanStart(suggestionSpan); 3065 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3066 spanUnionStart = Math.min(spanStart, spanUnionStart); 3067 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 3068 3069 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3070 mMisspelledSpan = suggestionSpan; 3071 } 3072 3073 // The first span dictates the background color of the highlighted text 3074 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 3075 3076 String[] suggestions = suggestionSpan.getSuggestions(); 3077 int nbSuggestions = suggestions.length; 3078 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3079 String suggestion = suggestions[suggestionIndex]; 3080 3081 boolean suggestionIsDuplicate = false; 3082 for (int i = 0; i < mNumberOfSuggestions; i++) { 3083 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 3084 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 3085 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 3086 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 3087 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3088 suggestionIsDuplicate = true; 3089 break; 3090 } 3091 } 3092 } 3093 3094 if (!suggestionIsDuplicate) { 3095 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 3096 suggestionInfo.suggestionSpan = suggestionSpan; 3097 suggestionInfo.suggestionIndex = suggestionIndex; 3098 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 3099 3100 mNumberOfSuggestions++; 3101 3102 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 3103 // Also end outer for loop 3104 spanIndex = nbSpans; 3105 break; 3106 } 3107 } 3108 } 3109 } 3110 3111 for (int i = 0; i < mNumberOfSuggestions; i++) { 3112 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3113 } 3114 3115 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3116 int addToDictionaryButtonVisibility = View.GONE; 3117 if (mMisspelledSpan != null) { 3118 final int misspelledStart = spannable.getSpanStart(mMisspelledSpan); 3119 final int misspelledEnd = spannable.getSpanEnd(mMisspelledSpan); 3120 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 3121 addToDictionaryButtonVisibility = View.VISIBLE; 3122 } 3123 } 3124 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3125 3126 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3127 if (underlineColor == 0) { 3128 // Fallback on the default highlight color when the first span does not provide one 3129 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3130 } else { 3131 final float BACKGROUND_TRANSPARENCY = 0.4f; 3132 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3133 mSuggestionRangeSpan.setBackgroundColor( 3134 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3135 } 3136 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3137 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3138 3139 mSuggestionsAdapter.notifyDataSetChanged(); 3140 return true; 3141 } 3142 3143 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3144 int unionEnd) { 3145 final Spannable text = (Spannable) mTextView.getText(); 3146 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 3147 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 3148 3149 // Adjust the start/end of the suggestion span 3150 suggestionInfo.suggestionStart = spanStart - unionStart; 3151 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 3152 + suggestionInfo.text.length(); 3153 3154 suggestionInfo.text.setSpan(mHighlightSpan, 0, suggestionInfo.text.length(), 3155 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3156 3157 // Add the text before and after the span. 3158 final String textAsString = text.toString(); 3159 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 3160 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 3161 } 3162 3163 @Override 3164 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3165 Editable editable = (Editable) mTextView.getText(); 3166 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3167 3168 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 3169 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 3170 if (spanStart < 0 || spanEnd <= spanStart) { 3171 // Span has been removed 3172 hideWithCleanUp(); 3173 return; 3174 } 3175 3176 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3177 3178 // SuggestionSpans are removed by replace: save them before 3179 final SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 3180 SuggestionSpan.class); 3181 final int length = suggestionSpans.length; 3182 final int[] suggestionSpansStarts = new int[length]; 3183 final int[] suggestionSpansEnds = new int[length]; 3184 final int[] suggestionSpansFlags = new int[length]; 3185 for (int i = 0; i < length; i++) { 3186 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 3187 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 3188 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 3189 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 3190 3191 // Remove potential misspelled flags 3192 int suggestionSpanFlags = suggestionSpan.getFlags(); 3193 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 3194 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 3195 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 3196 suggestionSpan.setFlags(suggestionSpanFlags); 3197 } 3198 } 3199 3200 final int suggestionStart = suggestionInfo.suggestionStart; 3201 final int suggestionEnd = suggestionInfo.suggestionEnd; 3202 final String suggestion = suggestionInfo.text.subSequence( 3203 suggestionStart, suggestionEnd).toString(); 3204 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 3205 3206 // Notify source IME of the suggestion pick. Do this before 3207 // swaping texts. 3208 suggestionInfo.suggestionSpan.notifySelection( 3209 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 3210 3211 // Swap text content between actual text and Suggestion span 3212 final String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 3213 suggestions[suggestionInfo.suggestionIndex] = originalText; 3214 3215 // Restore previous SuggestionSpans 3216 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 3217 for (int i = 0; i < length; i++) { 3218 // Only spans that include the modified region make sense after replacement 3219 // Spans partially included in the replaced region are removed, there is no 3220 // way to assign them a valid range after replacement 3221 if (suggestionSpansStarts[i] <= spanStart && 3222 suggestionSpansEnds[i] >= spanEnd) { 3223 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 3224 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 3225 } 3226 } 3227 3228 // Move cursor at the end of the replaced word 3229 final int newCursorPosition = spanEnd + lengthDifference; 3230 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 3231 hideWithCleanUp(); 3232 } 3233 } 3234 3235 /** 3236 * An ActionMode Callback class that is used to provide actions while in text insertion or 3237 * selection mode. 3238 * 3239 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3240 * actions, depending on which of these this TextView supports and the current selection. 3241 */ 3242 private class TextActionModeCallback extends ActionMode.Callback2 { 3243 private final Path mSelectionPath = new Path(); 3244 private final RectF mSelectionBounds = new RectF(); 3245 private final boolean mHasSelection; 3246 3247 private int mHandleHeight; 3248 3249 public TextActionModeCallback(boolean hasSelection) { 3250 mHasSelection = hasSelection; 3251 if (mHasSelection) { 3252 SelectionModifierCursorController selectionController = getSelectionController(); 3253 if (selectionController.mStartHandle == null) { 3254 // As these are for initializing selectionController, hide() must be called. 3255 selectionController.initDrawables(); 3256 selectionController.initHandles(); 3257 selectionController.hide(); 3258 } 3259 mHandleHeight = Math.max( 3260 mSelectHandleLeft.getMinimumHeight(), 3261 mSelectHandleRight.getMinimumHeight()); 3262 } else { 3263 InsertionPointCursorController insertionController = getInsertionController(); 3264 if (insertionController != null) { 3265 insertionController.getHandle(); 3266 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3267 } 3268 } 3269 } 3270 3271 @Override 3272 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3273 mode.setTitle(null); 3274 mode.setSubtitle(null); 3275 mode.setTitleOptionalHint(true); 3276 populateMenuWithItems(menu); 3277 3278 Callback customCallback = getCustomCallback(); 3279 if (customCallback != null) { 3280 if (!customCallback.onCreateActionMode(mode, menu)) { 3281 // The custom mode can choose to cancel the action mode, dismiss selection. 3282 Selection.setSelection((Spannable) mTextView.getText(), 3283 mTextView.getSelectionEnd()); 3284 return false; 3285 } 3286 } 3287 3288 if (mTextView.canProcessText()) { 3289 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3290 } 3291 3292 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3293 mTextView.setHasTransientState(true); 3294 return true; 3295 } else { 3296 return false; 3297 } 3298 } 3299 3300 private Callback getCustomCallback() { 3301 return mHasSelection 3302 ? mCustomSelectionActionModeCallback 3303 : mCustomInsertionActionModeCallback; 3304 } 3305 3306 private void populateMenuWithItems(Menu menu) { 3307 if (mTextView.canCut()) { 3308 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3309 com.android.internal.R.string.cut). 3310 setAlphabeticShortcut('x'). 3311 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3312 } 3313 3314 if (mTextView.canCopy()) { 3315 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3316 com.android.internal.R.string.copy). 3317 setAlphabeticShortcut('c'). 3318 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3319 } 3320 3321 if (mTextView.canPaste()) { 3322 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3323 com.android.internal.R.string.paste). 3324 setAlphabeticShortcut('v'). 3325 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3326 } 3327 3328 if (mTextView.canShare()) { 3329 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3330 com.android.internal.R.string.share). 3331 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3332 } 3333 3334 updateSelectAllItem(menu); 3335 updateReplaceItem(menu); 3336 } 3337 3338 @Override 3339 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3340 updateSelectAllItem(menu); 3341 updateReplaceItem(menu); 3342 3343 Callback customCallback = getCustomCallback(); 3344 if (customCallback != null) { 3345 return customCallback.onPrepareActionMode(mode, menu); 3346 } 3347 return true; 3348 } 3349 3350 private void updateSelectAllItem(Menu menu) { 3351 boolean canSelectAll = mTextView.canSelectAllText(); 3352 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3353 if (canSelectAll && !selectAllItemExists) { 3354 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3355 com.android.internal.R.string.selectAll) 3356 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3357 } else if (!canSelectAll && selectAllItemExists) { 3358 menu.removeItem(TextView.ID_SELECT_ALL); 3359 } 3360 } 3361 3362 private void updateReplaceItem(Menu menu) { 3363 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions() 3364 && !(mTextView.isInExtractedMode() && mTextView.hasSelection()); 3365 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3366 if (canReplace && !replaceItemExists) { 3367 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3368 com.android.internal.R.string.replace) 3369 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3370 } else if (!canReplace && replaceItemExists) { 3371 menu.removeItem(TextView.ID_REPLACE); 3372 } 3373 } 3374 3375 @Override 3376 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3377 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 3378 return true; 3379 } 3380 Callback customCallback = getCustomCallback(); 3381 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3382 return true; 3383 } 3384 return mTextView.onTextContextMenuItem(item.getItemId()); 3385 } 3386 3387 @Override 3388 public void onDestroyActionMode(ActionMode mode) { 3389 Callback customCallback = getCustomCallback(); 3390 if (customCallback != null) { 3391 customCallback.onDestroyActionMode(mode); 3392 } 3393 3394 /* 3395 * If we're ending this mode because we're detaching from a window, 3396 * we still have selection state to preserve. Don't clear it, we'll 3397 * bring back the selection mode when (if) we get reattached. 3398 */ 3399 if (!mPreserveDetachedSelection) { 3400 Selection.setSelection((Spannable) mTextView.getText(), 3401 mTextView.getSelectionEnd()); 3402 mTextView.setHasTransientState(false); 3403 } 3404 3405 if (mSelectionModifierCursorController != null) { 3406 mSelectionModifierCursorController.hide(); 3407 } 3408 3409 mTextActionMode = null; 3410 } 3411 3412 @Override 3413 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3414 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3415 super.onGetContentRect(mode, view, outRect); 3416 return; 3417 } 3418 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3419 // We have a selection. 3420 mSelectionPath.reset(); 3421 mTextView.getLayout().getSelectionPath( 3422 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3423 mSelectionPath.computeBounds(mSelectionBounds, true); 3424 mSelectionBounds.bottom += mHandleHeight; 3425 } else if (mCursorCount == 2) { 3426 // We have a split cursor. In this case, we take the rectangle that includes both 3427 // parts of the cursor to ensure we don't obscure either of them. 3428 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3429 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3430 mSelectionBounds.set( 3431 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3432 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3433 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3434 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3435 + mHandleHeight); 3436 } else { 3437 // We have a single cursor. 3438 Layout layout = getActiveLayout(); 3439 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 3440 float primaryHorizontal = 3441 layout.getPrimaryHorizontal(mTextView.getSelectionStart()); 3442 mSelectionBounds.set( 3443 primaryHorizontal, 3444 layout.getLineTop(line), 3445 primaryHorizontal, 3446 layout.getLineTop(line + 1) + mHandleHeight); 3447 } 3448 // Take TextView's padding and scroll into account. 3449 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3450 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3451 outRect.set( 3452 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3453 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3454 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3455 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3456 } 3457 } 3458 3459 /** 3460 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3461 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3462 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3463 */ 3464 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3465 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3466 final int[] mTmpIntOffset = new int[2]; 3467 final Matrix mViewToScreenMatrix = new Matrix(); 3468 3469 @Override 3470 public void updatePosition(int parentPositionX, int parentPositionY, 3471 boolean parentPositionChanged, boolean parentScrolled) { 3472 final InputMethodState ims = mInputMethodState; 3473 if (ims == null || ims.mBatchEditNesting > 0) { 3474 return; 3475 } 3476 final InputMethodManager imm = InputMethodManager.peekInstance(); 3477 if (null == imm) { 3478 return; 3479 } 3480 if (!imm.isActive(mTextView)) { 3481 return; 3482 } 3483 // Skip if the IME has not requested the cursor/anchor position. 3484 if (!imm.isCursorAnchorInfoEnabled()) { 3485 return; 3486 } 3487 Layout layout = mTextView.getLayout(); 3488 if (layout == null) { 3489 return; 3490 } 3491 3492 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3493 builder.reset(); 3494 3495 final int selectionStart = mTextView.getSelectionStart(); 3496 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3497 3498 // Construct transformation matrix from view local coordinates to screen coordinates. 3499 mViewToScreenMatrix.set(mTextView.getMatrix()); 3500 mTextView.getLocationOnScreen(mTmpIntOffset); 3501 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3502 builder.setMatrix(mViewToScreenMatrix); 3503 3504 final float viewportToContentHorizontalOffset = 3505 mTextView.viewportToContentHorizontalOffset(); 3506 final float viewportToContentVerticalOffset = 3507 mTextView.viewportToContentVerticalOffset(); 3508 3509 final CharSequence text = mTextView.getText(); 3510 if (text instanceof Spannable) { 3511 final Spannable sp = (Spannable) text; 3512 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3513 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3514 if (composingTextEnd < composingTextStart) { 3515 final int temp = composingTextEnd; 3516 composingTextEnd = composingTextStart; 3517 composingTextStart = temp; 3518 } 3519 final boolean hasComposingText = 3520 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3521 if (hasComposingText) { 3522 final CharSequence composingText = text.subSequence(composingTextStart, 3523 composingTextEnd); 3524 builder.setComposingText(composingTextStart, composingText); 3525 3526 final int minLine = layout.getLineForOffset(composingTextStart); 3527 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3528 for (int line = minLine; line <= maxLine; ++line) { 3529 final int lineStart = layout.getLineStart(line); 3530 final int lineEnd = layout.getLineEnd(line); 3531 final int offsetStart = Math.max(lineStart, composingTextStart); 3532 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3533 final boolean ltrLine = 3534 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3535 final float[] widths = new float[offsetEnd - offsetStart]; 3536 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3537 final float top = layout.getLineTop(line); 3538 final float bottom = layout.getLineBottom(line); 3539 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3540 final float charWidth = widths[offset - offsetStart]; 3541 final boolean isRtl = layout.isRtlCharAt(offset); 3542 final float primary = layout.getPrimaryHorizontal(offset); 3543 final float secondary = layout.getSecondaryHorizontal(offset); 3544 // TODO: This doesn't work perfectly for text with custom styles and 3545 // TAB chars. 3546 final float left; 3547 final float right; 3548 if (ltrLine) { 3549 if (isRtl) { 3550 left = secondary - charWidth; 3551 right = secondary; 3552 } else { 3553 left = primary; 3554 right = primary + charWidth; 3555 } 3556 } else { 3557 if (!isRtl) { 3558 left = secondary; 3559 right = secondary + charWidth; 3560 } else { 3561 left = primary - charWidth; 3562 right = primary; 3563 } 3564 } 3565 // TODO: Check top-right and bottom-left as well. 3566 final float localLeft = left + viewportToContentHorizontalOffset; 3567 final float localRight = right + viewportToContentHorizontalOffset; 3568 final float localTop = top + viewportToContentVerticalOffset; 3569 final float localBottom = bottom + viewportToContentVerticalOffset; 3570 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3571 final boolean isBottomRightVisible = 3572 isPositionVisible(localRight, localBottom); 3573 int characterBoundsFlags = 0; 3574 if (isTopLeftVisible || isBottomRightVisible) { 3575 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3576 } 3577 if (!isTopLeftVisible || !isBottomRightVisible) { 3578 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3579 } 3580 if (isRtl) { 3581 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3582 } 3583 // Here offset is the index in Java chars. 3584 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3585 localBottom, characterBoundsFlags); 3586 } 3587 } 3588 } 3589 } 3590 3591 // Treat selectionStart as the insertion point. 3592 if (0 <= selectionStart) { 3593 final int offset = selectionStart; 3594 final int line = layout.getLineForOffset(offset); 3595 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3596 + viewportToContentHorizontalOffset; 3597 final float insertionMarkerTop = layout.getLineTop(line) 3598 + viewportToContentVerticalOffset; 3599 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3600 + viewportToContentVerticalOffset; 3601 final float insertionMarkerBottom = layout.getLineBottom(line) 3602 + viewportToContentVerticalOffset; 3603 final boolean isTopVisible = 3604 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3605 final boolean isBottomVisible = 3606 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3607 int insertionMarkerFlags = 0; 3608 if (isTopVisible || isBottomVisible) { 3609 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3610 } 3611 if (!isTopVisible || !isBottomVisible) { 3612 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3613 } 3614 if (layout.isRtlCharAt(offset)) { 3615 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3616 } 3617 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3618 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3619 } 3620 3621 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3622 } 3623 } 3624 3625 @VisibleForTesting 3626 public abstract class HandleView extends View implements TextViewPositionListener { 3627 protected Drawable mDrawable; 3628 protected Drawable mDrawableLtr; 3629 protected Drawable mDrawableRtl; 3630 private final PopupWindow mContainer; 3631 // Position with respect to the parent TextView 3632 private int mPositionX, mPositionY; 3633 private boolean mIsDragging; 3634 // Offset from touch position to mPosition 3635 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3636 protected int mHotspotX; 3637 protected int mHorizontalGravity; 3638 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3639 private float mTouchOffsetY; 3640 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3641 private float mIdealVerticalOffset; 3642 // Parent's (TextView) previous position in window 3643 private int mLastParentX, mLastParentY; 3644 // Previous text character offset 3645 protected int mPreviousOffset = -1; 3646 // Previous text character offset 3647 private boolean mPositionHasChanged = true; 3648 // Minimum touch target size for handles 3649 private int mMinSize; 3650 // Indicates the line of text that the handle is on. 3651 protected int mPrevLine = UNSET_LINE; 3652 // Indicates the line of text that the user was touching. This can differ from mPrevLine 3653 // when selecting text when the handles jump to the end / start of words which may be on 3654 // a different line. 3655 protected int mPreviousLineTouched = UNSET_LINE; 3656 3657 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 3658 super(mTextView.getContext()); 3659 setId(id); 3660 mContainer = new PopupWindow(mTextView.getContext(), null, 3661 com.android.internal.R.attr.textSelectHandleWindowStyle); 3662 mContainer.setSplitTouchEnabled(true); 3663 mContainer.setClippingEnabled(false); 3664 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3665 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3666 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3667 mContainer.setContentView(this); 3668 3669 mDrawableLtr = drawableLtr; 3670 mDrawableRtl = drawableRtl; 3671 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3672 com.android.internal.R.dimen.text_handle_min_size); 3673 3674 updateDrawable(); 3675 3676 final int handleHeight = getPreferredHeight(); 3677 mTouchOffsetY = -0.3f * handleHeight; 3678 mIdealVerticalOffset = 0.7f * handleHeight; 3679 } 3680 3681 public float getIdealVerticalOffset() { 3682 return mIdealVerticalOffset; 3683 } 3684 3685 protected void updateDrawable() { 3686 if (mIsDragging) { 3687 // Don't update drawable during dragging. 3688 return; 3689 } 3690 final int offset = getCurrentCursorOffset(); 3691 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3692 final Drawable oldDrawable = mDrawable; 3693 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3694 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3695 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3696 final Layout layout = mTextView.getLayout(); 3697 if (layout != null && oldDrawable != mDrawable && isShowing()) { 3698 // Update popup window position. 3699 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3700 getHorizontalOffset() + getCursorOffset()); 3701 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3702 mPositionHasChanged = true; 3703 updatePosition(mLastParentX, mLastParentY, false, false); 3704 postInvalidate(); 3705 } 3706 } 3707 3708 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3709 protected abstract int getHorizontalGravity(boolean isRtlRun); 3710 3711 // Touch-up filter: number of previous positions remembered 3712 private static final int HISTORY_SIZE = 5; 3713 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3714 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3715 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3716 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3717 private int mPreviousOffsetIndex = 0; 3718 private int mNumberPreviousOffsets = 0; 3719 3720 private void startTouchUpFilter(int offset) { 3721 mNumberPreviousOffsets = 0; 3722 addPositionToTouchUpFilter(offset); 3723 } 3724 3725 private void addPositionToTouchUpFilter(int offset) { 3726 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3727 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3728 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3729 mNumberPreviousOffsets++; 3730 } 3731 3732 private void filterOnTouchUp() { 3733 final long now = SystemClock.uptimeMillis(); 3734 int i = 0; 3735 int index = mPreviousOffsetIndex; 3736 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3737 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3738 i++; 3739 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3740 } 3741 3742 if (i > 0 && i < iMax && 3743 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3744 positionAtCursorOffset(mPreviousOffsets[index], false); 3745 } 3746 } 3747 3748 public boolean offsetHasBeenChanged() { 3749 return mNumberPreviousOffsets > 1; 3750 } 3751 3752 @Override 3753 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3754 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3755 } 3756 3757 private int getPreferredWidth() { 3758 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3759 } 3760 3761 private int getPreferredHeight() { 3762 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3763 } 3764 3765 public void show() { 3766 if (isShowing()) return; 3767 3768 getPositionListener().addSubscriber(this, true /* local position may change */); 3769 3770 // Make sure the offset is always considered new, even when focusing at same position 3771 mPreviousOffset = -1; 3772 positionAtCursorOffset(getCurrentCursorOffset(), false); 3773 } 3774 3775 protected void dismiss() { 3776 mIsDragging = false; 3777 mContainer.dismiss(); 3778 onDetached(); 3779 } 3780 3781 public void hide() { 3782 dismiss(); 3783 3784 getPositionListener().removeSubscriber(this); 3785 } 3786 3787 public boolean isShowing() { 3788 return mContainer.isShowing(); 3789 } 3790 3791 private boolean isVisible() { 3792 // Always show a dragging handle. 3793 if (mIsDragging) { 3794 return true; 3795 } 3796 3797 if (mTextView.isInBatchEditMode()) { 3798 return false; 3799 } 3800 3801 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3802 } 3803 3804 public abstract int getCurrentCursorOffset(); 3805 3806 protected abstract void updateSelection(int offset); 3807 3808 public abstract void updatePosition(float x, float y); 3809 3810 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3811 // A HandleView relies on the layout, which may be nulled by external methods 3812 Layout layout = mTextView.getLayout(); 3813 if (layout == null) { 3814 // Will update controllers' state, hiding them and stopping selection mode if needed 3815 prepareCursorControllers(); 3816 return; 3817 } 3818 layout = getActiveLayout(); 3819 3820 boolean offsetChanged = offset != mPreviousOffset; 3821 if (offsetChanged || parentScrolled) { 3822 if (offsetChanged) { 3823 updateSelection(offset); 3824 addPositionToTouchUpFilter(offset); 3825 } 3826 final int line = layout.getLineForOffset(offset); 3827 mPrevLine = line; 3828 3829 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3830 getHorizontalOffset() + getCursorOffset()); 3831 mPositionY = layout.getLineBottom(line); 3832 3833 // Take TextView's padding and scroll into account. 3834 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3835 mPositionY += mTextView.viewportToContentVerticalOffset(); 3836 3837 mPreviousOffset = offset; 3838 mPositionHasChanged = true; 3839 } 3840 } 3841 3842 public void updatePosition(int parentPositionX, int parentPositionY, 3843 boolean parentPositionChanged, boolean parentScrolled) { 3844 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3845 if (parentPositionChanged || mPositionHasChanged) { 3846 if (mIsDragging) { 3847 // Update touchToWindow offset in case of parent scrolling while dragging 3848 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3849 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3850 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3851 mLastParentX = parentPositionX; 3852 mLastParentY = parentPositionY; 3853 } 3854 3855 onHandleMoved(); 3856 } 3857 3858 if (isVisible()) { 3859 final int positionX = parentPositionX + mPositionX; 3860 final int positionY = parentPositionY + mPositionY; 3861 if (isShowing()) { 3862 mContainer.update(positionX, positionY, -1, -1); 3863 } else { 3864 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3865 positionX, positionY); 3866 } 3867 } else { 3868 if (isShowing()) { 3869 dismiss(); 3870 } 3871 } 3872 3873 mPositionHasChanged = false; 3874 } 3875 } 3876 3877 @Override 3878 protected void onDraw(Canvas c) { 3879 final int drawWidth = mDrawable.getIntrinsicWidth(); 3880 final int left = getHorizontalOffset(); 3881 3882 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3883 mDrawable.draw(c); 3884 } 3885 3886 private int getHorizontalOffset() { 3887 final int width = getPreferredWidth(); 3888 final int drawWidth = mDrawable.getIntrinsicWidth(); 3889 final int left; 3890 switch (mHorizontalGravity) { 3891 case Gravity.LEFT: 3892 left = 0; 3893 break; 3894 default: 3895 case Gravity.CENTER: 3896 left = (width - drawWidth) / 2; 3897 break; 3898 case Gravity.RIGHT: 3899 left = width - drawWidth; 3900 break; 3901 } 3902 return left; 3903 } 3904 3905 protected int getCursorOffset() { 3906 return 0; 3907 } 3908 3909 @Override 3910 public boolean onTouchEvent(MotionEvent ev) { 3911 updateFloatingToolbarVisibility(ev); 3912 3913 switch (ev.getActionMasked()) { 3914 case MotionEvent.ACTION_DOWN: { 3915 startTouchUpFilter(getCurrentCursorOffset()); 3916 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3917 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3918 3919 final PositionListener positionListener = getPositionListener(); 3920 mLastParentX = positionListener.getPositionX(); 3921 mLastParentY = positionListener.getPositionY(); 3922 mIsDragging = true; 3923 mPreviousLineTouched = UNSET_LINE; 3924 break; 3925 } 3926 3927 case MotionEvent.ACTION_MOVE: { 3928 final float rawX = ev.getRawX(); 3929 final float rawY = ev.getRawY(); 3930 3931 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3932 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3933 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3934 float newVerticalOffset; 3935 if (previousVerticalOffset < mIdealVerticalOffset) { 3936 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3937 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3938 } else { 3939 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3940 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3941 } 3942 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3943 3944 final float newPosX = 3945 rawX - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 3946 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3947 3948 updatePosition(newPosX, newPosY); 3949 break; 3950 } 3951 3952 case MotionEvent.ACTION_UP: 3953 filterOnTouchUp(); 3954 mIsDragging = false; 3955 updateDrawable(); 3956 break; 3957 3958 case MotionEvent.ACTION_CANCEL: 3959 mIsDragging = false; 3960 updateDrawable(); 3961 break; 3962 } 3963 return true; 3964 } 3965 3966 public boolean isDragging() { 3967 return mIsDragging; 3968 } 3969 3970 void onHandleMoved() {} 3971 3972 public void onDetached() {} 3973 } 3974 3975 /** 3976 * Returns the active layout (hint or text layout). Note that the text layout can be null. 3977 */ 3978 private Layout getActiveLayout() { 3979 Layout layout = mTextView.getLayout(); 3980 Layout hintLayout = mTextView.getHintLayout(); 3981 if (TextUtils.isEmpty(layout.getText()) && hintLayout != null && 3982 !TextUtils.isEmpty(hintLayout.getText())) { 3983 layout = hintLayout; 3984 } 3985 return layout; 3986 } 3987 3988 private class InsertionHandleView extends HandleView { 3989 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3990 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3991 3992 // Used to detect taps on the insertion handle, which will affect the insertion action mode 3993 private float mDownPositionX, mDownPositionY; 3994 private Runnable mHider; 3995 3996 public InsertionHandleView(Drawable drawable) { 3997 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 3998 } 3999 4000 @Override 4001 public void show() { 4002 super.show(); 4003 4004 final long durationSinceCutOrCopy = 4005 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4006 4007 // Cancel the single tap delayed runnable. 4008 if (mInsertionActionModeRunnable != null 4009 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4010 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4011 || isCursorInsideEasyCorrectionSpan())) { 4012 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4013 } 4014 4015 // Prepare and schedule the single tap runnable to run exactly after the double tap 4016 // timeout has passed. 4017 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4018 && !isCursorInsideEasyCorrectionSpan() 4019 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4020 if (mTextActionMode == null) { 4021 if (mInsertionActionModeRunnable == null) { 4022 mInsertionActionModeRunnable = new Runnable() { 4023 @Override 4024 public void run() { 4025 startInsertionActionMode(); 4026 } 4027 }; 4028 } 4029 mTextView.postDelayed( 4030 mInsertionActionModeRunnable, 4031 ViewConfiguration.getDoubleTapTimeout() + 1); 4032 } 4033 4034 } 4035 4036 hideAfterDelay(); 4037 } 4038 4039 private void hideAfterDelay() { 4040 if (mHider == null) { 4041 mHider = new Runnable() { 4042 public void run() { 4043 hide(); 4044 } 4045 }; 4046 } else { 4047 removeHiderCallback(); 4048 } 4049 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4050 } 4051 4052 private void removeHiderCallback() { 4053 if (mHider != null) { 4054 mTextView.removeCallbacks(mHider); 4055 } 4056 } 4057 4058 @Override 4059 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4060 return drawable.getIntrinsicWidth() / 2; 4061 } 4062 4063 @Override 4064 protected int getHorizontalGravity(boolean isRtlRun) { 4065 return Gravity.CENTER_HORIZONTAL; 4066 } 4067 4068 @Override 4069 protected int getCursorOffset() { 4070 int offset = super.getCursorOffset(); 4071 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 4072 if (cursor != null) { 4073 cursor.getPadding(mTempRect); 4074 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 4075 } 4076 return offset; 4077 } 4078 4079 @Override 4080 public boolean onTouchEvent(MotionEvent ev) { 4081 final boolean result = super.onTouchEvent(ev); 4082 4083 switch (ev.getActionMasked()) { 4084 case MotionEvent.ACTION_DOWN: 4085 mDownPositionX = ev.getRawX(); 4086 mDownPositionY = ev.getRawY(); 4087 break; 4088 4089 case MotionEvent.ACTION_UP: 4090 if (!offsetHasBeenChanged()) { 4091 final float deltaX = mDownPositionX - ev.getRawX(); 4092 final float deltaY = mDownPositionY - ev.getRawY(); 4093 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4094 4095 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 4096 mTextView.getContext()); 4097 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 4098 4099 if (distanceSquared < touchSlop * touchSlop) { 4100 // Tapping on the handle toggles the insertion action mode. 4101 if (mTextActionMode != null) { 4102 mTextActionMode.finish(); 4103 } else { 4104 startInsertionActionMode(); 4105 } 4106 } 4107 } else { 4108 if (mTextActionMode != null) { 4109 mTextActionMode.invalidateContentRect(); 4110 } 4111 } 4112 hideAfterDelay(); 4113 break; 4114 4115 case MotionEvent.ACTION_CANCEL: 4116 hideAfterDelay(); 4117 break; 4118 4119 default: 4120 break; 4121 } 4122 4123 return result; 4124 } 4125 4126 @Override 4127 public int getCurrentCursorOffset() { 4128 return mTextView.getSelectionStart(); 4129 } 4130 4131 @Override 4132 public void updateSelection(int offset) { 4133 Selection.setSelection((Spannable) mTextView.getText(), offset); 4134 } 4135 4136 @Override 4137 public void updatePosition(float x, float y) { 4138 Layout layout = mTextView.getLayout(); 4139 int offset; 4140 if (layout != null) { 4141 if (mPreviousLineTouched == UNSET_LINE) { 4142 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4143 } 4144 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4145 offset = mTextView.getOffsetAtCoordinate(currLine, x); 4146 mPreviousLineTouched = currLine; 4147 } else { 4148 offset = mTextView.getOffsetForPosition(x, y); 4149 } 4150 positionAtCursorOffset(offset, false); 4151 if (mTextActionMode != null) { 4152 mTextActionMode.invalidate(); 4153 } 4154 } 4155 4156 @Override 4157 void onHandleMoved() { 4158 super.onHandleMoved(); 4159 removeHiderCallback(); 4160 } 4161 4162 @Override 4163 public void onDetached() { 4164 super.onDetached(); 4165 removeHiderCallback(); 4166 } 4167 } 4168 4169 @Retention(RetentionPolicy.SOURCE) 4170 @IntDef({HANDLE_TYPE_SELECTION_START, HANDLE_TYPE_SELECTION_END}) 4171 public @interface HandleType {} 4172 public static final int HANDLE_TYPE_SELECTION_START = 0; 4173 public static final int HANDLE_TYPE_SELECTION_END = 1; 4174 4175 private class SelectionHandleView extends HandleView { 4176 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 4177 // end (HANDLE_TYPE_SELECTION_END). 4178 @HandleType 4179 private final int mHandleType; 4180 // Indicates whether the cursor is making adjustments within a word. 4181 private boolean mInWord = false; 4182 // Difference between touch position and word boundary position. 4183 private float mTouchWordDelta; 4184 // X value of the previous updatePosition call. 4185 private float mPrevX; 4186 // Indicates if the handle has moved a boundary between LTR and RTL text. 4187 private boolean mLanguageDirectionChanged = false; 4188 // Distance from edge of horizontally scrolling text view 4189 // to use to switch to character mode. 4190 private final float mTextViewEdgeSlop; 4191 // Used to save text view location. 4192 private final int[] mTextViewLocation = new int[2]; 4193 4194 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 4195 @HandleType int handleType) { 4196 super(drawableLtr, drawableRtl, id); 4197 mHandleType = handleType; 4198 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 4199 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 4200 } 4201 4202 private boolean isStartHandle() { 4203 return mHandleType == HANDLE_TYPE_SELECTION_START; 4204 } 4205 4206 @Override 4207 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4208 if (isRtlRun == isStartHandle()) { 4209 return drawable.getIntrinsicWidth() / 4; 4210 } else { 4211 return (drawable.getIntrinsicWidth() * 3) / 4; 4212 } 4213 } 4214 4215 @Override 4216 protected int getHorizontalGravity(boolean isRtlRun) { 4217 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 4218 } 4219 4220 @Override 4221 public int getCurrentCursorOffset() { 4222 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 4223 } 4224 4225 @Override 4226 protected void updateSelection(int offset) { 4227 if (isStartHandle()) { 4228 Selection.setSelection((Spannable) mTextView.getText(), offset, 4229 mTextView.getSelectionEnd()); 4230 } else { 4231 Selection.setSelection((Spannable) mTextView.getText(), 4232 mTextView.getSelectionStart(), offset); 4233 } 4234 updateDrawable(); 4235 if (mTextActionMode != null) { 4236 mTextActionMode.invalidate(); 4237 } 4238 } 4239 4240 @Override 4241 public void updatePosition(float x, float y) { 4242 final Layout layout = mTextView.getLayout(); 4243 if (layout == null) { 4244 // HandleView will deal appropriately in positionAtCursorOffset when 4245 // layout is null. 4246 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y)); 4247 return; 4248 } 4249 4250 if (mPreviousLineTouched == UNSET_LINE) { 4251 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 4252 } 4253 4254 boolean positionCursor = false; 4255 final int anotherHandleOffset = 4256 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4257 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 4258 int initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4259 4260 if (isStartHandle() && initialOffset >= anotherHandleOffset 4261 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 4262 // Handles have crossed, bound it to the first selected line and 4263 // adjust by word / char as normal. 4264 currLine = layout.getLineForOffset(anotherHandleOffset); 4265 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4266 } 4267 4268 int offset = initialOffset; 4269 final int wordEnd = getWordEnd(offset); 4270 final int wordStart = getWordStart(offset); 4271 4272 if (mPrevX == UNSET_X_VALUE) { 4273 mPrevX = x; 4274 } 4275 4276 final int currentOffset = getCurrentCursorOffset(); 4277 final boolean rtlAtCurrentOffset = layout.isRtlCharAt(currentOffset); 4278 final boolean atRtl = layout.isRtlCharAt(offset); 4279 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4280 4281 // We can't determine if the user is expanding or shrinking the selection if they're 4282 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4283 // the cursor at the current position. 4284 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 4285 // We're on a boundary or this is the first direction change -- just update 4286 // to the current position. 4287 mLanguageDirectionChanged = true; 4288 mTouchWordDelta = 0.0f; 4289 positionAndAdjustForCrossingHandles(offset); 4290 return; 4291 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4292 // We've just moved past the boundary so update the position. After this we can 4293 // figure out if the user is expanding or shrinking to go by word or character. 4294 positionAndAdjustForCrossingHandles(offset); 4295 mTouchWordDelta = 0.0f; 4296 mLanguageDirectionChanged = false; 4297 return; 4298 } 4299 4300 boolean isExpanding; 4301 final float xDiff = x - mPrevX; 4302 if (isStartHandle()) { 4303 isExpanding = currLine < mPreviousLineTouched; 4304 } else { 4305 isExpanding = currLine > mPreviousLineTouched; 4306 } 4307 if (atRtl == isStartHandle()) { 4308 isExpanding |= xDiff > 0; 4309 } else { 4310 isExpanding |= xDiff < 0; 4311 } 4312 4313 if (mTextView.getHorizontallyScrolling()) { 4314 if (positionNearEdgeOfScrollingView(x, atRtl) 4315 && ((isStartHandle() && mTextView.getScrollX() != 0) 4316 || (!isStartHandle() 4317 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 4318 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 4319 || (!isStartHandle() && offset > currentOffset))) 4320 || !isExpanding)) { 4321 // If we're expanding ensure that the offset is actually expanding compared to 4322 // the current offset, if the handle snapped to the word, the finger position 4323 // may be out of sync and we don't want the selection to jump back. 4324 mTouchWordDelta = 0.0f; 4325 final int nextOffset = (atRtl == isStartHandle()) 4326 ? layout.getOffsetToRightOf(mPreviousOffset) 4327 : layout.getOffsetToLeftOf(mPreviousOffset); 4328 positionAndAdjustForCrossingHandles(nextOffset); 4329 return; 4330 } 4331 } 4332 4333 if (isExpanding) { 4334 // User is increasing the selection. 4335 final boolean snapToWord = !mInWord 4336 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine); 4337 if (snapToWord) { 4338 // Sometimes words can be broken across lines (Chinese, hyphenation). 4339 // We still snap to the word boundary but we only use the letters on the 4340 // current line to determine if the user is far enough into the word to snap. 4341 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 4342 if (layout != null && layout.getLineForOffset(wordBoundary) != currLine) { 4343 wordBoundary = isStartHandle() ? 4344 layout.getLineStart(currLine) : layout.getLineEnd(currLine); 4345 } 4346 final int offsetThresholdToSnap = isStartHandle() 4347 ? wordEnd - ((wordEnd - wordBoundary) / 2) 4348 : wordStart + ((wordBoundary - wordStart) / 2); 4349 if (isStartHandle() 4350 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 4351 // User is far enough into the word or on a different line so we expand by 4352 // word. 4353 offset = wordStart; 4354 } else if (!isStartHandle() 4355 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 4356 // User is far enough into the word or on a different line so we expand by 4357 // word. 4358 offset = wordEnd; 4359 } else { 4360 offset = mPreviousOffset; 4361 } 4362 } 4363 if (layout != null && (isStartHandle() && offset < initialOffset) 4364 || (!isStartHandle() && offset > initialOffset)) { 4365 final float adjustedX = layout.getPrimaryHorizontal(offset); 4366 mTouchWordDelta = 4367 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4368 } else { 4369 mTouchWordDelta = 0.0f; 4370 } 4371 positionCursor = true; 4372 } else { 4373 final int adjustedOffset = 4374 mTextView.getOffsetAtCoordinate(currLine, x - mTouchWordDelta); 4375 final boolean shrinking = isStartHandle() 4376 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 4377 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 4378 if (shrinking) { 4379 // User is shrinking the selection. 4380 if (currLine != mPrevLine) { 4381 // We're on a different line, so we'll snap to word boundaries. 4382 offset = isStartHandle() ? wordStart : wordEnd; 4383 if (layout != null && (isStartHandle() && offset < initialOffset) 4384 || (!isStartHandle() && offset > initialOffset)) { 4385 final float adjustedX = layout.getPrimaryHorizontal(offset); 4386 mTouchWordDelta = 4387 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4388 } else { 4389 mTouchWordDelta = 0.0f; 4390 } 4391 } else { 4392 offset = adjustedOffset; 4393 } 4394 positionCursor = true; 4395 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 4396 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 4397 // Handle has jumped to the word boundary, and the user is moving 4398 // their finger towards the handle, the delta should be updated. 4399 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) - 4400 layout.getPrimaryHorizontal(mPreviousOffset); 4401 } 4402 } 4403 4404 if (positionCursor) { 4405 mPreviousLineTouched = currLine; 4406 positionAndAdjustForCrossingHandles(offset); 4407 } 4408 mPrevX = x; 4409 } 4410 4411 /** 4412 * @param offset Cursor offset. Must be in [-1, length]. 4413 * @param parentScrolled If the parent has been scrolled or not. 4414 */ 4415 @Override 4416 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4417 super.positionAtCursorOffset(offset, parentScrolled); 4418 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 4419 } 4420 4421 @Override 4422 public boolean onTouchEvent(MotionEvent event) { 4423 boolean superResult = super.onTouchEvent(event); 4424 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 4425 // Reset the touch word offset and x value when the user 4426 // re-engages the handle. 4427 mTouchWordDelta = 0.0f; 4428 mPrevX = UNSET_X_VALUE; 4429 } 4430 return superResult; 4431 } 4432 4433 private void positionAndAdjustForCrossingHandles(int offset) { 4434 final int anotherHandleOffset = 4435 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 4436 if ((isStartHandle() && offset >= anotherHandleOffset) 4437 || (!isStartHandle() && offset <= anotherHandleOffset)) { 4438 // Handles can not cross and selection is at least one character. 4439 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 4440 mTouchWordDelta = 0.0f; 4441 } 4442 positionAtCursorOffset(offset, false); 4443 } 4444 4445 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 4446 mTextView.getLocationOnScreen(mTextViewLocation); 4447 boolean nearEdge; 4448 if (atRtl == isStartHandle()) { 4449 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 4450 - mTextView.getPaddingRight(); 4451 nearEdge = x > rightEdge - mTextViewEdgeSlop; 4452 } else { 4453 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 4454 nearEdge = x < leftEdge + mTextViewEdgeSlop; 4455 } 4456 return nearEdge; 4457 } 4458 } 4459 4460 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 4461 final int trueLine = mTextView.getLineAtCoordinate(y); 4462 if (layout == null || prevLine > layout.getLineCount() 4463 || layout.getLineCount() <= 0 || prevLine < 0) { 4464 // Invalid parameters, just return whatever line is at y. 4465 return trueLine; 4466 } 4467 4468 if (Math.abs(trueLine - prevLine) >= 2) { 4469 // Only stick to lines if we're within a line of the previous selection. 4470 return trueLine; 4471 } 4472 4473 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 4474 final int lineCount = layout.getLineCount(); 4475 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 4476 4477 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 4478 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 4479 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 4480 4481 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 4482 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 4483 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 4484 4485 // Determine if we've moved lines based on y position and previous line. 4486 int currLine; 4487 if (y <= yTopBound) { 4488 currLine = Math.max(prevLine - 1, 0); 4489 } else if (y >= yBottomBound) { 4490 currLine = Math.min(prevLine + 1, lineCount - 1); 4491 } else { 4492 currLine = prevLine; 4493 } 4494 return currLine; 4495 } 4496 4497 /** 4498 * A CursorController instance can be used to control a cursor in the text. 4499 */ 4500 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4501 /** 4502 * Makes the cursor controller visible on screen. 4503 * See also {@link #hide()}. 4504 */ 4505 public void show(); 4506 4507 /** 4508 * Hide the cursor controller from screen. 4509 * See also {@link #show()}. 4510 */ 4511 public void hide(); 4512 4513 /** 4514 * Called when the view is detached from window. Perform house keeping task, such as 4515 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4516 * preventing the activity from being recycled. 4517 */ 4518 public void onDetached(); 4519 } 4520 4521 private class InsertionPointCursorController implements CursorController { 4522 private InsertionHandleView mHandle; 4523 4524 public void show() { 4525 getHandle().show(); 4526 4527 if (mSelectionModifierCursorController != null) { 4528 mSelectionModifierCursorController.hide(); 4529 } 4530 } 4531 4532 public void hide() { 4533 if (mHandle != null) { 4534 mHandle.hide(); 4535 } 4536 } 4537 4538 public void onTouchModeChanged(boolean isInTouchMode) { 4539 if (!isInTouchMode) { 4540 hide(); 4541 } 4542 } 4543 4544 private InsertionHandleView getHandle() { 4545 if (mSelectHandleCenter == null) { 4546 mSelectHandleCenter = mTextView.getContext().getDrawable( 4547 mTextView.mTextSelectHandleRes); 4548 } 4549 if (mHandle == null) { 4550 mHandle = new InsertionHandleView(mSelectHandleCenter); 4551 } 4552 return mHandle; 4553 } 4554 4555 @Override 4556 public void onDetached() { 4557 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4558 observer.removeOnTouchModeChangeListener(this); 4559 4560 if (mHandle != null) mHandle.onDetached(); 4561 } 4562 } 4563 4564 class SelectionModifierCursorController implements CursorController { 4565 // The cursor controller handles, lazily created when shown. 4566 private SelectionHandleView mStartHandle; 4567 private SelectionHandleView mEndHandle; 4568 // The offsets of that last touch down event. Remembered to start selection there. 4569 private int mMinTouchOffset, mMaxTouchOffset; 4570 4571 private float mDownPositionX, mDownPositionY; 4572 private boolean mGestureStayedInTapRegion; 4573 4574 // Where the user first starts the drag motion. 4575 private int mStartOffset = -1; 4576 4577 private boolean mHaventMovedEnoughToStartDrag; 4578 // The line that a selection happened most recently with the drag accelerator. 4579 private int mLineSelectionIsOn = -1; 4580 // Whether the drag accelerator has selected past the initial line. 4581 private boolean mSwitchedLines = false; 4582 4583 // Indicates the drag accelerator mode that the user is currently using. 4584 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 4585 // Drag accelerator is inactive. 4586 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 4587 // Character based selection by dragging. Only for mouse. 4588 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 4589 // Word based selection by dragging. Enabled after long pressing or double tapping. 4590 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 4591 // Paragraph based selection by dragging. Enabled after mouse triple click. 4592 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 4593 4594 SelectionModifierCursorController() { 4595 resetTouchOffsets(); 4596 } 4597 4598 public void show() { 4599 if (mTextView.isInBatchEditMode()) { 4600 return; 4601 } 4602 initDrawables(); 4603 initHandles(); 4604 } 4605 4606 private void initDrawables() { 4607 if (mSelectHandleLeft == null) { 4608 mSelectHandleLeft = mTextView.getContext().getDrawable( 4609 mTextView.mTextSelectHandleLeftRes); 4610 } 4611 if (mSelectHandleRight == null) { 4612 mSelectHandleRight = mTextView.getContext().getDrawable( 4613 mTextView.mTextSelectHandleRightRes); 4614 } 4615 } 4616 4617 private void initHandles() { 4618 // Lazy object creation has to be done before updatePosition() is called. 4619 if (mStartHandle == null) { 4620 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 4621 com.android.internal.R.id.selection_start_handle, 4622 HANDLE_TYPE_SELECTION_START); 4623 } 4624 if (mEndHandle == null) { 4625 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 4626 com.android.internal.R.id.selection_end_handle, 4627 HANDLE_TYPE_SELECTION_END); 4628 } 4629 4630 mStartHandle.show(); 4631 mEndHandle.show(); 4632 4633 hideInsertionPointCursorController(); 4634 } 4635 4636 public void hide() { 4637 if (mStartHandle != null) mStartHandle.hide(); 4638 if (mEndHandle != null) mEndHandle.hide(); 4639 } 4640 4641 public void enterDrag(int dragAcceleratorMode) { 4642 // Just need to init the handles / hide insertion cursor. 4643 show(); 4644 mDragAcceleratorMode = dragAcceleratorMode; 4645 // Start location of selection. 4646 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4647 mLastDownPositionY); 4648 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 4649 // Don't show the handles until user has lifted finger. 4650 hide(); 4651 4652 // This stops scrolling parents from intercepting the touch event, allowing 4653 // the user to continue dragging across the screen to select text; TextView will 4654 // scroll as necessary. 4655 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4656 mTextView.cancelLongPress(); 4657 } 4658 4659 public void onTouchEvent(MotionEvent event) { 4660 // This is done even when the View does not have focus, so that long presses can start 4661 // selection and tap can move cursor from this tap position. 4662 final float eventX = event.getX(); 4663 final float eventY = event.getY(); 4664 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 4665 switch (event.getActionMasked()) { 4666 case MotionEvent.ACTION_DOWN: 4667 if (extractedTextModeWillBeStarted()) { 4668 // Prevent duplicating the selection handles until the mode starts. 4669 hide(); 4670 } else { 4671 // Remember finger down position, to be able to start selection from there. 4672 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 4673 eventX, eventY); 4674 4675 // Double tap detection 4676 if (mGestureStayedInTapRegion) { 4677 if (mTapState == TAP_STATE_DOUBLE_TAP 4678 || mTapState == TAP_STATE_TRIPLE_CLICK) { 4679 final float deltaX = eventX - mDownPositionX; 4680 final float deltaY = eventY - mDownPositionY; 4681 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4682 4683 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4684 mTextView.getContext()); 4685 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4686 boolean stayedInArea = 4687 distanceSquared < doubleTapSlop * doubleTapSlop; 4688 4689 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 4690 if (mTapState == TAP_STATE_DOUBLE_TAP) { 4691 selectCurrentWordAndStartDrag(); 4692 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 4693 selectCurrentParagraphAndStartDrag(); 4694 } 4695 mDiscardNextActionUp = true; 4696 } 4697 } 4698 } 4699 4700 mDownPositionX = eventX; 4701 mDownPositionY = eventY; 4702 mGestureStayedInTapRegion = true; 4703 mHaventMovedEnoughToStartDrag = true; 4704 } 4705 break; 4706 4707 case MotionEvent.ACTION_POINTER_DOWN: 4708 case MotionEvent.ACTION_POINTER_UP: 4709 // Handle multi-point gestures. Keep min and max offset positions. 4710 // Only activated for devices that correctly handle multi-touch. 4711 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4712 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4713 updateMinAndMaxOffsets(event); 4714 } 4715 break; 4716 4717 case MotionEvent.ACTION_MOVE: 4718 final ViewConfiguration viewConfig = ViewConfiguration.get( 4719 mTextView.getContext()); 4720 final int touchSlop = viewConfig.getScaledTouchSlop(); 4721 4722 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 4723 final float deltaX = eventX - mDownPositionX; 4724 final float deltaY = eventY - mDownPositionY; 4725 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4726 4727 if (mGestureStayedInTapRegion) { 4728 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 4729 mGestureStayedInTapRegion = 4730 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 4731 } 4732 if (mHaventMovedEnoughToStartDrag) { 4733 // We don't start dragging until the user has moved enough. 4734 mHaventMovedEnoughToStartDrag = 4735 distanceSquared <= touchSlop * touchSlop; 4736 } 4737 } 4738 4739 if (isMouse && !isDragAcceleratorActive()) { 4740 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 4741 if (mStartOffset != offset) { 4742 // Start character based drag accelerator. 4743 if (mTextActionMode != null) { 4744 mTextActionMode.finish(); 4745 } 4746 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 4747 mDiscardNextActionUp = true; 4748 mHaventMovedEnoughToStartDrag = false; 4749 } 4750 } 4751 4752 if (mStartHandle != null && mStartHandle.isShowing()) { 4753 // Don't do the drag if the handles are showing already. 4754 break; 4755 } 4756 4757 updateSelection(event); 4758 break; 4759 4760 case MotionEvent.ACTION_UP: 4761 if (!isDragAcceleratorActive()) { 4762 break; 4763 } 4764 updateSelection(event); 4765 4766 // No longer dragging to select text, let the parent intercept events. 4767 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4768 4769 int startOffset = mTextView.getSelectionStart(); 4770 int endOffset = mTextView.getSelectionEnd(); 4771 4772 // Since we don't let drag handles pass once they're visible, we need to 4773 // make sure the start / end locations are correct because the user *can* 4774 // switch directions during the initial drag. 4775 if (endOffset < startOffset) { 4776 int tmp = endOffset; 4777 endOffset = startOffset; 4778 startOffset = tmp; 4779 4780 // Also update the selection with the right offsets in this case. 4781 Selection.setSelection((Spannable) mTextView.getText(), 4782 startOffset, endOffset); 4783 } 4784 if (startOffset != endOffset) { 4785 startSelectionActionMode(); 4786 } 4787 4788 // No longer the first dragging motion, reset. 4789 resetDragAcceleratorState(); 4790 break; 4791 } 4792 } 4793 4794 private void updateSelection(MotionEvent event) { 4795 if (mTextView.getLayout() != null) { 4796 switch (mDragAcceleratorMode) { 4797 case DRAG_ACCELERATOR_MODE_CHARACTER: 4798 updateCharacterBasedSelection(event); 4799 break; 4800 case DRAG_ACCELERATOR_MODE_WORD: 4801 updateWordBasedSelection(event); 4802 break; 4803 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 4804 updateParagraphBasedSelection(event); 4805 break; 4806 } 4807 } 4808 } 4809 4810 /** 4811 * If the TextView allows text selection, selects the current paragraph and starts a drag. 4812 * 4813 * @return true if the drag was started. 4814 */ 4815 private boolean selectCurrentParagraphAndStartDrag() { 4816 if (mInsertionActionModeRunnable != null) { 4817 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4818 } 4819 if (mTextActionMode != null) { 4820 mTextActionMode.finish(); 4821 } 4822 if (!selectCurrentParagraph()) { 4823 return false; 4824 } 4825 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 4826 return true; 4827 } 4828 4829 private void updateCharacterBasedSelection(MotionEvent event) { 4830 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 4831 Selection.setSelection((Spannable) mTextView.getText(), mStartOffset, offset); 4832 } 4833 4834 private void updateWordBasedSelection(MotionEvent event) { 4835 if (mHaventMovedEnoughToStartDrag) { 4836 return; 4837 } 4838 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 4839 final ViewConfiguration viewConfig = ViewConfiguration.get( 4840 mTextView.getContext()); 4841 final float eventX = event.getX(); 4842 final float eventY = event.getY(); 4843 final int currLine; 4844 if (isMouse) { 4845 // No need to offset the y coordinate for mouse input. 4846 currLine = mTextView.getLineAtCoordinate(eventY); 4847 } else { 4848 float y = eventY; 4849 if (mSwitchedLines) { 4850 // Offset the finger by the same vertical offset as the handles. 4851 // This improves visibility of the content being selected by 4852 // shifting the finger below the content, this is applied once 4853 // the user has switched lines. 4854 final int touchSlop = viewConfig.getScaledTouchSlop(); 4855 final float fingerOffset = (mStartHandle != null) 4856 ? mStartHandle.getIdealVerticalOffset() 4857 : touchSlop; 4858 y = eventY - fingerOffset; 4859 } 4860 4861 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 4862 y); 4863 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 4864 // Break early here, we want to offset the finger position from 4865 // the selection highlight, once the user moved their finger 4866 // to a different line we should apply the offset and *not* switch 4867 // lines until recomputing the position with the finger offset. 4868 mSwitchedLines = true; 4869 return; 4870 } 4871 } 4872 4873 int startOffset; 4874 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 4875 // Snap to word boundaries. 4876 if (mStartOffset < offset) { 4877 // Expanding with end handle. 4878 offset = getWordEnd(offset); 4879 startOffset = getWordStart(mStartOffset); 4880 } else { 4881 // Expanding with start handle. 4882 offset = getWordStart(offset); 4883 startOffset = getWordEnd(mStartOffset); 4884 } 4885 mLineSelectionIsOn = currLine; 4886 Selection.setSelection((Spannable) mTextView.getText(), 4887 startOffset, offset); 4888 } 4889 4890 private void updateParagraphBasedSelection(MotionEvent event) { 4891 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 4892 4893 final int start = Math.min(offset, mStartOffset); 4894 final int end = Math.max(offset, mStartOffset); 4895 final long paragraphsRange = getParagraphsRange(start, end); 4896 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 4897 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 4898 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 4899 } 4900 4901 /** 4902 * @param event 4903 */ 4904 private void updateMinAndMaxOffsets(MotionEvent event) { 4905 int pointerCount = event.getPointerCount(); 4906 for (int index = 0; index < pointerCount; index++) { 4907 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4908 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4909 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4910 } 4911 } 4912 4913 public int getMinTouchOffset() { 4914 return mMinTouchOffset; 4915 } 4916 4917 public int getMaxTouchOffset() { 4918 return mMaxTouchOffset; 4919 } 4920 4921 public void resetTouchOffsets() { 4922 mMinTouchOffset = mMaxTouchOffset = -1; 4923 resetDragAcceleratorState(); 4924 } 4925 4926 private void resetDragAcceleratorState() { 4927 mStartOffset = -1; 4928 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 4929 mSwitchedLines = false; 4930 } 4931 4932 /** 4933 * @return true iff this controller is currently used to move the selection start. 4934 */ 4935 public boolean isSelectionStartDragged() { 4936 return mStartHandle != null && mStartHandle.isDragging(); 4937 } 4938 4939 /** 4940 * @return true if the user is selecting text using the drag accelerator. 4941 */ 4942 public boolean isDragAcceleratorActive() { 4943 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 4944 } 4945 4946 public void onTouchModeChanged(boolean isInTouchMode) { 4947 if (!isInTouchMode) { 4948 hide(); 4949 } 4950 } 4951 4952 @Override 4953 public void onDetached() { 4954 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4955 observer.removeOnTouchModeChangeListener(this); 4956 4957 if (mStartHandle != null) mStartHandle.onDetached(); 4958 if (mEndHandle != null) mEndHandle.onDetached(); 4959 } 4960 } 4961 4962 private class CorrectionHighlighter { 4963 private final Path mPath = new Path(); 4964 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4965 private int mStart, mEnd; 4966 private long mFadingStartTime; 4967 private RectF mTempRectF; 4968 private final static int FADE_OUT_DURATION = 400; 4969 4970 public CorrectionHighlighter() { 4971 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4972 applicationScale); 4973 mPaint.setStyle(Paint.Style.FILL); 4974 } 4975 4976 public void highlight(CorrectionInfo info) { 4977 mStart = info.getOffset(); 4978 mEnd = mStart + info.getNewText().length(); 4979 mFadingStartTime = SystemClock.uptimeMillis(); 4980 4981 if (mStart < 0 || mEnd < 0) { 4982 stopAnimation(); 4983 } 4984 } 4985 4986 public void draw(Canvas canvas, int cursorOffsetVertical) { 4987 if (updatePath() && updatePaint()) { 4988 if (cursorOffsetVertical != 0) { 4989 canvas.translate(0, cursorOffsetVertical); 4990 } 4991 4992 canvas.drawPath(mPath, mPaint); 4993 4994 if (cursorOffsetVertical != 0) { 4995 canvas.translate(0, -cursorOffsetVertical); 4996 } 4997 invalidate(true); // TODO invalidate cursor region only 4998 } else { 4999 stopAnimation(); 5000 invalidate(false); // TODO invalidate cursor region only 5001 } 5002 } 5003 5004 private boolean updatePaint() { 5005 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 5006 if (duration > FADE_OUT_DURATION) return false; 5007 5008 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 5009 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 5010 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 5011 ((int) (highlightColorAlpha * coef) << 24); 5012 mPaint.setColor(color); 5013 return true; 5014 } 5015 5016 private boolean updatePath() { 5017 final Layout layout = mTextView.getLayout(); 5018 if (layout == null) return false; 5019 5020 // Update in case text is edited while the animation is run 5021 final int length = mTextView.getText().length(); 5022 int start = Math.min(length, mStart); 5023 int end = Math.min(length, mEnd); 5024 5025 mPath.reset(); 5026 layout.getSelectionPath(start, end, mPath); 5027 return true; 5028 } 5029 5030 private void invalidate(boolean delayed) { 5031 if (mTextView.getLayout() == null) return; 5032 5033 if (mTempRectF == null) mTempRectF = new RectF(); 5034 mPath.computeBounds(mTempRectF, false); 5035 5036 int left = mTextView.getCompoundPaddingLeft(); 5037 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 5038 5039 if (delayed) { 5040 mTextView.postInvalidateOnAnimation( 5041 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 5042 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 5043 } else { 5044 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 5045 (int) mTempRectF.right, (int) mTempRectF.bottom); 5046 } 5047 } 5048 5049 private void stopAnimation() { 5050 Editor.this.mCorrectionHighlighter = null; 5051 } 5052 } 5053 5054 private static class ErrorPopup extends PopupWindow { 5055 private boolean mAbove = false; 5056 private final TextView mView; 5057 private int mPopupInlineErrorBackgroundId = 0; 5058 private int mPopupInlineErrorAboveBackgroundId = 0; 5059 5060 ErrorPopup(TextView v, int width, int height) { 5061 super(v, width, height); 5062 mView = v; 5063 // Make sure the TextView has a background set as it will be used the first time it is 5064 // shown and positioned. Initialized with below background, which should have 5065 // dimensions identical to the above version for this to work (and is more likely). 5066 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5067 com.android.internal.R.styleable.Theme_errorMessageBackground); 5068 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 5069 } 5070 5071 void fixDirection(boolean above) { 5072 mAbove = above; 5073 5074 if (above) { 5075 mPopupInlineErrorAboveBackgroundId = 5076 getResourceId(mPopupInlineErrorAboveBackgroundId, 5077 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 5078 } else { 5079 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 5080 com.android.internal.R.styleable.Theme_errorMessageBackground); 5081 } 5082 5083 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 5084 mPopupInlineErrorBackgroundId); 5085 } 5086 5087 private int getResourceId(int currentId, int index) { 5088 if (currentId == 0) { 5089 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 5090 R.styleable.Theme); 5091 currentId = styledAttributes.getResourceId(index, 0); 5092 styledAttributes.recycle(); 5093 } 5094 return currentId; 5095 } 5096 5097 @Override 5098 public void update(int x, int y, int w, int h, boolean force) { 5099 super.update(x, y, w, h, force); 5100 5101 boolean above = isAboveAnchor(); 5102 if (above != mAbove) { 5103 fixDirection(above); 5104 } 5105 } 5106 } 5107 5108 static class InputContentType { 5109 int imeOptions = EditorInfo.IME_NULL; 5110 String privateImeOptions; 5111 CharSequence imeActionLabel; 5112 int imeActionId; 5113 Bundle extras; 5114 OnEditorActionListener onEditorActionListener; 5115 boolean enterDown; 5116 } 5117 5118 static class InputMethodState { 5119 ExtractedTextRequest mExtractedTextRequest; 5120 final ExtractedText mExtractedText = new ExtractedText(); 5121 int mBatchEditNesting; 5122 boolean mCursorChanged; 5123 boolean mSelectionModeChanged; 5124 boolean mContentChanged; 5125 int mChangedStart, mChangedEnd, mChangedDelta; 5126 } 5127 5128 /** 5129 * @return True iff (start, end) is a valid range within the text. 5130 */ 5131 private static boolean isValidRange(CharSequence text, int start, int end) { 5132 return 0 <= start && start <= end && end <= text.length(); 5133 } 5134 5135 @VisibleForTesting 5136 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 5137 return mSuggestionsPopupWindow; 5138 } 5139 5140 /** 5141 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5142 * text being typed (and hence always returns null from the filter() method). 5143 */ 5144 public static class UndoInputFilter implements InputFilter { 5145 private final Editor mEditor; 5146 5147 // Whether the current filter pass is directly caused by an end-user text edit. 5148 private boolean mIsUserEdit; 5149 5150 // Whether the text field is handling an IME composition. Must be parceled in case the user 5151 // rotates the screen during composition. 5152 private boolean mHasComposition; 5153 5154 public UndoInputFilter(Editor editor) { 5155 mEditor = editor; 5156 } 5157 5158 public void saveInstanceState(Parcel parcel) { 5159 parcel.writeInt(mIsUserEdit ? 1 : 0); 5160 parcel.writeInt(mHasComposition ? 1 : 0); 5161 } 5162 5163 public void restoreInstanceState(Parcel parcel) { 5164 mIsUserEdit = parcel.readInt() != 0; 5165 mHasComposition = parcel.readInt() != 0; 5166 } 5167 5168 /** 5169 * Signals that a user-triggered edit is starting. 5170 */ 5171 public void beginBatchEdit() { 5172 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5173 mIsUserEdit = true; 5174 } 5175 5176 public void endBatchEdit() { 5177 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5178 mIsUserEdit = false; 5179 } 5180 5181 @Override 5182 public CharSequence filter(CharSequence source, int start, int end, 5183 Spanned dest, int dstart, int dend) { 5184 if (DEBUG_UNDO) { 5185 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 5186 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5187 } 5188 5189 // Check to see if this edit should be tracked for undo. 5190 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5191 return null; 5192 } 5193 5194 // Check for and handle IME composition edits. 5195 if (handleCompositionEdit(source, start, end, dstart)) { 5196 return null; 5197 } 5198 5199 // Handle keyboard edits. 5200 handleKeyboardEdit(source, start, end, dest, dstart, dend); 5201 return null; 5202 } 5203 5204 /** 5205 * Returns true iff the edit was handled, either because it should be ignored or because 5206 * this function created an undo operation for it. 5207 */ 5208 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 5209 // Ignore edits while the user is composing. 5210 if (isComposition(source)) { 5211 mHasComposition = true; 5212 return true; 5213 } 5214 final boolean hadComposition = mHasComposition; 5215 mHasComposition = false; 5216 5217 // Check for the transition out of the composing state. 5218 if (hadComposition) { 5219 // If there was no text the user canceled composition. Ignore the edit. 5220 if (start == end) { 5221 return true; 5222 } 5223 5224 // Otherwise the user inserted the composition. 5225 String newText = TextUtils.substring(source, start, end); 5226 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 5227 recordEdit(edit, false /* forceMerge */); 5228 return true; 5229 } 5230 5231 // This was neither a composition event nor a transition out of composing. 5232 return false; 5233 } 5234 5235 private void handleKeyboardEdit(CharSequence source, int start, int end, 5236 Spanned dest, int dstart, int dend) { 5237 // An application may install a TextWatcher to provide additional modifications after 5238 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5239 // string). This results in multiple filter() calls for what the user considers to be 5240 // a single operation. Always undo the whole set of changes in one step. 5241 final boolean forceMerge = isInTextWatcher(); 5242 5243 // Build a new operation with all the information from this edit. 5244 String newText = TextUtils.substring(source, start, end); 5245 String oldText = TextUtils.substring(dest, dstart, dend); 5246 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 5247 recordEdit(edit, forceMerge); 5248 } 5249 5250 /** 5251 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5252 * If forceMerge is true then the new edit is always merged. 5253 */ 5254 private void recordEdit(EditOperation edit, boolean forceMerge) { 5255 // Fetch the last edit operation and attempt to merge in the new edit. 5256 final UndoManager um = mEditor.mUndoManager; 5257 um.beginUpdate("Edit text"); 5258 EditOperation lastEdit = um.getLastOperation( 5259 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5260 if (lastEdit == null) { 5261 // Add this as the first edit. 5262 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5263 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5264 } else if (forceMerge) { 5265 // Forced merges take priority because they could be the result of a non-user-edit 5266 // change and this case should not create a new undo operation. 5267 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5268 lastEdit.forceMergeWith(edit); 5269 } else if (!mIsUserEdit) { 5270 // An application directly modified the Editable outside of a text edit. Treat this 5271 // as a new change and don't attempt to merge. 5272 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5273 um.commitState(mEditor.mUndoOwner); 5274 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5275 } else if (lastEdit.mergeWith(edit)) { 5276 // Merge succeeded, nothing else to do. 5277 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5278 } else { 5279 // Could not merge with the last edit, so commit the last edit and add this edit. 5280 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5281 um.commitState(mEditor.mUndoOwner); 5282 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5283 } 5284 um.endUpdate(); 5285 } 5286 5287 private boolean canUndoEdit(CharSequence source, int start, int end, 5288 Spanned dest, int dstart, int dend) { 5289 if (!mEditor.mAllowUndo) { 5290 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5291 return false; 5292 } 5293 5294 if (mEditor.mUndoManager.isInUndo()) { 5295 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5296 return false; 5297 } 5298 5299 // Text filters run before input operations are applied. However, some input operations 5300 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5301 // attempt to undo invalid operations. 5302 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5303 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5304 return false; 5305 } 5306 5307 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5308 // on an input field. Skip no-op changes. 5309 if (start == end && dstart == dend) { 5310 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5311 return false; 5312 } 5313 5314 return true; 5315 } 5316 5317 private boolean isComposition(CharSequence source) { 5318 if (!(source instanceof Spannable)) { 5319 return false; 5320 } 5321 // This is a composition edit if the source has a non-zero-length composing span. 5322 Spannable text = (Spannable) source; 5323 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 5324 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 5325 return composeBegin < composeEnd; 5326 } 5327 5328 private boolean isInTextWatcher() { 5329 CharSequence text = mEditor.mTextView.getText(); 5330 return (text instanceof SpannableStringBuilder) 5331 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 5332 } 5333 } 5334 5335 /** 5336 * An operation to undo a single "edit" to a text view. 5337 */ 5338 public static class EditOperation extends UndoOperation<Editor> { 5339 private static final int TYPE_INSERT = 0; 5340 private static final int TYPE_DELETE = 1; 5341 private static final int TYPE_REPLACE = 2; 5342 5343 private int mType; 5344 private String mOldText; 5345 private int mOldTextStart; 5346 private String mNewText; 5347 private int mNewTextStart; 5348 5349 private int mOldCursorPos; 5350 private int mNewCursorPos; 5351 5352 /** 5353 * Constructs an edit operation from a text input operation on editor that replaces the 5354 * oldText starting at dstart with newText. 5355 */ 5356 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 5357 super(editor.mUndoOwner); 5358 mOldText = oldText; 5359 mNewText = newText; 5360 5361 // Determine the type of the edit and store where it occurred. Avoid storing 5362 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 5363 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 5364 // outside the bounds of the final text). 5365 if (mNewText.length() > 0 && mOldText.length() == 0) { 5366 mType = TYPE_INSERT; 5367 mNewTextStart = dstart; 5368 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 5369 mType = TYPE_DELETE; 5370 mOldTextStart = dstart; 5371 } else { 5372 mType = TYPE_REPLACE; 5373 mOldTextStart = mNewTextStart = dstart; 5374 } 5375 5376 // Store cursor data. 5377 mOldCursorPos = editor.mTextView.getSelectionStart(); 5378 mNewCursorPos = dstart + mNewText.length(); 5379 } 5380 5381 public EditOperation(Parcel src, ClassLoader loader) { 5382 super(src, loader); 5383 mType = src.readInt(); 5384 mOldText = src.readString(); 5385 mOldTextStart = src.readInt(); 5386 mNewText = src.readString(); 5387 mNewTextStart = src.readInt(); 5388 mOldCursorPos = src.readInt(); 5389 mNewCursorPos = src.readInt(); 5390 } 5391 5392 @Override 5393 public void writeToParcel(Parcel dest, int flags) { 5394 dest.writeInt(mType); 5395 dest.writeString(mOldText); 5396 dest.writeInt(mOldTextStart); 5397 dest.writeString(mNewText); 5398 dest.writeInt(mNewTextStart); 5399 dest.writeInt(mOldCursorPos); 5400 dest.writeInt(mNewCursorPos); 5401 } 5402 5403 private int getNewTextEnd() { 5404 return mNewTextStart + mNewText.length(); 5405 } 5406 5407 private int getOldTextEnd() { 5408 return mOldTextStart + mOldText.length(); 5409 } 5410 5411 @Override 5412 public void commit() { 5413 } 5414 5415 @Override 5416 public void undo() { 5417 if (DEBUG_UNDO) Log.d(TAG, "undo"); 5418 // Remove the new text and insert the old. 5419 Editor editor = getOwnerData(); 5420 Editable text = (Editable) editor.mTextView.getText(); 5421 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5422 mOldCursorPos); 5423 } 5424 5425 @Override 5426 public void redo() { 5427 if (DEBUG_UNDO) Log.d(TAG, "redo"); 5428 // Remove the old text and insert the new. 5429 Editor editor = getOwnerData(); 5430 Editable text = (Editable) editor.mTextView.getText(); 5431 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 5432 mNewCursorPos); 5433 } 5434 5435 /** 5436 * Attempts to merge this existing operation with a new edit. 5437 * @param edit The new edit operation. 5438 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 5439 * object unchanged. 5440 */ 5441 private boolean mergeWith(EditOperation edit) { 5442 if (DEBUG_UNDO) { 5443 Log.d(TAG, "mergeWith old " + this); 5444 Log.d(TAG, "mergeWith new " + edit); 5445 } 5446 switch (mType) { 5447 case TYPE_INSERT: 5448 return mergeInsertWith(edit); 5449 case TYPE_DELETE: 5450 return mergeDeleteWith(edit); 5451 case TYPE_REPLACE: 5452 return mergeReplaceWith(edit); 5453 default: 5454 return false; 5455 } 5456 } 5457 5458 private boolean mergeInsertWith(EditOperation edit) { 5459 // Only merge continuous insertions. 5460 if (edit.mType != TYPE_INSERT) { 5461 return false; 5462 } 5463 // Only merge insertions that are contiguous. 5464 if (getNewTextEnd() != edit.mNewTextStart) { 5465 return false; 5466 } 5467 mNewText += edit.mNewText; 5468 mNewCursorPos = edit.mNewCursorPos; 5469 return true; 5470 } 5471 5472 // TODO: Support forward delete. 5473 private boolean mergeDeleteWith(EditOperation edit) { 5474 // Only merge continuous deletes. 5475 if (edit.mType != TYPE_DELETE) { 5476 return false; 5477 } 5478 // Only merge deletions that are contiguous. 5479 if (mOldTextStart != edit.getOldTextEnd()) { 5480 return false; 5481 } 5482 mOldTextStart = edit.mOldTextStart; 5483 mOldText = edit.mOldText + mOldText; 5484 mNewCursorPos = edit.mNewCursorPos; 5485 return true; 5486 } 5487 5488 private boolean mergeReplaceWith(EditOperation edit) { 5489 // Replacements can merge only with adjacent inserts. 5490 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5491 return false; 5492 } 5493 mOldText += edit.mOldText; 5494 mNewText += edit.mNewText; 5495 mNewCursorPos = edit.mNewCursorPos; 5496 return true; 5497 } 5498 5499 /** 5500 * Forcibly creates a single merged edit operation by simulating the entire text 5501 * contents being replaced. 5502 */ 5503 public void forceMergeWith(EditOperation edit) { 5504 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5505 Editor editor = getOwnerData(); 5506 5507 // Copy the text of the current field. 5508 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5509 // but would require two parallel implementations of modifyText() because Editable and 5510 // StringBuilder do not share an interface for replace/delete/insert. 5511 Editable editable = (Editable) editor.mTextView.getText(); 5512 Editable originalText = new SpannableStringBuilder(editable.toString()); 5513 5514 // Roll back the last operation. 5515 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5516 mOldCursorPos); 5517 5518 // Clone the text again and apply the new operation. 5519 Editable finalText = new SpannableStringBuilder(editable.toString()); 5520 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5521 edit.mNewTextStart, edit.mNewCursorPos); 5522 5523 // Convert this operation into a non-mergeable replacement of the entire string. 5524 mType = TYPE_REPLACE; 5525 mNewText = finalText.toString(); 5526 mNewTextStart = 0; 5527 mOldText = originalText.toString(); 5528 mOldTextStart = 0; 5529 mNewCursorPos = edit.mNewCursorPos; 5530 // mOldCursorPos is unchanged. 5531 } 5532 5533 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5534 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5535 // Apply the edit if it is still valid. 5536 if (isValidRange(text, deleteFrom, deleteTo) && 5537 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5538 if (deleteFrom != deleteTo) { 5539 text.delete(deleteFrom, deleteTo); 5540 } 5541 if (newText.length() != 0) { 5542 text.insert(newTextInsertAt, newText); 5543 } 5544 } 5545 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5546 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5547 // TODO: Select all the text that was undone. 5548 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5549 Selection.setSelection(text, newCursorPos); 5550 } 5551 } 5552 5553 private String getTypeString() { 5554 switch (mType) { 5555 case TYPE_INSERT: 5556 return "insert"; 5557 case TYPE_DELETE: 5558 return "delete"; 5559 case TYPE_REPLACE: 5560 return "replace"; 5561 default: 5562 return ""; 5563 } 5564 } 5565 5566 @Override 5567 public String toString() { 5568 return "[mType=" + getTypeString() + ", " + 5569 "mOldText=" + mOldText + ", " + 5570 "mOldTextStart=" + mOldTextStart + ", " + 5571 "mNewText=" + mNewText + ", " + 5572 "mNewTextStart=" + mNewTextStart + ", " + 5573 "mOldCursorPos=" + mOldCursorPos + ", " + 5574 "mNewCursorPos=" + mNewCursorPos + "]"; 5575 } 5576 5577 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5578 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5579 @Override 5580 public EditOperation createFromParcel(Parcel in) { 5581 return new EditOperation(in, null); 5582 } 5583 5584 @Override 5585 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5586 return new EditOperation(in, loader); 5587 } 5588 5589 @Override 5590 public EditOperation[] newArray(int size) { 5591 return new EditOperation[size]; 5592 } 5593 }; 5594 } 5595 5596 /** 5597 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 5598 * These allow external applications to plug into currently selected text. 5599 */ 5600 static final class ProcessTextIntentActionsHandler { 5601 5602 private final Editor mEditor; 5603 private final TextView mTextView; 5604 private final PackageManager mPackageManager; 5605 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<Intent>(); 5606 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions 5607 = new SparseArray<AccessibilityNodeInfo.AccessibilityAction>(); 5608 5609 private ProcessTextIntentActionsHandler(Editor editor) { 5610 mEditor = Preconditions.checkNotNull(editor); 5611 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 5612 mPackageManager = Preconditions.checkNotNull( 5613 mTextView.getContext().getPackageManager()); 5614 } 5615 5616 /** 5617 * Adds "PROCESS_TEXT" menu items to the specified menu. 5618 */ 5619 public void onInitializeMenu(Menu menu) { 5620 int i = 0; 5621 for (ResolveInfo resolveInfo : getSupportedActivities()) { 5622 menu.add(Menu.NONE, Menu.NONE, 5623 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i++, 5624 getLabel(resolveInfo)) 5625 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 5626 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 5627 } 5628 } 5629 5630 /** 5631 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 5632 * menu item. 5633 * 5634 * @return True if the action was performed, false otherwise. 5635 */ 5636 public boolean performMenuItemAction(MenuItem item) { 5637 return fireIntent(item.getIntent()); 5638 } 5639 5640 /** 5641 * Initializes and caches "PROCESS_TEXT" accessibility actions. 5642 */ 5643 public void initializeAccessibilityActions() { 5644 mAccessibilityIntents.clear(); 5645 mAccessibilityActions.clear(); 5646 int i = 0; 5647 for (ResolveInfo resolveInfo : getSupportedActivities()) { 5648 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 5649 mAccessibilityActions.put( 5650 actionId, 5651 new AccessibilityNodeInfo.AccessibilityAction( 5652 actionId, getLabel(resolveInfo))); 5653 mAccessibilityIntents.put( 5654 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 5655 } 5656 } 5657 5658 /** 5659 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 5660 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 5661 * latest accessibility actions available for this call. 5662 */ 5663 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 5664 for (int i = 0; i < mAccessibilityActions.size(); i++) { 5665 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 5666 } 5667 } 5668 5669 /** 5670 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 5671 * accessibility action id. 5672 * 5673 * @return True if the action was performed, false otherwise. 5674 */ 5675 public boolean performAccessibilityAction(int actionId) { 5676 return fireIntent(mAccessibilityIntents.get(actionId)); 5677 } 5678 5679 private boolean fireIntent(Intent intent) { 5680 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 5681 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 5682 mEditor.mPreserveDetachedSelection = true; 5683 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 5684 return true; 5685 } 5686 return false; 5687 } 5688 5689 private List<ResolveInfo> getSupportedActivities() { 5690 PackageManager packageManager = mTextView.getContext().getPackageManager(); 5691 return packageManager.queryIntentActivities(createProcessTextIntent(), 0); 5692 } 5693 5694 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 5695 return createProcessTextIntent() 5696 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 5697 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 5698 } 5699 5700 private Intent createProcessTextIntent() { 5701 return new Intent() 5702 .setAction(Intent.ACTION_PROCESS_TEXT) 5703 .setType("text/plain"); 5704 } 5705 5706 private CharSequence getLabel(ResolveInfo resolveInfo) { 5707 return resolveInfo.loadLabel(mPackageManager); 5708 } 5709 } 5710} 5711