Editor.java revision 3b69fd81df89896cdd6c2903c79da744bd1eabfd
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.Nullable; 21import android.app.PendingIntent; 22import android.app.PendingIntent.CanceledException; 23import android.content.ClipData; 24import android.content.ClipData.Item; 25import android.content.Context; 26import android.content.Intent; 27import android.content.UndoManager; 28import android.content.UndoOperation; 29import android.content.UndoOwner; 30import android.content.pm.PackageManager; 31import android.content.pm.ResolveInfo; 32import android.content.res.TypedArray; 33import android.graphics.Canvas; 34import android.graphics.Color; 35import android.graphics.Matrix; 36import android.graphics.Paint; 37import android.graphics.Path; 38import android.graphics.Rect; 39import android.graphics.RectF; 40import android.graphics.drawable.Drawable; 41import android.inputmethodservice.ExtractEditText; 42import android.os.Bundle; 43import android.os.Handler; 44import android.os.Parcel; 45import android.os.Parcelable; 46import android.os.ParcelableParcel; 47import android.os.SystemClock; 48import android.provider.Settings; 49import android.text.DynamicLayout; 50import android.text.Editable; 51import android.text.InputFilter; 52import android.text.InputType; 53import android.text.Layout; 54import android.text.ParcelableSpan; 55import android.text.Selection; 56import android.text.SpanWatcher; 57import android.text.Spannable; 58import android.text.SpannableStringBuilder; 59import android.text.Spanned; 60import android.text.StaticLayout; 61import android.text.TextUtils; 62import android.text.method.KeyListener; 63import android.text.method.MetaKeyKeyListener; 64import android.text.method.MovementMethod; 65import android.text.method.WordIterator; 66import android.text.style.EasyEditSpan; 67import android.text.style.SuggestionRangeSpan; 68import android.text.style.SuggestionSpan; 69import android.text.style.TextAppearanceSpan; 70import android.text.style.URLSpan; 71import android.util.DisplayMetrics; 72import android.util.Log; 73import android.view.ActionMode; 74import android.view.ActionMode.Callback; 75import android.view.DisplayListCanvas; 76import android.view.DragEvent; 77import android.view.Gravity; 78import android.view.LayoutInflater; 79import android.view.Menu; 80import android.view.MenuItem; 81import android.view.MotionEvent; 82import android.view.RenderNode; 83import android.view.View; 84import android.view.View.DragShadowBuilder; 85import android.view.View.OnClickListener; 86import android.view.ViewConfiguration; 87import android.view.ViewGroup; 88import android.view.ViewGroup.LayoutParams; 89import android.view.ViewParent; 90import android.view.ViewTreeObserver; 91import android.view.WindowManager; 92import android.view.inputmethod.CorrectionInfo; 93import android.view.inputmethod.CursorAnchorInfo; 94import android.view.inputmethod.EditorInfo; 95import android.view.inputmethod.ExtractedText; 96import android.view.inputmethod.ExtractedTextRequest; 97import android.view.inputmethod.InputConnection; 98import android.view.inputmethod.InputMethodManager; 99import android.widget.AdapterView.OnItemClickListener; 100import android.widget.TextView.Drawables; 101import android.widget.TextView.OnEditorActionListener; 102 103import com.android.internal.util.ArrayUtils; 104import com.android.internal.util.GrowingArrayUtils; 105import com.android.internal.widget.EditableInputConnection; 106 107import java.text.BreakIterator; 108import java.util.Arrays; 109import java.util.Comparator; 110import java.util.HashMap; 111import java.util.List; 112 113/** 114 * Helper class used by TextView to handle editable text views. 115 * 116 * @hide 117 */ 118public class Editor { 119 private static final String TAG = "Editor"; 120 private static final boolean DEBUG_UNDO = false; 121 122 static final int BLINK = 500; 123 private static final float[] TEMP_POSITION = new float[2]; 124 private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 125 // Tag used when the Editor maintains its own separate UndoManager. 126 private static final String UNDO_OWNER_TAG = "Editor"; 127 128 // Ordering constants used to place the Action Mode items in their menu. 129 private static final int MENU_ITEM_ORDER_CUT = 1; 130 private static final int MENU_ITEM_ORDER_COPY = 2; 131 private static final int MENU_ITEM_ORDER_PASTE = 3; 132 private static final int MENU_ITEM_ORDER_SHARE = 4; 133 private static final int MENU_ITEM_ORDER_SELECT_ALL = 5; 134 private static final int MENU_ITEM_ORDER_REPLACE = 6; 135 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 10; 136 137 // Each Editor manages its own undo stack. 138 private final UndoManager mUndoManager = new UndoManager(); 139 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 140 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 141 boolean mAllowUndo = true; 142 143 // Cursor Controllers. 144 InsertionPointCursorController mInsertionPointCursorController; 145 SelectionModifierCursorController mSelectionModifierCursorController; 146 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 147 ActionMode mTextActionMode; 148 boolean mInsertionControllerEnabled; 149 boolean mSelectionControllerEnabled; 150 151 // Used to highlight a word when it is corrected by the IME 152 CorrectionHighlighter mCorrectionHighlighter; 153 154 InputContentType mInputContentType; 155 InputMethodState mInputMethodState; 156 157 private static class TextRenderNode { 158 RenderNode renderNode; 159 boolean isDirty; 160 public TextRenderNode(String name) { 161 isDirty = true; 162 renderNode = RenderNode.create(name, null); 163 } 164 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 165 } 166 TextRenderNode[] mTextRenderNodes; 167 168 boolean mFrozenWithFocus; 169 boolean mSelectionMoved; 170 boolean mTouchFocusSelected; 171 172 KeyListener mKeyListener; 173 int mInputType = EditorInfo.TYPE_NULL; 174 175 boolean mDiscardNextActionUp; 176 boolean mIgnoreActionUpEvent; 177 178 long mShowCursor; 179 Blink mBlink; 180 181 boolean mCursorVisible = true; 182 boolean mSelectAllOnFocus; 183 boolean mTextIsSelectable; 184 185 CharSequence mError; 186 boolean mErrorWasChanged; 187 ErrorPopup mErrorPopup; 188 189 /** 190 * This flag is set if the TextView tries to display an error before it 191 * is attached to the window (so its position is still unknown). 192 * It causes the error to be shown later, when onAttachedToWindow() 193 * is called. 194 */ 195 boolean mShowErrorAfterAttach; 196 197 boolean mInBatchEditControllers; 198 boolean mShowSoftInputOnFocus = true; 199 boolean mPreserveDetachedSelection; 200 boolean mTemporaryDetach; 201 202 SuggestionsPopupWindow mSuggestionsPopupWindow; 203 SuggestionRangeSpan mSuggestionRangeSpan; 204 Runnable mShowSuggestionRunnable; 205 206 final Drawable[] mCursorDrawable = new Drawable[2]; 207 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 208 209 private Drawable mSelectHandleLeft; 210 private Drawable mSelectHandleRight; 211 private Drawable mSelectHandleCenter; 212 213 // Global listener that detects changes in the global position of the TextView 214 private PositionListener mPositionListener; 215 216 float mLastDownPositionX, mLastDownPositionY; 217 Callback mCustomSelectionActionModeCallback; 218 Callback mCustomInsertionActionModeCallback; 219 220 // Set when this TextView gained focus with some text selected. Will start selection mode. 221 boolean mCreatedWithASelection; 222 223 boolean mDoubleTap = false; 224 225 private Runnable mInsertionActionModeRunnable; 226 227 // The span controller helps monitoring the changes to which the Editor needs to react: 228 // - EasyEditSpans, for which we have some UI to display on attach and on hide 229 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 230 private SpanController mSpanController; 231 232 WordIterator mWordIterator; 233 SpellChecker mSpellChecker; 234 235 // This word iterator is set with text and used to determine word boundaries 236 // when a user is selecting text. 237 private WordIterator mWordIteratorWithText; 238 // Indicate that the text in the word iterator needs to be updated. 239 private boolean mUpdateWordIteratorText; 240 241 private Rect mTempRect; 242 243 private TextView mTextView; 244 245 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 246 247 private final Runnable mHideFloatingToolbar = new Runnable() { 248 @Override 249 public void run() { 250 if (mTextActionMode != null) { 251 mTextActionMode.snooze(ActionMode.SNOOZE_TIME_DEFAULT); 252 } 253 } 254 }; 255 256 private final Runnable mShowFloatingToolbar = new Runnable() { 257 @Override 258 public void run() { 259 if (mTextActionMode != null) { 260 mTextActionMode.snooze(0); // snooze off. 261 } 262 } 263 }; 264 265 Editor(TextView textView) { 266 mTextView = textView; 267 // Synchronize the filter list, which places the undo input filter at the end. 268 mTextView.setFilters(mTextView.getFilters()); 269 } 270 271 ParcelableParcel saveInstanceState() { 272 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 273 Parcel parcel = state.getParcel(); 274 mUndoManager.saveInstanceState(parcel); 275 mUndoInputFilter.saveInstanceState(parcel); 276 return state; 277 } 278 279 void restoreInstanceState(ParcelableParcel state) { 280 Parcel parcel = state.getParcel(); 281 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 282 mUndoInputFilter.restoreInstanceState(parcel); 283 // Re-associate this object as the owner of undo state. 284 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 285 } 286 287 /** 288 * Forgets all undo and redo operations for this Editor. 289 */ 290 void forgetUndoRedo() { 291 UndoOwner[] owners = { mUndoOwner }; 292 mUndoManager.forgetUndos(owners, -1 /* all */); 293 mUndoManager.forgetRedos(owners, -1 /* all */); 294 } 295 296 boolean canUndo() { 297 UndoOwner[] owners = { mUndoOwner }; 298 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 299 } 300 301 boolean canRedo() { 302 UndoOwner[] owners = { mUndoOwner }; 303 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 304 } 305 306 void undo() { 307 if (!mAllowUndo) { 308 return; 309 } 310 UndoOwner[] owners = { mUndoOwner }; 311 mUndoManager.undo(owners, 1); // Undo 1 action. 312 } 313 314 void redo() { 315 if (!mAllowUndo) { 316 return; 317 } 318 UndoOwner[] owners = { mUndoOwner }; 319 mUndoManager.redo(owners, 1); // Redo 1 action. 320 } 321 322 void replace() { 323 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 324 stopTextActionMode(); 325 Selection.setSelection((Spannable) mTextView.getText(), middle); 326 showSuggestions(); 327 } 328 329 void onAttachedToWindow() { 330 if (mShowErrorAfterAttach) { 331 showError(); 332 mShowErrorAfterAttach = false; 333 } 334 mTemporaryDetach = false; 335 336 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 337 // No need to create the controller. 338 // The get method will add the listener on controller creation. 339 if (mInsertionPointCursorController != null) { 340 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 341 } 342 if (mSelectionModifierCursorController != null) { 343 mSelectionModifierCursorController.resetTouchOffsets(); 344 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 345 } 346 updateSpellCheckSpans(0, mTextView.getText().length(), 347 true /* create the spell checker if needed */); 348 349 if (mTextView.hasTransientState() && 350 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 351 // Since transient state is reference counted make sure it stays matched 352 // with our own calls to it for managing selection. 353 // The action mode callback will set this back again when/if the action mode starts. 354 mTextView.setHasTransientState(false); 355 356 // We had an active selection from before, start the selection mode. 357 startSelectionActionMode(); 358 } 359 360 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 361 resumeBlink(); 362 } 363 364 void onDetachedFromWindow() { 365 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 366 367 if (mError != null) { 368 hideError(); 369 } 370 371 suspendBlink(); 372 373 if (mInsertionPointCursorController != null) { 374 mInsertionPointCursorController.onDetached(); 375 } 376 377 if (mSelectionModifierCursorController != null) { 378 mSelectionModifierCursorController.onDetached(); 379 } 380 381 if (mShowSuggestionRunnable != null) { 382 mTextView.removeCallbacks(mShowSuggestionRunnable); 383 } 384 385 // Cancel the single tap delayed runnable. 386 if (mInsertionActionModeRunnable != null) { 387 mTextView.removeCallbacks(mInsertionActionModeRunnable); 388 } 389 390 mTextView.removeCallbacks(mHideFloatingToolbar); 391 mTextView.removeCallbacks(mShowFloatingToolbar); 392 393 destroyDisplayListsData(); 394 395 if (mSpellChecker != null) { 396 mSpellChecker.closeSession(); 397 // Forces the creation of a new SpellChecker next time this window is created. 398 // Will handle the cases where the settings has been changed in the meantime. 399 mSpellChecker = null; 400 } 401 402 mPreserveDetachedSelection = true; 403 hideControllers(); 404 stopTextActionMode(); 405 mPreserveDetachedSelection = false; 406 mTemporaryDetach = false; 407 } 408 409 private void destroyDisplayListsData() { 410 if (mTextRenderNodes != null) { 411 for (int i = 0; i < mTextRenderNodes.length; i++) { 412 RenderNode displayList = mTextRenderNodes[i] != null 413 ? mTextRenderNodes[i].renderNode : null; 414 if (displayList != null && displayList.isValid()) { 415 displayList.destroyDisplayListData(); 416 } 417 } 418 } 419 } 420 421 private void showError() { 422 if (mTextView.getWindowToken() == null) { 423 mShowErrorAfterAttach = true; 424 return; 425 } 426 427 if (mErrorPopup == null) { 428 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 429 final TextView err = (TextView) inflater.inflate( 430 com.android.internal.R.layout.textview_hint, null); 431 432 final float scale = mTextView.getResources().getDisplayMetrics().density; 433 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 434 mErrorPopup.setFocusable(false); 435 // The user is entering text, so the input method is needed. We 436 // don't want the popup to be displayed on top of it. 437 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 438 } 439 440 TextView tv = (TextView) mErrorPopup.getContentView(); 441 chooseSize(mErrorPopup, mError, tv); 442 tv.setText(mError); 443 444 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 445 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 446 } 447 448 public void setError(CharSequence error, Drawable icon) { 449 mError = TextUtils.stringOrSpannedString(error); 450 mErrorWasChanged = true; 451 452 if (mError == null) { 453 setErrorIcon(null); 454 if (mErrorPopup != null) { 455 if (mErrorPopup.isShowing()) { 456 mErrorPopup.dismiss(); 457 } 458 459 mErrorPopup = null; 460 } 461 mShowErrorAfterAttach = false; 462 } else { 463 setErrorIcon(icon); 464 if (mTextView.isFocused()) { 465 showError(); 466 } 467 } 468 } 469 470 private void setErrorIcon(Drawable icon) { 471 Drawables dr = mTextView.mDrawables; 472 if (dr == null) { 473 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 474 } 475 dr.setErrorDrawable(icon, mTextView); 476 477 mTextView.resetResolvedDrawables(); 478 mTextView.invalidate(); 479 mTextView.requestLayout(); 480 } 481 482 private void hideError() { 483 if (mErrorPopup != null) { 484 if (mErrorPopup.isShowing()) { 485 mErrorPopup.dismiss(); 486 } 487 } 488 489 mShowErrorAfterAttach = false; 490 } 491 492 /** 493 * Returns the X offset to make the pointy top of the error point 494 * at the middle of the error icon. 495 */ 496 private int getErrorX() { 497 /* 498 * The "25" is the distance between the point and the right edge 499 * of the background 500 */ 501 final float scale = mTextView.getResources().getDisplayMetrics().density; 502 503 final Drawables dr = mTextView.mDrawables; 504 505 final int layoutDirection = mTextView.getLayoutDirection(); 506 int errorX; 507 int offset; 508 switch (layoutDirection) { 509 default: 510 case View.LAYOUT_DIRECTION_LTR: 511 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 512 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 513 mTextView.getPaddingRight() + offset; 514 break; 515 case View.LAYOUT_DIRECTION_RTL: 516 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 517 errorX = mTextView.getPaddingLeft() + offset; 518 break; 519 } 520 return errorX; 521 } 522 523 /** 524 * Returns the Y offset to make the pointy top of the error point 525 * at the bottom of the error icon. 526 */ 527 private int getErrorY() { 528 /* 529 * Compound, not extended, because the icon is not clipped 530 * if the text height is smaller. 531 */ 532 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 533 int vspace = mTextView.getBottom() - mTextView.getTop() - 534 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 535 536 final Drawables dr = mTextView.mDrawables; 537 538 final int layoutDirection = mTextView.getLayoutDirection(); 539 int height; 540 switch (layoutDirection) { 541 default: 542 case View.LAYOUT_DIRECTION_LTR: 543 height = (dr != null ? dr.mDrawableHeightRight : 0); 544 break; 545 case View.LAYOUT_DIRECTION_RTL: 546 height = (dr != null ? dr.mDrawableHeightLeft : 0); 547 break; 548 } 549 550 int icontop = compoundPaddingTop + (vspace - height) / 2; 551 552 /* 553 * The "2" is the distance between the point and the top edge 554 * of the background. 555 */ 556 final float scale = mTextView.getResources().getDisplayMetrics().density; 557 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 558 } 559 560 void createInputContentTypeIfNeeded() { 561 if (mInputContentType == null) { 562 mInputContentType = new InputContentType(); 563 } 564 } 565 566 void createInputMethodStateIfNeeded() { 567 if (mInputMethodState == null) { 568 mInputMethodState = new InputMethodState(); 569 } 570 } 571 572 boolean isCursorVisible() { 573 // The default value is true, even when there is no associated Editor 574 return mCursorVisible && mTextView.isTextEditable(); 575 } 576 577 void prepareCursorControllers() { 578 boolean windowSupportsHandles = false; 579 580 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 581 if (params instanceof WindowManager.LayoutParams) { 582 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 583 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 584 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 585 } 586 587 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 588 mInsertionControllerEnabled = enabled && isCursorVisible(); 589 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 590 591 if (!mInsertionControllerEnabled) { 592 hideInsertionPointCursorController(); 593 if (mInsertionPointCursorController != null) { 594 mInsertionPointCursorController.onDetached(); 595 mInsertionPointCursorController = null; 596 } 597 } 598 599 if (!mSelectionControllerEnabled) { 600 stopTextActionMode(); 601 if (mSelectionModifierCursorController != null) { 602 mSelectionModifierCursorController.onDetached(); 603 mSelectionModifierCursorController = null; 604 } 605 } 606 } 607 608 void hideInsertionPointCursorController() { 609 if (mInsertionPointCursorController != null) { 610 mInsertionPointCursorController.hide(); 611 } 612 } 613 614 /** 615 * Hides the insertion controller and stops text selection mode, hiding the selection controller 616 */ 617 void hideControllers() { 618 hideCursorControllers(); 619 hideSpanControllers(); 620 } 621 622 private void hideSpanControllers() { 623 if (mSpanController != null) { 624 mSpanController.hide(); 625 } 626 } 627 628 private void hideCursorControllers() { 629 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 630 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 631 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 632 // to distinguish one from the other. 633 if (mSuggestionsPopupWindow != null && ((mTextView instanceof ExtractEditText) || 634 !mSuggestionsPopupWindow.isShowingUp())) { 635 // Should be done before hide insertion point controller since it triggers a show of it 636 mSuggestionsPopupWindow.hide(); 637 } 638 hideInsertionPointCursorController(); 639 } 640 641 /** 642 * Create new SpellCheckSpans on the modified region. 643 */ 644 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 645 // Remove spans whose adjacent characters are text not punctuation 646 mTextView.removeAdjacentSuggestionSpans(start); 647 mTextView.removeAdjacentSuggestionSpans(end); 648 649 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 650 !(mTextView instanceof ExtractEditText)) { 651 if (mSpellChecker == null && createSpellChecker) { 652 mSpellChecker = new SpellChecker(mTextView); 653 } 654 if (mSpellChecker != null) { 655 mSpellChecker.spellCheck(start, end); 656 } 657 } 658 } 659 660 void onScreenStateChanged(int screenState) { 661 switch (screenState) { 662 case View.SCREEN_STATE_ON: 663 resumeBlink(); 664 break; 665 case View.SCREEN_STATE_OFF: 666 suspendBlink(); 667 break; 668 } 669 } 670 671 private void suspendBlink() { 672 if (mBlink != null) { 673 mBlink.cancel(); 674 } 675 } 676 677 private void resumeBlink() { 678 if (mBlink != null) { 679 mBlink.uncancel(); 680 makeBlink(); 681 } 682 } 683 684 void adjustInputType(boolean password, boolean passwordInputType, 685 boolean webPasswordInputType, boolean numberPasswordInputType) { 686 // mInputType has been set from inputType, possibly modified by mInputMethod. 687 // Specialize mInputType to [web]password if we have a text class and the original input 688 // type was a password. 689 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 690 if (password || passwordInputType) { 691 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 692 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 693 } 694 if (webPasswordInputType) { 695 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 696 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 697 } 698 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 699 if (numberPasswordInputType) { 700 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 701 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 702 } 703 } 704 } 705 706 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 707 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 708 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 709 710 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 711 com.android.internal.R.dimen.textview_error_popup_default_width); 712 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 713 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 714 float max = 0; 715 for (int i = 0; i < l.getLineCount(); i++) { 716 max = Math.max(max, l.getLineWidth(i)); 717 } 718 719 /* 720 * Now set the popup size to be big enough for the text plus the border capped 721 * to DEFAULT_MAX_POPUP_WIDTH 722 */ 723 pop.setWidth(wid + (int) Math.ceil(max)); 724 pop.setHeight(ht + l.getHeight()); 725 } 726 727 void setFrame() { 728 if (mErrorPopup != null) { 729 TextView tv = (TextView) mErrorPopup.getContentView(); 730 chooseSize(mErrorPopup, mError, tv); 731 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 732 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 733 } 734 } 735 736 private int getWordStart(int offset) { 737 // FIXME - For this and similar methods we're not doing anything to check if there's 738 // a LocaleSpan in the text, this may be something we should try handling or checking for. 739 int retOffset = getWordIteratorWithText().prevBoundary(offset); 740 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 741 // On punctuation boundary or within group of punctuation, find punctuation start. 742 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 743 } else { 744 // Not on a punctuation boundary, find the word start. 745 retOffset = getWordIteratorWithText().getBeginning(offset); 746 } 747 if (retOffset == BreakIterator.DONE) { 748 return offset; 749 } 750 return retOffset; 751 } 752 753 private int getWordEnd(int offset) { 754 int retOffset = getWordIteratorWithText().nextBoundary(offset); 755 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 756 // On punctuation boundary or within group of punctuation, find punctuation end. 757 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 758 } else { 759 // Not on a punctuation boundary, find the word end. 760 retOffset = getWordIteratorWithText().getEnd(offset); 761 } 762 if (retOffset == BreakIterator.DONE) { 763 return offset; 764 } 765 return retOffset; 766 } 767 768 /** 769 * Adjusts selection to the word under last touch offset. Return true if the operation was 770 * successfully performed. 771 */ 772 private boolean selectCurrentWord() { 773 if (!mTextView.canSelectText()) { 774 return false; 775 } 776 777 if (mTextView.hasPasswordTransformationMethod()) { 778 // Always select all on a password field. 779 // Cut/copy menu entries are not available for passwords, but being able to select all 780 // is however useful to delete or paste to replace the entire content. 781 return mTextView.selectAllText(); 782 } 783 784 int inputType = mTextView.getInputType(); 785 int klass = inputType & InputType.TYPE_MASK_CLASS; 786 int variation = inputType & InputType.TYPE_MASK_VARIATION; 787 788 // Specific text field types: select the entire text for these 789 if (klass == InputType.TYPE_CLASS_NUMBER || 790 klass == InputType.TYPE_CLASS_PHONE || 791 klass == InputType.TYPE_CLASS_DATETIME || 792 variation == InputType.TYPE_TEXT_VARIATION_URI || 793 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 794 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 795 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 796 return mTextView.selectAllText(); 797 } 798 799 long lastTouchOffsets = getLastTouchOffsets(); 800 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 801 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 802 803 // Safety check in case standard touch event handling has been bypassed 804 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 805 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 806 807 int selectionStart, selectionEnd; 808 809 // If a URLSpan (web address, email, phone...) is found at that position, select it. 810 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 811 getSpans(minOffset, maxOffset, URLSpan.class); 812 if (urlSpans.length >= 1) { 813 URLSpan urlSpan = urlSpans[0]; 814 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 815 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 816 } else { 817 // FIXME - We should check if there's a LocaleSpan in the text, this may be 818 // something we should try handling or checking for. 819 final WordIterator wordIterator = getWordIterator(); 820 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 821 822 selectionStart = wordIterator.getBeginning(minOffset); 823 selectionEnd = wordIterator.getEnd(maxOffset); 824 825 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 826 selectionStart == selectionEnd) { 827 // Possible when the word iterator does not properly handle the text's language 828 long range = getCharClusterRange(minOffset); 829 selectionStart = TextUtils.unpackRangeStartFromLong(range); 830 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 831 } 832 } 833 834 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 835 return selectionEnd > selectionStart; 836 } 837 838 void onLocaleChanged() { 839 // Will be re-created on demand in getWordIterator with the proper new locale 840 mWordIterator = null; 841 mWordIteratorWithText = null; 842 } 843 844 /** 845 * @hide 846 */ 847 public WordIterator getWordIterator() { 848 if (mWordIterator == null) { 849 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 850 } 851 return mWordIterator; 852 } 853 854 private WordIterator getWordIteratorWithText() { 855 if (mWordIteratorWithText == null) { 856 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 857 mUpdateWordIteratorText = true; 858 } 859 if (mUpdateWordIteratorText) { 860 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 861 // to the user's selection is needed. A possible solution would be to 862 // copy some number N of characters near the selection and then when the 863 // user approaches N then we'd do another copy of the next N characters. 864 CharSequence text = mTextView.getText(); 865 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 866 mUpdateWordIteratorText = false; 867 } 868 return mWordIteratorWithText; 869 } 870 871 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 872 final Layout layout = mTextView.getLayout(); 873 if (layout == null) return offset; 874 final CharSequence text = mTextView.getText(); 875 final int nextOffset = layout.getPaint().getTextRunCursor(text, 0, text.length(), 876 layout.isRtlCharAt(offset) ? Paint.DIRECTION_RTL : Paint.DIRECTION_LTR, 877 offset, findAfterGivenOffset ? Paint.CURSOR_AFTER : Paint.CURSOR_BEFORE); 878 return nextOffset == -1 ? offset : nextOffset; 879 } 880 881 private long getCharClusterRange(int offset) { 882 final int textLength = mTextView.getText().length(); 883 if (offset < textLength) { 884 return TextUtils.packRangeInLong(offset, getNextCursorOffset(offset, true)); 885 } 886 if (offset - 1 >= 0) { 887 return TextUtils.packRangeInLong(getNextCursorOffset(offset, false), offset); 888 } 889 return TextUtils.packRangeInLong(offset, offset); 890 } 891 892 private boolean touchPositionIsInSelection() { 893 int selectionStart = mTextView.getSelectionStart(); 894 int selectionEnd = mTextView.getSelectionEnd(); 895 896 if (selectionStart == selectionEnd) { 897 return false; 898 } 899 900 if (selectionStart > selectionEnd) { 901 int tmp = selectionStart; 902 selectionStart = selectionEnd; 903 selectionEnd = tmp; 904 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 905 } 906 907 SelectionModifierCursorController selectionController = getSelectionController(); 908 int minOffset = selectionController.getMinTouchOffset(); 909 int maxOffset = selectionController.getMaxTouchOffset(); 910 911 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 912 } 913 914 private PositionListener getPositionListener() { 915 if (mPositionListener == null) { 916 mPositionListener = new PositionListener(); 917 } 918 return mPositionListener; 919 } 920 921 private interface TextViewPositionListener { 922 public void updatePosition(int parentPositionX, int parentPositionY, 923 boolean parentPositionChanged, boolean parentScrolled); 924 } 925 926 private boolean isPositionVisible(final float positionX, final float positionY) { 927 synchronized (TEMP_POSITION) { 928 final float[] position = TEMP_POSITION; 929 position[0] = positionX; 930 position[1] = positionY; 931 View view = mTextView; 932 933 while (view != null) { 934 if (view != mTextView) { 935 // Local scroll is already taken into account in positionX/Y 936 position[0] -= view.getScrollX(); 937 position[1] -= view.getScrollY(); 938 } 939 940 if (position[0] < 0 || position[1] < 0 || 941 position[0] > view.getWidth() || position[1] > view.getHeight()) { 942 return false; 943 } 944 945 if (!view.getMatrix().isIdentity()) { 946 view.getMatrix().mapPoints(position); 947 } 948 949 position[0] += view.getLeft(); 950 position[1] += view.getTop(); 951 952 final ViewParent parent = view.getParent(); 953 if (parent instanceof View) { 954 view = (View) parent; 955 } else { 956 // We've reached the ViewRoot, stop iterating 957 view = null; 958 } 959 } 960 } 961 962 // We've been able to walk up the view hierarchy and the position was never clipped 963 return true; 964 } 965 966 private boolean isOffsetVisible(int offset) { 967 Layout layout = mTextView.getLayout(); 968 if (layout == null) return false; 969 970 final int line = layout.getLineForOffset(offset); 971 final int lineBottom = layout.getLineBottom(line); 972 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 973 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 974 lineBottom + mTextView.viewportToContentVerticalOffset()); 975 } 976 977 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 978 * in the view. Returns false when the position is in the empty space of left/right of text. 979 */ 980 private boolean isPositionOnText(float x, float y) { 981 Layout layout = mTextView.getLayout(); 982 if (layout == null) return false; 983 984 final int line = mTextView.getLineAtCoordinate(y); 985 x = mTextView.convertToLocalHorizontalCoordinate(x); 986 987 if (x < layout.getLineLeft(line)) return false; 988 if (x > layout.getLineRight(line)) return false; 989 return true; 990 } 991 992 public boolean performLongClick(boolean handled) { 993 // Long press in empty space moves cursor and starts the selection action mode. 994 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 995 mInsertionControllerEnabled) { 996 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 997 mLastDownPositionY); 998 stopTextActionMode(); 999 Selection.setSelection((Spannable) mTextView.getText(), offset); 1000 getInsertionController().show(); 1001 startInsertionActionMode(); 1002 handled = true; 1003 } 1004 1005 if (!handled && mTextActionMode != null) { 1006 if (touchPositionIsInSelection()) { 1007 // Start a drag 1008 final int start = mTextView.getSelectionStart(); 1009 final int end = mTextView.getSelectionEnd(); 1010 CharSequence selectedText = mTextView.getTransformedText(start, end); 1011 ClipData data = ClipData.newPlainText(null, selectedText); 1012 DragLocalState localState = new DragLocalState(mTextView, start, end); 1013 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 1014 View.DRAG_FLAG_GLOBAL); 1015 stopTextActionMode(); 1016 } else { 1017 stopTextActionMode(); 1018 selectCurrentWordAndStartDrag(); 1019 } 1020 handled = true; 1021 } 1022 1023 // Start a new selection 1024 if (!handled) { 1025 handled = selectCurrentWordAndStartDrag(); 1026 } 1027 1028 return handled; 1029 } 1030 1031 private long getLastTouchOffsets() { 1032 SelectionModifierCursorController selectionController = getSelectionController(); 1033 final int minOffset = selectionController.getMinTouchOffset(); 1034 final int maxOffset = selectionController.getMaxTouchOffset(); 1035 return TextUtils.packRangeInLong(minOffset, maxOffset); 1036 } 1037 1038 void onFocusChanged(boolean focused, int direction) { 1039 mShowCursor = SystemClock.uptimeMillis(); 1040 ensureEndedBatchEdit(); 1041 1042 if (focused) { 1043 int selStart = mTextView.getSelectionStart(); 1044 int selEnd = mTextView.getSelectionEnd(); 1045 1046 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1047 // mode for these, unless there was a specific selection already started. 1048 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1049 selEnd == mTextView.getText().length(); 1050 1051 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1052 !isFocusHighlighted; 1053 1054 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1055 // If a tap was used to give focus to that view, move cursor at tap position. 1056 // Has to be done before onTakeFocus, which can be overloaded. 1057 final int lastTapPosition = getLastTapPosition(); 1058 if (lastTapPosition >= 0) { 1059 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1060 } 1061 1062 // Note this may have to be moved out of the Editor class 1063 MovementMethod mMovement = mTextView.getMovementMethod(); 1064 if (mMovement != null) { 1065 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1066 } 1067 1068 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1069 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1070 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1071 // This special case ensure that we keep current selection in that case. 1072 // It would be better to know why the DecorView does not have focus at that time. 1073 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1074 selStart >= 0 && selEnd >= 0) { 1075 /* 1076 * Someone intentionally set the selection, so let them 1077 * do whatever it is that they wanted to do instead of 1078 * the default on-focus behavior. We reset the selection 1079 * here instead of just skipping the onTakeFocus() call 1080 * because some movement methods do something other than 1081 * just setting the selection in theirs and we still 1082 * need to go through that path. 1083 */ 1084 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1085 } 1086 1087 if (mSelectAllOnFocus) { 1088 mTextView.selectAllText(); 1089 } 1090 1091 mTouchFocusSelected = true; 1092 } 1093 1094 mFrozenWithFocus = false; 1095 mSelectionMoved = false; 1096 1097 if (mError != null) { 1098 showError(); 1099 } 1100 1101 makeBlink(); 1102 } else { 1103 if (mError != null) { 1104 hideError(); 1105 } 1106 // Don't leave us in the middle of a batch edit. 1107 mTextView.onEndBatchEdit(); 1108 1109 if (mTextView instanceof ExtractEditText) { 1110 // terminateTextSelectionMode removes selection, which we want to keep when 1111 // ExtractEditText goes out of focus. 1112 final int selStart = mTextView.getSelectionStart(); 1113 final int selEnd = mTextView.getSelectionEnd(); 1114 hideControllers(); 1115 stopTextActionMode(); 1116 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1117 } else { 1118 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1119 hideControllers(); 1120 stopTextActionMode(); 1121 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1122 downgradeEasyCorrectionSpans(); 1123 } 1124 1125 // No need to create the controller 1126 if (mSelectionModifierCursorController != null) { 1127 mSelectionModifierCursorController.resetTouchOffsets(); 1128 } 1129 } 1130 } 1131 1132 /** 1133 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1134 * span. 1135 */ 1136 private void downgradeEasyCorrectionSpans() { 1137 CharSequence text = mTextView.getText(); 1138 if (text instanceof Spannable) { 1139 Spannable spannable = (Spannable) text; 1140 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1141 spannable.length(), SuggestionSpan.class); 1142 for (int i = 0; i < suggestionSpans.length; i++) { 1143 int flags = suggestionSpans[i].getFlags(); 1144 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1145 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1146 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1147 suggestionSpans[i].setFlags(flags); 1148 } 1149 } 1150 } 1151 } 1152 1153 void sendOnTextChanged(int start, int after) { 1154 updateSpellCheckSpans(start, start + after, false); 1155 1156 // Flip flag to indicate the word iterator needs to have the text reset. 1157 mUpdateWordIteratorText = true; 1158 1159 // Hide the controllers as soon as text is modified (typing, procedural...) 1160 // We do not hide the span controllers, since they can be added when a new text is 1161 // inserted into the text view (voice IME). 1162 hideCursorControllers(); 1163 stopTextActionMode(); 1164 } 1165 1166 private int getLastTapPosition() { 1167 // No need to create the controller at that point, no last tap position saved 1168 if (mSelectionModifierCursorController != null) { 1169 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1170 if (lastTapPosition >= 0) { 1171 // Safety check, should not be possible. 1172 if (lastTapPosition > mTextView.getText().length()) { 1173 lastTapPosition = mTextView.getText().length(); 1174 } 1175 return lastTapPosition; 1176 } 1177 } 1178 1179 return -1; 1180 } 1181 1182 void onWindowFocusChanged(boolean hasWindowFocus) { 1183 if (hasWindowFocus) { 1184 if (mBlink != null) { 1185 mBlink.uncancel(); 1186 makeBlink(); 1187 } 1188 } else { 1189 if (mBlink != null) { 1190 mBlink.cancel(); 1191 } 1192 if (mInputContentType != null) { 1193 mInputContentType.enterDown = false; 1194 } 1195 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1196 hideControllers(); 1197 if (mSuggestionsPopupWindow != null) { 1198 mSuggestionsPopupWindow.onParentLostFocus(); 1199 } 1200 1201 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1202 ensureEndedBatchEdit(); 1203 } 1204 } 1205 1206 void onTouchEvent(MotionEvent event) { 1207 updateFloatingToolbarVisibility(event); 1208 1209 if (hasSelectionController()) { 1210 getSelectionController().onTouchEvent(event); 1211 } 1212 1213 if (mShowSuggestionRunnable != null) { 1214 mTextView.removeCallbacks(mShowSuggestionRunnable); 1215 mShowSuggestionRunnable = null; 1216 } 1217 1218 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1219 mLastDownPositionX = event.getX(); 1220 mLastDownPositionY = event.getY(); 1221 1222 // Reset this state; it will be re-set if super.onTouchEvent 1223 // causes focus to move to the view. 1224 mTouchFocusSelected = false; 1225 mIgnoreActionUpEvent = false; 1226 } 1227 } 1228 1229 private void updateFloatingToolbarVisibility(MotionEvent event) { 1230 if (mTextActionMode != null) { 1231 switch (event.getActionMasked()) { 1232 case MotionEvent.ACTION_MOVE: 1233 hideFloatingToolbar(); 1234 break; 1235 case MotionEvent.ACTION_UP: // fall through 1236 case MotionEvent.ACTION_CANCEL: 1237 showFloatingToolbar(); 1238 } 1239 } 1240 } 1241 1242 private void hideFloatingToolbar() { 1243 if (mTextActionMode != null) { 1244 mTextView.removeCallbacks(mShowFloatingToolbar); 1245 // Delay the "hide" a little bit just in case a "show" will happen almost immediately. 1246 mTextView.postDelayed(mHideFloatingToolbar, 100); 1247 } 1248 } 1249 1250 private void showFloatingToolbar() { 1251 if (mTextActionMode != null) { 1252 mTextView.removeCallbacks(mHideFloatingToolbar); 1253 // Delay "show" so it doesn't interfere with click confirmations 1254 // or double-clicks that could "dismiss" the floating toolbar. 1255 int delay = ViewConfiguration.getDoubleTapTimeout(); 1256 mTextView.postDelayed(mShowFloatingToolbar, delay); 1257 } 1258 } 1259 1260 public void beginBatchEdit() { 1261 mInBatchEditControllers = true; 1262 final InputMethodState ims = mInputMethodState; 1263 if (ims != null) { 1264 int nesting = ++ims.mBatchEditNesting; 1265 if (nesting == 1) { 1266 ims.mCursorChanged = false; 1267 ims.mChangedDelta = 0; 1268 if (ims.mContentChanged) { 1269 // We already have a pending change from somewhere else, 1270 // so turn this into a full update. 1271 ims.mChangedStart = 0; 1272 ims.mChangedEnd = mTextView.getText().length(); 1273 } else { 1274 ims.mChangedStart = EXTRACT_UNKNOWN; 1275 ims.mChangedEnd = EXTRACT_UNKNOWN; 1276 ims.mContentChanged = false; 1277 } 1278 mUndoInputFilter.beginBatchEdit(); 1279 mTextView.onBeginBatchEdit(); 1280 } 1281 } 1282 } 1283 1284 public void endBatchEdit() { 1285 mInBatchEditControllers = false; 1286 final InputMethodState ims = mInputMethodState; 1287 if (ims != null) { 1288 int nesting = --ims.mBatchEditNesting; 1289 if (nesting == 0) { 1290 finishBatchEdit(ims); 1291 } 1292 } 1293 } 1294 1295 void ensureEndedBatchEdit() { 1296 final InputMethodState ims = mInputMethodState; 1297 if (ims != null && ims.mBatchEditNesting != 0) { 1298 ims.mBatchEditNesting = 0; 1299 finishBatchEdit(ims); 1300 } 1301 } 1302 1303 void finishBatchEdit(final InputMethodState ims) { 1304 mTextView.onEndBatchEdit(); 1305 mUndoInputFilter.endBatchEdit(); 1306 1307 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1308 mTextView.updateAfterEdit(); 1309 reportExtractedText(); 1310 } else if (ims.mCursorChanged) { 1311 // Cheesy way to get us to report the current cursor location. 1312 mTextView.invalidateCursor(); 1313 } 1314 // sendUpdateSelection knows to avoid sending if the selection did 1315 // not actually change. 1316 sendUpdateSelection(); 1317 } 1318 1319 static final int EXTRACT_NOTHING = -2; 1320 static final int EXTRACT_UNKNOWN = -1; 1321 1322 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1323 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1324 EXTRACT_UNKNOWN, outText); 1325 } 1326 1327 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1328 int partialStartOffset, int partialEndOffset, int delta, 1329 @Nullable ExtractedText outText) { 1330 if (request == null || outText == null) { 1331 return false; 1332 } 1333 1334 final CharSequence content = mTextView.getText(); 1335 if (content == null) { 1336 return false; 1337 } 1338 1339 if (partialStartOffset != EXTRACT_NOTHING) { 1340 final int N = content.length(); 1341 if (partialStartOffset < 0) { 1342 outText.partialStartOffset = outText.partialEndOffset = -1; 1343 partialStartOffset = 0; 1344 partialEndOffset = N; 1345 } else { 1346 // Now use the delta to determine the actual amount of text 1347 // we need. 1348 partialEndOffset += delta; 1349 // Adjust offsets to ensure we contain full spans. 1350 if (content instanceof Spanned) { 1351 Spanned spanned = (Spanned)content; 1352 Object[] spans = spanned.getSpans(partialStartOffset, 1353 partialEndOffset, ParcelableSpan.class); 1354 int i = spans.length; 1355 while (i > 0) { 1356 i--; 1357 int j = spanned.getSpanStart(spans[i]); 1358 if (j < partialStartOffset) partialStartOffset = j; 1359 j = spanned.getSpanEnd(spans[i]); 1360 if (j > partialEndOffset) partialEndOffset = j; 1361 } 1362 } 1363 outText.partialStartOffset = partialStartOffset; 1364 outText.partialEndOffset = partialEndOffset - delta; 1365 1366 if (partialStartOffset > N) { 1367 partialStartOffset = N; 1368 } else if (partialStartOffset < 0) { 1369 partialStartOffset = 0; 1370 } 1371 if (partialEndOffset > N) { 1372 partialEndOffset = N; 1373 } else if (partialEndOffset < 0) { 1374 partialEndOffset = 0; 1375 } 1376 } 1377 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1378 outText.text = content.subSequence(partialStartOffset, 1379 partialEndOffset); 1380 } else { 1381 outText.text = TextUtils.substring(content, partialStartOffset, 1382 partialEndOffset); 1383 } 1384 } else { 1385 outText.partialStartOffset = 0; 1386 outText.partialEndOffset = 0; 1387 outText.text = ""; 1388 } 1389 outText.flags = 0; 1390 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1391 outText.flags |= ExtractedText.FLAG_SELECTING; 1392 } 1393 if (mTextView.isSingleLine()) { 1394 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1395 } 1396 outText.startOffset = 0; 1397 outText.selectionStart = mTextView.getSelectionStart(); 1398 outText.selectionEnd = mTextView.getSelectionEnd(); 1399 return true; 1400 } 1401 1402 boolean reportExtractedText() { 1403 final Editor.InputMethodState ims = mInputMethodState; 1404 if (ims != null) { 1405 final boolean contentChanged = ims.mContentChanged; 1406 if (contentChanged || ims.mSelectionModeChanged) { 1407 ims.mContentChanged = false; 1408 ims.mSelectionModeChanged = false; 1409 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1410 if (req != null) { 1411 InputMethodManager imm = InputMethodManager.peekInstance(); 1412 if (imm != null) { 1413 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1414 "Retrieving extracted start=" + ims.mChangedStart + 1415 " end=" + ims.mChangedEnd + 1416 " delta=" + ims.mChangedDelta); 1417 if (ims.mChangedStart < 0 && !contentChanged) { 1418 ims.mChangedStart = EXTRACT_NOTHING; 1419 } 1420 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1421 ims.mChangedDelta, ims.mExtractedText)) { 1422 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1423 "Reporting extracted start=" + 1424 ims.mExtractedText.partialStartOffset + 1425 " end=" + ims.mExtractedText.partialEndOffset + 1426 ": " + ims.mExtractedText.text); 1427 1428 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1429 ims.mChangedStart = EXTRACT_UNKNOWN; 1430 ims.mChangedEnd = EXTRACT_UNKNOWN; 1431 ims.mChangedDelta = 0; 1432 ims.mContentChanged = false; 1433 return true; 1434 } 1435 } 1436 } 1437 } 1438 } 1439 return false; 1440 } 1441 1442 private void sendUpdateSelection() { 1443 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1444 final InputMethodManager imm = InputMethodManager.peekInstance(); 1445 if (null != imm) { 1446 final int selectionStart = mTextView.getSelectionStart(); 1447 final int selectionEnd = mTextView.getSelectionEnd(); 1448 int candStart = -1; 1449 int candEnd = -1; 1450 if (mTextView.getText() instanceof Spannable) { 1451 final Spannable sp = (Spannable) mTextView.getText(); 1452 candStart = EditableInputConnection.getComposingSpanStart(sp); 1453 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1454 } 1455 // InputMethodManager#updateSelection skips sending the message if 1456 // none of the parameters have changed since the last time we called it. 1457 imm.updateSelection(mTextView, 1458 selectionStart, selectionEnd, candStart, candEnd); 1459 } 1460 } 1461 } 1462 1463 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1464 int cursorOffsetVertical) { 1465 final int selectionStart = mTextView.getSelectionStart(); 1466 final int selectionEnd = mTextView.getSelectionEnd(); 1467 1468 final InputMethodState ims = mInputMethodState; 1469 if (ims != null && ims.mBatchEditNesting == 0) { 1470 InputMethodManager imm = InputMethodManager.peekInstance(); 1471 if (imm != null) { 1472 if (imm.isActive(mTextView)) { 1473 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1474 // We are in extract mode and the content has changed 1475 // in some way... just report complete new text to the 1476 // input method. 1477 reportExtractedText(); 1478 } 1479 } 1480 } 1481 } 1482 1483 if (mCorrectionHighlighter != null) { 1484 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1485 } 1486 1487 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1488 drawCursor(canvas, cursorOffsetVertical); 1489 // Rely on the drawable entirely, do not draw the cursor line. 1490 // Has to be done after the IMM related code above which relies on the highlight. 1491 highlight = null; 1492 } 1493 1494 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1495 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1496 cursorOffsetVertical); 1497 } else { 1498 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1499 } 1500 } 1501 1502 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1503 Paint highlightPaint, int cursorOffsetVertical) { 1504 final long lineRange = layout.getLineRangeForDraw(canvas); 1505 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1506 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1507 if (lastLine < 0) return; 1508 1509 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1510 firstLine, lastLine); 1511 1512 if (layout instanceof DynamicLayout) { 1513 if (mTextRenderNodes == null) { 1514 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1515 } 1516 1517 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1518 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1519 int[] blockIndices = dynamicLayout.getBlockIndices(); 1520 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1521 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1522 1523 int endOfPreviousBlock = -1; 1524 int searchStartIndex = 0; 1525 for (int i = 0; i < numberOfBlocks; i++) { 1526 int blockEndLine = blockEndLines[i]; 1527 int blockIndex = blockIndices[i]; 1528 1529 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1530 if (blockIsInvalid) { 1531 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1532 searchStartIndex); 1533 // Note how dynamic layout's internal block indices get updated from Editor 1534 blockIndices[i] = blockIndex; 1535 if (mTextRenderNodes[blockIndex] != null) { 1536 mTextRenderNodes[blockIndex].isDirty = true; 1537 } 1538 searchStartIndex = blockIndex + 1; 1539 } 1540 1541 if (mTextRenderNodes[blockIndex] == null) { 1542 mTextRenderNodes[blockIndex] = 1543 new TextRenderNode("Text " + blockIndex); 1544 } 1545 1546 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1547 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1548 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1549 final int blockBeginLine = endOfPreviousBlock + 1; 1550 final int top = layout.getLineTop(blockBeginLine); 1551 final int bottom = layout.getLineBottom(blockEndLine); 1552 int left = 0; 1553 int right = mTextView.getWidth(); 1554 if (mTextView.getHorizontallyScrolling()) { 1555 float min = Float.MAX_VALUE; 1556 float max = Float.MIN_VALUE; 1557 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1558 min = Math.min(min, layout.getLineLeft(line)); 1559 max = Math.max(max, layout.getLineRight(line)); 1560 } 1561 left = (int) min; 1562 right = (int) (max + 0.5f); 1563 } 1564 1565 // Rebuild display list if it is invalid 1566 if (blockDisplayListIsInvalid) { 1567 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1568 right - left, bottom - top); 1569 try { 1570 // drawText is always relative to TextView's origin, this translation 1571 // brings this range of text back to the top left corner of the viewport 1572 displayListCanvas.translate(-left, -top); 1573 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1574 mTextRenderNodes[blockIndex].isDirty = false; 1575 // No need to untranslate, previous context is popped after 1576 // drawDisplayList 1577 } finally { 1578 blockDisplayList.end(displayListCanvas); 1579 // Same as drawDisplayList below, handled by our TextView's parent 1580 blockDisplayList.setClipToBounds(false); 1581 } 1582 } 1583 1584 // Valid disply list whose index is >= indexFirstChangedBlock 1585 // only needs to update its drawing location. 1586 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1587 } 1588 1589 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1590 1591 endOfPreviousBlock = blockEndLine; 1592 } 1593 1594 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1595 } else { 1596 // Boring layout is used for empty and hint text 1597 layout.drawText(canvas, firstLine, lastLine); 1598 } 1599 } 1600 1601 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1602 int searchStartIndex) { 1603 int length = mTextRenderNodes.length; 1604 for (int i = searchStartIndex; i < length; i++) { 1605 boolean blockIndexFound = false; 1606 for (int j = 0; j < numberOfBlocks; j++) { 1607 if (blockIndices[j] == i) { 1608 blockIndexFound = true; 1609 break; 1610 } 1611 } 1612 if (blockIndexFound) continue; 1613 return i; 1614 } 1615 1616 // No available index found, the pool has to grow 1617 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1618 return length; 1619 } 1620 1621 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1622 final boolean translate = cursorOffsetVertical != 0; 1623 if (translate) canvas.translate(0, cursorOffsetVertical); 1624 for (int i = 0; i < mCursorCount; i++) { 1625 mCursorDrawable[i].draw(canvas); 1626 } 1627 if (translate) canvas.translate(0, -cursorOffsetVertical); 1628 } 1629 1630 /** 1631 * Invalidates all the sub-display lists that overlap the specified character range 1632 */ 1633 void invalidateTextDisplayList(Layout layout, int start, int end) { 1634 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1635 final int firstLine = layout.getLineForOffset(start); 1636 final int lastLine = layout.getLineForOffset(end); 1637 1638 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1639 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1640 int[] blockIndices = dynamicLayout.getBlockIndices(); 1641 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1642 1643 int i = 0; 1644 // Skip the blocks before firstLine 1645 while (i < numberOfBlocks) { 1646 if (blockEndLines[i] >= firstLine) break; 1647 i++; 1648 } 1649 1650 // Invalidate all subsequent blocks until lastLine is passed 1651 while (i < numberOfBlocks) { 1652 final int blockIndex = blockIndices[i]; 1653 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1654 mTextRenderNodes[blockIndex].isDirty = true; 1655 } 1656 if (blockEndLines[i] >= lastLine) break; 1657 i++; 1658 } 1659 } 1660 } 1661 1662 void invalidateTextDisplayList() { 1663 if (mTextRenderNodes != null) { 1664 for (int i = 0; i < mTextRenderNodes.length; i++) { 1665 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1666 } 1667 } 1668 } 1669 1670 void updateCursorsPositions() { 1671 if (mTextView.mCursorDrawableRes == 0) { 1672 mCursorCount = 0; 1673 return; 1674 } 1675 1676 Layout layout = mTextView.getLayout(); 1677 Layout hintLayout = mTextView.getHintLayout(); 1678 final int offset = mTextView.getSelectionStart(); 1679 final int line = layout.getLineForOffset(offset); 1680 final int top = layout.getLineTop(line); 1681 final int bottom = layout.getLineTop(line + 1); 1682 1683 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1684 1685 int middle = bottom; 1686 if (mCursorCount == 2) { 1687 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1688 middle = (top + bottom) >> 1; 1689 } 1690 1691 boolean clamped = layout.shouldClampCursor(line); 1692 updateCursorPosition(0, top, middle, 1693 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1694 1695 if (mCursorCount == 2) { 1696 updateCursorPosition(1, middle, bottom, 1697 layout.getSecondaryHorizontal(offset, clamped)); 1698 } 1699 } 1700 1701 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1702 boolean clamped) { 1703 if (TextUtils.isEmpty(layout.getText()) && 1704 hintLayout != null && 1705 !TextUtils.isEmpty(hintLayout.getText())) { 1706 return hintLayout.getPrimaryHorizontal(offset, clamped); 1707 } else { 1708 return layout.getPrimaryHorizontal(offset, clamped); 1709 } 1710 } 1711 1712 /** 1713 * @return true if the selection mode was actually started. 1714 */ 1715 private boolean startInsertionActionMode() { 1716 if (mInsertionActionModeRunnable != null) { 1717 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1718 } 1719 if (extractedTextModeWillBeStarted()) { 1720 return false; 1721 } 1722 stopTextActionMode(); 1723 1724 ActionMode.Callback actionModeCallback = 1725 new TextActionModeCallback(false /* hasSelection */); 1726 mTextActionMode = mTextView.startActionMode( 1727 actionModeCallback, ActionMode.TYPE_FLOATING); 1728 return mTextActionMode != null; 1729 } 1730 1731 /** 1732 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1733 * are shown if there is a selection, otherwise the insertion handle is shown. This should be 1734 * used when the mode is started from a non-touch event. 1735 * 1736 * @return true if the selection mode was actually started. 1737 */ 1738 boolean startSelectionActionMode() { 1739 boolean selectionStarted = startSelectionActionModeInternal(); 1740 if (selectionStarted) { 1741 getSelectionController().show(); 1742 } else if (getInsertionController() != null) { 1743 getInsertionController().show(); 1744 } 1745 return selectionStarted; 1746 } 1747 1748 /** 1749 * If the TextView allows text selection, selects the current word when no existing selection 1750 * was available and starts a drag. 1751 * 1752 * @return true if the drag was started. 1753 */ 1754 private boolean selectCurrentWordAndStartDrag() { 1755 if (extractedTextModeWillBeStarted()) { 1756 // Cancel the single tap delayed runnable. 1757 if (mInsertionActionModeRunnable != null) { 1758 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1759 } 1760 return false; 1761 } 1762 if (mTextActionMode != null) { 1763 mTextActionMode.finish(); 1764 } 1765 if (!checkFieldAndSelectCurrentWord()) { 1766 return false; 1767 } 1768 getSelectionController().enterDrag(); 1769 return true; 1770 } 1771 1772 /** 1773 * Checks whether a selection can be performed on the current TextView and if so selects 1774 * the current word. 1775 * 1776 * @return true if there already was a selection or if the current word was selected. 1777 */ 1778 private boolean checkFieldAndSelectCurrentWord() { 1779 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1780 Log.w(TextView.LOG_TAG, 1781 "TextView does not support text selection. Selection cancelled."); 1782 return false; 1783 } 1784 1785 if (!mTextView.hasSelection()) { 1786 // There may already be a selection on device rotation 1787 return selectCurrentWord(); 1788 } 1789 return true; 1790 } 1791 1792 private boolean startSelectionActionModeInternal() { 1793 if (mTextActionMode != null) { 1794 // Selection action mode is already started 1795 mTextActionMode.invalidate(); 1796 return false; 1797 } 1798 1799 if (!checkFieldAndSelectCurrentWord()) { 1800 return false; 1801 } 1802 1803 boolean willExtract = extractedTextModeWillBeStarted(); 1804 1805 // Do not start the action mode when extracted text will show up full screen, which would 1806 // immediately hide the newly created action bar and would be visually distracting. 1807 if (!willExtract) { 1808 ActionMode.Callback actionModeCallback = 1809 new TextActionModeCallback(true /* hasSelection */); 1810 mTextActionMode = mTextView.startActionMode( 1811 actionModeCallback, ActionMode.TYPE_FLOATING); 1812 } 1813 1814 final boolean selectionStarted = mTextActionMode != null || willExtract; 1815 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1816 // Show the IME to be able to replace text, except when selecting non editable text. 1817 final InputMethodManager imm = InputMethodManager.peekInstance(); 1818 if (imm != null) { 1819 imm.showSoftInput(mTextView, 0, null); 1820 } 1821 } 1822 return selectionStarted; 1823 } 1824 1825 private boolean extractedTextModeWillBeStarted() { 1826 if (!(mTextView instanceof ExtractEditText)) { 1827 final InputMethodManager imm = InputMethodManager.peekInstance(); 1828 return imm != null && imm.isFullscreenMode(); 1829 } 1830 return false; 1831 } 1832 1833 /** 1834 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1835 * the current cursor position or selection range. This method is consistent with the 1836 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1837 */ 1838 private boolean shouldOfferToShowSuggestions() { 1839 CharSequence text = mTextView.getText(); 1840 if (!(text instanceof Spannable)) return false; 1841 1842 final Spannable spannable = (Spannable) text; 1843 final int selectionStart = mTextView.getSelectionStart(); 1844 final int selectionEnd = mTextView.getSelectionEnd(); 1845 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1846 SuggestionSpan.class); 1847 if (suggestionSpans.length == 0) { 1848 return false; 1849 } 1850 if (selectionStart == selectionEnd) { 1851 // Spans overlap the cursor. 1852 for (int i = 0; i < suggestionSpans.length; i++) { 1853 if (suggestionSpans[i].getSuggestions().length > 0) { 1854 return true; 1855 } 1856 } 1857 return false; 1858 } 1859 int minSpanStart = mTextView.getText().length(); 1860 int maxSpanEnd = 0; 1861 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1862 int unionOfSpansCoveringSelectionStartEnd = 0; 1863 boolean hasValidSuggestions = false; 1864 for (int i = 0; i < suggestionSpans.length; i++) { 1865 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1866 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1867 minSpanStart = Math.min(minSpanStart, spanStart); 1868 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1869 if (selectionStart < spanStart || selectionStart > spanEnd) { 1870 // The span doesn't cover the current selection start point. 1871 continue; 1872 } 1873 hasValidSuggestions = 1874 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 1875 unionOfSpansCoveringSelectionStartStart = 1876 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1877 unionOfSpansCoveringSelectionStartEnd = 1878 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1879 } 1880 if (!hasValidSuggestions) { 1881 return false; 1882 } 1883 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1884 // No spans cover the selection start point. 1885 return false; 1886 } 1887 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1888 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1889 // There is a span that is not covered by the union. In this case, we soouldn't offer 1890 // to show suggestions as it's confusing. 1891 return false; 1892 } 1893 return true; 1894 } 1895 1896 /** 1897 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1898 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1899 */ 1900 private boolean isCursorInsideEasyCorrectionSpan() { 1901 Spannable spannable = (Spannable) mTextView.getText(); 1902 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1903 mTextView.getSelectionEnd(), SuggestionSpan.class); 1904 for (int i = 0; i < suggestionSpans.length; i++) { 1905 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1906 return true; 1907 } 1908 } 1909 return false; 1910 } 1911 1912 void onTouchUpEvent(MotionEvent event) { 1913 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1914 hideControllers(); 1915 stopTextActionMode(); 1916 CharSequence text = mTextView.getText(); 1917 if (!selectAllGotFocus && text.length() > 0) { 1918 // Move cursor 1919 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1920 Selection.setSelection((Spannable) text, offset); 1921 if (mSpellChecker != null) { 1922 // When the cursor moves, the word that was typed may need spell check 1923 mSpellChecker.onSelectionChanged(); 1924 } 1925 1926 if (!extractedTextModeWillBeStarted()) { 1927 if (isCursorInsideEasyCorrectionSpan()) { 1928 // Cancel the single tap delayed runnable. 1929 if (mInsertionActionModeRunnable != null) { 1930 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1931 } 1932 1933 mShowSuggestionRunnable = new Runnable() { 1934 public void run() { 1935 showSuggestions(); 1936 } 1937 }; 1938 // removeCallbacks is performed on every touch 1939 mTextView.postDelayed(mShowSuggestionRunnable, 1940 ViewConfiguration.getDoubleTapTimeout()); 1941 } else if (hasInsertionController()) { 1942 getInsertionController().show(); 1943 } 1944 } 1945 } 1946 } 1947 1948 protected void stopTextActionMode() { 1949 if (mTextActionMode != null) { 1950 // This will hide the mSelectionModifierCursorController 1951 mTextActionMode.finish(); 1952 } 1953 } 1954 1955 /** 1956 * @return True if this view supports insertion handles. 1957 */ 1958 boolean hasInsertionController() { 1959 return mInsertionControllerEnabled; 1960 } 1961 1962 /** 1963 * @return True if this view supports selection handles. 1964 */ 1965 boolean hasSelectionController() { 1966 return mSelectionControllerEnabled; 1967 } 1968 1969 InsertionPointCursorController getInsertionController() { 1970 if (!mInsertionControllerEnabled) { 1971 return null; 1972 } 1973 1974 if (mInsertionPointCursorController == null) { 1975 mInsertionPointCursorController = new InsertionPointCursorController(); 1976 1977 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1978 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1979 } 1980 1981 return mInsertionPointCursorController; 1982 } 1983 1984 SelectionModifierCursorController getSelectionController() { 1985 if (!mSelectionControllerEnabled) { 1986 return null; 1987 } 1988 1989 if (mSelectionModifierCursorController == null) { 1990 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1991 1992 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1993 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1994 } 1995 1996 return mSelectionModifierCursorController; 1997 } 1998 1999 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2000 if (mCursorDrawable[cursorIndex] == null) 2001 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2002 mTextView.mCursorDrawableRes); 2003 2004 if (mTempRect == null) mTempRect = new Rect(); 2005 mCursorDrawable[cursorIndex].getPadding(mTempRect); 2006 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 2007 horizontal = Math.max(0.5f, horizontal - 0.5f); 2008 final int left = (int) (horizontal) - mTempRect.left; 2009 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 2010 bottom + mTempRect.bottom); 2011 } 2012 2013 /** 2014 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2015 * a dictionary) from the current input method, provided by it calling 2016 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2017 * implementation flashes the background of the corrected word to provide feedback to the user. 2018 * 2019 * @param info The auto correct info about the text that was corrected. 2020 */ 2021 public void onCommitCorrection(CorrectionInfo info) { 2022 if (mCorrectionHighlighter == null) { 2023 mCorrectionHighlighter = new CorrectionHighlighter(); 2024 } else { 2025 mCorrectionHighlighter.invalidate(false); 2026 } 2027 2028 mCorrectionHighlighter.highlight(info); 2029 } 2030 2031 void showSuggestions() { 2032 if (mSuggestionsPopupWindow == null) { 2033 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 2034 } 2035 hideControllers(); 2036 stopTextActionMode(); 2037 mSuggestionsPopupWindow.show(); 2038 } 2039 2040 void onScrollChanged() { 2041 if (mPositionListener != null) { 2042 mPositionListener.onScrollChanged(); 2043 } 2044 if (mTextActionMode != null) { 2045 mTextActionMode.invalidateContentRect(); 2046 } 2047 } 2048 2049 /** 2050 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2051 */ 2052 private boolean shouldBlink() { 2053 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2054 2055 final int start = mTextView.getSelectionStart(); 2056 if (start < 0) return false; 2057 2058 final int end = mTextView.getSelectionEnd(); 2059 if (end < 0) return false; 2060 2061 return start == end; 2062 } 2063 2064 void makeBlink() { 2065 if (shouldBlink()) { 2066 mShowCursor = SystemClock.uptimeMillis(); 2067 if (mBlink == null) mBlink = new Blink(); 2068 mBlink.removeCallbacks(mBlink); 2069 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 2070 } else { 2071 if (mBlink != null) mBlink.removeCallbacks(mBlink); 2072 } 2073 } 2074 2075 private class Blink extends Handler implements Runnable { 2076 private boolean mCancelled; 2077 2078 public void run() { 2079 if (mCancelled) { 2080 return; 2081 } 2082 2083 removeCallbacks(Blink.this); 2084 2085 if (shouldBlink()) { 2086 if (mTextView.getLayout() != null) { 2087 mTextView.invalidateCursorPath(); 2088 } 2089 2090 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 2091 } 2092 } 2093 2094 void cancel() { 2095 if (!mCancelled) { 2096 removeCallbacks(Blink.this); 2097 mCancelled = true; 2098 } 2099 } 2100 2101 void uncancel() { 2102 mCancelled = false; 2103 } 2104 } 2105 2106 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 2107 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2108 com.android.internal.R.layout.text_drag_thumbnail, null); 2109 2110 if (shadowView == null) { 2111 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2112 } 2113 2114 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2115 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2116 } 2117 shadowView.setText(text); 2118 shadowView.setTextColor(mTextView.getTextColors()); 2119 2120 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2121 shadowView.setGravity(Gravity.CENTER); 2122 2123 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2124 ViewGroup.LayoutParams.WRAP_CONTENT)); 2125 2126 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2127 shadowView.measure(size, size); 2128 2129 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2130 shadowView.invalidate(); 2131 return new DragShadowBuilder(shadowView); 2132 } 2133 2134 private static class DragLocalState { 2135 public TextView sourceTextView; 2136 public int start, end; 2137 2138 public DragLocalState(TextView sourceTextView, int start, int end) { 2139 this.sourceTextView = sourceTextView; 2140 this.start = start; 2141 this.end = end; 2142 } 2143 } 2144 2145 void onDrop(DragEvent event) { 2146 StringBuilder content = new StringBuilder(""); 2147 ClipData clipData = event.getClipData(); 2148 final int itemCount = clipData.getItemCount(); 2149 for (int i=0; i < itemCount; i++) { 2150 Item item = clipData.getItemAt(i); 2151 content.append(item.coerceToStyledText(mTextView.getContext())); 2152 } 2153 2154 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2155 2156 Object localState = event.getLocalState(); 2157 DragLocalState dragLocalState = null; 2158 if (localState instanceof DragLocalState) { 2159 dragLocalState = (DragLocalState) localState; 2160 } 2161 boolean dragDropIntoItself = dragLocalState != null && 2162 dragLocalState.sourceTextView == mTextView; 2163 2164 if (dragDropIntoItself) { 2165 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2166 // A drop inside the original selection discards the drop. 2167 return; 2168 } 2169 } 2170 2171 final int originalLength = mTextView.getText().length(); 2172 int min = offset; 2173 int max = offset; 2174 2175 Selection.setSelection((Spannable) mTextView.getText(), max); 2176 mTextView.replaceText_internal(min, max, content); 2177 2178 if (dragDropIntoItself) { 2179 int dragSourceStart = dragLocalState.start; 2180 int dragSourceEnd = dragLocalState.end; 2181 if (max <= dragSourceStart) { 2182 // Inserting text before selection has shifted positions 2183 final int shift = mTextView.getText().length() - originalLength; 2184 dragSourceStart += shift; 2185 dragSourceEnd += shift; 2186 } 2187 2188 // Delete original selection 2189 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2190 2191 // Make sure we do not leave two adjacent spaces. 2192 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2193 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2194 if (nextCharIdx > prevCharIdx + 1) { 2195 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2196 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2197 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2198 } 2199 } 2200 } 2201 } 2202 2203 public void addSpanWatchers(Spannable text) { 2204 final int textLength = text.length(); 2205 2206 if (mKeyListener != null) { 2207 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2208 } 2209 2210 if (mSpanController == null) { 2211 mSpanController = new SpanController(); 2212 } 2213 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2214 } 2215 2216 /** 2217 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2218 * pop-up should be displayed. 2219 * Also monitors {@link Selection} to call back to the attached input method. 2220 */ 2221 class SpanController implements SpanWatcher { 2222 2223 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2224 2225 private EasyEditPopupWindow mPopupWindow; 2226 2227 private Runnable mHidePopup; 2228 2229 // This function is pure but inner classes can't have static functions 2230 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2231 final Object span) { 2232 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2233 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2234 } 2235 2236 @Override 2237 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2238 if (isNonIntermediateSelectionSpan(text, span)) { 2239 sendUpdateSelection(); 2240 } else if (span instanceof EasyEditSpan) { 2241 if (mPopupWindow == null) { 2242 mPopupWindow = new EasyEditPopupWindow(); 2243 mHidePopup = new Runnable() { 2244 @Override 2245 public void run() { 2246 hide(); 2247 } 2248 }; 2249 } 2250 2251 // Make sure there is only at most one EasyEditSpan in the text 2252 if (mPopupWindow.mEasyEditSpan != null) { 2253 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2254 } 2255 2256 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2257 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2258 @Override 2259 public void onDeleteClick(EasyEditSpan span) { 2260 Editable editable = (Editable) mTextView.getText(); 2261 int start = editable.getSpanStart(span); 2262 int end = editable.getSpanEnd(span); 2263 if (start >= 0 && end >= 0) { 2264 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2265 mTextView.deleteText_internal(start, end); 2266 } 2267 editable.removeSpan(span); 2268 } 2269 }); 2270 2271 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2272 // The window is not visible yet, ignore the text change. 2273 return; 2274 } 2275 2276 if (mTextView.getLayout() == null) { 2277 // The view has not been laid out yet, ignore the text change 2278 return; 2279 } 2280 2281 if (extractedTextModeWillBeStarted()) { 2282 // The input is in extract mode. Do not handle the easy edit in 2283 // the original TextView, as the ExtractEditText will do 2284 return; 2285 } 2286 2287 mPopupWindow.show(); 2288 mTextView.removeCallbacks(mHidePopup); 2289 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2290 } 2291 } 2292 2293 @Override 2294 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2295 if (isNonIntermediateSelectionSpan(text, span)) { 2296 sendUpdateSelection(); 2297 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2298 hide(); 2299 } 2300 } 2301 2302 @Override 2303 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2304 int newStart, int newEnd) { 2305 if (isNonIntermediateSelectionSpan(text, span)) { 2306 sendUpdateSelection(); 2307 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2308 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2309 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2310 text.removeSpan(easyEditSpan); 2311 } 2312 } 2313 2314 public void hide() { 2315 if (mPopupWindow != null) { 2316 mPopupWindow.hide(); 2317 mTextView.removeCallbacks(mHidePopup); 2318 } 2319 } 2320 2321 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2322 try { 2323 PendingIntent pendingIntent = span.getPendingIntent(); 2324 if (pendingIntent != null) { 2325 Intent intent = new Intent(); 2326 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2327 pendingIntent.send(mTextView.getContext(), 0, intent); 2328 } 2329 } catch (CanceledException e) { 2330 // This should not happen, as we should try to send the intent only once. 2331 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2332 } 2333 } 2334 } 2335 2336 /** 2337 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2338 */ 2339 private interface EasyEditDeleteListener { 2340 2341 /** 2342 * Clicks the delete pop-up. 2343 */ 2344 void onDeleteClick(EasyEditSpan span); 2345 } 2346 2347 /** 2348 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2349 * by {@link SpanController}. 2350 */ 2351 private class EasyEditPopupWindow extends PinnedPopupWindow 2352 implements OnClickListener { 2353 private static final int POPUP_TEXT_LAYOUT = 2354 com.android.internal.R.layout.text_edit_action_popup_text; 2355 private TextView mDeleteTextView; 2356 private EasyEditSpan mEasyEditSpan; 2357 private EasyEditDeleteListener mOnDeleteListener; 2358 2359 @Override 2360 protected void createPopupWindow() { 2361 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2362 com.android.internal.R.attr.textSelectHandleWindowStyle); 2363 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2364 mPopupWindow.setClippingEnabled(true); 2365 } 2366 2367 @Override 2368 protected void initContentView() { 2369 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2370 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2371 mContentView = linearLayout; 2372 mContentView.setBackgroundResource( 2373 com.android.internal.R.drawable.text_edit_side_paste_window); 2374 2375 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2376 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2377 2378 LayoutParams wrapContent = new LayoutParams( 2379 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2380 2381 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2382 mDeleteTextView.setLayoutParams(wrapContent); 2383 mDeleteTextView.setText(com.android.internal.R.string.delete); 2384 mDeleteTextView.setOnClickListener(this); 2385 mContentView.addView(mDeleteTextView); 2386 } 2387 2388 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2389 mEasyEditSpan = easyEditSpan; 2390 } 2391 2392 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2393 mOnDeleteListener = listener; 2394 } 2395 2396 @Override 2397 public void onClick(View view) { 2398 if (view == mDeleteTextView 2399 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2400 && mOnDeleteListener != null) { 2401 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2402 } 2403 } 2404 2405 @Override 2406 public void hide() { 2407 if (mEasyEditSpan != null) { 2408 mEasyEditSpan.setDeleteEnabled(false); 2409 } 2410 mOnDeleteListener = null; 2411 super.hide(); 2412 } 2413 2414 @Override 2415 protected int getTextOffset() { 2416 // Place the pop-up at the end of the span 2417 Editable editable = (Editable) mTextView.getText(); 2418 return editable.getSpanEnd(mEasyEditSpan); 2419 } 2420 2421 @Override 2422 protected int getVerticalLocalPosition(int line) { 2423 return mTextView.getLayout().getLineBottom(line); 2424 } 2425 2426 @Override 2427 protected int clipVertically(int positionY) { 2428 // As we display the pop-up below the span, no vertical clipping is required. 2429 return positionY; 2430 } 2431 } 2432 2433 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2434 // 3 handles 2435 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2436 // 1 CursorAnchorInfoNotifier 2437 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2438 private TextViewPositionListener[] mPositionListeners = 2439 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2440 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2441 private boolean mPositionHasChanged = true; 2442 // Absolute position of the TextView with respect to its parent window 2443 private int mPositionX, mPositionY; 2444 private int mNumberOfListeners; 2445 private boolean mScrollHasChanged; 2446 final int[] mTempCoords = new int[2]; 2447 2448 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2449 if (mNumberOfListeners == 0) { 2450 updatePosition(); 2451 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2452 vto.addOnPreDrawListener(this); 2453 } 2454 2455 int emptySlotIndex = -1; 2456 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2457 TextViewPositionListener listener = mPositionListeners[i]; 2458 if (listener == positionListener) { 2459 return; 2460 } else if (emptySlotIndex < 0 && listener == null) { 2461 emptySlotIndex = i; 2462 } 2463 } 2464 2465 mPositionListeners[emptySlotIndex] = positionListener; 2466 mCanMove[emptySlotIndex] = canMove; 2467 mNumberOfListeners++; 2468 } 2469 2470 public void removeSubscriber(TextViewPositionListener positionListener) { 2471 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2472 if (mPositionListeners[i] == positionListener) { 2473 mPositionListeners[i] = null; 2474 mNumberOfListeners--; 2475 break; 2476 } 2477 } 2478 2479 if (mNumberOfListeners == 0) { 2480 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2481 vto.removeOnPreDrawListener(this); 2482 } 2483 } 2484 2485 public int getPositionX() { 2486 return mPositionX; 2487 } 2488 2489 public int getPositionY() { 2490 return mPositionY; 2491 } 2492 2493 @Override 2494 public boolean onPreDraw() { 2495 updatePosition(); 2496 2497 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2498 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2499 TextViewPositionListener positionListener = mPositionListeners[i]; 2500 if (positionListener != null) { 2501 positionListener.updatePosition(mPositionX, mPositionY, 2502 mPositionHasChanged, mScrollHasChanged); 2503 } 2504 } 2505 } 2506 2507 mScrollHasChanged = false; 2508 return true; 2509 } 2510 2511 private void updatePosition() { 2512 mTextView.getLocationInWindow(mTempCoords); 2513 2514 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2515 2516 mPositionX = mTempCoords[0]; 2517 mPositionY = mTempCoords[1]; 2518 } 2519 2520 public void onScrollChanged() { 2521 mScrollHasChanged = true; 2522 } 2523 } 2524 2525 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2526 protected PopupWindow mPopupWindow; 2527 protected ViewGroup mContentView; 2528 int mPositionX, mPositionY; 2529 2530 protected abstract void createPopupWindow(); 2531 protected abstract void initContentView(); 2532 protected abstract int getTextOffset(); 2533 protected abstract int getVerticalLocalPosition(int line); 2534 protected abstract int clipVertically(int positionY); 2535 2536 public PinnedPopupWindow() { 2537 createPopupWindow(); 2538 2539 mPopupWindow.setWindowLayoutType( 2540 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2541 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2542 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2543 2544 initContentView(); 2545 2546 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2547 ViewGroup.LayoutParams.WRAP_CONTENT); 2548 mContentView.setLayoutParams(wrapContent); 2549 2550 mPopupWindow.setContentView(mContentView); 2551 } 2552 2553 public void show() { 2554 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2555 2556 computeLocalPosition(); 2557 2558 final PositionListener positionListener = getPositionListener(); 2559 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2560 } 2561 2562 protected void measureContent() { 2563 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2564 mContentView.measure( 2565 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2566 View.MeasureSpec.AT_MOST), 2567 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2568 View.MeasureSpec.AT_MOST)); 2569 } 2570 2571 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2572 * positioned according to viewportToContentHorizontalOffset. 2573 * 2574 * This method assumes that mContentView has properly been measured from its content. */ 2575 private void computeLocalPosition() { 2576 measureContent(); 2577 final int width = mContentView.getMeasuredWidth(); 2578 final int offset = getTextOffset(); 2579 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2580 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2581 2582 final int line = mTextView.getLayout().getLineForOffset(offset); 2583 mPositionY = getVerticalLocalPosition(line); 2584 mPositionY += mTextView.viewportToContentVerticalOffset(); 2585 } 2586 2587 private void updatePosition(int parentPositionX, int parentPositionY) { 2588 int positionX = parentPositionX + mPositionX; 2589 int positionY = parentPositionY + mPositionY; 2590 2591 positionY = clipVertically(positionY); 2592 2593 // Horizontal clipping 2594 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2595 final int width = mContentView.getMeasuredWidth(); 2596 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2597 positionX = Math.max(0, positionX); 2598 2599 if (isShowing()) { 2600 mPopupWindow.update(positionX, positionY, -1, -1); 2601 } else { 2602 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2603 positionX, positionY); 2604 } 2605 } 2606 2607 public void hide() { 2608 mPopupWindow.dismiss(); 2609 getPositionListener().removeSubscriber(this); 2610 } 2611 2612 @Override 2613 public void updatePosition(int parentPositionX, int parentPositionY, 2614 boolean parentPositionChanged, boolean parentScrolled) { 2615 // Either parentPositionChanged or parentScrolled is true, check if still visible 2616 if (isShowing() && isOffsetVisible(getTextOffset())) { 2617 if (parentScrolled) computeLocalPosition(); 2618 updatePosition(parentPositionX, parentPositionY); 2619 } else { 2620 hide(); 2621 } 2622 } 2623 2624 public boolean isShowing() { 2625 return mPopupWindow.isShowing(); 2626 } 2627 } 2628 2629 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2630 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2631 private static final int ADD_TO_DICTIONARY = -1; 2632 private static final int DELETE_TEXT = -2; 2633 private SuggestionInfo[] mSuggestionInfos; 2634 private int mNumberOfSuggestions; 2635 private boolean mCursorWasVisibleBeforeSuggestions; 2636 private boolean mIsShowingUp = false; 2637 private SuggestionAdapter mSuggestionsAdapter; 2638 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2639 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2640 2641 private class CustomPopupWindow extends PopupWindow { 2642 public CustomPopupWindow(Context context, int defStyleAttr) { 2643 super(context, null, defStyleAttr); 2644 } 2645 2646 @Override 2647 public void dismiss() { 2648 super.dismiss(); 2649 2650 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2651 2652 // Safe cast since show() checks that mTextView.getText() is an Editable 2653 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2654 2655 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2656 if (hasInsertionController()) { 2657 getInsertionController().show(); 2658 } 2659 } 2660 } 2661 2662 public SuggestionsPopupWindow() { 2663 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2664 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2665 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2666 } 2667 2668 @Override 2669 protected void createPopupWindow() { 2670 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2671 com.android.internal.R.attr.textSuggestionsWindowStyle); 2672 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2673 mPopupWindow.setFocusable(true); 2674 mPopupWindow.setClippingEnabled(false); 2675 } 2676 2677 @Override 2678 protected void initContentView() { 2679 ListView listView = new ListView(mTextView.getContext()); 2680 mSuggestionsAdapter = new SuggestionAdapter(); 2681 listView.setAdapter(mSuggestionsAdapter); 2682 listView.setOnItemClickListener(this); 2683 mContentView = listView; 2684 2685 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2686 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2687 for (int i = 0; i < mSuggestionInfos.length; i++) { 2688 mSuggestionInfos[i] = new SuggestionInfo(); 2689 } 2690 } 2691 2692 public boolean isShowingUp() { 2693 return mIsShowingUp; 2694 } 2695 2696 public void onParentLostFocus() { 2697 mIsShowingUp = false; 2698 } 2699 2700 private class SuggestionInfo { 2701 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2702 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2703 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2704 SpannableStringBuilder text = new SpannableStringBuilder(); 2705 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2706 android.R.style.TextAppearance_SuggestionHighlight); 2707 } 2708 2709 private class SuggestionAdapter extends BaseAdapter { 2710 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2711 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2712 2713 @Override 2714 public int getCount() { 2715 return mNumberOfSuggestions; 2716 } 2717 2718 @Override 2719 public Object getItem(int position) { 2720 return mSuggestionInfos[position]; 2721 } 2722 2723 @Override 2724 public long getItemId(int position) { 2725 return position; 2726 } 2727 2728 @Override 2729 public View getView(int position, View convertView, ViewGroup parent) { 2730 TextView textView = (TextView) convertView; 2731 2732 if (textView == null) { 2733 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2734 parent, false); 2735 } 2736 2737 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2738 textView.setText(suggestionInfo.text); 2739 2740 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2741 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2742 textView.setBackgroundColor(Color.TRANSPARENT); 2743 } else { 2744 textView.setBackgroundColor(Color.WHITE); 2745 } 2746 2747 return textView; 2748 } 2749 } 2750 2751 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2752 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2753 final int flag1 = span1.getFlags(); 2754 final int flag2 = span2.getFlags(); 2755 if (flag1 != flag2) { 2756 // The order here should match what is used in updateDrawState 2757 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2758 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2759 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2760 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2761 if (easy1 && !misspelled1) return -1; 2762 if (easy2 && !misspelled2) return 1; 2763 if (misspelled1) return -1; 2764 if (misspelled2) return 1; 2765 } 2766 2767 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2768 } 2769 } 2770 2771 /** 2772 * Returns the suggestion spans that cover the current cursor position. The suggestion 2773 * spans are sorted according to the length of text that they are attached to. 2774 */ 2775 private SuggestionSpan[] getSuggestionSpans() { 2776 int pos = mTextView.getSelectionStart(); 2777 Spannable spannable = (Spannable) mTextView.getText(); 2778 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2779 2780 mSpansLengths.clear(); 2781 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2782 int start = spannable.getSpanStart(suggestionSpan); 2783 int end = spannable.getSpanEnd(suggestionSpan); 2784 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2785 } 2786 2787 // The suggestions are sorted according to their types (easy correction first, then 2788 // misspelled) and to the length of the text that they cover (shorter first). 2789 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2790 return suggestionSpans; 2791 } 2792 2793 @Override 2794 public void show() { 2795 if (!(mTextView.getText() instanceof Editable)) return; 2796 2797 if (updateSuggestions()) { 2798 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2799 mTextView.setCursorVisible(false); 2800 mIsShowingUp = true; 2801 super.show(); 2802 } 2803 } 2804 2805 @Override 2806 protected void measureContent() { 2807 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2808 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2809 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2810 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2811 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2812 2813 int width = 0; 2814 View view = null; 2815 for (int i = 0; i < mNumberOfSuggestions; i++) { 2816 view = mSuggestionsAdapter.getView(i, view, mContentView); 2817 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2818 view.measure(horizontalMeasure, verticalMeasure); 2819 width = Math.max(width, view.getMeasuredWidth()); 2820 } 2821 2822 // Enforce the width based on actual text widths 2823 mContentView.measure( 2824 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2825 verticalMeasure); 2826 2827 Drawable popupBackground = mPopupWindow.getBackground(); 2828 if (popupBackground != null) { 2829 if (mTempRect == null) mTempRect = new Rect(); 2830 popupBackground.getPadding(mTempRect); 2831 width += mTempRect.left + mTempRect.right; 2832 } 2833 mPopupWindow.setWidth(width); 2834 } 2835 2836 @Override 2837 protected int getTextOffset() { 2838 return mTextView.getSelectionStart(); 2839 } 2840 2841 @Override 2842 protected int getVerticalLocalPosition(int line) { 2843 return mTextView.getLayout().getLineBottom(line); 2844 } 2845 2846 @Override 2847 protected int clipVertically(int positionY) { 2848 final int height = mContentView.getMeasuredHeight(); 2849 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2850 return Math.min(positionY, displayMetrics.heightPixels - height); 2851 } 2852 2853 @Override 2854 public void hide() { 2855 super.hide(); 2856 } 2857 2858 private boolean updateSuggestions() { 2859 Spannable spannable = (Spannable) mTextView.getText(); 2860 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2861 2862 final int nbSpans = suggestionSpans.length; 2863 // Suggestions are shown after a delay: the underlying spans may have been removed 2864 if (nbSpans == 0) return false; 2865 2866 mNumberOfSuggestions = 0; 2867 int spanUnionStart = mTextView.getText().length(); 2868 int spanUnionEnd = 0; 2869 2870 SuggestionSpan misspelledSpan = null; 2871 int underlineColor = 0; 2872 2873 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2874 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2875 final int spanStart = spannable.getSpanStart(suggestionSpan); 2876 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2877 spanUnionStart = Math.min(spanStart, spanUnionStart); 2878 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2879 2880 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2881 misspelledSpan = suggestionSpan; 2882 } 2883 2884 // The first span dictates the background color of the highlighted text 2885 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2886 2887 String[] suggestions = suggestionSpan.getSuggestions(); 2888 int nbSuggestions = suggestions.length; 2889 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2890 String suggestion = suggestions[suggestionIndex]; 2891 2892 boolean suggestionIsDuplicate = false; 2893 for (int i = 0; i < mNumberOfSuggestions; i++) { 2894 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2895 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2896 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2897 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2898 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2899 suggestionIsDuplicate = true; 2900 break; 2901 } 2902 } 2903 } 2904 2905 if (!suggestionIsDuplicate) { 2906 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2907 suggestionInfo.suggestionSpan = suggestionSpan; 2908 suggestionInfo.suggestionIndex = suggestionIndex; 2909 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2910 2911 mNumberOfSuggestions++; 2912 2913 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2914 // Also end outer for loop 2915 spanIndex = nbSpans; 2916 break; 2917 } 2918 } 2919 } 2920 } 2921 2922 for (int i = 0; i < mNumberOfSuggestions; i++) { 2923 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2924 } 2925 2926 // Add "Add to dictionary" item if there is a span with the misspelled flag 2927 if (misspelledSpan != null) { 2928 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2929 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2930 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2931 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2932 suggestionInfo.suggestionSpan = misspelledSpan; 2933 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2934 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2935 getContext().getString(com.android.internal.R.string.addToDictionary)); 2936 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2937 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2938 2939 mNumberOfSuggestions++; 2940 } 2941 } 2942 2943 // Delete item 2944 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2945 suggestionInfo.suggestionSpan = null; 2946 suggestionInfo.suggestionIndex = DELETE_TEXT; 2947 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2948 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2949 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2950 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2951 mNumberOfSuggestions++; 2952 2953 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2954 if (underlineColor == 0) { 2955 // Fallback on the default highlight color when the first span does not provide one 2956 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2957 } else { 2958 final float BACKGROUND_TRANSPARENCY = 0.4f; 2959 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2960 mSuggestionRangeSpan.setBackgroundColor( 2961 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2962 } 2963 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2964 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2965 2966 mSuggestionsAdapter.notifyDataSetChanged(); 2967 return true; 2968 } 2969 2970 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2971 int unionEnd) { 2972 final Spannable text = (Spannable) mTextView.getText(); 2973 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2974 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2975 2976 // Adjust the start/end of the suggestion span 2977 suggestionInfo.suggestionStart = spanStart - unionStart; 2978 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2979 + suggestionInfo.text.length(); 2980 2981 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2982 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2983 2984 // Add the text before and after the span. 2985 final String textAsString = text.toString(); 2986 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2987 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2988 } 2989 2990 @Override 2991 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2992 Editable editable = (Editable) mTextView.getText(); 2993 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2994 2995 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2996 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2997 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2998 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2999 // Do not leave two adjacent spaces after deletion, or one at beginning of text 3000 if (spanUnionEnd < editable.length() && 3001 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 3002 (spanUnionStart == 0 || 3003 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 3004 spanUnionEnd = spanUnionEnd + 1; 3005 } 3006 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3007 } 3008 hide(); 3009 return; 3010 } 3011 3012 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 3013 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 3014 if (spanStart < 0 || spanEnd <= spanStart) { 3015 // Span has been removed 3016 hide(); 3017 return; 3018 } 3019 3020 final String originalText = editable.toString().substring(spanStart, spanEnd); 3021 3022 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 3023 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3024 intent.putExtra("word", originalText); 3025 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 3026 // Put a listener to replace the original text with a word which the user 3027 // modified in a user dictionary dialog. 3028 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3029 mTextView.getContext().startActivity(intent); 3030 // There is no way to know if the word was indeed added. Re-check. 3031 // TODO The ExtractEditText should remove the span in the original text instead 3032 editable.removeSpan(suggestionInfo.suggestionSpan); 3033 Selection.setSelection(editable, spanEnd); 3034 updateSpellCheckSpans(spanStart, spanEnd, false); 3035 } else { 3036 // SuggestionSpans are removed by replace: save them before 3037 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 3038 SuggestionSpan.class); 3039 final int length = suggestionSpans.length; 3040 int[] suggestionSpansStarts = new int[length]; 3041 int[] suggestionSpansEnds = new int[length]; 3042 int[] suggestionSpansFlags = new int[length]; 3043 for (int i = 0; i < length; i++) { 3044 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 3045 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 3046 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 3047 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 3048 3049 // Remove potential misspelled flags 3050 int suggestionSpanFlags = suggestionSpan.getFlags(); 3051 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 3052 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 3053 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 3054 suggestionSpan.setFlags(suggestionSpanFlags); 3055 } 3056 } 3057 3058 final int suggestionStart = suggestionInfo.suggestionStart; 3059 final int suggestionEnd = suggestionInfo.suggestionEnd; 3060 final String suggestion = suggestionInfo.text.subSequence( 3061 suggestionStart, suggestionEnd).toString(); 3062 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 3063 3064 // Notify source IME of the suggestion pick. Do this before 3065 // swaping texts. 3066 suggestionInfo.suggestionSpan.notifySelection( 3067 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 3068 3069 // Swap text content between actual text and Suggestion span 3070 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 3071 suggestions[suggestionInfo.suggestionIndex] = originalText; 3072 3073 // Restore previous SuggestionSpans 3074 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 3075 for (int i = 0; i < length; i++) { 3076 // Only spans that include the modified region make sense after replacement 3077 // Spans partially included in the replaced region are removed, there is no 3078 // way to assign them a valid range after replacement 3079 if (suggestionSpansStarts[i] <= spanStart && 3080 suggestionSpansEnds[i] >= spanEnd) { 3081 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 3082 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 3083 } 3084 } 3085 3086 // Move cursor at the end of the replaced word 3087 final int newCursorPosition = spanEnd + lengthDifference; 3088 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 3089 } 3090 3091 hide(); 3092 } 3093 } 3094 3095 /** 3096 * An ActionMode Callback class that is used to provide actions while in text insertion or 3097 * selection mode. 3098 * 3099 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3100 * actions, depending on which of these this TextView supports and the current selection. 3101 */ 3102 private class TextActionModeCallback extends ActionMode.Callback2 { 3103 private final Path mSelectionPath = new Path(); 3104 private final RectF mSelectionBounds = new RectF(); 3105 private final boolean mHasSelection; 3106 3107 private int mHandleHeight; 3108 3109 public TextActionModeCallback(boolean hasSelection) { 3110 mHasSelection = hasSelection; 3111 if (mHasSelection) { 3112 SelectionModifierCursorController selectionController = getSelectionController(); 3113 if (selectionController.mStartHandle == null) { 3114 // As these are for initializing selectionController, hide() must be called. 3115 selectionController.initDrawables(); 3116 selectionController.initHandles(); 3117 selectionController.hide(); 3118 } 3119 mHandleHeight = Math.max( 3120 mSelectHandleLeft.getMinimumHeight(), 3121 mSelectHandleRight.getMinimumHeight()); 3122 } else { 3123 InsertionPointCursorController insertionController = getInsertionController(); 3124 if (insertionController != null) { 3125 insertionController.getHandle(); 3126 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3127 } 3128 } 3129 } 3130 3131 @Override 3132 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3133 mode.setTitle(null); 3134 mode.setSubtitle(null); 3135 mode.setTitleOptionalHint(true); 3136 populateMenuWithItems(menu); 3137 3138 Callback customCallback = getCustomCallback(); 3139 if (customCallback != null) { 3140 if (!customCallback.onCreateActionMode(mode, menu)) { 3141 // The custom mode can choose to cancel the action mode 3142 return false; 3143 } 3144 } 3145 3146 addIntentMenuItemsForTextProcessing(menu); 3147 3148 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3149 mTextView.setHasTransientState(true); 3150 return true; 3151 } else { 3152 return false; 3153 } 3154 } 3155 3156 private Callback getCustomCallback() { 3157 return mHasSelection 3158 ? mCustomSelectionActionModeCallback 3159 : mCustomInsertionActionModeCallback; 3160 } 3161 3162 private void populateMenuWithItems(Menu menu) { 3163 if (mTextView.canCut()) { 3164 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3165 com.android.internal.R.string.cut). 3166 setAlphabeticShortcut('x'). 3167 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3168 } 3169 3170 if (mTextView.canCopy()) { 3171 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3172 com.android.internal.R.string.copy). 3173 setAlphabeticShortcut('c'). 3174 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3175 } 3176 3177 if (mTextView.canPaste()) { 3178 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3179 com.android.internal.R.string.paste). 3180 setAlphabeticShortcut('v'). 3181 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3182 } 3183 3184 if (mTextView.canShare()) { 3185 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3186 com.android.internal.R.string.share). 3187 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3188 } 3189 3190 updateSelectAllItem(menu); 3191 updateReplaceItem(menu); 3192 } 3193 3194 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3195 if (mTextView.canProcessText()) { 3196 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3197 List<ResolveInfo> supportedActivities = 3198 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3199 for (int i = 0; i < supportedActivities.size(); ++i) { 3200 ResolveInfo info = supportedActivities.get(i); 3201 menu.add(Menu.NONE, Menu.NONE, 3202 MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i, 3203 info.loadLabel(packageManager)) 3204 .setIntent(createProcessTextIntentForResolveInfo(info)) 3205 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3206 } 3207 } 3208 } 3209 3210 private Intent createProcessTextIntent() { 3211 return new Intent() 3212 .setAction(Intent.ACTION_PROCESS_TEXT) 3213 .setType("text/plain"); 3214 } 3215 3216 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3217 return createProcessTextIntent() 3218 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3219 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3220 } 3221 3222 @Override 3223 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3224 updateSelectAllItem(menu); 3225 updateReplaceItem(menu); 3226 3227 Callback customCallback = getCustomCallback(); 3228 if (customCallback != null) { 3229 return customCallback.onPrepareActionMode(mode, menu); 3230 } 3231 return true; 3232 } 3233 3234 private void updateSelectAllItem(Menu menu) { 3235 boolean canSelectAll = mTextView.canSelectAllText(); 3236 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3237 if (canSelectAll && !selectAllItemExists) { 3238 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3239 com.android.internal.R.string.selectAll) 3240 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3241 } else if (!canSelectAll && selectAllItemExists) { 3242 menu.removeItem(TextView.ID_SELECT_ALL); 3243 } 3244 } 3245 3246 private void updateReplaceItem(Menu menu) { 3247 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3248 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3249 if (canReplace && !replaceItemExists) { 3250 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3251 com.android.internal.R.string.replace) 3252 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3253 } else if (!canReplace && replaceItemExists) { 3254 menu.removeItem(TextView.ID_REPLACE); 3255 } 3256 } 3257 3258 @Override 3259 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3260 if (item.getIntent() != null 3261 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3262 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3263 mPreserveDetachedSelection = true; 3264 mTextView.startActivityForResult( 3265 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3266 return true; 3267 } 3268 Callback customCallback = getCustomCallback(); 3269 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3270 return true; 3271 } 3272 return mTextView.onTextContextMenuItem(item.getItemId()); 3273 } 3274 3275 @Override 3276 public void onDestroyActionMode(ActionMode mode) { 3277 Callback customCallback = getCustomCallback(); 3278 if (customCallback != null) { 3279 customCallback.onDestroyActionMode(mode); 3280 } 3281 3282 /* 3283 * If we're ending this mode because we're detaching from a window, 3284 * we still have selection state to preserve. Don't clear it, we'll 3285 * bring back the selection mode when (if) we get reattached. 3286 */ 3287 if (!mPreserveDetachedSelection) { 3288 Selection.setSelection((Spannable) mTextView.getText(), 3289 mTextView.getSelectionEnd()); 3290 mTextView.setHasTransientState(false); 3291 } 3292 3293 if (mSelectionModifierCursorController != null) { 3294 mSelectionModifierCursorController.hide(); 3295 mSelectionModifierCursorController.resetTouchOffsets(); 3296 } 3297 3298 mTextActionMode = null; 3299 } 3300 3301 @Override 3302 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3303 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3304 super.onGetContentRect(mode, view, outRect); 3305 return; 3306 } 3307 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3308 // We have a selection. 3309 mSelectionPath.reset(); 3310 mTextView.getLayout().getSelectionPath( 3311 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3312 mSelectionPath.computeBounds(mSelectionBounds, true); 3313 mSelectionBounds.bottom += mHandleHeight; 3314 } else if (mCursorCount == 2) { 3315 // We have a split cursor. In this case, we take the rectangle that includes both 3316 // parts of the cursor to ensure we don't obscure either of them. 3317 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3318 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3319 mSelectionBounds.set( 3320 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3321 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3322 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3323 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3324 + mHandleHeight); 3325 } else { 3326 // We have a single cursor. 3327 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3328 float primaryHorizontal = 3329 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3330 mSelectionBounds.set( 3331 primaryHorizontal, 3332 mTextView.getLayout().getLineTop(line), 3333 primaryHorizontal + 1, 3334 mTextView.getLayout().getLineTop(line + 1) + mHandleHeight); 3335 } 3336 // Take TextView's padding and scroll into account. 3337 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3338 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3339 outRect.set( 3340 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3341 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3342 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3343 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3344 } 3345 } 3346 3347 /** 3348 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3349 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3350 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3351 */ 3352 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3353 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3354 final int[] mTmpIntOffset = new int[2]; 3355 final Matrix mViewToScreenMatrix = new Matrix(); 3356 3357 @Override 3358 public void updatePosition(int parentPositionX, int parentPositionY, 3359 boolean parentPositionChanged, boolean parentScrolled) { 3360 final InputMethodState ims = mInputMethodState; 3361 if (ims == null || ims.mBatchEditNesting > 0) { 3362 return; 3363 } 3364 final InputMethodManager imm = InputMethodManager.peekInstance(); 3365 if (null == imm) { 3366 return; 3367 } 3368 if (!imm.isActive(mTextView)) { 3369 return; 3370 } 3371 // Skip if the IME has not requested the cursor/anchor position. 3372 if (!imm.isCursorAnchorInfoEnabled()) { 3373 return; 3374 } 3375 Layout layout = mTextView.getLayout(); 3376 if (layout == null) { 3377 return; 3378 } 3379 3380 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3381 builder.reset(); 3382 3383 final int selectionStart = mTextView.getSelectionStart(); 3384 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3385 3386 // Construct transformation matrix from view local coordinates to screen coordinates. 3387 mViewToScreenMatrix.set(mTextView.getMatrix()); 3388 mTextView.getLocationOnScreen(mTmpIntOffset); 3389 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3390 builder.setMatrix(mViewToScreenMatrix); 3391 3392 final float viewportToContentHorizontalOffset = 3393 mTextView.viewportToContentHorizontalOffset(); 3394 final float viewportToContentVerticalOffset = 3395 mTextView.viewportToContentVerticalOffset(); 3396 3397 final CharSequence text = mTextView.getText(); 3398 if (text instanceof Spannable) { 3399 final Spannable sp = (Spannable) text; 3400 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3401 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3402 if (composingTextEnd < composingTextStart) { 3403 final int temp = composingTextEnd; 3404 composingTextEnd = composingTextStart; 3405 composingTextStart = temp; 3406 } 3407 final boolean hasComposingText = 3408 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3409 if (hasComposingText) { 3410 final CharSequence composingText = text.subSequence(composingTextStart, 3411 composingTextEnd); 3412 builder.setComposingText(composingTextStart, composingText); 3413 3414 final int minLine = layout.getLineForOffset(composingTextStart); 3415 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3416 for (int line = minLine; line <= maxLine; ++line) { 3417 final int lineStart = layout.getLineStart(line); 3418 final int lineEnd = layout.getLineEnd(line); 3419 final int offsetStart = Math.max(lineStart, composingTextStart); 3420 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3421 final boolean ltrLine = 3422 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3423 final float[] widths = new float[offsetEnd - offsetStart]; 3424 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3425 final float top = layout.getLineTop(line); 3426 final float bottom = layout.getLineBottom(line); 3427 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3428 final float charWidth = widths[offset - offsetStart]; 3429 final boolean isRtl = layout.isRtlCharAt(offset); 3430 final float primary = layout.getPrimaryHorizontal(offset); 3431 final float secondary = layout.getSecondaryHorizontal(offset); 3432 // TODO: This doesn't work perfectly for text with custom styles and 3433 // TAB chars. 3434 final float left; 3435 final float right; 3436 if (ltrLine) { 3437 if (isRtl) { 3438 left = secondary - charWidth; 3439 right = secondary; 3440 } else { 3441 left = primary; 3442 right = primary + charWidth; 3443 } 3444 } else { 3445 if (!isRtl) { 3446 left = secondary; 3447 right = secondary + charWidth; 3448 } else { 3449 left = primary - charWidth; 3450 right = primary; 3451 } 3452 } 3453 // TODO: Check top-right and bottom-left as well. 3454 final float localLeft = left + viewportToContentHorizontalOffset; 3455 final float localRight = right + viewportToContentHorizontalOffset; 3456 final float localTop = top + viewportToContentVerticalOffset; 3457 final float localBottom = bottom + viewportToContentVerticalOffset; 3458 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3459 final boolean isBottomRightVisible = 3460 isPositionVisible(localRight, localBottom); 3461 int characterBoundsFlags = 0; 3462 if (isTopLeftVisible || isBottomRightVisible) { 3463 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3464 } 3465 if (!isTopLeftVisible || !isBottomRightVisible) { 3466 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3467 } 3468 if (isRtl) { 3469 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3470 } 3471 // Here offset is the index in Java chars. 3472 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3473 localBottom, characterBoundsFlags); 3474 } 3475 } 3476 } 3477 } 3478 3479 // Treat selectionStart as the insertion point. 3480 if (0 <= selectionStart) { 3481 final int offset = selectionStart; 3482 final int line = layout.getLineForOffset(offset); 3483 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3484 + viewportToContentHorizontalOffset; 3485 final float insertionMarkerTop = layout.getLineTop(line) 3486 + viewportToContentVerticalOffset; 3487 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3488 + viewportToContentVerticalOffset; 3489 final float insertionMarkerBottom = layout.getLineBottom(line) 3490 + viewportToContentVerticalOffset; 3491 final boolean isTopVisible = 3492 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3493 final boolean isBottomVisible = 3494 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3495 int insertionMarkerFlags = 0; 3496 if (isTopVisible || isBottomVisible) { 3497 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3498 } 3499 if (!isTopVisible || !isBottomVisible) { 3500 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3501 } 3502 if (layout.isRtlCharAt(offset)) { 3503 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3504 } 3505 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3506 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3507 } 3508 3509 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3510 } 3511 } 3512 3513 private abstract class HandleView extends View implements TextViewPositionListener { 3514 protected Drawable mDrawable; 3515 protected Drawable mDrawableLtr; 3516 protected Drawable mDrawableRtl; 3517 private final PopupWindow mContainer; 3518 // Position with respect to the parent TextView 3519 private int mPositionX, mPositionY; 3520 private boolean mIsDragging; 3521 // Offset from touch position to mPosition 3522 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3523 protected int mHotspotX; 3524 protected int mHorizontalGravity; 3525 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3526 private float mTouchOffsetY; 3527 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3528 private float mIdealVerticalOffset; 3529 // Parent's (TextView) previous position in window 3530 private int mLastParentX, mLastParentY; 3531 // Previous text character offset 3532 protected int mPreviousOffset = -1; 3533 // Previous text character offset 3534 private boolean mPositionHasChanged = true; 3535 // Minimum touch target size for handles 3536 private int mMinSize; 3537 // Indicates the line of text that the handle is on. 3538 protected int mPrevLine = -1; 3539 3540 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3541 super(mTextView.getContext()); 3542 mContainer = new PopupWindow(mTextView.getContext(), null, 3543 com.android.internal.R.attr.textSelectHandleWindowStyle); 3544 mContainer.setSplitTouchEnabled(true); 3545 mContainer.setClippingEnabled(false); 3546 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3547 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3548 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3549 mContainer.setContentView(this); 3550 3551 mDrawableLtr = drawableLtr; 3552 mDrawableRtl = drawableRtl; 3553 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3554 com.android.internal.R.dimen.text_handle_min_size); 3555 3556 updateDrawable(); 3557 3558 final int handleHeight = getPreferredHeight(); 3559 mTouchOffsetY = -0.3f * handleHeight; 3560 mIdealVerticalOffset = 0.7f * handleHeight; 3561 } 3562 3563 public float getIdealVerticalOffset() { 3564 return mIdealVerticalOffset; 3565 } 3566 3567 protected void updateDrawable() { 3568 final int offset = getCurrentCursorOffset(); 3569 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3570 final Drawable oldDrawable = mDrawable; 3571 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3572 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3573 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3574 if (oldDrawable != mDrawable) { 3575 postInvalidate(); 3576 } 3577 } 3578 3579 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3580 protected abstract int getHorizontalGravity(boolean isRtlRun); 3581 3582 // Touch-up filter: number of previous positions remembered 3583 private static final int HISTORY_SIZE = 5; 3584 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3585 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3586 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3587 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3588 private int mPreviousOffsetIndex = 0; 3589 private int mNumberPreviousOffsets = 0; 3590 3591 private void startTouchUpFilter(int offset) { 3592 mNumberPreviousOffsets = 0; 3593 addPositionToTouchUpFilter(offset); 3594 } 3595 3596 private void addPositionToTouchUpFilter(int offset) { 3597 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3598 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3599 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3600 mNumberPreviousOffsets++; 3601 } 3602 3603 private void filterOnTouchUp() { 3604 final long now = SystemClock.uptimeMillis(); 3605 int i = 0; 3606 int index = mPreviousOffsetIndex; 3607 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3608 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3609 i++; 3610 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3611 } 3612 3613 if (i > 0 && i < iMax && 3614 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3615 positionAtCursorOffset(mPreviousOffsets[index], false); 3616 } 3617 } 3618 3619 public boolean offsetHasBeenChanged() { 3620 return mNumberPreviousOffsets > 1; 3621 } 3622 3623 @Override 3624 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3625 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3626 } 3627 3628 private int getPreferredWidth() { 3629 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3630 } 3631 3632 private int getPreferredHeight() { 3633 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3634 } 3635 3636 public void show() { 3637 if (isShowing()) return; 3638 3639 getPositionListener().addSubscriber(this, true /* local position may change */); 3640 3641 // Make sure the offset is always considered new, even when focusing at same position 3642 mPreviousOffset = -1; 3643 positionAtCursorOffset(getCurrentCursorOffset(), false); 3644 } 3645 3646 protected void dismiss() { 3647 mIsDragging = false; 3648 mContainer.dismiss(); 3649 onDetached(); 3650 } 3651 3652 public void hide() { 3653 dismiss(); 3654 3655 getPositionListener().removeSubscriber(this); 3656 } 3657 3658 public boolean isShowing() { 3659 return mContainer.isShowing(); 3660 } 3661 3662 private boolean isVisible() { 3663 // Always show a dragging handle. 3664 if (mIsDragging) { 3665 return true; 3666 } 3667 3668 if (mTextView.isInBatchEditMode()) { 3669 return false; 3670 } 3671 3672 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3673 } 3674 3675 public abstract int getCurrentCursorOffset(); 3676 3677 protected abstract void updateSelection(int offset); 3678 3679 public abstract void updatePosition(float x, float y); 3680 3681 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3682 // A HandleView relies on the layout, which may be nulled by external methods 3683 Layout layout = mTextView.getLayout(); 3684 if (layout == null) { 3685 // Will update controllers' state, hiding them and stopping selection mode if needed 3686 prepareCursorControllers(); 3687 return; 3688 } 3689 3690 boolean offsetChanged = offset != mPreviousOffset; 3691 if (offsetChanged || parentScrolled) { 3692 if (offsetChanged) { 3693 updateSelection(offset); 3694 addPositionToTouchUpFilter(offset); 3695 } 3696 final int line = layout.getLineForOffset(offset); 3697 mPrevLine = line; 3698 3699 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3700 getHorizontalOffset() + getCursorOffset()); 3701 mPositionY = layout.getLineBottom(line); 3702 3703 // Take TextView's padding and scroll into account. 3704 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3705 mPositionY += mTextView.viewportToContentVerticalOffset(); 3706 3707 mPreviousOffset = offset; 3708 mPositionHasChanged = true; 3709 } 3710 } 3711 3712 public void updatePosition(int parentPositionX, int parentPositionY, 3713 boolean parentPositionChanged, boolean parentScrolled) { 3714 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3715 if (parentPositionChanged || mPositionHasChanged) { 3716 if (mIsDragging) { 3717 // Update touchToWindow offset in case of parent scrolling while dragging 3718 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3719 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3720 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3721 mLastParentX = parentPositionX; 3722 mLastParentY = parentPositionY; 3723 } 3724 3725 onHandleMoved(); 3726 } 3727 3728 if (isVisible()) { 3729 final int positionX = parentPositionX + mPositionX; 3730 final int positionY = parentPositionY + mPositionY; 3731 if (isShowing()) { 3732 mContainer.update(positionX, positionY, -1, -1); 3733 } else { 3734 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3735 positionX, positionY); 3736 } 3737 } else { 3738 if (isShowing()) { 3739 dismiss(); 3740 } 3741 } 3742 3743 mPositionHasChanged = false; 3744 } 3745 } 3746 3747 public void showAtLocation(int offset) { 3748 // TODO - investigate if there's a better way to show the handles 3749 // after the drag accelerator has occured. 3750 int[] tmpCords = new int[2]; 3751 mTextView.getLocationInWindow(tmpCords); 3752 3753 Layout layout = mTextView.getLayout(); 3754 int posX = tmpCords[0]; 3755 int posY = tmpCords[1]; 3756 3757 final int line = layout.getLineForOffset(offset); 3758 3759 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3760 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3761 int startY = layout.getLineBottom(line); 3762 3763 // Take TextView's padding and scroll into account. 3764 startX += mTextView.viewportToContentHorizontalOffset(); 3765 startY += mTextView.viewportToContentVerticalOffset(); 3766 3767 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3768 startX + posX, startY + posY); 3769 } 3770 3771 @Override 3772 protected void onDraw(Canvas c) { 3773 final int drawWidth = mDrawable.getIntrinsicWidth(); 3774 final int left = getHorizontalOffset(); 3775 3776 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3777 mDrawable.draw(c); 3778 } 3779 3780 private int getHorizontalOffset() { 3781 final int width = getPreferredWidth(); 3782 final int drawWidth = mDrawable.getIntrinsicWidth(); 3783 final int left; 3784 switch (mHorizontalGravity) { 3785 case Gravity.LEFT: 3786 left = 0; 3787 break; 3788 default: 3789 case Gravity.CENTER: 3790 left = (width - drawWidth) / 2; 3791 break; 3792 case Gravity.RIGHT: 3793 left = width - drawWidth; 3794 break; 3795 } 3796 return left; 3797 } 3798 3799 protected int getCursorOffset() { 3800 return 0; 3801 } 3802 3803 @Override 3804 public boolean onTouchEvent(MotionEvent ev) { 3805 updateFloatingToolbarVisibility(ev); 3806 3807 switch (ev.getActionMasked()) { 3808 case MotionEvent.ACTION_DOWN: { 3809 startTouchUpFilter(getCurrentCursorOffset()); 3810 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3811 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3812 3813 final PositionListener positionListener = getPositionListener(); 3814 mLastParentX = positionListener.getPositionX(); 3815 mLastParentY = positionListener.getPositionY(); 3816 mIsDragging = true; 3817 break; 3818 } 3819 3820 case MotionEvent.ACTION_MOVE: { 3821 final float rawX = ev.getRawX(); 3822 final float rawY = ev.getRawY(); 3823 3824 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3825 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3826 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3827 float newVerticalOffset; 3828 if (previousVerticalOffset < mIdealVerticalOffset) { 3829 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3830 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3831 } else { 3832 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3833 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3834 } 3835 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3836 3837 final float newPosX = 3838 rawX - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 3839 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3840 3841 updatePosition(newPosX, newPosY); 3842 break; 3843 } 3844 3845 case MotionEvent.ACTION_UP: 3846 filterOnTouchUp(); 3847 mIsDragging = false; 3848 break; 3849 3850 case MotionEvent.ACTION_CANCEL: 3851 mIsDragging = false; 3852 break; 3853 } 3854 return true; 3855 } 3856 3857 public boolean isDragging() { 3858 return mIsDragging; 3859 } 3860 3861 void onHandleMoved() {} 3862 3863 public void onDetached() {} 3864 } 3865 3866 private class InsertionHandleView extends HandleView { 3867 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3868 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3869 3870 // Used to detect taps on the insertion handle, which will affect the selection action mode 3871 private float mDownPositionX, mDownPositionY; 3872 private Runnable mHider; 3873 3874 public InsertionHandleView(Drawable drawable) { 3875 super(drawable, drawable); 3876 } 3877 3878 @Override 3879 public void show() { 3880 super.show(); 3881 3882 final long durationSinceCutOrCopy = 3883 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 3884 3885 // Cancel the single tap delayed runnable. 3886 if (mInsertionActionModeRunnable != null 3887 && (mDoubleTap || isCursorInsideEasyCorrectionSpan())) { 3888 mTextView.removeCallbacks(mInsertionActionModeRunnable); 3889 } 3890 3891 // Prepare and schedule the single tap runnable to run exactly after the double tap 3892 // timeout has passed. 3893 if (!mDoubleTap && !isCursorInsideEasyCorrectionSpan() 3894 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 3895 if (mInsertionActionModeRunnable == null) { 3896 mInsertionActionModeRunnable = new Runnable() { 3897 public void run() { 3898 startInsertionActionMode(); 3899 } 3900 }; 3901 } 3902 3903 mTextView.postDelayed( 3904 mInsertionActionModeRunnable, 3905 ViewConfiguration.getDoubleTapTimeout() + 1); 3906 } 3907 3908 hideAfterDelay(); 3909 } 3910 3911 private void hideAfterDelay() { 3912 if (mHider == null) { 3913 mHider = new Runnable() { 3914 public void run() { 3915 hide(); 3916 } 3917 }; 3918 } else { 3919 removeHiderCallback(); 3920 } 3921 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3922 } 3923 3924 private void removeHiderCallback() { 3925 if (mHider != null) { 3926 mTextView.removeCallbacks(mHider); 3927 } 3928 } 3929 3930 @Override 3931 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3932 return drawable.getIntrinsicWidth() / 2; 3933 } 3934 3935 @Override 3936 protected int getHorizontalGravity(boolean isRtlRun) { 3937 return Gravity.CENTER_HORIZONTAL; 3938 } 3939 3940 @Override 3941 protected int getCursorOffset() { 3942 int offset = super.getCursorOffset(); 3943 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3944 if (cursor != null) { 3945 cursor.getPadding(mTempRect); 3946 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3947 } 3948 return offset; 3949 } 3950 3951 @Override 3952 public boolean onTouchEvent(MotionEvent ev) { 3953 final boolean result = super.onTouchEvent(ev); 3954 3955 switch (ev.getActionMasked()) { 3956 case MotionEvent.ACTION_DOWN: 3957 mDownPositionX = ev.getRawX(); 3958 mDownPositionY = ev.getRawY(); 3959 break; 3960 3961 case MotionEvent.ACTION_UP: 3962 if (!offsetHasBeenChanged()) { 3963 final float deltaX = mDownPositionX - ev.getRawX(); 3964 final float deltaY = mDownPositionY - ev.getRawY(); 3965 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3966 3967 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3968 mTextView.getContext()); 3969 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3970 3971 if (distanceSquared < touchSlop * touchSlop) { 3972 // Tapping on the handle toggles the selection action mode. 3973 if (mTextActionMode != null) { 3974 mTextActionMode.finish(); 3975 } else { 3976 startInsertionActionMode(); 3977 } 3978 } 3979 } else { 3980 if (mTextActionMode != null) { 3981 mTextActionMode.invalidateContentRect(); 3982 } 3983 } 3984 hideAfterDelay(); 3985 break; 3986 3987 case MotionEvent.ACTION_CANCEL: 3988 hideAfterDelay(); 3989 break; 3990 3991 default: 3992 break; 3993 } 3994 3995 return result; 3996 } 3997 3998 @Override 3999 public int getCurrentCursorOffset() { 4000 return mTextView.getSelectionStart(); 4001 } 4002 4003 @Override 4004 public void updateSelection(int offset) { 4005 Selection.setSelection((Spannable) mTextView.getText(), offset); 4006 } 4007 4008 @Override 4009 public void updatePosition(float x, float y) { 4010 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 4011 if (mTextActionMode != null) { 4012 mTextActionMode.invalidate(); 4013 } 4014 } 4015 4016 @Override 4017 void onHandleMoved() { 4018 super.onHandleMoved(); 4019 removeHiderCallback(); 4020 } 4021 4022 @Override 4023 public void onDetached() { 4024 super.onDetached(); 4025 removeHiderCallback(); 4026 } 4027 } 4028 4029 private class SelectionStartHandleView extends HandleView { 4030 // Indicates whether the cursor is making adjustments within a word. 4031 private boolean mInWord = false; 4032 // Difference between touch position and word boundary position. 4033 private float mTouchWordDelta; 4034 4035 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4036 super(drawableLtr, drawableRtl); 4037 } 4038 4039 @Override 4040 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4041 if (isRtlRun) { 4042 return drawable.getIntrinsicWidth() / 4; 4043 } else { 4044 return (drawable.getIntrinsicWidth() * 3) / 4; 4045 } 4046 } 4047 4048 @Override 4049 protected int getHorizontalGravity(boolean isRtlRun) { 4050 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 4051 } 4052 4053 @Override 4054 public int getCurrentCursorOffset() { 4055 return mTextView.getSelectionStart(); 4056 } 4057 4058 @Override 4059 public void updateSelection(int offset) { 4060 Selection.setSelection((Spannable) mTextView.getText(), offset, 4061 mTextView.getSelectionEnd()); 4062 updateDrawable(); 4063 if (mTextActionMode != null) { 4064 mTextActionMode.invalidate(); 4065 } 4066 } 4067 4068 @Override 4069 public void updatePosition(float x, float y) { 4070 final int selectionEnd = mTextView.getSelectionEnd(); 4071 final Layout layout = mTextView.getLayout(); 4072 int initialOffset = mTextView.getOffsetForPosition(x, y); 4073 int currLine = mTextView.getLineAtCoordinate(y); 4074 boolean positionCursor = false; 4075 4076 if (initialOffset >= selectionEnd) { 4077 // Handles have crossed, bound it to the last selected line and 4078 // adjust by word / char as normal. 4079 currLine = layout != null ? layout.getLineForOffset(selectionEnd) : mPrevLine; 4080 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4081 } 4082 4083 int offset = initialOffset; 4084 int end = getWordEnd(offset); 4085 int start = getWordStart(offset); 4086 4087 if (offset < mPreviousOffset) { 4088 // User is increasing the selection. 4089 if (!mInWord || currLine < mPrevLine) { 4090 // We're not in a word, or we're on a different line so we'll expand by 4091 // word. First ensure the user has at least entered the next word. 4092 int offsetToWord = Math.min((end - start) / 2, 2); 4093 if (offset <= end - offsetToWord || currLine < mPrevLine) { 4094 offset = start; 4095 } else { 4096 offset = mPreviousOffset; 4097 } 4098 } 4099 if (layout != null && offset < initialOffset) { 4100 final float adjustedX = layout.getPrimaryHorizontal(offset); 4101 mTouchWordDelta = 4102 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4103 } else { 4104 mTouchWordDelta = 0.0f; 4105 } 4106 positionCursor = true; 4107 } else { 4108 final int adjustedOffset = 4109 mTextView.getOffsetAtCoordinate(currLine, x - mTouchWordDelta); 4110 if (adjustedOffset > mPreviousOffset || currLine > mPrevLine) { 4111 // User is shrinking the selection. 4112 if (currLine > mPrevLine) { 4113 // We're on a different line, so we'll snap to word boundaries. 4114 offset = start; 4115 if (layout != null && offset < initialOffset) { 4116 final float adjustedX = layout.getPrimaryHorizontal(offset); 4117 mTouchWordDelta = 4118 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4119 } else { 4120 mTouchWordDelta = 0.0f; 4121 } 4122 } else { 4123 offset = adjustedOffset; 4124 } 4125 positionCursor = true; 4126 } 4127 } 4128 4129 if (positionCursor) { 4130 // Handles can not cross and selection is at least one character. 4131 if (offset >= selectionEnd) { 4132 offset = getNextCursorOffset(selectionEnd, false); 4133 mTouchWordDelta = 0.0f; 4134 } 4135 positionAtCursorOffset(offset, false); 4136 } 4137 } 4138 4139 @Override 4140 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4141 super.positionAtCursorOffset(offset, parentScrolled); 4142 mInWord = !getWordIteratorWithText().isBoundary(offset); 4143 } 4144 4145 @Override 4146 public boolean onTouchEvent(MotionEvent event) { 4147 boolean superResult = super.onTouchEvent(event); 4148 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4149 // Reset the touch word offset when the user has lifted their finger. 4150 mTouchWordDelta = 0.0f; 4151 } 4152 return superResult; 4153 } 4154 } 4155 4156 private class SelectionEndHandleView extends HandleView { 4157 // Indicates whether the cursor is making adjustments within a word. 4158 private boolean mInWord = false; 4159 // Difference between touch position and word boundary position. 4160 private float mTouchWordDelta; 4161 4162 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4163 super(drawableLtr, drawableRtl); 4164 } 4165 4166 @Override 4167 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4168 if (isRtlRun) { 4169 return (drawable.getIntrinsicWidth() * 3) / 4; 4170 } else { 4171 return drawable.getIntrinsicWidth() / 4; 4172 } 4173 } 4174 4175 @Override 4176 protected int getHorizontalGravity(boolean isRtlRun) { 4177 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 4178 } 4179 4180 @Override 4181 public int getCurrentCursorOffset() { 4182 return mTextView.getSelectionEnd(); 4183 } 4184 4185 @Override 4186 public void updateSelection(int offset) { 4187 Selection.setSelection((Spannable) mTextView.getText(), 4188 mTextView.getSelectionStart(), offset); 4189 if (mTextActionMode != null) { 4190 mTextActionMode.invalidate(); 4191 } 4192 updateDrawable(); 4193 } 4194 4195 @Override 4196 public void updatePosition(float x, float y) { 4197 final int selectionStart = mTextView.getSelectionStart(); 4198 final Layout layout = mTextView.getLayout(); 4199 int initialOffset = mTextView.getOffsetForPosition(x, y); 4200 int currLine = mTextView.getLineAtCoordinate(y); 4201 boolean positionCursor = false; 4202 4203 if (initialOffset <= selectionStart) { 4204 // Handles have crossed, bound it to the first selected line and 4205 // adjust by word / char as normal. 4206 currLine = layout != null ? layout.getLineForOffset(selectionStart) : mPrevLine; 4207 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4208 } 4209 4210 int offset = initialOffset; 4211 int end = getWordEnd(offset); 4212 int start = getWordStart(offset); 4213 4214 if (offset > mPreviousOffset) { 4215 // User is increasing the selection. 4216 if (!mInWord || currLine > mPrevLine) { 4217 // We're not in a word, or we're on a different line so we'll expand by 4218 // word. First ensure the user has at least entered the next word. 4219 int midPoint = Math.min((end - start) / 2, 2); 4220 if (offset >= start + midPoint || currLine > mPrevLine) { 4221 offset = end; 4222 } else { 4223 offset = mPreviousOffset; 4224 } 4225 } 4226 if (layout != null && offset > initialOffset) { 4227 final float adjustedX = layout.getPrimaryHorizontal(offset); 4228 mTouchWordDelta = 4229 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4230 } else { 4231 mTouchWordDelta = 0.0f; 4232 } 4233 positionCursor = true; 4234 } else { 4235 final int adjustedOffset = 4236 mTextView.getOffsetAtCoordinate(currLine, x + mTouchWordDelta); 4237 if (adjustedOffset < mPreviousOffset || currLine < mPrevLine) { 4238 // User is shrinking the selection. 4239 if (currLine < mPrevLine) { 4240 // We're on a different line, so we'll snap to word boundaries. 4241 offset = end; 4242 if (layout != null && offset > initialOffset) { 4243 final float adjustedX = layout.getPrimaryHorizontal(offset); 4244 mTouchWordDelta = 4245 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4246 } else { 4247 mTouchWordDelta = 0.0f; 4248 } 4249 } else { 4250 offset = adjustedOffset; 4251 } 4252 positionCursor = true; 4253 } 4254 } 4255 4256 if (positionCursor) { 4257 // Handles can not cross and selection is at least one character. 4258 if (offset <= selectionStart) { 4259 offset = getNextCursorOffset(selectionStart, true); 4260 mTouchWordDelta = 0.0f; 4261 } 4262 positionAtCursorOffset(offset, false); 4263 } 4264 } 4265 4266 @Override 4267 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4268 super.positionAtCursorOffset(offset, parentScrolled); 4269 mInWord = !getWordIteratorWithText().isBoundary(offset); 4270 } 4271 4272 @Override 4273 public boolean onTouchEvent(MotionEvent event) { 4274 boolean superResult = super.onTouchEvent(event); 4275 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4276 // Reset the touch word offset when the user has lifted their finger. 4277 mTouchWordDelta = 0.0f; 4278 } 4279 return superResult; 4280 } 4281 } 4282 4283 /** 4284 * A CursorController instance can be used to control a cursor in the text. 4285 */ 4286 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4287 /** 4288 * Makes the cursor controller visible on screen. 4289 * See also {@link #hide()}. 4290 */ 4291 public void show(); 4292 4293 /** 4294 * Hide the cursor controller from screen. 4295 * See also {@link #show()}. 4296 */ 4297 public void hide(); 4298 4299 /** 4300 * Called when the view is detached from window. Perform house keeping task, such as 4301 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4302 * preventing the activity from being recycled. 4303 */ 4304 public void onDetached(); 4305 } 4306 4307 private class InsertionPointCursorController implements CursorController { 4308 private InsertionHandleView mHandle; 4309 4310 public void show() { 4311 getHandle().show(); 4312 4313 if (mSelectionModifierCursorController != null) { 4314 mSelectionModifierCursorController.hide(); 4315 } 4316 } 4317 4318 public void hide() { 4319 if (mHandle != null) { 4320 mHandle.hide(); 4321 } 4322 } 4323 4324 public void onTouchModeChanged(boolean isInTouchMode) { 4325 if (!isInTouchMode) { 4326 hide(); 4327 } 4328 } 4329 4330 private InsertionHandleView getHandle() { 4331 if (mSelectHandleCenter == null) { 4332 mSelectHandleCenter = mTextView.getContext().getDrawable( 4333 mTextView.mTextSelectHandleRes); 4334 } 4335 if (mHandle == null) { 4336 mHandle = new InsertionHandleView(mSelectHandleCenter); 4337 } 4338 return mHandle; 4339 } 4340 4341 @Override 4342 public void onDetached() { 4343 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4344 observer.removeOnTouchModeChangeListener(this); 4345 4346 if (mHandle != null) mHandle.onDetached(); 4347 } 4348 } 4349 4350 class SelectionModifierCursorController implements CursorController { 4351 // The cursor controller handles, lazily created when shown. 4352 private SelectionStartHandleView mStartHandle; 4353 private SelectionEndHandleView mEndHandle; 4354 // The offsets of that last touch down event. Remembered to start selection there. 4355 private int mMinTouchOffset, mMaxTouchOffset; 4356 4357 private float mDownPositionX, mDownPositionY; 4358 private boolean mGestureStayedInTapRegion; 4359 4360 // Where the user first starts the drag motion. 4361 private int mStartOffset = -1; 4362 // Indicates whether the user is selecting text and using the drag accelerator. 4363 private boolean mDragAcceleratorActive; 4364 private boolean mHaventMovedEnoughToStartDrag; 4365 4366 SelectionModifierCursorController() { 4367 resetTouchOffsets(); 4368 } 4369 4370 public void show() { 4371 if (mTextView.isInBatchEditMode()) { 4372 return; 4373 } 4374 initDrawables(); 4375 initHandles(); 4376 hideInsertionPointCursorController(); 4377 } 4378 4379 private void initDrawables() { 4380 if (mSelectHandleLeft == null) { 4381 mSelectHandleLeft = mTextView.getContext().getDrawable( 4382 mTextView.mTextSelectHandleLeftRes); 4383 } 4384 if (mSelectHandleRight == null) { 4385 mSelectHandleRight = mTextView.getContext().getDrawable( 4386 mTextView.mTextSelectHandleRightRes); 4387 } 4388 } 4389 4390 private void initHandles() { 4391 // Lazy object creation has to be done before updatePosition() is called. 4392 if (mStartHandle == null) { 4393 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4394 } 4395 if (mEndHandle == null) { 4396 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4397 } 4398 4399 mStartHandle.show(); 4400 mEndHandle.show(); 4401 4402 hideInsertionPointCursorController(); 4403 } 4404 4405 public void hide() { 4406 if (mStartHandle != null) mStartHandle.hide(); 4407 if (mEndHandle != null) mEndHandle.hide(); 4408 } 4409 4410 public void enterDrag() { 4411 // Just need to init the handles / hide insertion cursor. 4412 show(); 4413 mDragAcceleratorActive = true; 4414 // Start location of selection. 4415 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4416 mLastDownPositionY); 4417 // Don't show the handles until user has lifted finger. 4418 hide(); 4419 4420 // This stops scrolling parents from intercepting the touch event, allowing 4421 // the user to continue dragging across the screen to select text; TextView will 4422 // scroll as necessary. 4423 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4424 } 4425 4426 public void onTouchEvent(MotionEvent event) { 4427 // This is done even when the View does not have focus, so that long presses can start 4428 // selection and tap can move cursor from this tap position. 4429 final float eventX = event.getX(); 4430 final float eventY = event.getY(); 4431 switch (event.getActionMasked()) { 4432 case MotionEvent.ACTION_DOWN: 4433 4434 // Remember finger down position, to be able to start selection from there. 4435 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 4436 eventX, eventY); 4437 4438 // Double tap detection 4439 if (mGestureStayedInTapRegion) { 4440 if (mDoubleTap) { 4441 final float deltaX = eventX - mDownPositionX; 4442 final float deltaY = eventY - mDownPositionY; 4443 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4444 4445 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4446 mTextView.getContext()); 4447 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4448 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4449 4450 if (stayedInArea && isPositionOnText(eventX, eventY)) { 4451 selectCurrentWordAndStartDrag(); 4452 mDiscardNextActionUp = true; 4453 } 4454 } 4455 } 4456 4457 mDownPositionX = eventX; 4458 mDownPositionY = eventY; 4459 mGestureStayedInTapRegion = true; 4460 mHaventMovedEnoughToStartDrag = true; 4461 break; 4462 4463 case MotionEvent.ACTION_POINTER_DOWN: 4464 case MotionEvent.ACTION_POINTER_UP: 4465 // Handle multi-point gestures. Keep min and max offset positions. 4466 // Only activated for devices that correctly handle multi-touch. 4467 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4468 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4469 updateMinAndMaxOffsets(event); 4470 } 4471 break; 4472 4473 case MotionEvent.ACTION_MOVE: 4474 final ViewConfiguration viewConfig = ViewConfiguration.get( 4475 mTextView.getContext()); 4476 final int touchSlop = viewConfig.getScaledTouchSlop(); 4477 4478 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 4479 final float deltaX = eventX - mDownPositionX; 4480 final float deltaY = eventY - mDownPositionY; 4481 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4482 4483 if (mGestureStayedInTapRegion) { 4484 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 4485 mGestureStayedInTapRegion = 4486 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 4487 } 4488 if (mHaventMovedEnoughToStartDrag) { 4489 // We don't start dragging until the user has moved enough. 4490 mHaventMovedEnoughToStartDrag = 4491 distanceSquared <= touchSlop * touchSlop; 4492 } 4493 } 4494 4495 if (mStartHandle != null && mStartHandle.isShowing()) { 4496 // Don't do the drag if the handles are showing already. 4497 break; 4498 } 4499 4500 if (mStartOffset != -1) { 4501 if (!mHaventMovedEnoughToStartDrag) { 4502 // Offset the finger by the same vertical offset as the handles. This 4503 // improves visibility of the content being selected by shifting 4504 // the finger below the content. 4505 final float fingerOffset = (mStartHandle != null) 4506 ? mStartHandle.getIdealVerticalOffset() 4507 : touchSlop; 4508 int offset = 4509 mTextView.getOffsetForPosition(eventX, eventY - fingerOffset); 4510 int startOffset; 4511 // Snap to word boundaries. 4512 if (mStartOffset < offset) { 4513 // Expanding with end handle. 4514 offset = getWordEnd(offset); 4515 startOffset = getWordStart(mStartOffset); 4516 } else { 4517 // Expanding with start handle. 4518 offset = getWordStart(offset); 4519 startOffset = getWordEnd(mStartOffset); 4520 } 4521 Selection.setSelection((Spannable) mTextView.getText(), 4522 startOffset, offset); 4523 } 4524 } 4525 break; 4526 4527 case MotionEvent.ACTION_UP: 4528 if (mDragAcceleratorActive) { 4529 // No longer dragging to select text, let the parent intercept events. 4530 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4531 4532 show(); 4533 int startOffset = mTextView.getSelectionStart(); 4534 int endOffset = mTextView.getSelectionEnd(); 4535 4536 // Since we don't let drag handles pass once they're visible, we need to 4537 // make sure the start / end locations are correct because the user *can* 4538 // switch directions during the initial drag. 4539 if (endOffset < startOffset) { 4540 int tmp = endOffset; 4541 endOffset = startOffset; 4542 startOffset = tmp; 4543 4544 // Also update the selection with the right offsets in this case. 4545 Selection.setSelection((Spannable) mTextView.getText(), 4546 startOffset, endOffset); 4547 } 4548 4549 // Need to do this to display the handles. 4550 mStartHandle.showAtLocation(startOffset); 4551 mEndHandle.showAtLocation(endOffset); 4552 4553 // No longer the first dragging motion, reset. 4554 startSelectionActionMode(); 4555 mDragAcceleratorActive = false; 4556 mStartOffset = -1; 4557 } 4558 break; 4559 } 4560 } 4561 4562 /** 4563 * @param event 4564 */ 4565 private void updateMinAndMaxOffsets(MotionEvent event) { 4566 int pointerCount = event.getPointerCount(); 4567 for (int index = 0; index < pointerCount; index++) { 4568 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4569 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4570 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4571 } 4572 } 4573 4574 public int getMinTouchOffset() { 4575 return mMinTouchOffset; 4576 } 4577 4578 public int getMaxTouchOffset() { 4579 return mMaxTouchOffset; 4580 } 4581 4582 public void resetTouchOffsets() { 4583 mMinTouchOffset = mMaxTouchOffset = -1; 4584 mStartOffset = -1; 4585 mDragAcceleratorActive = false; 4586 } 4587 4588 /** 4589 * @return true iff this controller is currently used to move the selection start. 4590 */ 4591 public boolean isSelectionStartDragged() { 4592 return mStartHandle != null && mStartHandle.isDragging(); 4593 } 4594 4595 /** 4596 * @return true if the user is selecting text using the drag accelerator. 4597 */ 4598 public boolean isDragAcceleratorActive() { 4599 return mDragAcceleratorActive; 4600 } 4601 4602 public void onTouchModeChanged(boolean isInTouchMode) { 4603 if (!isInTouchMode) { 4604 hide(); 4605 } 4606 } 4607 4608 @Override 4609 public void onDetached() { 4610 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4611 observer.removeOnTouchModeChangeListener(this); 4612 4613 if (mStartHandle != null) mStartHandle.onDetached(); 4614 if (mEndHandle != null) mEndHandle.onDetached(); 4615 } 4616 } 4617 4618 private class CorrectionHighlighter { 4619 private final Path mPath = new Path(); 4620 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4621 private int mStart, mEnd; 4622 private long mFadingStartTime; 4623 private RectF mTempRectF; 4624 private final static int FADE_OUT_DURATION = 400; 4625 4626 public CorrectionHighlighter() { 4627 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4628 applicationScale); 4629 mPaint.setStyle(Paint.Style.FILL); 4630 } 4631 4632 public void highlight(CorrectionInfo info) { 4633 mStart = info.getOffset(); 4634 mEnd = mStart + info.getNewText().length(); 4635 mFadingStartTime = SystemClock.uptimeMillis(); 4636 4637 if (mStart < 0 || mEnd < 0) { 4638 stopAnimation(); 4639 } 4640 } 4641 4642 public void draw(Canvas canvas, int cursorOffsetVertical) { 4643 if (updatePath() && updatePaint()) { 4644 if (cursorOffsetVertical != 0) { 4645 canvas.translate(0, cursorOffsetVertical); 4646 } 4647 4648 canvas.drawPath(mPath, mPaint); 4649 4650 if (cursorOffsetVertical != 0) { 4651 canvas.translate(0, -cursorOffsetVertical); 4652 } 4653 invalidate(true); // TODO invalidate cursor region only 4654 } else { 4655 stopAnimation(); 4656 invalidate(false); // TODO invalidate cursor region only 4657 } 4658 } 4659 4660 private boolean updatePaint() { 4661 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4662 if (duration > FADE_OUT_DURATION) return false; 4663 4664 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4665 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4666 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4667 ((int) (highlightColorAlpha * coef) << 24); 4668 mPaint.setColor(color); 4669 return true; 4670 } 4671 4672 private boolean updatePath() { 4673 final Layout layout = mTextView.getLayout(); 4674 if (layout == null) return false; 4675 4676 // Update in case text is edited while the animation is run 4677 final int length = mTextView.getText().length(); 4678 int start = Math.min(length, mStart); 4679 int end = Math.min(length, mEnd); 4680 4681 mPath.reset(); 4682 layout.getSelectionPath(start, end, mPath); 4683 return true; 4684 } 4685 4686 private void invalidate(boolean delayed) { 4687 if (mTextView.getLayout() == null) return; 4688 4689 if (mTempRectF == null) mTempRectF = new RectF(); 4690 mPath.computeBounds(mTempRectF, false); 4691 4692 int left = mTextView.getCompoundPaddingLeft(); 4693 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4694 4695 if (delayed) { 4696 mTextView.postInvalidateOnAnimation( 4697 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4698 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4699 } else { 4700 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4701 (int) mTempRectF.right, (int) mTempRectF.bottom); 4702 } 4703 } 4704 4705 private void stopAnimation() { 4706 Editor.this.mCorrectionHighlighter = null; 4707 } 4708 } 4709 4710 private static class ErrorPopup extends PopupWindow { 4711 private boolean mAbove = false; 4712 private final TextView mView; 4713 private int mPopupInlineErrorBackgroundId = 0; 4714 private int mPopupInlineErrorAboveBackgroundId = 0; 4715 4716 ErrorPopup(TextView v, int width, int height) { 4717 super(v, width, height); 4718 mView = v; 4719 // Make sure the TextView has a background set as it will be used the first time it is 4720 // shown and positioned. Initialized with below background, which should have 4721 // dimensions identical to the above version for this to work (and is more likely). 4722 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4723 com.android.internal.R.styleable.Theme_errorMessageBackground); 4724 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4725 } 4726 4727 void fixDirection(boolean above) { 4728 mAbove = above; 4729 4730 if (above) { 4731 mPopupInlineErrorAboveBackgroundId = 4732 getResourceId(mPopupInlineErrorAboveBackgroundId, 4733 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4734 } else { 4735 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4736 com.android.internal.R.styleable.Theme_errorMessageBackground); 4737 } 4738 4739 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4740 mPopupInlineErrorBackgroundId); 4741 } 4742 4743 private int getResourceId(int currentId, int index) { 4744 if (currentId == 0) { 4745 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4746 R.styleable.Theme); 4747 currentId = styledAttributes.getResourceId(index, 0); 4748 styledAttributes.recycle(); 4749 } 4750 return currentId; 4751 } 4752 4753 @Override 4754 public void update(int x, int y, int w, int h, boolean force) { 4755 super.update(x, y, w, h, force); 4756 4757 boolean above = isAboveAnchor(); 4758 if (above != mAbove) { 4759 fixDirection(above); 4760 } 4761 } 4762 } 4763 4764 static class InputContentType { 4765 int imeOptions = EditorInfo.IME_NULL; 4766 String privateImeOptions; 4767 CharSequence imeActionLabel; 4768 int imeActionId; 4769 Bundle extras; 4770 OnEditorActionListener onEditorActionListener; 4771 boolean enterDown; 4772 } 4773 4774 static class InputMethodState { 4775 ExtractedTextRequest mExtractedTextRequest; 4776 final ExtractedText mExtractedText = new ExtractedText(); 4777 int mBatchEditNesting; 4778 boolean mCursorChanged; 4779 boolean mSelectionModeChanged; 4780 boolean mContentChanged; 4781 int mChangedStart, mChangedEnd, mChangedDelta; 4782 } 4783 4784 /** 4785 * @return True iff (start, end) is a valid range within the text. 4786 */ 4787 private static boolean isValidRange(CharSequence text, int start, int end) { 4788 return 0 <= start && start <= end && end <= text.length(); 4789 } 4790 4791 /** 4792 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4793 * text being typed (and hence always returns null from the filter() method). 4794 */ 4795 public static class UndoInputFilter implements InputFilter { 4796 private final Editor mEditor; 4797 4798 // Whether the current filter pass is directly caused by an end-user text edit. 4799 private boolean mIsUserEdit; 4800 4801 // Whether the text field is handling an IME composition. Must be parceled in case the user 4802 // rotates the screen during composition. 4803 private boolean mHasComposition; 4804 4805 public UndoInputFilter(Editor editor) { 4806 mEditor = editor; 4807 } 4808 4809 public void saveInstanceState(Parcel parcel) { 4810 parcel.writeInt(mIsUserEdit ? 1 : 0); 4811 parcel.writeInt(mHasComposition ? 1 : 0); 4812 } 4813 4814 public void restoreInstanceState(Parcel parcel) { 4815 mIsUserEdit = parcel.readInt() != 0; 4816 mHasComposition = parcel.readInt() != 0; 4817 } 4818 4819 /** 4820 * Signals that a user-triggered edit is starting. 4821 */ 4822 public void beginBatchEdit() { 4823 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4824 mIsUserEdit = true; 4825 } 4826 4827 public void endBatchEdit() { 4828 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4829 mIsUserEdit = false; 4830 } 4831 4832 @Override 4833 public CharSequence filter(CharSequence source, int start, int end, 4834 Spanned dest, int dstart, int dend) { 4835 if (DEBUG_UNDO) { 4836 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4837 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4838 } 4839 4840 // Check to see if this edit should be tracked for undo. 4841 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4842 return null; 4843 } 4844 4845 // Check for and handle IME composition edits. 4846 if (handleCompositionEdit(source, start, end, dstart)) { 4847 return null; 4848 } 4849 4850 // Handle keyboard edits. 4851 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4852 return null; 4853 } 4854 4855 /** 4856 * Returns true iff the edit was handled, either because it should be ignored or because 4857 * this function created an undo operation for it. 4858 */ 4859 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4860 // Ignore edits while the user is composing. 4861 if (isComposition(source)) { 4862 mHasComposition = true; 4863 return true; 4864 } 4865 final boolean hadComposition = mHasComposition; 4866 mHasComposition = false; 4867 4868 // Check for the transition out of the composing state. 4869 if (hadComposition) { 4870 // If there was no text the user canceled composition. Ignore the edit. 4871 if (start == end) { 4872 return true; 4873 } 4874 4875 // Otherwise the user inserted the composition. 4876 String newText = TextUtils.substring(source, start, end); 4877 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4878 recordEdit(edit, false /* forceMerge */); 4879 return true; 4880 } 4881 4882 // This was neither a composition event nor a transition out of composing. 4883 return false; 4884 } 4885 4886 private void handleKeyboardEdit(CharSequence source, int start, int end, 4887 Spanned dest, int dstart, int dend) { 4888 // An application may install a TextWatcher to provide additional modifications after 4889 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4890 // string). This results in multiple filter() calls for what the user considers to be 4891 // a single operation. Always undo the whole set of changes in one step. 4892 final boolean forceMerge = isInTextWatcher(); 4893 4894 // Build a new operation with all the information from this edit. 4895 String newText = TextUtils.substring(source, start, end); 4896 String oldText = TextUtils.substring(dest, dstart, dend); 4897 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4898 recordEdit(edit, forceMerge); 4899 } 4900 4901 /** 4902 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4903 * If forceMerge is true then the new edit is always merged. 4904 */ 4905 private void recordEdit(EditOperation edit, boolean forceMerge) { 4906 // Fetch the last edit operation and attempt to merge in the new edit. 4907 final UndoManager um = mEditor.mUndoManager; 4908 um.beginUpdate("Edit text"); 4909 EditOperation lastEdit = um.getLastOperation( 4910 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4911 if (lastEdit == null) { 4912 // Add this as the first edit. 4913 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4914 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4915 } else if (forceMerge) { 4916 // Forced merges take priority because they could be the result of a non-user-edit 4917 // change and this case should not create a new undo operation. 4918 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4919 lastEdit.forceMergeWith(edit); 4920 } else if (!mIsUserEdit) { 4921 // An application directly modified the Editable outside of a text edit. Treat this 4922 // as a new change and don't attempt to merge. 4923 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4924 um.commitState(mEditor.mUndoOwner); 4925 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4926 } else if (lastEdit.mergeWith(edit)) { 4927 // Merge succeeded, nothing else to do. 4928 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4929 } else { 4930 // Could not merge with the last edit, so commit the last edit and add this edit. 4931 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4932 um.commitState(mEditor.mUndoOwner); 4933 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4934 } 4935 um.endUpdate(); 4936 } 4937 4938 private boolean canUndoEdit(CharSequence source, int start, int end, 4939 Spanned dest, int dstart, int dend) { 4940 if (!mEditor.mAllowUndo) { 4941 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4942 return false; 4943 } 4944 4945 if (mEditor.mUndoManager.isInUndo()) { 4946 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4947 return false; 4948 } 4949 4950 // Text filters run before input operations are applied. However, some input operations 4951 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4952 // attempt to undo invalid operations. 4953 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4954 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4955 return false; 4956 } 4957 4958 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4959 // on an input field. Skip no-op changes. 4960 if (start == end && dstart == dend) { 4961 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4962 return false; 4963 } 4964 4965 return true; 4966 } 4967 4968 private boolean isComposition(CharSequence source) { 4969 if (!(source instanceof Spannable)) { 4970 return false; 4971 } 4972 // This is a composition edit if the source has a non-zero-length composing span. 4973 Spannable text = (Spannable) source; 4974 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4975 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4976 return composeBegin < composeEnd; 4977 } 4978 4979 private boolean isInTextWatcher() { 4980 CharSequence text = mEditor.mTextView.getText(); 4981 return (text instanceof SpannableStringBuilder) 4982 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4983 } 4984 } 4985 4986 /** 4987 * An operation to undo a single "edit" to a text view. 4988 */ 4989 public static class EditOperation extends UndoOperation<Editor> { 4990 private static final int TYPE_INSERT = 0; 4991 private static final int TYPE_DELETE = 1; 4992 private static final int TYPE_REPLACE = 2; 4993 4994 private int mType; 4995 private String mOldText; 4996 private int mOldTextStart; 4997 private String mNewText; 4998 private int mNewTextStart; 4999 5000 private int mOldCursorPos; 5001 private int mNewCursorPos; 5002 5003 /** 5004 * Constructs an edit operation from a text input operation on editor that replaces the 5005 * oldText starting at dstart with newText. 5006 */ 5007 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 5008 super(editor.mUndoOwner); 5009 mOldText = oldText; 5010 mNewText = newText; 5011 5012 // Determine the type of the edit and store where it occurred. Avoid storing 5013 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 5014 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 5015 // outside the bounds of the final text). 5016 if (mNewText.length() > 0 && mOldText.length() == 0) { 5017 mType = TYPE_INSERT; 5018 mNewTextStart = dstart; 5019 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 5020 mType = TYPE_DELETE; 5021 mOldTextStart = dstart; 5022 } else { 5023 mType = TYPE_REPLACE; 5024 mOldTextStart = mNewTextStart = dstart; 5025 } 5026 5027 // Store cursor data. 5028 mOldCursorPos = editor.mTextView.getSelectionStart(); 5029 mNewCursorPos = dstart + mNewText.length(); 5030 } 5031 5032 public EditOperation(Parcel src, ClassLoader loader) { 5033 super(src, loader); 5034 mType = src.readInt(); 5035 mOldText = src.readString(); 5036 mOldTextStart = src.readInt(); 5037 mNewText = src.readString(); 5038 mNewTextStart = src.readInt(); 5039 mOldCursorPos = src.readInt(); 5040 mNewCursorPos = src.readInt(); 5041 } 5042 5043 @Override 5044 public void writeToParcel(Parcel dest, int flags) { 5045 dest.writeInt(mType); 5046 dest.writeString(mOldText); 5047 dest.writeInt(mOldTextStart); 5048 dest.writeString(mNewText); 5049 dest.writeInt(mNewTextStart); 5050 dest.writeInt(mOldCursorPos); 5051 dest.writeInt(mNewCursorPos); 5052 } 5053 5054 private int getNewTextEnd() { 5055 return mNewTextStart + mNewText.length(); 5056 } 5057 5058 private int getOldTextEnd() { 5059 return mOldTextStart + mOldText.length(); 5060 } 5061 5062 @Override 5063 public void commit() { 5064 } 5065 5066 @Override 5067 public void undo() { 5068 if (DEBUG_UNDO) Log.d(TAG, "undo"); 5069 // Remove the new text and insert the old. 5070 Editor editor = getOwnerData(); 5071 Editable text = (Editable) editor.mTextView.getText(); 5072 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5073 mOldCursorPos); 5074 } 5075 5076 @Override 5077 public void redo() { 5078 if (DEBUG_UNDO) Log.d(TAG, "redo"); 5079 // Remove the old text and insert the new. 5080 Editor editor = getOwnerData(); 5081 Editable text = (Editable) editor.mTextView.getText(); 5082 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 5083 mNewCursorPos); 5084 } 5085 5086 /** 5087 * Attempts to merge this existing operation with a new edit. 5088 * @param edit The new edit operation. 5089 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 5090 * object unchanged. 5091 */ 5092 private boolean mergeWith(EditOperation edit) { 5093 if (DEBUG_UNDO) { 5094 Log.d(TAG, "mergeWith old " + this); 5095 Log.d(TAG, "mergeWith new " + edit); 5096 } 5097 switch (mType) { 5098 case TYPE_INSERT: 5099 return mergeInsertWith(edit); 5100 case TYPE_DELETE: 5101 return mergeDeleteWith(edit); 5102 case TYPE_REPLACE: 5103 return mergeReplaceWith(edit); 5104 default: 5105 return false; 5106 } 5107 } 5108 5109 private boolean mergeInsertWith(EditOperation edit) { 5110 // Only merge continuous insertions. 5111 if (edit.mType != TYPE_INSERT) { 5112 return false; 5113 } 5114 // Only merge insertions that are contiguous. 5115 if (getNewTextEnd() != edit.mNewTextStart) { 5116 return false; 5117 } 5118 mNewText += edit.mNewText; 5119 mNewCursorPos = edit.mNewCursorPos; 5120 return true; 5121 } 5122 5123 // TODO: Support forward delete. 5124 private boolean mergeDeleteWith(EditOperation edit) { 5125 // Only merge continuous deletes. 5126 if (edit.mType != TYPE_DELETE) { 5127 return false; 5128 } 5129 // Only merge deletions that are contiguous. 5130 if (mOldTextStart != edit.getOldTextEnd()) { 5131 return false; 5132 } 5133 mOldTextStart = edit.mOldTextStart; 5134 mOldText = edit.mOldText + mOldText; 5135 mNewCursorPos = edit.mNewCursorPos; 5136 return true; 5137 } 5138 5139 private boolean mergeReplaceWith(EditOperation edit) { 5140 // Replacements can merge only with adjacent inserts. 5141 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5142 return false; 5143 } 5144 mOldText += edit.mOldText; 5145 mNewText += edit.mNewText; 5146 mNewCursorPos = edit.mNewCursorPos; 5147 return true; 5148 } 5149 5150 /** 5151 * Forcibly creates a single merged edit operation by simulating the entire text 5152 * contents being replaced. 5153 */ 5154 public void forceMergeWith(EditOperation edit) { 5155 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5156 Editor editor = getOwnerData(); 5157 5158 // Copy the text of the current field. 5159 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5160 // but would require two parallel implementations of modifyText() because Editable and 5161 // StringBuilder do not share an interface for replace/delete/insert. 5162 Editable editable = (Editable) editor.mTextView.getText(); 5163 Editable originalText = new SpannableStringBuilder(editable.toString()); 5164 5165 // Roll back the last operation. 5166 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5167 mOldCursorPos); 5168 5169 // Clone the text again and apply the new operation. 5170 Editable finalText = new SpannableStringBuilder(editable.toString()); 5171 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5172 edit.mNewTextStart, edit.mNewCursorPos); 5173 5174 // Convert this operation into a non-mergeable replacement of the entire string. 5175 mType = TYPE_REPLACE; 5176 mNewText = finalText.toString(); 5177 mNewTextStart = 0; 5178 mOldText = originalText.toString(); 5179 mOldTextStart = 0; 5180 mNewCursorPos = edit.mNewCursorPos; 5181 // mOldCursorPos is unchanged. 5182 } 5183 5184 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5185 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5186 // Apply the edit if it is still valid. 5187 if (isValidRange(text, deleteFrom, deleteTo) && 5188 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5189 if (deleteFrom != deleteTo) { 5190 text.delete(deleteFrom, deleteTo); 5191 } 5192 if (newText.length() != 0) { 5193 text.insert(newTextInsertAt, newText); 5194 } 5195 } 5196 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5197 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5198 // TODO: Select all the text that was undone. 5199 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5200 Selection.setSelection(text, newCursorPos); 5201 } 5202 } 5203 5204 private String getTypeString() { 5205 switch (mType) { 5206 case TYPE_INSERT: 5207 return "insert"; 5208 case TYPE_DELETE: 5209 return "delete"; 5210 case TYPE_REPLACE: 5211 return "replace"; 5212 default: 5213 return ""; 5214 } 5215 } 5216 5217 @Override 5218 public String toString() { 5219 return "[mType=" + getTypeString() + ", " + 5220 "mOldText=" + mOldText + ", " + 5221 "mOldTextStart=" + mOldTextStart + ", " + 5222 "mNewText=" + mNewText + ", " + 5223 "mNewTextStart=" + mNewTextStart + ", " + 5224 "mOldCursorPos=" + mOldCursorPos + ", " + 5225 "mNewCursorPos=" + mNewCursorPos + "]"; 5226 } 5227 5228 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5229 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5230 @Override 5231 public EditOperation createFromParcel(Parcel in) { 5232 return new EditOperation(in, null); 5233 } 5234 5235 @Override 5236 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5237 return new EditOperation(in, loader); 5238 } 5239 5240 @Override 5241 public EditOperation[] newArray(int size) { 5242 return new EditOperation[size]; 5243 } 5244 }; 5245 } 5246} 5247