Editor.java revision 27a63612343a3b4afb4deca6a992615855510963
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 // Each Editor manages its own undo stack. 129 private final UndoManager mUndoManager = new UndoManager(); 130 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 131 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 132 boolean mAllowUndo = true; 133 134 // Cursor Controllers. 135 InsertionPointCursorController mInsertionPointCursorController; 136 SelectionModifierCursorController mSelectionModifierCursorController; 137 ActionMode mSelectionActionMode; 138 boolean mInsertionControllerEnabled; 139 boolean mSelectionControllerEnabled; 140 141 // Used to highlight a word when it is corrected by the IME 142 CorrectionHighlighter mCorrectionHighlighter; 143 144 InputContentType mInputContentType; 145 InputMethodState mInputMethodState; 146 147 private static class TextRenderNode { 148 RenderNode renderNode; 149 boolean isDirty; 150 public TextRenderNode(String name) { 151 isDirty = true; 152 renderNode = RenderNode.create(name, null); 153 } 154 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 155 } 156 TextRenderNode[] mTextRenderNodes; 157 158 boolean mFrozenWithFocus; 159 boolean mSelectionMoved; 160 boolean mTouchFocusSelected; 161 162 KeyListener mKeyListener; 163 int mInputType = EditorInfo.TYPE_NULL; 164 165 boolean mDiscardNextActionUp; 166 boolean mIgnoreActionUpEvent; 167 168 long mShowCursor; 169 Blink mBlink; 170 171 boolean mCursorVisible = true; 172 boolean mSelectAllOnFocus; 173 boolean mTextIsSelectable; 174 175 CharSequence mError; 176 boolean mErrorWasChanged; 177 ErrorPopup mErrorPopup; 178 179 /** 180 * This flag is set if the TextView tries to display an error before it 181 * is attached to the window (so its position is still unknown). 182 * It causes the error to be shown later, when onAttachedToWindow() 183 * is called. 184 */ 185 boolean mShowErrorAfterAttach; 186 187 boolean mInBatchEditControllers; 188 boolean mShowSoftInputOnFocus = true; 189 boolean mPreserveDetachedSelection; 190 boolean mTemporaryDetach; 191 192 SuggestionsPopupWindow mSuggestionsPopupWindow; 193 SuggestionRangeSpan mSuggestionRangeSpan; 194 Runnable mShowSuggestionRunnable; 195 196 final Drawable[] mCursorDrawable = new Drawable[2]; 197 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 198 199 private Drawable mSelectHandleLeft; 200 private Drawable mSelectHandleRight; 201 private Drawable mSelectHandleCenter; 202 203 // Global listener that detects changes in the global position of the TextView 204 private PositionListener mPositionListener; 205 206 float mLastDownPositionX, mLastDownPositionY; 207 Callback mCustomSelectionActionModeCallback; 208 209 // Set when this TextView gained focus with some text selected. Will start selection mode. 210 boolean mCreatedWithASelection; 211 212 boolean mDoubleTap = false; 213 214 private Runnable mSelectionModeWithoutSelectionRunnable; 215 216 // The span controller helps monitoring the changes to which the Editor needs to react: 217 // - EasyEditSpans, for which we have some UI to display on attach and on hide 218 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 219 private SpanController mSpanController; 220 221 WordIterator mWordIterator; 222 SpellChecker mSpellChecker; 223 224 // This word iterator is set with text and used to determine word boundaries 225 // when a user is selecting text. 226 private WordIterator mWordIteratorWithText; 227 // Indicate that the text in the word iterator needs to be updated. 228 private boolean mUpdateWordIteratorText; 229 230 private Rect mTempRect; 231 232 private TextView mTextView; 233 234 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 235 236 private final Runnable mHideFloatingToolbar = new Runnable() { 237 @Override 238 public void run() { 239 if (mSelectionActionMode != null) { 240 mSelectionActionMode.snooze(ActionMode.SNOOZE_TIME_DEFAULT); 241 } 242 } 243 }; 244 245 private final Runnable mShowFloatingToolbar = new Runnable() { 246 @Override 247 public void run() { 248 if (mSelectionActionMode != null) { 249 mSelectionActionMode.snooze(0); // snooze off. 250 } 251 } 252 }; 253 254 Editor(TextView textView) { 255 mTextView = textView; 256 // Synchronize the filter list, which places the undo input filter at the end. 257 mTextView.setFilters(mTextView.getFilters()); 258 } 259 260 ParcelableParcel saveInstanceState() { 261 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 262 Parcel parcel = state.getParcel(); 263 mUndoManager.saveInstanceState(parcel); 264 mUndoInputFilter.saveInstanceState(parcel); 265 return state; 266 } 267 268 void restoreInstanceState(ParcelableParcel state) { 269 Parcel parcel = state.getParcel(); 270 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 271 mUndoInputFilter.restoreInstanceState(parcel); 272 // Re-associate this object as the owner of undo state. 273 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 274 } 275 276 /** 277 * Forgets all undo and redo operations for this Editor. 278 */ 279 void forgetUndoRedo() { 280 UndoOwner[] owners = { mUndoOwner }; 281 mUndoManager.forgetUndos(owners, -1 /* all */); 282 mUndoManager.forgetRedos(owners, -1 /* all */); 283 } 284 285 boolean canUndo() { 286 UndoOwner[] owners = { mUndoOwner }; 287 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 288 } 289 290 boolean canRedo() { 291 UndoOwner[] owners = { mUndoOwner }; 292 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 293 } 294 295 void undo() { 296 if (!mAllowUndo) { 297 return; 298 } 299 UndoOwner[] owners = { mUndoOwner }; 300 mUndoManager.undo(owners, 1); // Undo 1 action. 301 } 302 303 void redo() { 304 if (!mAllowUndo) { 305 return; 306 } 307 UndoOwner[] owners = { mUndoOwner }; 308 mUndoManager.redo(owners, 1); // Redo 1 action. 309 } 310 311 void replace() { 312 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 313 stopSelectionActionMode(); 314 Selection.setSelection((Spannable) mTextView.getText(), middle); 315 showSuggestions(); 316 } 317 318 void onAttachedToWindow() { 319 if (mShowErrorAfterAttach) { 320 showError(); 321 mShowErrorAfterAttach = false; 322 } 323 mTemporaryDetach = false; 324 325 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 326 // No need to create the controller. 327 // The get method will add the listener on controller creation. 328 if (mInsertionPointCursorController != null) { 329 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 330 } 331 if (mSelectionModifierCursorController != null) { 332 mSelectionModifierCursorController.resetTouchOffsets(); 333 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 334 } 335 updateSpellCheckSpans(0, mTextView.getText().length(), 336 true /* create the spell checker if needed */); 337 338 if (mTextView.hasTransientState() && 339 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 340 // Since transient state is reference counted make sure it stays matched 341 // with our own calls to it for managing selection. 342 // The action mode callback will set this back again when/if the action mode starts. 343 mTextView.setHasTransientState(false); 344 345 // We had an active selection from before, start the selection mode. 346 startSelectionActionModeWithSelection(); 347 } 348 349 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 350 resumeBlink(); 351 } 352 353 void onDetachedFromWindow() { 354 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 355 356 if (mError != null) { 357 hideError(); 358 } 359 360 suspendBlink(); 361 362 if (mInsertionPointCursorController != null) { 363 mInsertionPointCursorController.onDetached(); 364 } 365 366 if (mSelectionModifierCursorController != null) { 367 mSelectionModifierCursorController.onDetached(); 368 } 369 370 if (mShowSuggestionRunnable != null) { 371 mTextView.removeCallbacks(mShowSuggestionRunnable); 372 } 373 374 // Cancel the single tap delayed runnable. 375 if (mSelectionModeWithoutSelectionRunnable != null) { 376 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 377 } 378 379 mTextView.removeCallbacks(mHideFloatingToolbar); 380 mTextView.removeCallbacks(mShowFloatingToolbar); 381 382 destroyDisplayListsData(); 383 384 if (mSpellChecker != null) { 385 mSpellChecker.closeSession(); 386 // Forces the creation of a new SpellChecker next time this window is created. 387 // Will handle the cases where the settings has been changed in the meantime. 388 mSpellChecker = null; 389 } 390 391 mPreserveDetachedSelection = true; 392 hideControllers(); 393 mPreserveDetachedSelection = false; 394 mTemporaryDetach = false; 395 } 396 397 private void destroyDisplayListsData() { 398 if (mTextRenderNodes != null) { 399 for (int i = 0; i < mTextRenderNodes.length; i++) { 400 RenderNode displayList = mTextRenderNodes[i] != null 401 ? mTextRenderNodes[i].renderNode : null; 402 if (displayList != null && displayList.isValid()) { 403 displayList.destroyDisplayListData(); 404 } 405 } 406 } 407 } 408 409 private void showError() { 410 if (mTextView.getWindowToken() == null) { 411 mShowErrorAfterAttach = true; 412 return; 413 } 414 415 if (mErrorPopup == null) { 416 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 417 final TextView err = (TextView) inflater.inflate( 418 com.android.internal.R.layout.textview_hint, null); 419 420 final float scale = mTextView.getResources().getDisplayMetrics().density; 421 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 422 mErrorPopup.setFocusable(false); 423 // The user is entering text, so the input method is needed. We 424 // don't want the popup to be displayed on top of it. 425 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 426 } 427 428 TextView tv = (TextView) mErrorPopup.getContentView(); 429 chooseSize(mErrorPopup, mError, tv); 430 tv.setText(mError); 431 432 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 433 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 434 } 435 436 public void setError(CharSequence error, Drawable icon) { 437 mError = TextUtils.stringOrSpannedString(error); 438 mErrorWasChanged = true; 439 440 if (mError == null) { 441 setErrorIcon(null); 442 if (mErrorPopup != null) { 443 if (mErrorPopup.isShowing()) { 444 mErrorPopup.dismiss(); 445 } 446 447 mErrorPopup = null; 448 } 449 mShowErrorAfterAttach = false; 450 } else { 451 setErrorIcon(icon); 452 if (mTextView.isFocused()) { 453 showError(); 454 } 455 } 456 } 457 458 private void setErrorIcon(Drawable icon) { 459 Drawables dr = mTextView.mDrawables; 460 if (dr == null) { 461 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 462 } 463 dr.setErrorDrawable(icon, mTextView); 464 465 mTextView.resetResolvedDrawables(); 466 mTextView.invalidate(); 467 mTextView.requestLayout(); 468 } 469 470 private void hideError() { 471 if (mErrorPopup != null) { 472 if (mErrorPopup.isShowing()) { 473 mErrorPopup.dismiss(); 474 } 475 } 476 477 mShowErrorAfterAttach = false; 478 } 479 480 /** 481 * Returns the X offset to make the pointy top of the error point 482 * at the middle of the error icon. 483 */ 484 private int getErrorX() { 485 /* 486 * The "25" is the distance between the point and the right edge 487 * of the background 488 */ 489 final float scale = mTextView.getResources().getDisplayMetrics().density; 490 491 final Drawables dr = mTextView.mDrawables; 492 493 final int layoutDirection = mTextView.getLayoutDirection(); 494 int errorX; 495 int offset; 496 switch (layoutDirection) { 497 default: 498 case View.LAYOUT_DIRECTION_LTR: 499 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 500 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 501 mTextView.getPaddingRight() + offset; 502 break; 503 case View.LAYOUT_DIRECTION_RTL: 504 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 505 errorX = mTextView.getPaddingLeft() + offset; 506 break; 507 } 508 return errorX; 509 } 510 511 /** 512 * Returns the Y offset to make the pointy top of the error point 513 * at the bottom of the error icon. 514 */ 515 private int getErrorY() { 516 /* 517 * Compound, not extended, because the icon is not clipped 518 * if the text height is smaller. 519 */ 520 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 521 int vspace = mTextView.getBottom() - mTextView.getTop() - 522 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 523 524 final Drawables dr = mTextView.mDrawables; 525 526 final int layoutDirection = mTextView.getLayoutDirection(); 527 int height; 528 switch (layoutDirection) { 529 default: 530 case View.LAYOUT_DIRECTION_LTR: 531 height = (dr != null ? dr.mDrawableHeightRight : 0); 532 break; 533 case View.LAYOUT_DIRECTION_RTL: 534 height = (dr != null ? dr.mDrawableHeightLeft : 0); 535 break; 536 } 537 538 int icontop = compoundPaddingTop + (vspace - height) / 2; 539 540 /* 541 * The "2" is the distance between the point and the top edge 542 * of the background. 543 */ 544 final float scale = mTextView.getResources().getDisplayMetrics().density; 545 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 546 } 547 548 void createInputContentTypeIfNeeded() { 549 if (mInputContentType == null) { 550 mInputContentType = new InputContentType(); 551 } 552 } 553 554 void createInputMethodStateIfNeeded() { 555 if (mInputMethodState == null) { 556 mInputMethodState = new InputMethodState(); 557 } 558 } 559 560 boolean isCursorVisible() { 561 // The default value is true, even when there is no associated Editor 562 return mCursorVisible && mTextView.isTextEditable(); 563 } 564 565 void prepareCursorControllers() { 566 boolean windowSupportsHandles = false; 567 568 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 569 if (params instanceof WindowManager.LayoutParams) { 570 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 571 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 572 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 573 } 574 575 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 576 mInsertionControllerEnabled = enabled && isCursorVisible(); 577 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 578 579 if (!mInsertionControllerEnabled) { 580 hideInsertionPointCursorController(); 581 if (mInsertionPointCursorController != null) { 582 mInsertionPointCursorController.onDetached(); 583 mInsertionPointCursorController = null; 584 } 585 } 586 587 if (!mSelectionControllerEnabled) { 588 stopSelectionActionMode(); 589 if (mSelectionModifierCursorController != null) { 590 mSelectionModifierCursorController.onDetached(); 591 mSelectionModifierCursorController = null; 592 } 593 } 594 } 595 596 void hideInsertionPointCursorController() { 597 if (mInsertionPointCursorController != null) { 598 mInsertionPointCursorController.hide(); 599 } 600 } 601 602 /** 603 * Hides the insertion controller and stops text selection mode, hiding the selection controller 604 */ 605 void hideControllers() { 606 hideCursorControllers(); 607 hideSpanControllers(); 608 } 609 610 private void hideSpanControllers() { 611 if (mSpanController != null) { 612 mSpanController.hide(); 613 } 614 } 615 616 private void hideCursorControllers() { 617 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 618 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 619 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 620 // to distinguish one from the other. 621 if (mSuggestionsPopupWindow != null && ((mTextView instanceof ExtractEditText) || 622 !mSuggestionsPopupWindow.isShowingUp())) { 623 // Should be done before hide insertion point controller since it triggers a show of it 624 mSuggestionsPopupWindow.hide(); 625 } 626 hideInsertionPointCursorController(); 627 stopSelectionActionMode(); 628 } 629 630 /** 631 * Create new SpellCheckSpans on the modified region. 632 */ 633 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 634 // Remove spans whose adjacent characters are text not punctuation 635 mTextView.removeAdjacentSuggestionSpans(start); 636 mTextView.removeAdjacentSuggestionSpans(end); 637 638 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 639 !(mTextView instanceof ExtractEditText)) { 640 if (mSpellChecker == null && createSpellChecker) { 641 mSpellChecker = new SpellChecker(mTextView); 642 } 643 if (mSpellChecker != null) { 644 mSpellChecker.spellCheck(start, end); 645 } 646 } 647 } 648 649 void onScreenStateChanged(int screenState) { 650 switch (screenState) { 651 case View.SCREEN_STATE_ON: 652 resumeBlink(); 653 break; 654 case View.SCREEN_STATE_OFF: 655 suspendBlink(); 656 break; 657 } 658 } 659 660 private void suspendBlink() { 661 if (mBlink != null) { 662 mBlink.cancel(); 663 } 664 } 665 666 private void resumeBlink() { 667 if (mBlink != null) { 668 mBlink.uncancel(); 669 makeBlink(); 670 } 671 } 672 673 void adjustInputType(boolean password, boolean passwordInputType, 674 boolean webPasswordInputType, boolean numberPasswordInputType) { 675 // mInputType has been set from inputType, possibly modified by mInputMethod. 676 // Specialize mInputType to [web]password if we have a text class and the original input 677 // type was a password. 678 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 679 if (password || passwordInputType) { 680 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 681 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 682 } 683 if (webPasswordInputType) { 684 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 685 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 686 } 687 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 688 if (numberPasswordInputType) { 689 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 690 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 691 } 692 } 693 } 694 695 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 696 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 697 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 698 699 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 700 com.android.internal.R.dimen.textview_error_popup_default_width); 701 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 702 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 703 float max = 0; 704 for (int i = 0; i < l.getLineCount(); i++) { 705 max = Math.max(max, l.getLineWidth(i)); 706 } 707 708 /* 709 * Now set the popup size to be big enough for the text plus the border capped 710 * to DEFAULT_MAX_POPUP_WIDTH 711 */ 712 pop.setWidth(wid + (int) Math.ceil(max)); 713 pop.setHeight(ht + l.getHeight()); 714 } 715 716 void setFrame() { 717 if (mErrorPopup != null) { 718 TextView tv = (TextView) mErrorPopup.getContentView(); 719 chooseSize(mErrorPopup, mError, tv); 720 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 721 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 722 } 723 } 724 725 private int getWordStart(int offset) { 726 // FIXME - For this and similar methods we're not doing anything to check if there's 727 // a LocaleSpan in the text, this may be something we should try handling or checking for. 728 int retOffset = getWordIteratorWithText().prevBoundary(offset); 729 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 730 // On punctuation boundary or within group of punctuation, find punctuation start. 731 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 732 } else { 733 // Not on a punctuation boundary, find the word start. 734 retOffset = getWordIteratorWithText().getBeginning(offset); 735 } 736 if (retOffset == BreakIterator.DONE) { 737 return offset; 738 } 739 return retOffset; 740 } 741 742 private int getWordEnd(int offset) { 743 int retOffset = getWordIteratorWithText().nextBoundary(offset); 744 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 745 // On punctuation boundary or within group of punctuation, find punctuation end. 746 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 747 } else { 748 // Not on a punctuation boundary, find the word end. 749 retOffset = getWordIteratorWithText().getEnd(offset); 750 } 751 if (retOffset == BreakIterator.DONE) { 752 return offset; 753 } 754 return retOffset; 755 } 756 757 /** 758 * Adjusts selection to the word under last touch offset. Return true if the operation was 759 * successfully performed. 760 */ 761 private boolean selectCurrentWord() { 762 if (!mTextView.canSelectText()) { 763 return false; 764 } 765 766 if (mTextView.hasPasswordTransformationMethod()) { 767 // Always select all on a password field. 768 // Cut/copy menu entries are not available for passwords, but being able to select all 769 // is however useful to delete or paste to replace the entire content. 770 return mTextView.selectAllText(); 771 } 772 773 int inputType = mTextView.getInputType(); 774 int klass = inputType & InputType.TYPE_MASK_CLASS; 775 int variation = inputType & InputType.TYPE_MASK_VARIATION; 776 777 // Specific text field types: select the entire text for these 778 if (klass == InputType.TYPE_CLASS_NUMBER || 779 klass == InputType.TYPE_CLASS_PHONE || 780 klass == InputType.TYPE_CLASS_DATETIME || 781 variation == InputType.TYPE_TEXT_VARIATION_URI || 782 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 783 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 784 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 785 return mTextView.selectAllText(); 786 } 787 788 long lastTouchOffsets = getLastTouchOffsets(); 789 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 790 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 791 792 // Safety check in case standard touch event handling has been bypassed 793 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 794 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 795 796 int selectionStart, selectionEnd; 797 798 // If a URLSpan (web address, email, phone...) is found at that position, select it. 799 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 800 getSpans(minOffset, maxOffset, URLSpan.class); 801 if (urlSpans.length >= 1) { 802 URLSpan urlSpan = urlSpans[0]; 803 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 804 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 805 } else { 806 // FIXME - We should check if there's a LocaleSpan in the text, this may be 807 // something we should try handling or checking for. 808 final WordIterator wordIterator = getWordIterator(); 809 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 810 811 selectionStart = wordIterator.getBeginning(minOffset); 812 selectionEnd = wordIterator.getEnd(maxOffset); 813 814 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 815 selectionStart == selectionEnd) { 816 // Possible when the word iterator does not properly handle the text's language 817 long range = getCharClusterRange(minOffset); 818 selectionStart = TextUtils.unpackRangeStartFromLong(range); 819 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 820 } 821 } 822 823 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 824 return selectionEnd > selectionStart; 825 } 826 827 void onLocaleChanged() { 828 // Will be re-created on demand in getWordIterator with the proper new locale 829 mWordIterator = null; 830 mWordIteratorWithText = null; 831 } 832 833 /** 834 * @hide 835 */ 836 public WordIterator getWordIterator() { 837 if (mWordIterator == null) { 838 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 839 } 840 return mWordIterator; 841 } 842 843 private WordIterator getWordIteratorWithText() { 844 if (mWordIteratorWithText == null) { 845 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 846 mUpdateWordIteratorText = true; 847 } 848 if (mUpdateWordIteratorText) { 849 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 850 // to the user's selection is needed. A possible solution would be to 851 // copy some number N of characters near the selection and then when the 852 // user approaches N then we'd do another copy of the next N characters. 853 CharSequence text = mTextView.getText(); 854 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 855 mUpdateWordIteratorText = false; 856 } 857 return mWordIteratorWithText; 858 } 859 860 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 861 final Layout layout = mTextView.getLayout(); 862 if (layout == null) return offset; 863 final CharSequence text = mTextView.getText(); 864 final int nextOffset = layout.getPaint().getTextRunCursor(text, 0, text.length(), 865 layout.isRtlCharAt(offset) ? Paint.DIRECTION_RTL : Paint.DIRECTION_LTR, 866 offset, findAfterGivenOffset ? Paint.CURSOR_AFTER : Paint.CURSOR_BEFORE); 867 return nextOffset == -1 ? offset : nextOffset; 868 } 869 870 private long getCharClusterRange(int offset) { 871 final int textLength = mTextView.getText().length(); 872 if (offset < textLength) { 873 return TextUtils.packRangeInLong(offset, getNextCursorOffset(offset, true)); 874 } 875 if (offset - 1 >= 0) { 876 return TextUtils.packRangeInLong(getNextCursorOffset(offset, false), offset); 877 } 878 return TextUtils.packRangeInLong(offset, offset); 879 } 880 881 private boolean touchPositionIsInSelection() { 882 int selectionStart = mTextView.getSelectionStart(); 883 int selectionEnd = mTextView.getSelectionEnd(); 884 885 if (selectionStart == selectionEnd) { 886 return false; 887 } 888 889 if (selectionStart > selectionEnd) { 890 int tmp = selectionStart; 891 selectionStart = selectionEnd; 892 selectionEnd = tmp; 893 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 894 } 895 896 SelectionModifierCursorController selectionController = getSelectionController(); 897 int minOffset = selectionController.getMinTouchOffset(); 898 int maxOffset = selectionController.getMaxTouchOffset(); 899 900 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 901 } 902 903 private PositionListener getPositionListener() { 904 if (mPositionListener == null) { 905 mPositionListener = new PositionListener(); 906 } 907 return mPositionListener; 908 } 909 910 private interface TextViewPositionListener { 911 public void updatePosition(int parentPositionX, int parentPositionY, 912 boolean parentPositionChanged, boolean parentScrolled); 913 } 914 915 private boolean isPositionVisible(final float positionX, final float positionY) { 916 synchronized (TEMP_POSITION) { 917 final float[] position = TEMP_POSITION; 918 position[0] = positionX; 919 position[1] = positionY; 920 View view = mTextView; 921 922 while (view != null) { 923 if (view != mTextView) { 924 // Local scroll is already taken into account in positionX/Y 925 position[0] -= view.getScrollX(); 926 position[1] -= view.getScrollY(); 927 } 928 929 if (position[0] < 0 || position[1] < 0 || 930 position[0] > view.getWidth() || position[1] > view.getHeight()) { 931 return false; 932 } 933 934 if (!view.getMatrix().isIdentity()) { 935 view.getMatrix().mapPoints(position); 936 } 937 938 position[0] += view.getLeft(); 939 position[1] += view.getTop(); 940 941 final ViewParent parent = view.getParent(); 942 if (parent instanceof View) { 943 view = (View) parent; 944 } else { 945 // We've reached the ViewRoot, stop iterating 946 view = null; 947 } 948 } 949 } 950 951 // We've been able to walk up the view hierarchy and the position was never clipped 952 return true; 953 } 954 955 private boolean isOffsetVisible(int offset) { 956 Layout layout = mTextView.getLayout(); 957 if (layout == null) return false; 958 959 final int line = layout.getLineForOffset(offset); 960 final int lineBottom = layout.getLineBottom(line); 961 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 962 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 963 lineBottom + mTextView.viewportToContentVerticalOffset()); 964 } 965 966 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 967 * in the view. Returns false when the position is in the empty space of left/right of text. 968 */ 969 private boolean isPositionOnText(float x, float y) { 970 Layout layout = mTextView.getLayout(); 971 if (layout == null) return false; 972 973 final int line = mTextView.getLineAtCoordinate(y); 974 x = mTextView.convertToLocalHorizontalCoordinate(x); 975 976 if (x < layout.getLineLeft(line)) return false; 977 if (x > layout.getLineRight(line)) return false; 978 return true; 979 } 980 981 public boolean performLongClick(boolean handled) { 982 // Long press in empty space moves cursor and starts the selection action mode. 983 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 984 mInsertionControllerEnabled) { 985 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 986 mLastDownPositionY); 987 stopSelectionActionMode(); 988 Selection.setSelection((Spannable) mTextView.getText(), offset); 989 getInsertionController().show(); 990 startSelectionActionModeWithoutSelection(); 991 handled = true; 992 } 993 994 if (!handled && mSelectionActionMode != null) { 995 if (touchPositionIsInSelection()) { 996 // Start a drag 997 final int start = mTextView.getSelectionStart(); 998 final int end = mTextView.getSelectionEnd(); 999 CharSequence selectedText = mTextView.getTransformedText(start, end); 1000 ClipData data = ClipData.newPlainText(null, selectedText); 1001 DragLocalState localState = new DragLocalState(mTextView, start, end); 1002 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 1003 View.DRAG_FLAG_GLOBAL); 1004 stopSelectionActionMode(); 1005 } else { 1006 stopSelectionActionMode(); 1007 startSelectionActionModeWithSelectionAndStartDrag(); 1008 } 1009 handled = true; 1010 } 1011 1012 // Start a new selection 1013 if (!handled) { 1014 handled = startSelectionActionModeWithSelectionAndStartDrag(); 1015 } 1016 1017 return handled; 1018 } 1019 1020 private long getLastTouchOffsets() { 1021 SelectionModifierCursorController selectionController = getSelectionController(); 1022 final int minOffset = selectionController.getMinTouchOffset(); 1023 final int maxOffset = selectionController.getMaxTouchOffset(); 1024 return TextUtils.packRangeInLong(minOffset, maxOffset); 1025 } 1026 1027 void onFocusChanged(boolean focused, int direction) { 1028 mShowCursor = SystemClock.uptimeMillis(); 1029 ensureEndedBatchEdit(); 1030 1031 if (focused) { 1032 int selStart = mTextView.getSelectionStart(); 1033 int selEnd = mTextView.getSelectionEnd(); 1034 1035 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1036 // mode for these, unless there was a specific selection already started. 1037 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1038 selEnd == mTextView.getText().length(); 1039 1040 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1041 !isFocusHighlighted; 1042 1043 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1044 // If a tap was used to give focus to that view, move cursor at tap position. 1045 // Has to be done before onTakeFocus, which can be overloaded. 1046 final int lastTapPosition = getLastTapPosition(); 1047 if (lastTapPosition >= 0) { 1048 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1049 } 1050 1051 // Note this may have to be moved out of the Editor class 1052 MovementMethod mMovement = mTextView.getMovementMethod(); 1053 if (mMovement != null) { 1054 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1055 } 1056 1057 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1058 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1059 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1060 // This special case ensure that we keep current selection in that case. 1061 // It would be better to know why the DecorView does not have focus at that time. 1062 if (((mTextView instanceof ExtractEditText) || mSelectionMoved) && 1063 selStart >= 0 && selEnd >= 0) { 1064 /* 1065 * Someone intentionally set the selection, so let them 1066 * do whatever it is that they wanted to do instead of 1067 * the default on-focus behavior. We reset the selection 1068 * here instead of just skipping the onTakeFocus() call 1069 * because some movement methods do something other than 1070 * just setting the selection in theirs and we still 1071 * need to go through that path. 1072 */ 1073 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1074 } 1075 1076 if (mSelectAllOnFocus) { 1077 mTextView.selectAllText(); 1078 } 1079 1080 mTouchFocusSelected = true; 1081 } 1082 1083 mFrozenWithFocus = false; 1084 mSelectionMoved = false; 1085 1086 if (mError != null) { 1087 showError(); 1088 } 1089 1090 makeBlink(); 1091 } else { 1092 if (mError != null) { 1093 hideError(); 1094 } 1095 // Don't leave us in the middle of a batch edit. 1096 mTextView.onEndBatchEdit(); 1097 1098 if (mTextView instanceof ExtractEditText) { 1099 // terminateTextSelectionMode removes selection, which we want to keep when 1100 // ExtractEditText goes out of focus. 1101 final int selStart = mTextView.getSelectionStart(); 1102 final int selEnd = mTextView.getSelectionEnd(); 1103 hideControllers(); 1104 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1105 } else { 1106 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1107 hideControllers(); 1108 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1109 downgradeEasyCorrectionSpans(); 1110 } 1111 1112 // No need to create the controller 1113 if (mSelectionModifierCursorController != null) { 1114 mSelectionModifierCursorController.resetTouchOffsets(); 1115 } 1116 } 1117 } 1118 1119 /** 1120 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1121 * span. 1122 */ 1123 private void downgradeEasyCorrectionSpans() { 1124 CharSequence text = mTextView.getText(); 1125 if (text instanceof Spannable) { 1126 Spannable spannable = (Spannable) text; 1127 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1128 spannable.length(), SuggestionSpan.class); 1129 for (int i = 0; i < suggestionSpans.length; i++) { 1130 int flags = suggestionSpans[i].getFlags(); 1131 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1132 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1133 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1134 suggestionSpans[i].setFlags(flags); 1135 } 1136 } 1137 } 1138 } 1139 1140 void sendOnTextChanged(int start, int after) { 1141 updateSpellCheckSpans(start, start + after, false); 1142 1143 // Flip flag to indicate the word iterator needs to have the text reset. 1144 mUpdateWordIteratorText = true; 1145 1146 // Hide the controllers as soon as text is modified (typing, procedural...) 1147 // We do not hide the span controllers, since they can be added when a new text is 1148 // inserted into the text view (voice IME). 1149 hideCursorControllers(); 1150 } 1151 1152 private int getLastTapPosition() { 1153 // No need to create the controller at that point, no last tap position saved 1154 if (mSelectionModifierCursorController != null) { 1155 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1156 if (lastTapPosition >= 0) { 1157 // Safety check, should not be possible. 1158 if (lastTapPosition > mTextView.getText().length()) { 1159 lastTapPosition = mTextView.getText().length(); 1160 } 1161 return lastTapPosition; 1162 } 1163 } 1164 1165 return -1; 1166 } 1167 1168 void onWindowFocusChanged(boolean hasWindowFocus) { 1169 if (hasWindowFocus) { 1170 if (mBlink != null) { 1171 mBlink.uncancel(); 1172 makeBlink(); 1173 } 1174 } else { 1175 if (mBlink != null) { 1176 mBlink.cancel(); 1177 } 1178 if (mInputContentType != null) { 1179 mInputContentType.enterDown = false; 1180 } 1181 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1182 hideControllers(); 1183 if (mSuggestionsPopupWindow != null) { 1184 mSuggestionsPopupWindow.onParentLostFocus(); 1185 } 1186 1187 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1188 ensureEndedBatchEdit(); 1189 } 1190 } 1191 1192 void onTouchEvent(MotionEvent event) { 1193 updateFloatingToolbarVisibility(event); 1194 1195 if (hasSelectionController()) { 1196 getSelectionController().onTouchEvent(event); 1197 } 1198 1199 if (mShowSuggestionRunnable != null) { 1200 mTextView.removeCallbacks(mShowSuggestionRunnable); 1201 mShowSuggestionRunnable = null; 1202 } 1203 1204 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1205 mLastDownPositionX = event.getX(); 1206 mLastDownPositionY = event.getY(); 1207 1208 // Reset this state; it will be re-set if super.onTouchEvent 1209 // causes focus to move to the view. 1210 mTouchFocusSelected = false; 1211 mIgnoreActionUpEvent = false; 1212 } 1213 } 1214 1215 private void updateFloatingToolbarVisibility(MotionEvent event) { 1216 if (mSelectionActionMode != null) { 1217 switch (event.getActionMasked()) { 1218 case MotionEvent.ACTION_MOVE: 1219 hideFloatingToolbar(); 1220 break; 1221 case MotionEvent.ACTION_UP: // fall through 1222 case MotionEvent.ACTION_CANCEL: 1223 showFloatingToolbar(); 1224 } 1225 } 1226 } 1227 1228 private void hideFloatingToolbar() { 1229 if (mSelectionActionMode != null) { 1230 mTextView.removeCallbacks(mShowFloatingToolbar); 1231 // Delay the "hide" a little bit just in case a "show" will happen almost immediately. 1232 mTextView.postDelayed(mHideFloatingToolbar, 100); 1233 } 1234 } 1235 1236 private void showFloatingToolbar() { 1237 if (mSelectionActionMode != null) { 1238 mTextView.removeCallbacks(mHideFloatingToolbar); 1239 // Delay "show" so it doesn't interfere with click confirmations 1240 // or double-clicks that could "dismiss" the floating toolbar. 1241 int delay = ViewConfiguration.getDoubleTapTimeout(); 1242 mTextView.postDelayed(mShowFloatingToolbar, delay); 1243 } 1244 } 1245 1246 public void beginBatchEdit() { 1247 mInBatchEditControllers = true; 1248 final InputMethodState ims = mInputMethodState; 1249 if (ims != null) { 1250 int nesting = ++ims.mBatchEditNesting; 1251 if (nesting == 1) { 1252 ims.mCursorChanged = false; 1253 ims.mChangedDelta = 0; 1254 if (ims.mContentChanged) { 1255 // We already have a pending change from somewhere else, 1256 // so turn this into a full update. 1257 ims.mChangedStart = 0; 1258 ims.mChangedEnd = mTextView.getText().length(); 1259 } else { 1260 ims.mChangedStart = EXTRACT_UNKNOWN; 1261 ims.mChangedEnd = EXTRACT_UNKNOWN; 1262 ims.mContentChanged = false; 1263 } 1264 mUndoInputFilter.beginBatchEdit(); 1265 mTextView.onBeginBatchEdit(); 1266 } 1267 } 1268 } 1269 1270 public void endBatchEdit() { 1271 mInBatchEditControllers = false; 1272 final InputMethodState ims = mInputMethodState; 1273 if (ims != null) { 1274 int nesting = --ims.mBatchEditNesting; 1275 if (nesting == 0) { 1276 finishBatchEdit(ims); 1277 } 1278 } 1279 } 1280 1281 void ensureEndedBatchEdit() { 1282 final InputMethodState ims = mInputMethodState; 1283 if (ims != null && ims.mBatchEditNesting != 0) { 1284 ims.mBatchEditNesting = 0; 1285 finishBatchEdit(ims); 1286 } 1287 } 1288 1289 void finishBatchEdit(final InputMethodState ims) { 1290 mTextView.onEndBatchEdit(); 1291 mUndoInputFilter.endBatchEdit(); 1292 1293 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1294 mTextView.updateAfterEdit(); 1295 reportExtractedText(); 1296 } else if (ims.mCursorChanged) { 1297 // Cheesy way to get us to report the current cursor location. 1298 mTextView.invalidateCursor(); 1299 } 1300 // sendUpdateSelection knows to avoid sending if the selection did 1301 // not actually change. 1302 sendUpdateSelection(); 1303 } 1304 1305 static final int EXTRACT_NOTHING = -2; 1306 static final int EXTRACT_UNKNOWN = -1; 1307 1308 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1309 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1310 EXTRACT_UNKNOWN, outText); 1311 } 1312 1313 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1314 int partialStartOffset, int partialEndOffset, int delta, 1315 @Nullable ExtractedText outText) { 1316 if (request == null || outText == null) { 1317 return false; 1318 } 1319 1320 final CharSequence content = mTextView.getText(); 1321 if (content == null) { 1322 return false; 1323 } 1324 1325 if (partialStartOffset != EXTRACT_NOTHING) { 1326 final int N = content.length(); 1327 if (partialStartOffset < 0) { 1328 outText.partialStartOffset = outText.partialEndOffset = -1; 1329 partialStartOffset = 0; 1330 partialEndOffset = N; 1331 } else { 1332 // Now use the delta to determine the actual amount of text 1333 // we need. 1334 partialEndOffset += delta; 1335 // Adjust offsets to ensure we contain full spans. 1336 if (content instanceof Spanned) { 1337 Spanned spanned = (Spanned)content; 1338 Object[] spans = spanned.getSpans(partialStartOffset, 1339 partialEndOffset, ParcelableSpan.class); 1340 int i = spans.length; 1341 while (i > 0) { 1342 i--; 1343 int j = spanned.getSpanStart(spans[i]); 1344 if (j < partialStartOffset) partialStartOffset = j; 1345 j = spanned.getSpanEnd(spans[i]); 1346 if (j > partialEndOffset) partialEndOffset = j; 1347 } 1348 } 1349 outText.partialStartOffset = partialStartOffset; 1350 outText.partialEndOffset = partialEndOffset - delta; 1351 1352 if (partialStartOffset > N) { 1353 partialStartOffset = N; 1354 } else if (partialStartOffset < 0) { 1355 partialStartOffset = 0; 1356 } 1357 if (partialEndOffset > N) { 1358 partialEndOffset = N; 1359 } else if (partialEndOffset < 0) { 1360 partialEndOffset = 0; 1361 } 1362 } 1363 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1364 outText.text = content.subSequence(partialStartOffset, 1365 partialEndOffset); 1366 } else { 1367 outText.text = TextUtils.substring(content, partialStartOffset, 1368 partialEndOffset); 1369 } 1370 } else { 1371 outText.partialStartOffset = 0; 1372 outText.partialEndOffset = 0; 1373 outText.text = ""; 1374 } 1375 outText.flags = 0; 1376 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1377 outText.flags |= ExtractedText.FLAG_SELECTING; 1378 } 1379 if (mTextView.isSingleLine()) { 1380 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1381 } 1382 outText.startOffset = 0; 1383 outText.selectionStart = mTextView.getSelectionStart(); 1384 outText.selectionEnd = mTextView.getSelectionEnd(); 1385 return true; 1386 } 1387 1388 boolean reportExtractedText() { 1389 final Editor.InputMethodState ims = mInputMethodState; 1390 if (ims != null) { 1391 final boolean contentChanged = ims.mContentChanged; 1392 if (contentChanged || ims.mSelectionModeChanged) { 1393 ims.mContentChanged = false; 1394 ims.mSelectionModeChanged = false; 1395 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1396 if (req != null) { 1397 InputMethodManager imm = InputMethodManager.peekInstance(); 1398 if (imm != null) { 1399 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1400 "Retrieving extracted start=" + ims.mChangedStart + 1401 " end=" + ims.mChangedEnd + 1402 " delta=" + ims.mChangedDelta); 1403 if (ims.mChangedStart < 0 && !contentChanged) { 1404 ims.mChangedStart = EXTRACT_NOTHING; 1405 } 1406 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1407 ims.mChangedDelta, ims.mExtractedText)) { 1408 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1409 "Reporting extracted start=" + 1410 ims.mExtractedText.partialStartOffset + 1411 " end=" + ims.mExtractedText.partialEndOffset + 1412 ": " + ims.mExtractedText.text); 1413 1414 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1415 ims.mChangedStart = EXTRACT_UNKNOWN; 1416 ims.mChangedEnd = EXTRACT_UNKNOWN; 1417 ims.mChangedDelta = 0; 1418 ims.mContentChanged = false; 1419 return true; 1420 } 1421 } 1422 } 1423 } 1424 } 1425 return false; 1426 } 1427 1428 private void sendUpdateSelection() { 1429 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1430 final InputMethodManager imm = InputMethodManager.peekInstance(); 1431 if (null != imm) { 1432 final int selectionStart = mTextView.getSelectionStart(); 1433 final int selectionEnd = mTextView.getSelectionEnd(); 1434 int candStart = -1; 1435 int candEnd = -1; 1436 if (mTextView.getText() instanceof Spannable) { 1437 final Spannable sp = (Spannable) mTextView.getText(); 1438 candStart = EditableInputConnection.getComposingSpanStart(sp); 1439 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1440 } 1441 // InputMethodManager#updateSelection skips sending the message if 1442 // none of the parameters have changed since the last time we called it. 1443 imm.updateSelection(mTextView, 1444 selectionStart, selectionEnd, candStart, candEnd); 1445 } 1446 } 1447 } 1448 1449 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1450 int cursorOffsetVertical) { 1451 final int selectionStart = mTextView.getSelectionStart(); 1452 final int selectionEnd = mTextView.getSelectionEnd(); 1453 1454 final InputMethodState ims = mInputMethodState; 1455 if (ims != null && ims.mBatchEditNesting == 0) { 1456 InputMethodManager imm = InputMethodManager.peekInstance(); 1457 if (imm != null) { 1458 if (imm.isActive(mTextView)) { 1459 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1460 // We are in extract mode and the content has changed 1461 // in some way... just report complete new text to the 1462 // input method. 1463 reportExtractedText(); 1464 } 1465 } 1466 } 1467 } 1468 1469 if (mCorrectionHighlighter != null) { 1470 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1471 } 1472 1473 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1474 drawCursor(canvas, cursorOffsetVertical); 1475 // Rely on the drawable entirely, do not draw the cursor line. 1476 // Has to be done after the IMM related code above which relies on the highlight. 1477 highlight = null; 1478 } 1479 1480 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1481 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1482 cursorOffsetVertical); 1483 } else { 1484 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1485 } 1486 } 1487 1488 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1489 Paint highlightPaint, int cursorOffsetVertical) { 1490 final long lineRange = layout.getLineRangeForDraw(canvas); 1491 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1492 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1493 if (lastLine < 0) return; 1494 1495 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1496 firstLine, lastLine); 1497 1498 if (layout instanceof DynamicLayout) { 1499 if (mTextRenderNodes == null) { 1500 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1501 } 1502 1503 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1504 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1505 int[] blockIndices = dynamicLayout.getBlockIndices(); 1506 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1507 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1508 1509 int endOfPreviousBlock = -1; 1510 int searchStartIndex = 0; 1511 for (int i = 0; i < numberOfBlocks; i++) { 1512 int blockEndLine = blockEndLines[i]; 1513 int blockIndex = blockIndices[i]; 1514 1515 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1516 if (blockIsInvalid) { 1517 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1518 searchStartIndex); 1519 // Note how dynamic layout's internal block indices get updated from Editor 1520 blockIndices[i] = blockIndex; 1521 if (mTextRenderNodes[blockIndex] != null) { 1522 mTextRenderNodes[blockIndex].isDirty = true; 1523 } 1524 searchStartIndex = blockIndex + 1; 1525 } 1526 1527 if (mTextRenderNodes[blockIndex] == null) { 1528 mTextRenderNodes[blockIndex] = 1529 new TextRenderNode("Text " + blockIndex); 1530 } 1531 1532 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1533 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1534 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1535 final int blockBeginLine = endOfPreviousBlock + 1; 1536 final int top = layout.getLineTop(blockBeginLine); 1537 final int bottom = layout.getLineBottom(blockEndLine); 1538 int left = 0; 1539 int right = mTextView.getWidth(); 1540 if (mTextView.getHorizontallyScrolling()) { 1541 float min = Float.MAX_VALUE; 1542 float max = Float.MIN_VALUE; 1543 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1544 min = Math.min(min, layout.getLineLeft(line)); 1545 max = Math.max(max, layout.getLineRight(line)); 1546 } 1547 left = (int) min; 1548 right = (int) (max + 0.5f); 1549 } 1550 1551 // Rebuild display list if it is invalid 1552 if (blockDisplayListIsInvalid) { 1553 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1554 right - left, bottom - top); 1555 try { 1556 // drawText is always relative to TextView's origin, this translation 1557 // brings this range of text back to the top left corner of the viewport 1558 displayListCanvas.translate(-left, -top); 1559 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1560 mTextRenderNodes[blockIndex].isDirty = false; 1561 // No need to untranslate, previous context is popped after 1562 // drawDisplayList 1563 } finally { 1564 blockDisplayList.end(displayListCanvas); 1565 // Same as drawDisplayList below, handled by our TextView's parent 1566 blockDisplayList.setClipToBounds(false); 1567 } 1568 } 1569 1570 // Valid disply list whose index is >= indexFirstChangedBlock 1571 // only needs to update its drawing location. 1572 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1573 } 1574 1575 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1576 1577 endOfPreviousBlock = blockEndLine; 1578 } 1579 1580 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1581 } else { 1582 // Boring layout is used for empty and hint text 1583 layout.drawText(canvas, firstLine, lastLine); 1584 } 1585 } 1586 1587 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1588 int searchStartIndex) { 1589 int length = mTextRenderNodes.length; 1590 for (int i = searchStartIndex; i < length; i++) { 1591 boolean blockIndexFound = false; 1592 for (int j = 0; j < numberOfBlocks; j++) { 1593 if (blockIndices[j] == i) { 1594 blockIndexFound = true; 1595 break; 1596 } 1597 } 1598 if (blockIndexFound) continue; 1599 return i; 1600 } 1601 1602 // No available index found, the pool has to grow 1603 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1604 return length; 1605 } 1606 1607 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1608 final boolean translate = cursorOffsetVertical != 0; 1609 if (translate) canvas.translate(0, cursorOffsetVertical); 1610 for (int i = 0; i < mCursorCount; i++) { 1611 mCursorDrawable[i].draw(canvas); 1612 } 1613 if (translate) canvas.translate(0, -cursorOffsetVertical); 1614 } 1615 1616 /** 1617 * Invalidates all the sub-display lists that overlap the specified character range 1618 */ 1619 void invalidateTextDisplayList(Layout layout, int start, int end) { 1620 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1621 final int firstLine = layout.getLineForOffset(start); 1622 final int lastLine = layout.getLineForOffset(end); 1623 1624 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1625 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1626 int[] blockIndices = dynamicLayout.getBlockIndices(); 1627 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1628 1629 int i = 0; 1630 // Skip the blocks before firstLine 1631 while (i < numberOfBlocks) { 1632 if (blockEndLines[i] >= firstLine) break; 1633 i++; 1634 } 1635 1636 // Invalidate all subsequent blocks until lastLine is passed 1637 while (i < numberOfBlocks) { 1638 final int blockIndex = blockIndices[i]; 1639 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1640 mTextRenderNodes[blockIndex].isDirty = true; 1641 } 1642 if (blockEndLines[i] >= lastLine) break; 1643 i++; 1644 } 1645 } 1646 } 1647 1648 void invalidateTextDisplayList() { 1649 if (mTextRenderNodes != null) { 1650 for (int i = 0; i < mTextRenderNodes.length; i++) { 1651 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1652 } 1653 } 1654 } 1655 1656 void updateCursorsPositions() { 1657 if (mTextView.mCursorDrawableRes == 0) { 1658 mCursorCount = 0; 1659 return; 1660 } 1661 1662 Layout layout = mTextView.getLayout(); 1663 Layout hintLayout = mTextView.getHintLayout(); 1664 final int offset = mTextView.getSelectionStart(); 1665 final int line = layout.getLineForOffset(offset); 1666 final int top = layout.getLineTop(line); 1667 final int bottom = layout.getLineTop(line + 1); 1668 1669 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1670 1671 int middle = bottom; 1672 if (mCursorCount == 2) { 1673 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1674 middle = (top + bottom) >> 1; 1675 } 1676 1677 boolean clamped = layout.shouldClampCursor(line); 1678 updateCursorPosition(0, top, middle, 1679 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1680 1681 if (mCursorCount == 2) { 1682 updateCursorPosition(1, middle, bottom, 1683 layout.getSecondaryHorizontal(offset, clamped)); 1684 } 1685 } 1686 1687 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1688 boolean clamped) { 1689 if (TextUtils.isEmpty(layout.getText()) && 1690 hintLayout != null && 1691 !TextUtils.isEmpty(hintLayout.getText())) { 1692 return hintLayout.getPrimaryHorizontal(offset, clamped); 1693 } else { 1694 return layout.getPrimaryHorizontal(offset, clamped); 1695 } 1696 } 1697 1698 /** 1699 * @return true if the selection mode was actually started. 1700 */ 1701 private boolean startSelectionActionModeWithoutSelection() { 1702 if (extractedTextModeWillBeStarted()) { 1703 // Cancel the single tap delayed runnable. 1704 if (mSelectionModeWithoutSelectionRunnable != null) { 1705 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 1706 } 1707 1708 return false; 1709 } 1710 1711 if (mSelectionActionMode != null) { 1712 // Selection action mode is already started 1713 // TODO: revisit invocations to minimize this case. 1714 mSelectionActionMode.invalidate(); 1715 return false; 1716 } 1717 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1718 mSelectionActionMode = mTextView.startActionMode( 1719 actionModeCallback, ActionMode.TYPE_FLOATING); 1720 return mSelectionActionMode != null; 1721 } 1722 1723 /** 1724 * Starts a Selection Action Mode with the current selection and enters drag mode. This should 1725 * be used whenever the mode is started from a touch event. 1726 * 1727 * @return true if the selection mode was actually started. 1728 */ 1729 private boolean startSelectionActionModeWithSelectionAndStartDrag() { 1730 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1731 if (selectionStarted) { 1732 getSelectionController().enterDrag(); 1733 } 1734 return selectionStarted; 1735 } 1736 1737 /** 1738 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1739 * are shown. This should be used when the mode is started from a non-touch event. 1740 * 1741 * @return true if the selection mode was actually started. 1742 */ 1743 boolean startSelectionActionModeWithSelection() { 1744 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1745 if (selectionStarted) { 1746 getSelectionController().show(); 1747 } 1748 return selectionStarted; 1749 } 1750 1751 private boolean startSelectionActionModeWithSelectionInternal() { 1752 if (extractedTextModeWillBeStarted()) { 1753 // Cancel the single tap delayed runnable. 1754 if (mSelectionModeWithoutSelectionRunnable != null) { 1755 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 1756 } 1757 1758 return false; 1759 } 1760 1761 if (mSelectionActionMode != null) { 1762 // Selection action mode is already started 1763 mSelectionActionMode.invalidate(); 1764 return false; 1765 } 1766 1767 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1768 Log.w(TextView.LOG_TAG, 1769 "TextView does not support text selection. Action mode cancelled."); 1770 return false; 1771 } 1772 1773 if (!mTextView.hasSelection()) { 1774 // There may already be a selection on device rotation 1775 if (!selectCurrentWord()) { 1776 // No word found under cursor or text selection not permitted. 1777 return false; 1778 } 1779 } 1780 1781 boolean willExtract = extractedTextModeWillBeStarted(); 1782 1783 // Do not start the action mode when extracted text will show up full screen, which would 1784 // immediately hide the newly created action bar and would be visually distracting. 1785 if (!willExtract) { 1786 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1787 mSelectionActionMode = mTextView.startActionMode( 1788 actionModeCallback, ActionMode.TYPE_FLOATING); 1789 } 1790 1791 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1792 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1793 // Show the IME to be able to replace text, except when selecting non editable text. 1794 final InputMethodManager imm = InputMethodManager.peekInstance(); 1795 if (imm != null) { 1796 imm.showSoftInput(mTextView, 0, null); 1797 } 1798 } 1799 return selectionStarted; 1800 } 1801 1802 private boolean extractedTextModeWillBeStarted() { 1803 if (!(mTextView instanceof ExtractEditText)) { 1804 final InputMethodManager imm = InputMethodManager.peekInstance(); 1805 return imm != null && imm.isFullscreenMode(); 1806 } 1807 return false; 1808 } 1809 1810 /** 1811 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1812 * the current cursor position or selection range. This method is consistent with the 1813 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1814 */ 1815 private boolean shouldOfferToShowSuggestions() { 1816 CharSequence text = mTextView.getText(); 1817 if (!(text instanceof Spannable)) return false; 1818 1819 final Spannable spannable = (Spannable) text; 1820 final int selectionStart = mTextView.getSelectionStart(); 1821 final int selectionEnd = mTextView.getSelectionEnd(); 1822 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1823 SuggestionSpan.class); 1824 if (suggestionSpans.length == 0) { 1825 return false; 1826 } 1827 if (selectionStart == selectionEnd) { 1828 // Spans overlap the cursor. 1829 return true; 1830 } 1831 int minSpanStart = mTextView.getText().length(); 1832 int maxSpanEnd = 0; 1833 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1834 int unionOfSpansCoveringSelectionStartEnd = 0; 1835 for (int i = 0; i < suggestionSpans.length; i++) { 1836 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1837 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1838 minSpanStart = Math.min(minSpanStart, spanStart); 1839 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1840 if (selectionStart < spanStart || selectionStart > spanEnd) { 1841 // The span doesn't cover the current selection start point. 1842 continue; 1843 } 1844 unionOfSpansCoveringSelectionStartStart = 1845 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1846 unionOfSpansCoveringSelectionStartEnd = 1847 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1848 } 1849 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1850 // No spans cover the selection start point. 1851 return false; 1852 } 1853 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1854 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1855 // There is a span that is not covered by the union. In this case, we soouldn't offer 1856 // to show suggestions as it's confusing. 1857 return false; 1858 } 1859 return true; 1860 } 1861 1862 /** 1863 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1864 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1865 */ 1866 private boolean isCursorInsideEasyCorrectionSpan() { 1867 Spannable spannable = (Spannable) mTextView.getText(); 1868 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1869 mTextView.getSelectionEnd(), SuggestionSpan.class); 1870 for (int i = 0; i < suggestionSpans.length; i++) { 1871 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1872 return true; 1873 } 1874 } 1875 return false; 1876 } 1877 1878 void onTouchUpEvent(MotionEvent event) { 1879 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1880 hideControllers(); 1881 CharSequence text = mTextView.getText(); 1882 if (!selectAllGotFocus && text.length() > 0) { 1883 // Move cursor 1884 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1885 Selection.setSelection((Spannable) text, offset); 1886 if (mSpellChecker != null) { 1887 // When the cursor moves, the word that was typed may need spell check 1888 mSpellChecker.onSelectionChanged(); 1889 } 1890 1891 if (!extractedTextModeWillBeStarted()) { 1892 if (isCursorInsideEasyCorrectionSpan()) { 1893 mShowSuggestionRunnable = new Runnable() { 1894 public void run() { 1895 showSuggestions(); 1896 } 1897 }; 1898 // removeCallbacks is performed on every touch 1899 mTextView.postDelayed(mShowSuggestionRunnable, 1900 ViewConfiguration.getDoubleTapTimeout()); 1901 } else if (hasInsertionController()) { 1902 getInsertionController().show(); 1903 } 1904 } 1905 } 1906 } 1907 1908 protected void stopSelectionActionMode() { 1909 if (mSelectionActionMode != null) { 1910 // This will hide the mSelectionModifierCursorController 1911 mSelectionActionMode.finish(); 1912 } 1913 } 1914 1915 /** 1916 * @return True if this view supports insertion handles. 1917 */ 1918 boolean hasInsertionController() { 1919 return mInsertionControllerEnabled; 1920 } 1921 1922 /** 1923 * @return True if this view supports selection handles. 1924 */ 1925 boolean hasSelectionController() { 1926 return mSelectionControllerEnabled; 1927 } 1928 1929 InsertionPointCursorController getInsertionController() { 1930 if (!mInsertionControllerEnabled) { 1931 return null; 1932 } 1933 1934 if (mInsertionPointCursorController == null) { 1935 mInsertionPointCursorController = new InsertionPointCursorController(); 1936 1937 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1938 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1939 } 1940 1941 return mInsertionPointCursorController; 1942 } 1943 1944 SelectionModifierCursorController getSelectionController() { 1945 if (!mSelectionControllerEnabled) { 1946 return null; 1947 } 1948 1949 if (mSelectionModifierCursorController == null) { 1950 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1951 1952 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1953 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1954 } 1955 1956 return mSelectionModifierCursorController; 1957 } 1958 1959 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1960 if (mCursorDrawable[cursorIndex] == null) 1961 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1962 mTextView.mCursorDrawableRes); 1963 1964 if (mTempRect == null) mTempRect = new Rect(); 1965 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1966 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1967 horizontal = Math.max(0.5f, horizontal - 0.5f); 1968 final int left = (int) (horizontal) - mTempRect.left; 1969 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1970 bottom + mTempRect.bottom); 1971 } 1972 1973 /** 1974 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1975 * a dictionary) from the current input method, provided by it calling 1976 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1977 * implementation flashes the background of the corrected word to provide feedback to the user. 1978 * 1979 * @param info The auto correct info about the text that was corrected. 1980 */ 1981 public void onCommitCorrection(CorrectionInfo info) { 1982 if (mCorrectionHighlighter == null) { 1983 mCorrectionHighlighter = new CorrectionHighlighter(); 1984 } else { 1985 mCorrectionHighlighter.invalidate(false); 1986 } 1987 1988 mCorrectionHighlighter.highlight(info); 1989 } 1990 1991 void showSuggestions() { 1992 if (mSuggestionsPopupWindow == null) { 1993 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 1994 } 1995 hideControllers(); 1996 mSuggestionsPopupWindow.show(); 1997 } 1998 1999 void onScrollChanged() { 2000 if (mPositionListener != null) { 2001 mPositionListener.onScrollChanged(); 2002 } 2003 if (mSelectionActionMode != null) { 2004 mSelectionActionMode.invalidateContentRect(); 2005 } 2006 } 2007 2008 /** 2009 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2010 */ 2011 private boolean shouldBlink() { 2012 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2013 2014 final int start = mTextView.getSelectionStart(); 2015 if (start < 0) return false; 2016 2017 final int end = mTextView.getSelectionEnd(); 2018 if (end < 0) return false; 2019 2020 return start == end; 2021 } 2022 2023 void makeBlink() { 2024 if (shouldBlink()) { 2025 mShowCursor = SystemClock.uptimeMillis(); 2026 if (mBlink == null) mBlink = new Blink(); 2027 mBlink.removeCallbacks(mBlink); 2028 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 2029 } else { 2030 if (mBlink != null) mBlink.removeCallbacks(mBlink); 2031 } 2032 } 2033 2034 private class Blink extends Handler implements Runnable { 2035 private boolean mCancelled; 2036 2037 public void run() { 2038 if (mCancelled) { 2039 return; 2040 } 2041 2042 removeCallbacks(Blink.this); 2043 2044 if (shouldBlink()) { 2045 if (mTextView.getLayout() != null) { 2046 mTextView.invalidateCursorPath(); 2047 } 2048 2049 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 2050 } 2051 } 2052 2053 void cancel() { 2054 if (!mCancelled) { 2055 removeCallbacks(Blink.this); 2056 mCancelled = true; 2057 } 2058 } 2059 2060 void uncancel() { 2061 mCancelled = false; 2062 } 2063 } 2064 2065 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 2066 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2067 com.android.internal.R.layout.text_drag_thumbnail, null); 2068 2069 if (shadowView == null) { 2070 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2071 } 2072 2073 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2074 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2075 } 2076 shadowView.setText(text); 2077 shadowView.setTextColor(mTextView.getTextColors()); 2078 2079 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2080 shadowView.setGravity(Gravity.CENTER); 2081 2082 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2083 ViewGroup.LayoutParams.WRAP_CONTENT)); 2084 2085 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2086 shadowView.measure(size, size); 2087 2088 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2089 shadowView.invalidate(); 2090 return new DragShadowBuilder(shadowView); 2091 } 2092 2093 private static class DragLocalState { 2094 public TextView sourceTextView; 2095 public int start, end; 2096 2097 public DragLocalState(TextView sourceTextView, int start, int end) { 2098 this.sourceTextView = sourceTextView; 2099 this.start = start; 2100 this.end = end; 2101 } 2102 } 2103 2104 void onDrop(DragEvent event) { 2105 StringBuilder content = new StringBuilder(""); 2106 ClipData clipData = event.getClipData(); 2107 final int itemCount = clipData.getItemCount(); 2108 for (int i=0; i < itemCount; i++) { 2109 Item item = clipData.getItemAt(i); 2110 content.append(item.coerceToStyledText(mTextView.getContext())); 2111 } 2112 2113 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2114 2115 Object localState = event.getLocalState(); 2116 DragLocalState dragLocalState = null; 2117 if (localState instanceof DragLocalState) { 2118 dragLocalState = (DragLocalState) localState; 2119 } 2120 boolean dragDropIntoItself = dragLocalState != null && 2121 dragLocalState.sourceTextView == mTextView; 2122 2123 if (dragDropIntoItself) { 2124 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2125 // A drop inside the original selection discards the drop. 2126 return; 2127 } 2128 } 2129 2130 final int originalLength = mTextView.getText().length(); 2131 int min = offset; 2132 int max = offset; 2133 2134 Selection.setSelection((Spannable) mTextView.getText(), max); 2135 mTextView.replaceText_internal(min, max, content); 2136 2137 if (dragDropIntoItself) { 2138 int dragSourceStart = dragLocalState.start; 2139 int dragSourceEnd = dragLocalState.end; 2140 if (max <= dragSourceStart) { 2141 // Inserting text before selection has shifted positions 2142 final int shift = mTextView.getText().length() - originalLength; 2143 dragSourceStart += shift; 2144 dragSourceEnd += shift; 2145 } 2146 2147 // Delete original selection 2148 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2149 2150 // Make sure we do not leave two adjacent spaces. 2151 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2152 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2153 if (nextCharIdx > prevCharIdx + 1) { 2154 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2155 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2156 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2157 } 2158 } 2159 } 2160 } 2161 2162 public void addSpanWatchers(Spannable text) { 2163 final int textLength = text.length(); 2164 2165 if (mKeyListener != null) { 2166 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2167 } 2168 2169 if (mSpanController == null) { 2170 mSpanController = new SpanController(); 2171 } 2172 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2173 } 2174 2175 /** 2176 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2177 * pop-up should be displayed. 2178 * Also monitors {@link Selection} to call back to the attached input method. 2179 */ 2180 class SpanController implements SpanWatcher { 2181 2182 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2183 2184 private EasyEditPopupWindow mPopupWindow; 2185 2186 private Runnable mHidePopup; 2187 2188 // This function is pure but inner classes can't have static functions 2189 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2190 final Object span) { 2191 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2192 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2193 } 2194 2195 @Override 2196 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2197 if (isNonIntermediateSelectionSpan(text, span)) { 2198 sendUpdateSelection(); 2199 } else if (span instanceof EasyEditSpan) { 2200 if (mPopupWindow == null) { 2201 mPopupWindow = new EasyEditPopupWindow(); 2202 mHidePopup = new Runnable() { 2203 @Override 2204 public void run() { 2205 hide(); 2206 } 2207 }; 2208 } 2209 2210 // Make sure there is only at most one EasyEditSpan in the text 2211 if (mPopupWindow.mEasyEditSpan != null) { 2212 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2213 } 2214 2215 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2216 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2217 @Override 2218 public void onDeleteClick(EasyEditSpan span) { 2219 Editable editable = (Editable) mTextView.getText(); 2220 int start = editable.getSpanStart(span); 2221 int end = editable.getSpanEnd(span); 2222 if (start >= 0 && end >= 0) { 2223 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2224 mTextView.deleteText_internal(start, end); 2225 } 2226 editable.removeSpan(span); 2227 } 2228 }); 2229 2230 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2231 // The window is not visible yet, ignore the text change. 2232 return; 2233 } 2234 2235 if (mTextView.getLayout() == null) { 2236 // The view has not been laid out yet, ignore the text change 2237 return; 2238 } 2239 2240 if (extractedTextModeWillBeStarted()) { 2241 // The input is in extract mode. Do not handle the easy edit in 2242 // the original TextView, as the ExtractEditText will do 2243 return; 2244 } 2245 2246 mPopupWindow.show(); 2247 mTextView.removeCallbacks(mHidePopup); 2248 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2249 } 2250 } 2251 2252 @Override 2253 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2254 if (isNonIntermediateSelectionSpan(text, span)) { 2255 sendUpdateSelection(); 2256 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2257 hide(); 2258 } 2259 } 2260 2261 @Override 2262 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2263 int newStart, int newEnd) { 2264 if (isNonIntermediateSelectionSpan(text, span)) { 2265 sendUpdateSelection(); 2266 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2267 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2268 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2269 text.removeSpan(easyEditSpan); 2270 } 2271 } 2272 2273 public void hide() { 2274 if (mPopupWindow != null) { 2275 mPopupWindow.hide(); 2276 mTextView.removeCallbacks(mHidePopup); 2277 } 2278 } 2279 2280 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2281 try { 2282 PendingIntent pendingIntent = span.getPendingIntent(); 2283 if (pendingIntent != null) { 2284 Intent intent = new Intent(); 2285 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2286 pendingIntent.send(mTextView.getContext(), 0, intent); 2287 } 2288 } catch (CanceledException e) { 2289 // This should not happen, as we should try to send the intent only once. 2290 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2291 } 2292 } 2293 } 2294 2295 /** 2296 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2297 */ 2298 private interface EasyEditDeleteListener { 2299 2300 /** 2301 * Clicks the delete pop-up. 2302 */ 2303 void onDeleteClick(EasyEditSpan span); 2304 } 2305 2306 /** 2307 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2308 * by {@link SpanController}. 2309 */ 2310 private class EasyEditPopupWindow extends PinnedPopupWindow 2311 implements OnClickListener { 2312 private static final int POPUP_TEXT_LAYOUT = 2313 com.android.internal.R.layout.text_edit_action_popup_text; 2314 private TextView mDeleteTextView; 2315 private EasyEditSpan mEasyEditSpan; 2316 private EasyEditDeleteListener mOnDeleteListener; 2317 2318 @Override 2319 protected void createPopupWindow() { 2320 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2321 com.android.internal.R.attr.textSelectHandleWindowStyle); 2322 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2323 mPopupWindow.setClippingEnabled(true); 2324 } 2325 2326 @Override 2327 protected void initContentView() { 2328 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2329 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2330 mContentView = linearLayout; 2331 mContentView.setBackgroundResource( 2332 com.android.internal.R.drawable.text_edit_side_paste_window); 2333 2334 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2335 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2336 2337 LayoutParams wrapContent = new LayoutParams( 2338 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2339 2340 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2341 mDeleteTextView.setLayoutParams(wrapContent); 2342 mDeleteTextView.setText(com.android.internal.R.string.delete); 2343 mDeleteTextView.setOnClickListener(this); 2344 mContentView.addView(mDeleteTextView); 2345 } 2346 2347 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2348 mEasyEditSpan = easyEditSpan; 2349 } 2350 2351 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2352 mOnDeleteListener = listener; 2353 } 2354 2355 @Override 2356 public void onClick(View view) { 2357 if (view == mDeleteTextView 2358 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2359 && mOnDeleteListener != null) { 2360 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2361 } 2362 } 2363 2364 @Override 2365 public void hide() { 2366 if (mEasyEditSpan != null) { 2367 mEasyEditSpan.setDeleteEnabled(false); 2368 } 2369 mOnDeleteListener = null; 2370 super.hide(); 2371 } 2372 2373 @Override 2374 protected int getTextOffset() { 2375 // Place the pop-up at the end of the span 2376 Editable editable = (Editable) mTextView.getText(); 2377 return editable.getSpanEnd(mEasyEditSpan); 2378 } 2379 2380 @Override 2381 protected int getVerticalLocalPosition(int line) { 2382 return mTextView.getLayout().getLineBottom(line); 2383 } 2384 2385 @Override 2386 protected int clipVertically(int positionY) { 2387 // As we display the pop-up below the span, no vertical clipping is required. 2388 return positionY; 2389 } 2390 } 2391 2392 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2393 // 3 handles 2394 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2395 // 1 CursorAnchorInfoNotifier 2396 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2397 private TextViewPositionListener[] mPositionListeners = 2398 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2399 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2400 private boolean mPositionHasChanged = true; 2401 // Absolute position of the TextView with respect to its parent window 2402 private int mPositionX, mPositionY; 2403 private int mNumberOfListeners; 2404 private boolean mScrollHasChanged; 2405 final int[] mTempCoords = new int[2]; 2406 2407 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2408 if (mNumberOfListeners == 0) { 2409 updatePosition(); 2410 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2411 vto.addOnPreDrawListener(this); 2412 } 2413 2414 int emptySlotIndex = -1; 2415 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2416 TextViewPositionListener listener = mPositionListeners[i]; 2417 if (listener == positionListener) { 2418 return; 2419 } else if (emptySlotIndex < 0 && listener == null) { 2420 emptySlotIndex = i; 2421 } 2422 } 2423 2424 mPositionListeners[emptySlotIndex] = positionListener; 2425 mCanMove[emptySlotIndex] = canMove; 2426 mNumberOfListeners++; 2427 } 2428 2429 public void removeSubscriber(TextViewPositionListener positionListener) { 2430 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2431 if (mPositionListeners[i] == positionListener) { 2432 mPositionListeners[i] = null; 2433 mNumberOfListeners--; 2434 break; 2435 } 2436 } 2437 2438 if (mNumberOfListeners == 0) { 2439 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2440 vto.removeOnPreDrawListener(this); 2441 } 2442 } 2443 2444 public int getPositionX() { 2445 return mPositionX; 2446 } 2447 2448 public int getPositionY() { 2449 return mPositionY; 2450 } 2451 2452 @Override 2453 public boolean onPreDraw() { 2454 updatePosition(); 2455 2456 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2457 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2458 TextViewPositionListener positionListener = mPositionListeners[i]; 2459 if (positionListener != null) { 2460 positionListener.updatePosition(mPositionX, mPositionY, 2461 mPositionHasChanged, mScrollHasChanged); 2462 } 2463 } 2464 } 2465 2466 mScrollHasChanged = false; 2467 return true; 2468 } 2469 2470 private void updatePosition() { 2471 mTextView.getLocationInWindow(mTempCoords); 2472 2473 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2474 2475 mPositionX = mTempCoords[0]; 2476 mPositionY = mTempCoords[1]; 2477 } 2478 2479 public void onScrollChanged() { 2480 mScrollHasChanged = true; 2481 } 2482 } 2483 2484 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2485 protected PopupWindow mPopupWindow; 2486 protected ViewGroup mContentView; 2487 int mPositionX, mPositionY; 2488 2489 protected abstract void createPopupWindow(); 2490 protected abstract void initContentView(); 2491 protected abstract int getTextOffset(); 2492 protected abstract int getVerticalLocalPosition(int line); 2493 protected abstract int clipVertically(int positionY); 2494 2495 public PinnedPopupWindow() { 2496 createPopupWindow(); 2497 2498 mPopupWindow.setWindowLayoutType( 2499 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2500 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2501 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2502 2503 initContentView(); 2504 2505 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2506 ViewGroup.LayoutParams.WRAP_CONTENT); 2507 mContentView.setLayoutParams(wrapContent); 2508 2509 mPopupWindow.setContentView(mContentView); 2510 } 2511 2512 public void show() { 2513 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2514 2515 computeLocalPosition(); 2516 2517 final PositionListener positionListener = getPositionListener(); 2518 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2519 } 2520 2521 protected void measureContent() { 2522 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2523 mContentView.measure( 2524 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2525 View.MeasureSpec.AT_MOST), 2526 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2527 View.MeasureSpec.AT_MOST)); 2528 } 2529 2530 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2531 * positioned according to viewportToContentHorizontalOffset. 2532 * 2533 * This method assumes that mContentView has properly been measured from its content. */ 2534 private void computeLocalPosition() { 2535 measureContent(); 2536 final int width = mContentView.getMeasuredWidth(); 2537 final int offset = getTextOffset(); 2538 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2539 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2540 2541 final int line = mTextView.getLayout().getLineForOffset(offset); 2542 mPositionY = getVerticalLocalPosition(line); 2543 mPositionY += mTextView.viewportToContentVerticalOffset(); 2544 } 2545 2546 private void updatePosition(int parentPositionX, int parentPositionY) { 2547 int positionX = parentPositionX + mPositionX; 2548 int positionY = parentPositionY + mPositionY; 2549 2550 positionY = clipVertically(positionY); 2551 2552 // Horizontal clipping 2553 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2554 final int width = mContentView.getMeasuredWidth(); 2555 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2556 positionX = Math.max(0, positionX); 2557 2558 if (isShowing()) { 2559 mPopupWindow.update(positionX, positionY, -1, -1); 2560 } else { 2561 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2562 positionX, positionY); 2563 } 2564 } 2565 2566 public void hide() { 2567 mPopupWindow.dismiss(); 2568 getPositionListener().removeSubscriber(this); 2569 } 2570 2571 @Override 2572 public void updatePosition(int parentPositionX, int parentPositionY, 2573 boolean parentPositionChanged, boolean parentScrolled) { 2574 // Either parentPositionChanged or parentScrolled is true, check if still visible 2575 if (isShowing() && isOffsetVisible(getTextOffset())) { 2576 if (parentScrolled) computeLocalPosition(); 2577 updatePosition(parentPositionX, parentPositionY); 2578 } else { 2579 hide(); 2580 } 2581 } 2582 2583 public boolean isShowing() { 2584 return mPopupWindow.isShowing(); 2585 } 2586 } 2587 2588 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2589 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2590 private static final int ADD_TO_DICTIONARY = -1; 2591 private static final int DELETE_TEXT = -2; 2592 private SuggestionInfo[] mSuggestionInfos; 2593 private int mNumberOfSuggestions; 2594 private boolean mCursorWasVisibleBeforeSuggestions; 2595 private boolean mIsShowingUp = false; 2596 private SuggestionAdapter mSuggestionsAdapter; 2597 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2598 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2599 2600 private class CustomPopupWindow extends PopupWindow { 2601 public CustomPopupWindow(Context context, int defStyleAttr) { 2602 super(context, null, defStyleAttr); 2603 } 2604 2605 @Override 2606 public void dismiss() { 2607 super.dismiss(); 2608 2609 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2610 2611 // Safe cast since show() checks that mTextView.getText() is an Editable 2612 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2613 2614 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2615 if (hasInsertionController()) { 2616 getInsertionController().show(); 2617 } 2618 } 2619 } 2620 2621 public SuggestionsPopupWindow() { 2622 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2623 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2624 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2625 } 2626 2627 @Override 2628 protected void createPopupWindow() { 2629 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2630 com.android.internal.R.attr.textSuggestionsWindowStyle); 2631 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2632 mPopupWindow.setFocusable(true); 2633 mPopupWindow.setClippingEnabled(false); 2634 } 2635 2636 @Override 2637 protected void initContentView() { 2638 ListView listView = new ListView(mTextView.getContext()); 2639 mSuggestionsAdapter = new SuggestionAdapter(); 2640 listView.setAdapter(mSuggestionsAdapter); 2641 listView.setOnItemClickListener(this); 2642 mContentView = listView; 2643 2644 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2645 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2646 for (int i = 0; i < mSuggestionInfos.length; i++) { 2647 mSuggestionInfos[i] = new SuggestionInfo(); 2648 } 2649 } 2650 2651 public boolean isShowingUp() { 2652 return mIsShowingUp; 2653 } 2654 2655 public void onParentLostFocus() { 2656 mIsShowingUp = false; 2657 } 2658 2659 private class SuggestionInfo { 2660 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2661 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2662 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2663 SpannableStringBuilder text = new SpannableStringBuilder(); 2664 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2665 android.R.style.TextAppearance_SuggestionHighlight); 2666 } 2667 2668 private class SuggestionAdapter extends BaseAdapter { 2669 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2670 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2671 2672 @Override 2673 public int getCount() { 2674 return mNumberOfSuggestions; 2675 } 2676 2677 @Override 2678 public Object getItem(int position) { 2679 return mSuggestionInfos[position]; 2680 } 2681 2682 @Override 2683 public long getItemId(int position) { 2684 return position; 2685 } 2686 2687 @Override 2688 public View getView(int position, View convertView, ViewGroup parent) { 2689 TextView textView = (TextView) convertView; 2690 2691 if (textView == null) { 2692 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2693 parent, false); 2694 } 2695 2696 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2697 textView.setText(suggestionInfo.text); 2698 2699 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2700 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2701 textView.setBackgroundColor(Color.TRANSPARENT); 2702 } else { 2703 textView.setBackgroundColor(Color.WHITE); 2704 } 2705 2706 return textView; 2707 } 2708 } 2709 2710 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2711 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2712 final int flag1 = span1.getFlags(); 2713 final int flag2 = span2.getFlags(); 2714 if (flag1 != flag2) { 2715 // The order here should match what is used in updateDrawState 2716 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2717 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2718 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2719 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2720 if (easy1 && !misspelled1) return -1; 2721 if (easy2 && !misspelled2) return 1; 2722 if (misspelled1) return -1; 2723 if (misspelled2) return 1; 2724 } 2725 2726 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2727 } 2728 } 2729 2730 /** 2731 * Returns the suggestion spans that cover the current cursor position. The suggestion 2732 * spans are sorted according to the length of text that they are attached to. 2733 */ 2734 private SuggestionSpan[] getSuggestionSpans() { 2735 int pos = mTextView.getSelectionStart(); 2736 Spannable spannable = (Spannable) mTextView.getText(); 2737 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2738 2739 mSpansLengths.clear(); 2740 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2741 int start = spannable.getSpanStart(suggestionSpan); 2742 int end = spannable.getSpanEnd(suggestionSpan); 2743 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2744 } 2745 2746 // The suggestions are sorted according to their types (easy correction first, then 2747 // misspelled) and to the length of the text that they cover (shorter first). 2748 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2749 return suggestionSpans; 2750 } 2751 2752 @Override 2753 public void show() { 2754 if (!(mTextView.getText() instanceof Editable)) return; 2755 2756 if (updateSuggestions()) { 2757 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2758 mTextView.setCursorVisible(false); 2759 mIsShowingUp = true; 2760 super.show(); 2761 } 2762 } 2763 2764 @Override 2765 protected void measureContent() { 2766 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2767 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2768 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2769 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2770 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2771 2772 int width = 0; 2773 View view = null; 2774 for (int i = 0; i < mNumberOfSuggestions; i++) { 2775 view = mSuggestionsAdapter.getView(i, view, mContentView); 2776 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2777 view.measure(horizontalMeasure, verticalMeasure); 2778 width = Math.max(width, view.getMeasuredWidth()); 2779 } 2780 2781 // Enforce the width based on actual text widths 2782 mContentView.measure( 2783 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2784 verticalMeasure); 2785 2786 Drawable popupBackground = mPopupWindow.getBackground(); 2787 if (popupBackground != null) { 2788 if (mTempRect == null) mTempRect = new Rect(); 2789 popupBackground.getPadding(mTempRect); 2790 width += mTempRect.left + mTempRect.right; 2791 } 2792 mPopupWindow.setWidth(width); 2793 } 2794 2795 @Override 2796 protected int getTextOffset() { 2797 return mTextView.getSelectionStart(); 2798 } 2799 2800 @Override 2801 protected int getVerticalLocalPosition(int line) { 2802 return mTextView.getLayout().getLineBottom(line); 2803 } 2804 2805 @Override 2806 protected int clipVertically(int positionY) { 2807 final int height = mContentView.getMeasuredHeight(); 2808 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2809 return Math.min(positionY, displayMetrics.heightPixels - height); 2810 } 2811 2812 @Override 2813 public void hide() { 2814 super.hide(); 2815 } 2816 2817 private boolean updateSuggestions() { 2818 Spannable spannable = (Spannable) mTextView.getText(); 2819 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2820 2821 final int nbSpans = suggestionSpans.length; 2822 // Suggestions are shown after a delay: the underlying spans may have been removed 2823 if (nbSpans == 0) return false; 2824 2825 mNumberOfSuggestions = 0; 2826 int spanUnionStart = mTextView.getText().length(); 2827 int spanUnionEnd = 0; 2828 2829 SuggestionSpan misspelledSpan = null; 2830 int underlineColor = 0; 2831 2832 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2833 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2834 final int spanStart = spannable.getSpanStart(suggestionSpan); 2835 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2836 spanUnionStart = Math.min(spanStart, spanUnionStart); 2837 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2838 2839 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2840 misspelledSpan = suggestionSpan; 2841 } 2842 2843 // The first span dictates the background color of the highlighted text 2844 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2845 2846 String[] suggestions = suggestionSpan.getSuggestions(); 2847 int nbSuggestions = suggestions.length; 2848 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2849 String suggestion = suggestions[suggestionIndex]; 2850 2851 boolean suggestionIsDuplicate = false; 2852 for (int i = 0; i < mNumberOfSuggestions; i++) { 2853 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2854 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2855 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2856 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2857 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2858 suggestionIsDuplicate = true; 2859 break; 2860 } 2861 } 2862 } 2863 2864 if (!suggestionIsDuplicate) { 2865 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2866 suggestionInfo.suggestionSpan = suggestionSpan; 2867 suggestionInfo.suggestionIndex = suggestionIndex; 2868 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2869 2870 mNumberOfSuggestions++; 2871 2872 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2873 // Also end outer for loop 2874 spanIndex = nbSpans; 2875 break; 2876 } 2877 } 2878 } 2879 } 2880 2881 for (int i = 0; i < mNumberOfSuggestions; i++) { 2882 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2883 } 2884 2885 // Add "Add to dictionary" item if there is a span with the misspelled flag 2886 if (misspelledSpan != null) { 2887 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2888 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2889 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2890 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2891 suggestionInfo.suggestionSpan = misspelledSpan; 2892 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2893 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2894 getContext().getString(com.android.internal.R.string.addToDictionary)); 2895 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2896 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2897 2898 mNumberOfSuggestions++; 2899 } 2900 } 2901 2902 // Delete item 2903 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2904 suggestionInfo.suggestionSpan = null; 2905 suggestionInfo.suggestionIndex = DELETE_TEXT; 2906 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2907 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2908 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2909 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2910 mNumberOfSuggestions++; 2911 2912 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2913 if (underlineColor == 0) { 2914 // Fallback on the default highlight color when the first span does not provide one 2915 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2916 } else { 2917 final float BACKGROUND_TRANSPARENCY = 0.4f; 2918 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2919 mSuggestionRangeSpan.setBackgroundColor( 2920 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2921 } 2922 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2923 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2924 2925 mSuggestionsAdapter.notifyDataSetChanged(); 2926 return true; 2927 } 2928 2929 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2930 int unionEnd) { 2931 final Spannable text = (Spannable) mTextView.getText(); 2932 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2933 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2934 2935 // Adjust the start/end of the suggestion span 2936 suggestionInfo.suggestionStart = spanStart - unionStart; 2937 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2938 + suggestionInfo.text.length(); 2939 2940 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2941 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2942 2943 // Add the text before and after the span. 2944 final String textAsString = text.toString(); 2945 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2946 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2947 } 2948 2949 @Override 2950 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2951 Editable editable = (Editable) mTextView.getText(); 2952 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2953 2954 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2955 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2956 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2957 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2958 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2959 if (spanUnionEnd < editable.length() && 2960 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2961 (spanUnionStart == 0 || 2962 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2963 spanUnionEnd = spanUnionEnd + 1; 2964 } 2965 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2966 } 2967 hide(); 2968 return; 2969 } 2970 2971 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2972 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2973 if (spanStart < 0 || spanEnd <= spanStart) { 2974 // Span has been removed 2975 hide(); 2976 return; 2977 } 2978 2979 final String originalText = editable.toString().substring(spanStart, spanEnd); 2980 2981 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2982 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2983 intent.putExtra("word", originalText); 2984 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2985 // Put a listener to replace the original text with a word which the user 2986 // modified in a user dictionary dialog. 2987 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2988 mTextView.getContext().startActivity(intent); 2989 // There is no way to know if the word was indeed added. Re-check. 2990 // TODO The ExtractEditText should remove the span in the original text instead 2991 editable.removeSpan(suggestionInfo.suggestionSpan); 2992 Selection.setSelection(editable, spanEnd); 2993 updateSpellCheckSpans(spanStart, spanEnd, false); 2994 } else { 2995 // SuggestionSpans are removed by replace: save them before 2996 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2997 SuggestionSpan.class); 2998 final int length = suggestionSpans.length; 2999 int[] suggestionSpansStarts = new int[length]; 3000 int[] suggestionSpansEnds = new int[length]; 3001 int[] suggestionSpansFlags = new int[length]; 3002 for (int i = 0; i < length; i++) { 3003 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 3004 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 3005 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 3006 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 3007 3008 // Remove potential misspelled flags 3009 int suggestionSpanFlags = suggestionSpan.getFlags(); 3010 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 3011 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 3012 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 3013 suggestionSpan.setFlags(suggestionSpanFlags); 3014 } 3015 } 3016 3017 final int suggestionStart = suggestionInfo.suggestionStart; 3018 final int suggestionEnd = suggestionInfo.suggestionEnd; 3019 final String suggestion = suggestionInfo.text.subSequence( 3020 suggestionStart, suggestionEnd).toString(); 3021 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 3022 3023 // Notify source IME of the suggestion pick. Do this before 3024 // swaping texts. 3025 suggestionInfo.suggestionSpan.notifySelection( 3026 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 3027 3028 // Swap text content between actual text and Suggestion span 3029 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 3030 suggestions[suggestionInfo.suggestionIndex] = originalText; 3031 3032 // Restore previous SuggestionSpans 3033 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 3034 for (int i = 0; i < length; i++) { 3035 // Only spans that include the modified region make sense after replacement 3036 // Spans partially included in the replaced region are removed, there is no 3037 // way to assign them a valid range after replacement 3038 if (suggestionSpansStarts[i] <= spanStart && 3039 suggestionSpansEnds[i] >= spanEnd) { 3040 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 3041 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 3042 } 3043 } 3044 3045 // Move cursor at the end of the replaced word 3046 final int newCursorPosition = spanEnd + lengthDifference; 3047 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 3048 } 3049 3050 hide(); 3051 } 3052 } 3053 3054 /** 3055 * An ActionMode Callback class that is used to provide actions while in text selection mode. 3056 * 3057 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 3058 * on which of these this TextView supports. 3059 */ 3060 private class SelectionActionModeCallback extends ActionMode.Callback2 { 3061 private final Path mSelectionPath = new Path(); 3062 private final RectF mSelectionBounds = new RectF(); 3063 3064 private int mSelectionHandleHeight; 3065 private int mInsertionHandleHeight; 3066 3067 public SelectionActionModeCallback() { 3068 SelectionModifierCursorController selectionController = getSelectionController(); 3069 if (selectionController.mStartHandle == null) { 3070 // As these are for initializing selectionController, hide() must be called. 3071 selectionController.initDrawables(); 3072 selectionController.initHandles(); 3073 selectionController.hide(); 3074 } 3075 mSelectionHandleHeight = Math.max( 3076 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 3077 InsertionPointCursorController insertionController = getInsertionController(); 3078 if (insertionController != null) { 3079 insertionController.getHandle(); 3080 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3081 } 3082 } 3083 3084 @Override 3085 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3086 mode.setTitle(mTextView.getContext().getString( 3087 com.android.internal.R.string.textSelectionCABTitle)); 3088 mode.setSubtitle(null); 3089 mode.setTitleOptionalHint(true); 3090 populateMenuWithItems(menu); 3091 3092 if (mCustomSelectionActionModeCallback != null) { 3093 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3094 // The custom mode can choose to cancel the action mode 3095 return false; 3096 } 3097 } 3098 3099 addIntentMenuItemsForTextProcessing(menu); 3100 3101 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3102 mTextView.setHasTransientState(true); 3103 return true; 3104 } else { 3105 return false; 3106 } 3107 } 3108 3109 private void populateMenuWithItems(Menu menu) { 3110 if (mTextView.canCut()) { 3111 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3112 setAlphabeticShortcut('x'). 3113 setShowAsAction( 3114 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3115 } 3116 3117 if (mTextView.canCopy()) { 3118 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3119 setAlphabeticShortcut('c'). 3120 setShowAsAction( 3121 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3122 } 3123 3124 if (mTextView.canPaste()) { 3125 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3126 setAlphabeticShortcut('v'). 3127 setShowAsAction( 3128 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3129 } 3130 3131 if (mTextView.canShare()) { 3132 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3133 setShowAsAction( 3134 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3135 } 3136 3137 if (mTextView.canSelectAllText()) { 3138 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3139 setAlphabeticShortcut('a'). 3140 setShowAsAction( 3141 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3142 } 3143 3144 updateReplaceItem(menu); 3145 } 3146 3147 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3148 if (mTextView.canProcessText()) { 3149 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3150 List<ResolveInfo> supportedActivities = 3151 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3152 for (ResolveInfo info : supportedActivities) { 3153 menu.add(info.loadLabel(packageManager)) 3154 .setIntent(createProcessTextIntentForResolveInfo(info)) 3155 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM 3156 | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3157 } 3158 } 3159 } 3160 3161 private Intent createProcessTextIntent() { 3162 return new Intent() 3163 .setAction(Intent.ACTION_PROCESS_TEXT) 3164 .setType("text/plain"); 3165 } 3166 3167 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3168 return createProcessTextIntent() 3169 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3170 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3171 } 3172 3173 @Override 3174 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3175 updateReplaceItem(menu); 3176 3177 if (mCustomSelectionActionModeCallback != null) { 3178 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3179 } 3180 return true; 3181 } 3182 3183 private void updateReplaceItem(Menu menu) { 3184 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3185 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3186 if (canReplace && !replaceItemExists) { 3187 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3188 setShowAsAction( 3189 MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); 3190 } else if (!canReplace && replaceItemExists) { 3191 menu.removeItem(TextView.ID_REPLACE); 3192 } 3193 } 3194 3195 @Override 3196 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3197 if (item.getIntent() != null 3198 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3199 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3200 mPreserveDetachedSelection = true; 3201 mTextView.startActivityForResult( 3202 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3203 return true; 3204 } 3205 if (mCustomSelectionActionModeCallback != null && 3206 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3207 return true; 3208 } 3209 return mTextView.onTextContextMenuItem(item.getItemId()); 3210 } 3211 3212 @Override 3213 public void onDestroyActionMode(ActionMode mode) { 3214 if (mCustomSelectionActionModeCallback != null) { 3215 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3216 } 3217 3218 /* 3219 * If we're ending this mode because we're detaching from a window, 3220 * we still have selection state to preserve. Don't clear it, we'll 3221 * bring back the selection mode when (if) we get reattached. 3222 */ 3223 if (!mPreserveDetachedSelection) { 3224 Selection.setSelection((Spannable) mTextView.getText(), 3225 mTextView.getSelectionEnd()); 3226 mTextView.setHasTransientState(false); 3227 } 3228 3229 if (mSelectionModifierCursorController != null) { 3230 mSelectionModifierCursorController.hide(); 3231 mSelectionModifierCursorController.resetTouchOffsets(); 3232 } 3233 3234 mSelectionActionMode = null; 3235 } 3236 3237 @Override 3238 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3239 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3240 super.onGetContentRect(mode, view, outRect); 3241 return; 3242 } 3243 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3244 // We have a selection. 3245 mSelectionPath.reset(); 3246 mTextView.getLayout().getSelectionPath( 3247 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3248 mSelectionPath.computeBounds(mSelectionBounds, true); 3249 mSelectionBounds.bottom += mSelectionHandleHeight; 3250 } else if (mCursorCount == 2) { 3251 // We have a split cursor. In this case, we take the rectangle that includes both 3252 // parts of the cursor to ensure we don't obscure either of them. 3253 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3254 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3255 mSelectionBounds.set( 3256 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3257 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3258 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3259 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3260 + mInsertionHandleHeight); 3261 } else { 3262 // We have a single cursor. 3263 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3264 float primaryHorizontal = 3265 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3266 mSelectionBounds.set( 3267 primaryHorizontal, 3268 mTextView.getLayout().getLineTop(line), 3269 primaryHorizontal + 1, 3270 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3271 } 3272 // Take TextView's padding and scroll into account. 3273 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3274 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3275 outRect.set( 3276 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3277 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3278 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3279 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3280 } 3281 } 3282 3283 /** 3284 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3285 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3286 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3287 */ 3288 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3289 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3290 final int[] mTmpIntOffset = new int[2]; 3291 final Matrix mViewToScreenMatrix = new Matrix(); 3292 3293 @Override 3294 public void updatePosition(int parentPositionX, int parentPositionY, 3295 boolean parentPositionChanged, boolean parentScrolled) { 3296 final InputMethodState ims = mInputMethodState; 3297 if (ims == null || ims.mBatchEditNesting > 0) { 3298 return; 3299 } 3300 final InputMethodManager imm = InputMethodManager.peekInstance(); 3301 if (null == imm) { 3302 return; 3303 } 3304 if (!imm.isActive(mTextView)) { 3305 return; 3306 } 3307 // Skip if the IME has not requested the cursor/anchor position. 3308 if (!imm.isCursorAnchorInfoEnabled()) { 3309 return; 3310 } 3311 Layout layout = mTextView.getLayout(); 3312 if (layout == null) { 3313 return; 3314 } 3315 3316 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3317 builder.reset(); 3318 3319 final int selectionStart = mTextView.getSelectionStart(); 3320 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3321 3322 // Construct transformation matrix from view local coordinates to screen coordinates. 3323 mViewToScreenMatrix.set(mTextView.getMatrix()); 3324 mTextView.getLocationOnScreen(mTmpIntOffset); 3325 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3326 builder.setMatrix(mViewToScreenMatrix); 3327 3328 final float viewportToContentHorizontalOffset = 3329 mTextView.viewportToContentHorizontalOffset(); 3330 final float viewportToContentVerticalOffset = 3331 mTextView.viewportToContentVerticalOffset(); 3332 3333 final CharSequence text = mTextView.getText(); 3334 if (text instanceof Spannable) { 3335 final Spannable sp = (Spannable) text; 3336 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3337 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3338 if (composingTextEnd < composingTextStart) { 3339 final int temp = composingTextEnd; 3340 composingTextEnd = composingTextStart; 3341 composingTextStart = temp; 3342 } 3343 final boolean hasComposingText = 3344 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3345 if (hasComposingText) { 3346 final CharSequence composingText = text.subSequence(composingTextStart, 3347 composingTextEnd); 3348 builder.setComposingText(composingTextStart, composingText); 3349 3350 final int minLine = layout.getLineForOffset(composingTextStart); 3351 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3352 for (int line = minLine; line <= maxLine; ++line) { 3353 final int lineStart = layout.getLineStart(line); 3354 final int lineEnd = layout.getLineEnd(line); 3355 final int offsetStart = Math.max(lineStart, composingTextStart); 3356 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3357 final boolean ltrLine = 3358 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3359 final float[] widths = new float[offsetEnd - offsetStart]; 3360 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3361 final float top = layout.getLineTop(line); 3362 final float bottom = layout.getLineBottom(line); 3363 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3364 final float charWidth = widths[offset - offsetStart]; 3365 final boolean isRtl = layout.isRtlCharAt(offset); 3366 final float primary = layout.getPrimaryHorizontal(offset); 3367 final float secondary = layout.getSecondaryHorizontal(offset); 3368 // TODO: This doesn't work perfectly for text with custom styles and 3369 // TAB chars. 3370 final float left; 3371 final float right; 3372 if (ltrLine) { 3373 if (isRtl) { 3374 left = secondary - charWidth; 3375 right = secondary; 3376 } else { 3377 left = primary; 3378 right = primary + charWidth; 3379 } 3380 } else { 3381 if (!isRtl) { 3382 left = secondary; 3383 right = secondary + charWidth; 3384 } else { 3385 left = primary - charWidth; 3386 right = primary; 3387 } 3388 } 3389 // TODO: Check top-right and bottom-left as well. 3390 final float localLeft = left + viewportToContentHorizontalOffset; 3391 final float localRight = right + viewportToContentHorizontalOffset; 3392 final float localTop = top + viewportToContentVerticalOffset; 3393 final float localBottom = bottom + viewportToContentVerticalOffset; 3394 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3395 final boolean isBottomRightVisible = 3396 isPositionVisible(localRight, localBottom); 3397 int characterBoundsFlags = 0; 3398 if (isTopLeftVisible || isBottomRightVisible) { 3399 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3400 } 3401 if (!isTopLeftVisible || !isBottomRightVisible) { 3402 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3403 } 3404 if (isRtl) { 3405 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3406 } 3407 // Here offset is the index in Java chars. 3408 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3409 localBottom, characterBoundsFlags); 3410 } 3411 } 3412 } 3413 } 3414 3415 // Treat selectionStart as the insertion point. 3416 if (0 <= selectionStart) { 3417 final int offset = selectionStart; 3418 final int line = layout.getLineForOffset(offset); 3419 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3420 + viewportToContentHorizontalOffset; 3421 final float insertionMarkerTop = layout.getLineTop(line) 3422 + viewportToContentVerticalOffset; 3423 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3424 + viewportToContentVerticalOffset; 3425 final float insertionMarkerBottom = layout.getLineBottom(line) 3426 + viewportToContentVerticalOffset; 3427 final boolean isTopVisible = 3428 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3429 final boolean isBottomVisible = 3430 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3431 int insertionMarkerFlags = 0; 3432 if (isTopVisible || isBottomVisible) { 3433 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3434 } 3435 if (!isTopVisible || !isBottomVisible) { 3436 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3437 } 3438 if (layout.isRtlCharAt(offset)) { 3439 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3440 } 3441 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3442 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3443 } 3444 3445 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3446 } 3447 } 3448 3449 private abstract class HandleView extends View implements TextViewPositionListener { 3450 protected Drawable mDrawable; 3451 protected Drawable mDrawableLtr; 3452 protected Drawable mDrawableRtl; 3453 private final PopupWindow mContainer; 3454 // Position with respect to the parent TextView 3455 private int mPositionX, mPositionY; 3456 private boolean mIsDragging; 3457 // Offset from touch position to mPosition 3458 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3459 protected int mHotspotX; 3460 protected int mHorizontalGravity; 3461 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3462 private float mTouchOffsetY; 3463 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3464 private float mIdealVerticalOffset; 3465 // Parent's (TextView) previous position in window 3466 private int mLastParentX, mLastParentY; 3467 // Previous text character offset 3468 protected int mPreviousOffset = -1; 3469 // Previous text character offset 3470 private boolean mPositionHasChanged = true; 3471 // Minimum touch target size for handles 3472 private int mMinSize; 3473 // Indicates the line of text that the handle is on. 3474 protected int mPrevLine = -1; 3475 3476 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3477 super(mTextView.getContext()); 3478 mContainer = new PopupWindow(mTextView.getContext(), null, 3479 com.android.internal.R.attr.textSelectHandleWindowStyle); 3480 mContainer.setSplitTouchEnabled(true); 3481 mContainer.setClippingEnabled(false); 3482 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3483 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3484 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3485 mContainer.setContentView(this); 3486 3487 mDrawableLtr = drawableLtr; 3488 mDrawableRtl = drawableRtl; 3489 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3490 com.android.internal.R.dimen.text_handle_min_size); 3491 3492 updateDrawable(); 3493 3494 final int handleHeight = getPreferredHeight(); 3495 mTouchOffsetY = -0.3f * handleHeight; 3496 mIdealVerticalOffset = 0.7f * handleHeight; 3497 } 3498 3499 public float getIdealVerticalOffset() { 3500 return mIdealVerticalOffset; 3501 } 3502 3503 protected void updateDrawable() { 3504 final int offset = getCurrentCursorOffset(); 3505 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3506 final Drawable oldDrawable = mDrawable; 3507 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3508 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3509 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3510 if (oldDrawable != mDrawable) { 3511 postInvalidate(); 3512 } 3513 } 3514 3515 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3516 protected abstract int getHorizontalGravity(boolean isRtlRun); 3517 3518 // Touch-up filter: number of previous positions remembered 3519 private static final int HISTORY_SIZE = 5; 3520 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3521 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3522 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3523 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3524 private int mPreviousOffsetIndex = 0; 3525 private int mNumberPreviousOffsets = 0; 3526 3527 private void startTouchUpFilter(int offset) { 3528 mNumberPreviousOffsets = 0; 3529 addPositionToTouchUpFilter(offset); 3530 } 3531 3532 private void addPositionToTouchUpFilter(int offset) { 3533 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3534 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3535 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3536 mNumberPreviousOffsets++; 3537 } 3538 3539 private void filterOnTouchUp() { 3540 final long now = SystemClock.uptimeMillis(); 3541 int i = 0; 3542 int index = mPreviousOffsetIndex; 3543 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3544 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3545 i++; 3546 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3547 } 3548 3549 if (i > 0 && i < iMax && 3550 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3551 positionAtCursorOffset(mPreviousOffsets[index], false); 3552 } 3553 } 3554 3555 public boolean offsetHasBeenChanged() { 3556 return mNumberPreviousOffsets > 1; 3557 } 3558 3559 @Override 3560 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3561 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3562 } 3563 3564 private int getPreferredWidth() { 3565 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3566 } 3567 3568 private int getPreferredHeight() { 3569 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3570 } 3571 3572 public void show() { 3573 if (isShowing()) return; 3574 3575 getPositionListener().addSubscriber(this, true /* local position may change */); 3576 3577 // Make sure the offset is always considered new, even when focusing at same position 3578 mPreviousOffset = -1; 3579 positionAtCursorOffset(getCurrentCursorOffset(), false); 3580 } 3581 3582 protected void dismiss() { 3583 mIsDragging = false; 3584 mContainer.dismiss(); 3585 onDetached(); 3586 } 3587 3588 public void hide() { 3589 dismiss(); 3590 3591 getPositionListener().removeSubscriber(this); 3592 } 3593 3594 public boolean isShowing() { 3595 return mContainer.isShowing(); 3596 } 3597 3598 private boolean isVisible() { 3599 // Always show a dragging handle. 3600 if (mIsDragging) { 3601 return true; 3602 } 3603 3604 if (mTextView.isInBatchEditMode()) { 3605 return false; 3606 } 3607 3608 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3609 } 3610 3611 public abstract int getCurrentCursorOffset(); 3612 3613 protected abstract void updateSelection(int offset); 3614 3615 public abstract void updatePosition(float x, float y); 3616 3617 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3618 // A HandleView relies on the layout, which may be nulled by external methods 3619 Layout layout = mTextView.getLayout(); 3620 if (layout == null) { 3621 // Will update controllers' state, hiding them and stopping selection mode if needed 3622 prepareCursorControllers(); 3623 return; 3624 } 3625 3626 boolean offsetChanged = offset != mPreviousOffset; 3627 if (offsetChanged || parentScrolled) { 3628 if (offsetChanged) { 3629 updateSelection(offset); 3630 addPositionToTouchUpFilter(offset); 3631 } 3632 final int line = layout.getLineForOffset(offset); 3633 mPrevLine = line; 3634 3635 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3636 getHorizontalOffset() + getCursorOffset()); 3637 mPositionY = layout.getLineBottom(line); 3638 3639 // Take TextView's padding and scroll into account. 3640 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3641 mPositionY += mTextView.viewportToContentVerticalOffset(); 3642 3643 mPreviousOffset = offset; 3644 mPositionHasChanged = true; 3645 } 3646 } 3647 3648 public void updatePosition(int parentPositionX, int parentPositionY, 3649 boolean parentPositionChanged, boolean parentScrolled) { 3650 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3651 if (parentPositionChanged || mPositionHasChanged) { 3652 if (mIsDragging) { 3653 // Update touchToWindow offset in case of parent scrolling while dragging 3654 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3655 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3656 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3657 mLastParentX = parentPositionX; 3658 mLastParentY = parentPositionY; 3659 } 3660 3661 onHandleMoved(); 3662 } 3663 3664 if (isVisible()) { 3665 final int positionX = parentPositionX + mPositionX; 3666 final int positionY = parentPositionY + mPositionY; 3667 if (isShowing()) { 3668 mContainer.update(positionX, positionY, -1, -1); 3669 } else { 3670 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3671 positionX, positionY); 3672 } 3673 } else { 3674 if (isShowing()) { 3675 dismiss(); 3676 } 3677 } 3678 3679 mPositionHasChanged = false; 3680 } 3681 } 3682 3683 public void showAtLocation(int offset) { 3684 // TODO - investigate if there's a better way to show the handles 3685 // after the drag accelerator has occured. 3686 int[] tmpCords = new int[2]; 3687 mTextView.getLocationInWindow(tmpCords); 3688 3689 Layout layout = mTextView.getLayout(); 3690 int posX = tmpCords[0]; 3691 int posY = tmpCords[1]; 3692 3693 final int line = layout.getLineForOffset(offset); 3694 3695 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3696 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3697 int startY = layout.getLineBottom(line); 3698 3699 // Take TextView's padding and scroll into account. 3700 startX += mTextView.viewportToContentHorizontalOffset(); 3701 startY += mTextView.viewportToContentVerticalOffset(); 3702 3703 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3704 startX + posX, startY + posY); 3705 } 3706 3707 @Override 3708 protected void onDraw(Canvas c) { 3709 final int drawWidth = mDrawable.getIntrinsicWidth(); 3710 final int left = getHorizontalOffset(); 3711 3712 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3713 mDrawable.draw(c); 3714 } 3715 3716 private int getHorizontalOffset() { 3717 final int width = getPreferredWidth(); 3718 final int drawWidth = mDrawable.getIntrinsicWidth(); 3719 final int left; 3720 switch (mHorizontalGravity) { 3721 case Gravity.LEFT: 3722 left = 0; 3723 break; 3724 default: 3725 case Gravity.CENTER: 3726 left = (width - drawWidth) / 2; 3727 break; 3728 case Gravity.RIGHT: 3729 left = width - drawWidth; 3730 break; 3731 } 3732 return left; 3733 } 3734 3735 protected int getCursorOffset() { 3736 return 0; 3737 } 3738 3739 @Override 3740 public boolean onTouchEvent(MotionEvent ev) { 3741 updateFloatingToolbarVisibility(ev); 3742 3743 switch (ev.getActionMasked()) { 3744 case MotionEvent.ACTION_DOWN: { 3745 startTouchUpFilter(getCurrentCursorOffset()); 3746 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3747 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3748 3749 final PositionListener positionListener = getPositionListener(); 3750 mLastParentX = positionListener.getPositionX(); 3751 mLastParentY = positionListener.getPositionY(); 3752 mIsDragging = true; 3753 break; 3754 } 3755 3756 case MotionEvent.ACTION_MOVE: { 3757 final float rawX = ev.getRawX(); 3758 final float rawY = ev.getRawY(); 3759 3760 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3761 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3762 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3763 float newVerticalOffset; 3764 if (previousVerticalOffset < mIdealVerticalOffset) { 3765 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3766 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3767 } else { 3768 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3769 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3770 } 3771 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3772 3773 final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX; 3774 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3775 3776 updatePosition(newPosX, newPosY); 3777 break; 3778 } 3779 3780 case MotionEvent.ACTION_UP: 3781 filterOnTouchUp(); 3782 mIsDragging = false; 3783 break; 3784 3785 case MotionEvent.ACTION_CANCEL: 3786 mIsDragging = false; 3787 break; 3788 } 3789 return true; 3790 } 3791 3792 public boolean isDragging() { 3793 return mIsDragging; 3794 } 3795 3796 void onHandleMoved() {} 3797 3798 public void onDetached() {} 3799 } 3800 3801 private class InsertionHandleView extends HandleView { 3802 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3803 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3804 3805 // Used to detect taps on the insertion handle, which will affect the selection action mode 3806 private float mDownPositionX, mDownPositionY; 3807 private Runnable mHider; 3808 3809 public InsertionHandleView(Drawable drawable) { 3810 super(drawable, drawable); 3811 } 3812 3813 @Override 3814 public void show() { 3815 super.show(); 3816 3817 final long durationSinceCutOrCopy = 3818 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 3819 3820 // Cancel the single tap delayed runnable. 3821 if (mDoubleTap && mSelectionModeWithoutSelectionRunnable != null) { 3822 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 3823 } 3824 3825 // Prepare and schedule the single tap runnable to run exactly after the double tap 3826 // timeout has passed. 3827 if (!mDoubleTap && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 3828 if (mSelectionModeWithoutSelectionRunnable == null) { 3829 mSelectionModeWithoutSelectionRunnable = new Runnable() { 3830 public void run() { 3831 startSelectionActionModeWithoutSelection(); 3832 } 3833 }; 3834 } 3835 3836 mTextView.postDelayed( 3837 mSelectionModeWithoutSelectionRunnable, 3838 ViewConfiguration.getDoubleTapTimeout() + 1); 3839 } 3840 3841 hideAfterDelay(); 3842 } 3843 3844 private void hideAfterDelay() { 3845 if (mHider == null) { 3846 mHider = new Runnable() { 3847 public void run() { 3848 hide(); 3849 } 3850 }; 3851 } else { 3852 removeHiderCallback(); 3853 } 3854 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3855 } 3856 3857 private void removeHiderCallback() { 3858 if (mHider != null) { 3859 mTextView.removeCallbacks(mHider); 3860 } 3861 } 3862 3863 @Override 3864 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3865 return drawable.getIntrinsicWidth() / 2; 3866 } 3867 3868 @Override 3869 protected int getHorizontalGravity(boolean isRtlRun) { 3870 return Gravity.CENTER_HORIZONTAL; 3871 } 3872 3873 @Override 3874 protected int getCursorOffset() { 3875 int offset = super.getCursorOffset(); 3876 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3877 if (cursor != null) { 3878 cursor.getPadding(mTempRect); 3879 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3880 } 3881 return offset; 3882 } 3883 3884 @Override 3885 public boolean onTouchEvent(MotionEvent ev) { 3886 final boolean result = super.onTouchEvent(ev); 3887 3888 switch (ev.getActionMasked()) { 3889 case MotionEvent.ACTION_DOWN: 3890 mDownPositionX = ev.getRawX(); 3891 mDownPositionY = ev.getRawY(); 3892 break; 3893 3894 case MotionEvent.ACTION_UP: 3895 if (!offsetHasBeenChanged()) { 3896 final float deltaX = mDownPositionX - ev.getRawX(); 3897 final float deltaY = mDownPositionY - ev.getRawY(); 3898 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3899 3900 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3901 mTextView.getContext()); 3902 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3903 3904 if (distanceSquared < touchSlop * touchSlop) { 3905 // Tapping on the handle toggles the selection action mode. 3906 if (mSelectionActionMode != null) { 3907 mSelectionActionMode.finish(); 3908 } else { 3909 startSelectionActionModeWithoutSelection(); 3910 } 3911 } 3912 } else { 3913 if (mSelectionActionMode != null) { 3914 mSelectionActionMode.invalidateContentRect(); 3915 } 3916 } 3917 hideAfterDelay(); 3918 break; 3919 3920 case MotionEvent.ACTION_CANCEL: 3921 hideAfterDelay(); 3922 break; 3923 3924 default: 3925 break; 3926 } 3927 3928 return result; 3929 } 3930 3931 @Override 3932 public int getCurrentCursorOffset() { 3933 return mTextView.getSelectionStart(); 3934 } 3935 3936 @Override 3937 public void updateSelection(int offset) { 3938 Selection.setSelection((Spannable) mTextView.getText(), offset); 3939 } 3940 3941 @Override 3942 public void updatePosition(float x, float y) { 3943 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3944 if (mSelectionActionMode != null) { 3945 mSelectionActionMode.invalidate(); 3946 } 3947 } 3948 3949 @Override 3950 void onHandleMoved() { 3951 super.onHandleMoved(); 3952 removeHiderCallback(); 3953 } 3954 3955 @Override 3956 public void onDetached() { 3957 super.onDetached(); 3958 removeHiderCallback(); 3959 } 3960 } 3961 3962 private class SelectionStartHandleView extends HandleView { 3963 // Indicates whether the cursor is making adjustments within a word. 3964 private boolean mInWord = false; 3965 // Difference between touch position and word boundary position. 3966 private float mTouchWordDelta; 3967 3968 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3969 super(drawableLtr, drawableRtl); 3970 } 3971 3972 @Override 3973 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3974 if (isRtlRun) { 3975 return drawable.getIntrinsicWidth() / 4; 3976 } else { 3977 return (drawable.getIntrinsicWidth() * 3) / 4; 3978 } 3979 } 3980 3981 @Override 3982 protected int getHorizontalGravity(boolean isRtlRun) { 3983 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3984 } 3985 3986 @Override 3987 public int getCurrentCursorOffset() { 3988 return mTextView.getSelectionStart(); 3989 } 3990 3991 @Override 3992 public void updateSelection(int offset) { 3993 Selection.setSelection((Spannable) mTextView.getText(), offset, 3994 mTextView.getSelectionEnd()); 3995 updateDrawable(); 3996 if (mSelectionActionMode != null) { 3997 mSelectionActionMode.invalidate(); 3998 } 3999 } 4000 4001 @Override 4002 public void updatePosition(float x, float y) { 4003 final int selectionEnd = mTextView.getSelectionEnd(); 4004 final Layout layout = mTextView.getLayout(); 4005 int initialOffset = mTextView.getOffsetForPosition(x, y); 4006 int currLine = mTextView.getLineAtCoordinate(y); 4007 boolean positionCursor = false; 4008 4009 if (initialOffset >= selectionEnd) { 4010 // Handles have crossed, bound it to the last selected line and 4011 // adjust by word / char as normal. 4012 currLine = layout != null ? layout.getLineForOffset(selectionEnd) : mPrevLine; 4013 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4014 } 4015 4016 int offset = initialOffset; 4017 int end = getWordEnd(offset); 4018 int start = getWordStart(offset); 4019 4020 if (offset < mPreviousOffset) { 4021 // User is increasing the selection. 4022 if (!mInWord || currLine < mPrevLine) { 4023 // We're not in a word, or we're on a different line so we'll expand by 4024 // word. First ensure the user has at least entered the next word. 4025 int offsetToWord = Math.min((end - start) / 2, 2); 4026 if (offset <= end - offsetToWord || currLine < mPrevLine) { 4027 offset = start; 4028 } else { 4029 offset = mPreviousOffset; 4030 } 4031 } 4032 if (layout != null && offset < initialOffset) { 4033 final float adjustedX = layout.getPrimaryHorizontal(offset); 4034 mTouchWordDelta = 4035 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4036 } else { 4037 mTouchWordDelta = 0.0f; 4038 } 4039 positionCursor = true; 4040 } else { 4041 final int adjustedOffset = 4042 mTextView.getOffsetAtCoordinate(currLine, x - mTouchWordDelta); 4043 if (adjustedOffset > mPreviousOffset || currLine > mPrevLine) { 4044 // User is shrinking the selection. 4045 if (currLine > mPrevLine) { 4046 // We're on a different line, so we'll snap to word boundaries. 4047 offset = start; 4048 if (layout != null && offset < initialOffset) { 4049 final float adjustedX = layout.getPrimaryHorizontal(offset); 4050 mTouchWordDelta = 4051 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4052 } else { 4053 mTouchWordDelta = 0.0f; 4054 } 4055 } else { 4056 offset = adjustedOffset; 4057 } 4058 positionCursor = true; 4059 } 4060 } 4061 4062 if (positionCursor) { 4063 // Handles can not cross and selection is at least one character. 4064 if (offset >= selectionEnd) { 4065 offset = getNextCursorOffset(selectionEnd, false); 4066 mTouchWordDelta = 0.0f; 4067 } 4068 mInWord = !getWordIteratorWithText().isBoundary(offset); 4069 positionAtCursorOffset(offset, false); 4070 } 4071 } 4072 4073 @Override 4074 public boolean onTouchEvent(MotionEvent event) { 4075 boolean superResult = super.onTouchEvent(event); 4076 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4077 // Reset the touch word offset when the user has lifted their finger. 4078 mTouchWordDelta = 0.0f; 4079 } 4080 return superResult; 4081 } 4082 } 4083 4084 private class SelectionEndHandleView extends HandleView { 4085 // Indicates whether the cursor is making adjustments within a word. 4086 private boolean mInWord = false; 4087 // Difference between touch position and word boundary position. 4088 private float mTouchWordDelta; 4089 4090 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4091 super(drawableLtr, drawableRtl); 4092 } 4093 4094 @Override 4095 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4096 if (isRtlRun) { 4097 return (drawable.getIntrinsicWidth() * 3) / 4; 4098 } else { 4099 return drawable.getIntrinsicWidth() / 4; 4100 } 4101 } 4102 4103 @Override 4104 protected int getHorizontalGravity(boolean isRtlRun) { 4105 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 4106 } 4107 4108 @Override 4109 public int getCurrentCursorOffset() { 4110 return mTextView.getSelectionEnd(); 4111 } 4112 4113 @Override 4114 public void updateSelection(int offset) { 4115 Selection.setSelection((Spannable) mTextView.getText(), 4116 mTextView.getSelectionStart(), offset); 4117 if (mSelectionActionMode != null) { 4118 mSelectionActionMode.invalidate(); 4119 } 4120 updateDrawable(); 4121 } 4122 4123 @Override 4124 public void updatePosition(float x, float y) { 4125 final int selectionStart = mTextView.getSelectionStart(); 4126 final Layout layout = mTextView.getLayout(); 4127 int initialOffset = mTextView.getOffsetForPosition(x, y); 4128 int currLine = mTextView.getLineAtCoordinate(y); 4129 boolean positionCursor = false; 4130 4131 if (initialOffset <= selectionStart) { 4132 // Handles have crossed, bound it to the first selected line and 4133 // adjust by word / char as normal. 4134 currLine = layout != null ? layout.getLineForOffset(selectionStart) : mPrevLine; 4135 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4136 } 4137 4138 int offset = initialOffset; 4139 int end = getWordEnd(offset); 4140 int start = getWordStart(offset); 4141 4142 if (offset > mPreviousOffset) { 4143 // User is increasing the selection. 4144 if (!mInWord || currLine > mPrevLine) { 4145 // We're not in a word, or we're on a different line so we'll expand by 4146 // word. First ensure the user has at least entered the next word. 4147 int midPoint = Math.min((end - start) / 2, 2); 4148 if (offset >= start + midPoint || currLine > mPrevLine) { 4149 offset = end; 4150 } else { 4151 offset = mPreviousOffset; 4152 } 4153 } 4154 if (layout != null && offset > initialOffset) { 4155 final float adjustedX = layout.getPrimaryHorizontal(offset); 4156 mTouchWordDelta = 4157 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4158 } else { 4159 mTouchWordDelta = 0.0f; 4160 } 4161 positionCursor = true; 4162 } else { 4163 final int adjustedOffset = 4164 mTextView.getOffsetAtCoordinate(currLine, x + mTouchWordDelta); 4165 if (adjustedOffset < mPreviousOffset || currLine < mPrevLine) { 4166 // User is shrinking the selection. 4167 if (currLine < mPrevLine) { 4168 // We're on a different line, so we'll snap to word boundaries. 4169 offset = end; 4170 if (layout != null && offset > initialOffset) { 4171 final float adjustedX = layout.getPrimaryHorizontal(offset); 4172 mTouchWordDelta = 4173 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4174 } else { 4175 mTouchWordDelta = 0.0f; 4176 } 4177 } else { 4178 offset = adjustedOffset; 4179 } 4180 positionCursor = true; 4181 } 4182 } 4183 4184 if (positionCursor) { 4185 // Handles can not cross and selection is at least one character. 4186 if (offset <= selectionStart) { 4187 offset = getNextCursorOffset(selectionStart, true); 4188 mTouchWordDelta = 0.0f; 4189 } 4190 mInWord = !getWordIteratorWithText().isBoundary(offset); 4191 positionAtCursorOffset(offset, false); 4192 } 4193 } 4194 4195 @Override 4196 public boolean onTouchEvent(MotionEvent event) { 4197 boolean superResult = super.onTouchEvent(event); 4198 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4199 // Reset the touch word offset when the user has lifted their finger. 4200 mTouchWordDelta = 0.0f; 4201 } 4202 return superResult; 4203 } 4204 } 4205 4206 /** 4207 * A CursorController instance can be used to control a cursor in the text. 4208 */ 4209 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4210 /** 4211 * Makes the cursor controller visible on screen. 4212 * See also {@link #hide()}. 4213 */ 4214 public void show(); 4215 4216 /** 4217 * Hide the cursor controller from screen. 4218 * See also {@link #show()}. 4219 */ 4220 public void hide(); 4221 4222 /** 4223 * Called when the view is detached from window. Perform house keeping task, such as 4224 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4225 * preventing the activity from being recycled. 4226 */ 4227 public void onDetached(); 4228 } 4229 4230 private class InsertionPointCursorController implements CursorController { 4231 private InsertionHandleView mHandle; 4232 4233 public void show() { 4234 getHandle().show(); 4235 4236 if (mSelectionModifierCursorController != null) { 4237 mSelectionModifierCursorController.hide(); 4238 } 4239 } 4240 4241 public void hide() { 4242 if (mHandle != null) { 4243 mHandle.hide(); 4244 } 4245 } 4246 4247 public void onTouchModeChanged(boolean isInTouchMode) { 4248 if (!isInTouchMode) { 4249 hide(); 4250 } 4251 } 4252 4253 private InsertionHandleView getHandle() { 4254 if (mSelectHandleCenter == null) { 4255 mSelectHandleCenter = mTextView.getContext().getDrawable( 4256 mTextView.mTextSelectHandleRes); 4257 } 4258 if (mHandle == null) { 4259 mHandle = new InsertionHandleView(mSelectHandleCenter); 4260 } 4261 return mHandle; 4262 } 4263 4264 @Override 4265 public void onDetached() { 4266 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4267 observer.removeOnTouchModeChangeListener(this); 4268 4269 if (mHandle != null) mHandle.onDetached(); 4270 } 4271 } 4272 4273 class SelectionModifierCursorController implements CursorController { 4274 // The cursor controller handles, lazily created when shown. 4275 private SelectionStartHandleView mStartHandle; 4276 private SelectionEndHandleView mEndHandle; 4277 // The offsets of that last touch down event. Remembered to start selection there. 4278 private int mMinTouchOffset, mMaxTouchOffset; 4279 4280 private float mDownPositionX, mDownPositionY; 4281 private boolean mGestureStayedInTapRegion; 4282 4283 // Where the user first starts the drag motion. 4284 private int mStartOffset = -1; 4285 // Indicates whether the user is selecting text and using the drag accelerator. 4286 private boolean mDragAcceleratorActive; 4287 private boolean mHaventMovedEnoughToStartDrag; 4288 4289 SelectionModifierCursorController() { 4290 resetTouchOffsets(); 4291 } 4292 4293 public void show() { 4294 if (mTextView.isInBatchEditMode()) { 4295 return; 4296 } 4297 initDrawables(); 4298 initHandles(); 4299 hideInsertionPointCursorController(); 4300 } 4301 4302 private void initDrawables() { 4303 if (mSelectHandleLeft == null) { 4304 mSelectHandleLeft = mTextView.getContext().getDrawable( 4305 mTextView.mTextSelectHandleLeftRes); 4306 } 4307 if (mSelectHandleRight == null) { 4308 mSelectHandleRight = mTextView.getContext().getDrawable( 4309 mTextView.mTextSelectHandleRightRes); 4310 } 4311 } 4312 4313 private void initHandles() { 4314 // Lazy object creation has to be done before updatePosition() is called. 4315 if (mStartHandle == null) { 4316 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4317 } 4318 if (mEndHandle == null) { 4319 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4320 } 4321 4322 mStartHandle.show(); 4323 mEndHandle.show(); 4324 4325 hideInsertionPointCursorController(); 4326 } 4327 4328 public void hide() { 4329 if (mStartHandle != null) mStartHandle.hide(); 4330 if (mEndHandle != null) mEndHandle.hide(); 4331 } 4332 4333 public void enterDrag() { 4334 // Just need to init the handles / hide insertion cursor. 4335 show(); 4336 mDragAcceleratorActive = true; 4337 // Start location of selection. 4338 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4339 mLastDownPositionY); 4340 // Don't show the handles until user has lifted finger. 4341 hide(); 4342 4343 // This stops scrolling parents from intercepting the touch event, allowing 4344 // the user to continue dragging across the screen to select text; TextView will 4345 // scroll as necessary. 4346 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4347 } 4348 4349 public void onTouchEvent(MotionEvent event) { 4350 // This is done even when the View does not have focus, so that long presses can start 4351 // selection and tap can move cursor from this tap position. 4352 final float eventX = event.getX(); 4353 final float eventY = event.getY(); 4354 switch (event.getActionMasked()) { 4355 case MotionEvent.ACTION_DOWN: 4356 4357 // Remember finger down position, to be able to start selection from there. 4358 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 4359 eventX, eventY); 4360 4361 // Double tap detection 4362 if (mGestureStayedInTapRegion) { 4363 if (mDoubleTap) { 4364 final float deltaX = eventX - mDownPositionX; 4365 final float deltaY = eventY - mDownPositionY; 4366 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4367 4368 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4369 mTextView.getContext()); 4370 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4371 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4372 4373 if (stayedInArea && isPositionOnText(eventX, eventY)) { 4374 startSelectionActionModeWithSelectionAndStartDrag(); 4375 mDiscardNextActionUp = true; 4376 } 4377 } 4378 } 4379 4380 mDownPositionX = eventX; 4381 mDownPositionY = eventY; 4382 mGestureStayedInTapRegion = true; 4383 mHaventMovedEnoughToStartDrag = true; 4384 break; 4385 4386 case MotionEvent.ACTION_POINTER_DOWN: 4387 case MotionEvent.ACTION_POINTER_UP: 4388 // Handle multi-point gestures. Keep min and max offset positions. 4389 // Only activated for devices that correctly handle multi-touch. 4390 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4391 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4392 updateMinAndMaxOffsets(event); 4393 } 4394 break; 4395 4396 case MotionEvent.ACTION_MOVE: 4397 final ViewConfiguration viewConfig = ViewConfiguration.get( 4398 mTextView.getContext()); 4399 final int touchSlop = viewConfig.getScaledTouchSlop(); 4400 4401 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 4402 final float deltaX = eventX - mDownPositionX; 4403 final float deltaY = eventY - mDownPositionY; 4404 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4405 4406 if (mGestureStayedInTapRegion) { 4407 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 4408 mGestureStayedInTapRegion = 4409 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 4410 } 4411 if (mHaventMovedEnoughToStartDrag) { 4412 // We don't start dragging until the user has moved enough. 4413 mHaventMovedEnoughToStartDrag = 4414 distanceSquared <= touchSlop * touchSlop; 4415 } 4416 } 4417 4418 if (mStartHandle != null && mStartHandle.isShowing()) { 4419 // Don't do the drag if the handles are showing already. 4420 break; 4421 } 4422 4423 if (mStartOffset != -1) { 4424 if (!mHaventMovedEnoughToStartDrag) { 4425 // Offset the finger by the same vertical offset as the handles. This 4426 // improves visibility of the content being selected by shifting 4427 // the finger below the content. 4428 final float fingerOffset = (mStartHandle != null) 4429 ? mStartHandle.getIdealVerticalOffset() 4430 : touchSlop; 4431 int offset = 4432 mTextView.getOffsetForPosition(eventX, eventY - fingerOffset); 4433 int startOffset; 4434 // Snap to word boundaries. 4435 if (mStartOffset < offset) { 4436 // Expanding with end handle. 4437 offset = getWordEnd(offset); 4438 startOffset = getWordStart(mStartOffset); 4439 } else { 4440 // Expanding with start handle. 4441 offset = getWordStart(offset); 4442 startOffset = getWordEnd(mStartOffset); 4443 } 4444 Selection.setSelection((Spannable) mTextView.getText(), 4445 startOffset, offset); 4446 } 4447 } 4448 break; 4449 4450 case MotionEvent.ACTION_UP: 4451 if (mDragAcceleratorActive) { 4452 // No longer dragging to select text, let the parent intercept events. 4453 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4454 4455 show(); 4456 int startOffset = mTextView.getSelectionStart(); 4457 int endOffset = mTextView.getSelectionEnd(); 4458 4459 // Since we don't let drag handles pass once they're visible, we need to 4460 // make sure the start / end locations are correct because the user *can* 4461 // switch directions during the initial drag. 4462 if (endOffset < startOffset) { 4463 int tmp = endOffset; 4464 endOffset = startOffset; 4465 startOffset = tmp; 4466 4467 // Also update the selection with the right offsets in this case. 4468 Selection.setSelection((Spannable) mTextView.getText(), 4469 startOffset, endOffset); 4470 } 4471 4472 // Need to do this to display the handles. 4473 mStartHandle.showAtLocation(startOffset); 4474 mEndHandle.showAtLocation(endOffset); 4475 4476 // No longer the first dragging motion, reset. 4477 mDragAcceleratorActive = false; 4478 mStartOffset = -1; 4479 } 4480 break; 4481 } 4482 } 4483 4484 /** 4485 * @param event 4486 */ 4487 private void updateMinAndMaxOffsets(MotionEvent event) { 4488 int pointerCount = event.getPointerCount(); 4489 for (int index = 0; index < pointerCount; index++) { 4490 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4491 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4492 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4493 } 4494 } 4495 4496 public int getMinTouchOffset() { 4497 return mMinTouchOffset; 4498 } 4499 4500 public int getMaxTouchOffset() { 4501 return mMaxTouchOffset; 4502 } 4503 4504 public void resetTouchOffsets() { 4505 mMinTouchOffset = mMaxTouchOffset = -1; 4506 mStartOffset = -1; 4507 mDragAcceleratorActive = false; 4508 } 4509 4510 /** 4511 * @return true iff this controller is currently used to move the selection start. 4512 */ 4513 public boolean isSelectionStartDragged() { 4514 return mStartHandle != null && mStartHandle.isDragging(); 4515 } 4516 4517 /** 4518 * @return true if the user is selecting text using the drag accelerator. 4519 */ 4520 public boolean isDragAcceleratorActive() { 4521 return mDragAcceleratorActive; 4522 } 4523 4524 public void onTouchModeChanged(boolean isInTouchMode) { 4525 if (!isInTouchMode) { 4526 hide(); 4527 } 4528 } 4529 4530 @Override 4531 public void onDetached() { 4532 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4533 observer.removeOnTouchModeChangeListener(this); 4534 4535 if (mStartHandle != null) mStartHandle.onDetached(); 4536 if (mEndHandle != null) mEndHandle.onDetached(); 4537 } 4538 } 4539 4540 private class CorrectionHighlighter { 4541 private final Path mPath = new Path(); 4542 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4543 private int mStart, mEnd; 4544 private long mFadingStartTime; 4545 private RectF mTempRectF; 4546 private final static int FADE_OUT_DURATION = 400; 4547 4548 public CorrectionHighlighter() { 4549 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4550 applicationScale); 4551 mPaint.setStyle(Paint.Style.FILL); 4552 } 4553 4554 public void highlight(CorrectionInfo info) { 4555 mStart = info.getOffset(); 4556 mEnd = mStart + info.getNewText().length(); 4557 mFadingStartTime = SystemClock.uptimeMillis(); 4558 4559 if (mStart < 0 || mEnd < 0) { 4560 stopAnimation(); 4561 } 4562 } 4563 4564 public void draw(Canvas canvas, int cursorOffsetVertical) { 4565 if (updatePath() && updatePaint()) { 4566 if (cursorOffsetVertical != 0) { 4567 canvas.translate(0, cursorOffsetVertical); 4568 } 4569 4570 canvas.drawPath(mPath, mPaint); 4571 4572 if (cursorOffsetVertical != 0) { 4573 canvas.translate(0, -cursorOffsetVertical); 4574 } 4575 invalidate(true); // TODO invalidate cursor region only 4576 } else { 4577 stopAnimation(); 4578 invalidate(false); // TODO invalidate cursor region only 4579 } 4580 } 4581 4582 private boolean updatePaint() { 4583 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4584 if (duration > FADE_OUT_DURATION) return false; 4585 4586 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4587 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4588 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4589 ((int) (highlightColorAlpha * coef) << 24); 4590 mPaint.setColor(color); 4591 return true; 4592 } 4593 4594 private boolean updatePath() { 4595 final Layout layout = mTextView.getLayout(); 4596 if (layout == null) return false; 4597 4598 // Update in case text is edited while the animation is run 4599 final int length = mTextView.getText().length(); 4600 int start = Math.min(length, mStart); 4601 int end = Math.min(length, mEnd); 4602 4603 mPath.reset(); 4604 layout.getSelectionPath(start, end, mPath); 4605 return true; 4606 } 4607 4608 private void invalidate(boolean delayed) { 4609 if (mTextView.getLayout() == null) return; 4610 4611 if (mTempRectF == null) mTempRectF = new RectF(); 4612 mPath.computeBounds(mTempRectF, false); 4613 4614 int left = mTextView.getCompoundPaddingLeft(); 4615 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4616 4617 if (delayed) { 4618 mTextView.postInvalidateOnAnimation( 4619 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4620 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4621 } else { 4622 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4623 (int) mTempRectF.right, (int) mTempRectF.bottom); 4624 } 4625 } 4626 4627 private void stopAnimation() { 4628 Editor.this.mCorrectionHighlighter = null; 4629 } 4630 } 4631 4632 private static class ErrorPopup extends PopupWindow { 4633 private boolean mAbove = false; 4634 private final TextView mView; 4635 private int mPopupInlineErrorBackgroundId = 0; 4636 private int mPopupInlineErrorAboveBackgroundId = 0; 4637 4638 ErrorPopup(TextView v, int width, int height) { 4639 super(v, width, height); 4640 mView = v; 4641 // Make sure the TextView has a background set as it will be used the first time it is 4642 // shown and positioned. Initialized with below background, which should have 4643 // dimensions identical to the above version for this to work (and is more likely). 4644 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4645 com.android.internal.R.styleable.Theme_errorMessageBackground); 4646 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4647 } 4648 4649 void fixDirection(boolean above) { 4650 mAbove = above; 4651 4652 if (above) { 4653 mPopupInlineErrorAboveBackgroundId = 4654 getResourceId(mPopupInlineErrorAboveBackgroundId, 4655 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4656 } else { 4657 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4658 com.android.internal.R.styleable.Theme_errorMessageBackground); 4659 } 4660 4661 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4662 mPopupInlineErrorBackgroundId); 4663 } 4664 4665 private int getResourceId(int currentId, int index) { 4666 if (currentId == 0) { 4667 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4668 R.styleable.Theme); 4669 currentId = styledAttributes.getResourceId(index, 0); 4670 styledAttributes.recycle(); 4671 } 4672 return currentId; 4673 } 4674 4675 @Override 4676 public void update(int x, int y, int w, int h, boolean force) { 4677 super.update(x, y, w, h, force); 4678 4679 boolean above = isAboveAnchor(); 4680 if (above != mAbove) { 4681 fixDirection(above); 4682 } 4683 } 4684 } 4685 4686 static class InputContentType { 4687 int imeOptions = EditorInfo.IME_NULL; 4688 String privateImeOptions; 4689 CharSequence imeActionLabel; 4690 int imeActionId; 4691 Bundle extras; 4692 OnEditorActionListener onEditorActionListener; 4693 boolean enterDown; 4694 } 4695 4696 static class InputMethodState { 4697 ExtractedTextRequest mExtractedTextRequest; 4698 final ExtractedText mExtractedText = new ExtractedText(); 4699 int mBatchEditNesting; 4700 boolean mCursorChanged; 4701 boolean mSelectionModeChanged; 4702 boolean mContentChanged; 4703 int mChangedStart, mChangedEnd, mChangedDelta; 4704 } 4705 4706 /** 4707 * @return True iff (start, end) is a valid range within the text. 4708 */ 4709 private static boolean isValidRange(CharSequence text, int start, int end) { 4710 return 0 <= start && start <= end && end <= text.length(); 4711 } 4712 4713 /** 4714 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4715 * text being typed (and hence always returns null from the filter() method). 4716 */ 4717 public static class UndoInputFilter implements InputFilter { 4718 private final Editor mEditor; 4719 4720 // Whether the current filter pass is directly caused by an end-user text edit. 4721 private boolean mIsUserEdit; 4722 4723 // Whether the text field is handling an IME composition. Must be parceled in case the user 4724 // rotates the screen during composition. 4725 private boolean mHasComposition; 4726 4727 public UndoInputFilter(Editor editor) { 4728 mEditor = editor; 4729 } 4730 4731 public void saveInstanceState(Parcel parcel) { 4732 parcel.writeInt(mIsUserEdit ? 1 : 0); 4733 parcel.writeInt(mHasComposition ? 1 : 0); 4734 } 4735 4736 public void restoreInstanceState(Parcel parcel) { 4737 mIsUserEdit = parcel.readInt() != 0; 4738 mHasComposition = parcel.readInt() != 0; 4739 } 4740 4741 /** 4742 * Signals that a user-triggered edit is starting. 4743 */ 4744 public void beginBatchEdit() { 4745 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4746 mIsUserEdit = true; 4747 } 4748 4749 public void endBatchEdit() { 4750 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4751 mIsUserEdit = false; 4752 } 4753 4754 @Override 4755 public CharSequence filter(CharSequence source, int start, int end, 4756 Spanned dest, int dstart, int dend) { 4757 if (DEBUG_UNDO) { 4758 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4759 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4760 } 4761 4762 // Check to see if this edit should be tracked for undo. 4763 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4764 return null; 4765 } 4766 4767 // Check for and handle IME composition edits. 4768 if (handleCompositionEdit(source, start, end, dstart)) { 4769 return null; 4770 } 4771 4772 // Handle keyboard edits. 4773 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4774 return null; 4775 } 4776 4777 /** 4778 * Returns true iff the edit was handled, either because it should be ignored or because 4779 * this function created an undo operation for it. 4780 */ 4781 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4782 // Ignore edits while the user is composing. 4783 if (isComposition(source)) { 4784 mHasComposition = true; 4785 return true; 4786 } 4787 final boolean hadComposition = mHasComposition; 4788 mHasComposition = false; 4789 4790 // Check for the transition out of the composing state. 4791 if (hadComposition) { 4792 // If there was no text the user canceled composition. Ignore the edit. 4793 if (start == end) { 4794 return true; 4795 } 4796 4797 // Otherwise the user inserted the composition. 4798 String newText = TextUtils.substring(source, start, end); 4799 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4800 recordEdit(edit, false /* forceMerge */); 4801 return true; 4802 } 4803 4804 // This was neither a composition event nor a transition out of composing. 4805 return false; 4806 } 4807 4808 private void handleKeyboardEdit(CharSequence source, int start, int end, 4809 Spanned dest, int dstart, int dend) { 4810 // An application may install a TextWatcher to provide additional modifications after 4811 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4812 // string). This results in multiple filter() calls for what the user considers to be 4813 // a single operation. Always undo the whole set of changes in one step. 4814 final boolean forceMerge = isInTextWatcher(); 4815 4816 // Build a new operation with all the information from this edit. 4817 String newText = TextUtils.substring(source, start, end); 4818 String oldText = TextUtils.substring(dest, dstart, dend); 4819 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4820 recordEdit(edit, forceMerge); 4821 } 4822 4823 /** 4824 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4825 * If forceMerge is true then the new edit is always merged. 4826 */ 4827 private void recordEdit(EditOperation edit, boolean forceMerge) { 4828 // Fetch the last edit operation and attempt to merge in the new edit. 4829 final UndoManager um = mEditor.mUndoManager; 4830 um.beginUpdate("Edit text"); 4831 EditOperation lastEdit = um.getLastOperation( 4832 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4833 if (lastEdit == null) { 4834 // Add this as the first edit. 4835 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4836 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4837 } else if (forceMerge) { 4838 // Forced merges take priority because they could be the result of a non-user-edit 4839 // change and this case should not create a new undo operation. 4840 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4841 lastEdit.forceMergeWith(edit); 4842 } else if (!mIsUserEdit) { 4843 // An application directly modified the Editable outside of a text edit. Treat this 4844 // as a new change and don't attempt to merge. 4845 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4846 um.commitState(mEditor.mUndoOwner); 4847 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4848 } else if (lastEdit.mergeWith(edit)) { 4849 // Merge succeeded, nothing else to do. 4850 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4851 } else { 4852 // Could not merge with the last edit, so commit the last edit and add this edit. 4853 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4854 um.commitState(mEditor.mUndoOwner); 4855 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4856 } 4857 um.endUpdate(); 4858 } 4859 4860 private boolean canUndoEdit(CharSequence source, int start, int end, 4861 Spanned dest, int dstart, int dend) { 4862 if (!mEditor.mAllowUndo) { 4863 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4864 return false; 4865 } 4866 4867 if (mEditor.mUndoManager.isInUndo()) { 4868 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4869 return false; 4870 } 4871 4872 // Text filters run before input operations are applied. However, some input operations 4873 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4874 // attempt to undo invalid operations. 4875 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4876 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4877 return false; 4878 } 4879 4880 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4881 // on an input field. Skip no-op changes. 4882 if (start == end && dstart == dend) { 4883 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4884 return false; 4885 } 4886 4887 return true; 4888 } 4889 4890 private boolean isComposition(CharSequence source) { 4891 if (!(source instanceof Spannable)) { 4892 return false; 4893 } 4894 // This is a composition edit if the source has a non-zero-length composing span. 4895 Spannable text = (Spannable) source; 4896 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4897 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4898 return composeBegin < composeEnd; 4899 } 4900 4901 private boolean isInTextWatcher() { 4902 CharSequence text = mEditor.mTextView.getText(); 4903 return (text instanceof SpannableStringBuilder) 4904 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4905 } 4906 } 4907 4908 /** 4909 * An operation to undo a single "edit" to a text view. 4910 */ 4911 public static class EditOperation extends UndoOperation<Editor> { 4912 private static final int TYPE_INSERT = 0; 4913 private static final int TYPE_DELETE = 1; 4914 private static final int TYPE_REPLACE = 2; 4915 4916 private int mType; 4917 private String mOldText; 4918 private int mOldTextStart; 4919 private String mNewText; 4920 private int mNewTextStart; 4921 4922 private int mOldCursorPos; 4923 private int mNewCursorPos; 4924 4925 /** 4926 * Constructs an edit operation from a text input operation on editor that replaces the 4927 * oldText starting at dstart with newText. 4928 */ 4929 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4930 super(editor.mUndoOwner); 4931 mOldText = oldText; 4932 mNewText = newText; 4933 4934 // Determine the type of the edit and store where it occurred. Avoid storing 4935 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4936 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4937 // outside the bounds of the final text). 4938 if (mNewText.length() > 0 && mOldText.length() == 0) { 4939 mType = TYPE_INSERT; 4940 mNewTextStart = dstart; 4941 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4942 mType = TYPE_DELETE; 4943 mOldTextStart = dstart; 4944 } else { 4945 mType = TYPE_REPLACE; 4946 mOldTextStart = mNewTextStart = dstart; 4947 } 4948 4949 // Store cursor data. 4950 mOldCursorPos = editor.mTextView.getSelectionStart(); 4951 mNewCursorPos = dstart + mNewText.length(); 4952 } 4953 4954 public EditOperation(Parcel src, ClassLoader loader) { 4955 super(src, loader); 4956 mType = src.readInt(); 4957 mOldText = src.readString(); 4958 mOldTextStart = src.readInt(); 4959 mNewText = src.readString(); 4960 mNewTextStart = src.readInt(); 4961 mOldCursorPos = src.readInt(); 4962 mNewCursorPos = src.readInt(); 4963 } 4964 4965 @Override 4966 public void writeToParcel(Parcel dest, int flags) { 4967 dest.writeInt(mType); 4968 dest.writeString(mOldText); 4969 dest.writeInt(mOldTextStart); 4970 dest.writeString(mNewText); 4971 dest.writeInt(mNewTextStart); 4972 dest.writeInt(mOldCursorPos); 4973 dest.writeInt(mNewCursorPos); 4974 } 4975 4976 private int getNewTextEnd() { 4977 return mNewTextStart + mNewText.length(); 4978 } 4979 4980 private int getOldTextEnd() { 4981 return mOldTextStart + mOldText.length(); 4982 } 4983 4984 @Override 4985 public void commit() { 4986 } 4987 4988 @Override 4989 public void undo() { 4990 if (DEBUG_UNDO) Log.d(TAG, "undo"); 4991 // Remove the new text and insert the old. 4992 Editor editor = getOwnerData(); 4993 Editable text = (Editable) editor.mTextView.getText(); 4994 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 4995 mOldCursorPos); 4996 } 4997 4998 @Override 4999 public void redo() { 5000 if (DEBUG_UNDO) Log.d(TAG, "redo"); 5001 // Remove the old text and insert the new. 5002 Editor editor = getOwnerData(); 5003 Editable text = (Editable) editor.mTextView.getText(); 5004 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 5005 mNewCursorPos); 5006 } 5007 5008 /** 5009 * Attempts to merge this existing operation with a new edit. 5010 * @param edit The new edit operation. 5011 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 5012 * object unchanged. 5013 */ 5014 private boolean mergeWith(EditOperation edit) { 5015 if (DEBUG_UNDO) { 5016 Log.d(TAG, "mergeWith old " + this); 5017 Log.d(TAG, "mergeWith new " + edit); 5018 } 5019 switch (mType) { 5020 case TYPE_INSERT: 5021 return mergeInsertWith(edit); 5022 case TYPE_DELETE: 5023 return mergeDeleteWith(edit); 5024 case TYPE_REPLACE: 5025 return mergeReplaceWith(edit); 5026 default: 5027 return false; 5028 } 5029 } 5030 5031 private boolean mergeInsertWith(EditOperation edit) { 5032 // Only merge continuous insertions. 5033 if (edit.mType != TYPE_INSERT) { 5034 return false; 5035 } 5036 // Only merge insertions that are contiguous. 5037 if (getNewTextEnd() != edit.mNewTextStart) { 5038 return false; 5039 } 5040 mNewText += edit.mNewText; 5041 mNewCursorPos = edit.mNewCursorPos; 5042 return true; 5043 } 5044 5045 // TODO: Support forward delete. 5046 private boolean mergeDeleteWith(EditOperation edit) { 5047 // Only merge continuous deletes. 5048 if (edit.mType != TYPE_DELETE) { 5049 return false; 5050 } 5051 // Only merge deletions that are contiguous. 5052 if (mOldTextStart != edit.getOldTextEnd()) { 5053 return false; 5054 } 5055 mOldTextStart = edit.mOldTextStart; 5056 mOldText = edit.mOldText + mOldText; 5057 mNewCursorPos = edit.mNewCursorPos; 5058 return true; 5059 } 5060 5061 private boolean mergeReplaceWith(EditOperation edit) { 5062 // Replacements can merge only with adjacent inserts. 5063 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5064 return false; 5065 } 5066 mOldText += edit.mOldText; 5067 mNewText += edit.mNewText; 5068 mNewCursorPos = edit.mNewCursorPos; 5069 return true; 5070 } 5071 5072 /** 5073 * Forcibly creates a single merged edit operation by simulating the entire text 5074 * contents being replaced. 5075 */ 5076 public void forceMergeWith(EditOperation edit) { 5077 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5078 Editor editor = getOwnerData(); 5079 5080 // Copy the text of the current field. 5081 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5082 // but would require two parallel implementations of modifyText() because Editable and 5083 // StringBuilder do not share an interface for replace/delete/insert. 5084 Editable editable = (Editable) editor.mTextView.getText(); 5085 Editable originalText = new SpannableStringBuilder(editable.toString()); 5086 5087 // Roll back the last operation. 5088 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5089 mOldCursorPos); 5090 5091 // Clone the text again and apply the new operation. 5092 Editable finalText = new SpannableStringBuilder(editable.toString()); 5093 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5094 edit.mNewTextStart, edit.mNewCursorPos); 5095 5096 // Convert this operation into a non-mergeable replacement of the entire string. 5097 mType = TYPE_REPLACE; 5098 mNewText = finalText.toString(); 5099 mNewTextStart = 0; 5100 mOldText = originalText.toString(); 5101 mOldTextStart = 0; 5102 mNewCursorPos = edit.mNewCursorPos; 5103 // mOldCursorPos is unchanged. 5104 } 5105 5106 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5107 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5108 // Apply the edit if it is still valid. 5109 if (isValidRange(text, deleteFrom, deleteTo) && 5110 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5111 if (deleteFrom != deleteTo) { 5112 text.delete(deleteFrom, deleteTo); 5113 } 5114 if (newText.length() != 0) { 5115 text.insert(newTextInsertAt, newText); 5116 } 5117 } 5118 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5119 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5120 // TODO: Select all the text that was undone. 5121 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5122 Selection.setSelection(text, newCursorPos); 5123 } 5124 } 5125 5126 private String getTypeString() { 5127 switch (mType) { 5128 case TYPE_INSERT: 5129 return "insert"; 5130 case TYPE_DELETE: 5131 return "delete"; 5132 case TYPE_REPLACE: 5133 return "replace"; 5134 default: 5135 return ""; 5136 } 5137 } 5138 5139 @Override 5140 public String toString() { 5141 return "[mType=" + getTypeString() + ", " + 5142 "mOldText=" + mOldText + ", " + 5143 "mOldTextStart=" + mOldTextStart + ", " + 5144 "mNewText=" + mNewText + ", " + 5145 "mNewTextStart=" + mNewTextStart + ", " + 5146 "mOldCursorPos=" + mOldCursorPos + ", " + 5147 "mNewCursorPos=" + mNewCursorPos + "]"; 5148 } 5149 5150 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5151 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5152 @Override 5153 public EditOperation createFromParcel(Parcel in) { 5154 return new EditOperation(in, null); 5155 } 5156 5157 @Override 5158 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5159 return new EditOperation(in, loader); 5160 } 5161 5162 @Override 5163 public EditOperation[] newArray(int size) { 5164 return new EditOperation[size]; 5165 } 5166 }; 5167 } 5168} 5169