Editor.java revision 95753e2f4b423bd914d6087c1847fc851080cae9
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 stopSelectionActionMode(); 394 mPreserveDetachedSelection = false; 395 mTemporaryDetach = false; 396 } 397 398 private void destroyDisplayListsData() { 399 if (mTextRenderNodes != null) { 400 for (int i = 0; i < mTextRenderNodes.length; i++) { 401 RenderNode displayList = mTextRenderNodes[i] != null 402 ? mTextRenderNodes[i].renderNode : null; 403 if (displayList != null && displayList.isValid()) { 404 displayList.destroyDisplayListData(); 405 } 406 } 407 } 408 } 409 410 private void showError() { 411 if (mTextView.getWindowToken() == null) { 412 mShowErrorAfterAttach = true; 413 return; 414 } 415 416 if (mErrorPopup == null) { 417 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 418 final TextView err = (TextView) inflater.inflate( 419 com.android.internal.R.layout.textview_hint, null); 420 421 final float scale = mTextView.getResources().getDisplayMetrics().density; 422 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 423 mErrorPopup.setFocusable(false); 424 // The user is entering text, so the input method is needed. We 425 // don't want the popup to be displayed on top of it. 426 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 427 } 428 429 TextView tv = (TextView) mErrorPopup.getContentView(); 430 chooseSize(mErrorPopup, mError, tv); 431 tv.setText(mError); 432 433 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 434 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 435 } 436 437 public void setError(CharSequence error, Drawable icon) { 438 mError = TextUtils.stringOrSpannedString(error); 439 mErrorWasChanged = true; 440 441 if (mError == null) { 442 setErrorIcon(null); 443 if (mErrorPopup != null) { 444 if (mErrorPopup.isShowing()) { 445 mErrorPopup.dismiss(); 446 } 447 448 mErrorPopup = null; 449 } 450 mShowErrorAfterAttach = false; 451 } else { 452 setErrorIcon(icon); 453 if (mTextView.isFocused()) { 454 showError(); 455 } 456 } 457 } 458 459 private void setErrorIcon(Drawable icon) { 460 Drawables dr = mTextView.mDrawables; 461 if (dr == null) { 462 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 463 } 464 dr.setErrorDrawable(icon, mTextView); 465 466 mTextView.resetResolvedDrawables(); 467 mTextView.invalidate(); 468 mTextView.requestLayout(); 469 } 470 471 private void hideError() { 472 if (mErrorPopup != null) { 473 if (mErrorPopup.isShowing()) { 474 mErrorPopup.dismiss(); 475 } 476 } 477 478 mShowErrorAfterAttach = false; 479 } 480 481 /** 482 * Returns the X offset to make the pointy top of the error point 483 * at the middle of the error icon. 484 */ 485 private int getErrorX() { 486 /* 487 * The "25" is the distance between the point and the right edge 488 * of the background 489 */ 490 final float scale = mTextView.getResources().getDisplayMetrics().density; 491 492 final Drawables dr = mTextView.mDrawables; 493 494 final int layoutDirection = mTextView.getLayoutDirection(); 495 int errorX; 496 int offset; 497 switch (layoutDirection) { 498 default: 499 case View.LAYOUT_DIRECTION_LTR: 500 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 501 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 502 mTextView.getPaddingRight() + offset; 503 break; 504 case View.LAYOUT_DIRECTION_RTL: 505 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 506 errorX = mTextView.getPaddingLeft() + offset; 507 break; 508 } 509 return errorX; 510 } 511 512 /** 513 * Returns the Y offset to make the pointy top of the error point 514 * at the bottom of the error icon. 515 */ 516 private int getErrorY() { 517 /* 518 * Compound, not extended, because the icon is not clipped 519 * if the text height is smaller. 520 */ 521 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 522 int vspace = mTextView.getBottom() - mTextView.getTop() - 523 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 524 525 final Drawables dr = mTextView.mDrawables; 526 527 final int layoutDirection = mTextView.getLayoutDirection(); 528 int height; 529 switch (layoutDirection) { 530 default: 531 case View.LAYOUT_DIRECTION_LTR: 532 height = (dr != null ? dr.mDrawableHeightRight : 0); 533 break; 534 case View.LAYOUT_DIRECTION_RTL: 535 height = (dr != null ? dr.mDrawableHeightLeft : 0); 536 break; 537 } 538 539 int icontop = compoundPaddingTop + (vspace - height) / 2; 540 541 /* 542 * The "2" is the distance between the point and the top edge 543 * of the background. 544 */ 545 final float scale = mTextView.getResources().getDisplayMetrics().density; 546 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 547 } 548 549 void createInputContentTypeIfNeeded() { 550 if (mInputContentType == null) { 551 mInputContentType = new InputContentType(); 552 } 553 } 554 555 void createInputMethodStateIfNeeded() { 556 if (mInputMethodState == null) { 557 mInputMethodState = new InputMethodState(); 558 } 559 } 560 561 boolean isCursorVisible() { 562 // The default value is true, even when there is no associated Editor 563 return mCursorVisible && mTextView.isTextEditable(); 564 } 565 566 void prepareCursorControllers() { 567 boolean windowSupportsHandles = false; 568 569 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 570 if (params instanceof WindowManager.LayoutParams) { 571 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 572 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 573 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 574 } 575 576 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 577 mInsertionControllerEnabled = enabled && isCursorVisible(); 578 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 579 580 if (!mInsertionControllerEnabled) { 581 hideInsertionPointCursorController(); 582 if (mInsertionPointCursorController != null) { 583 mInsertionPointCursorController.onDetached(); 584 mInsertionPointCursorController = null; 585 } 586 } 587 588 if (!mSelectionControllerEnabled) { 589 stopSelectionActionMode(); 590 if (mSelectionModifierCursorController != null) { 591 mSelectionModifierCursorController.onDetached(); 592 mSelectionModifierCursorController = null; 593 } 594 } 595 } 596 597 void hideInsertionPointCursorController() { 598 if (mInsertionPointCursorController != null) { 599 mInsertionPointCursorController.hide(); 600 } 601 } 602 603 /** 604 * Hides the insertion controller and stops text selection mode, hiding the selection controller 605 */ 606 void hideControllers() { 607 hideCursorControllers(); 608 hideSpanControllers(); 609 } 610 611 private void hideSpanControllers() { 612 if (mSpanController != null) { 613 mSpanController.hide(); 614 } 615 } 616 617 private void hideCursorControllers() { 618 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 619 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 620 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 621 // to distinguish one from the other. 622 if (mSuggestionsPopupWindow != null && ((mTextView instanceof ExtractEditText) || 623 !mSuggestionsPopupWindow.isShowingUp())) { 624 // Should be done before hide insertion point controller since it triggers a show of it 625 mSuggestionsPopupWindow.hide(); 626 } 627 hideInsertionPointCursorController(); 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 stopSelectionActionMode(); 1105 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1106 } else { 1107 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1108 hideControllers(); 1109 stopSelectionActionMode(); 1110 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1111 downgradeEasyCorrectionSpans(); 1112 } 1113 1114 // No need to create the controller 1115 if (mSelectionModifierCursorController != null) { 1116 mSelectionModifierCursorController.resetTouchOffsets(); 1117 } 1118 } 1119 } 1120 1121 /** 1122 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1123 * span. 1124 */ 1125 private void downgradeEasyCorrectionSpans() { 1126 CharSequence text = mTextView.getText(); 1127 if (text instanceof Spannable) { 1128 Spannable spannable = (Spannable) text; 1129 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1130 spannable.length(), SuggestionSpan.class); 1131 for (int i = 0; i < suggestionSpans.length; i++) { 1132 int flags = suggestionSpans[i].getFlags(); 1133 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1134 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1135 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1136 suggestionSpans[i].setFlags(flags); 1137 } 1138 } 1139 } 1140 } 1141 1142 void sendOnTextChanged(int start, int after) { 1143 updateSpellCheckSpans(start, start + after, false); 1144 1145 // Flip flag to indicate the word iterator needs to have the text reset. 1146 mUpdateWordIteratorText = true; 1147 1148 // Hide the controllers as soon as text is modified (typing, procedural...) 1149 // We do not hide the span controllers, since they can be added when a new text is 1150 // inserted into the text view (voice IME). 1151 hideCursorControllers(); 1152 stopSelectionActionMode(); 1153 } 1154 1155 private int getLastTapPosition() { 1156 // No need to create the controller at that point, no last tap position saved 1157 if (mSelectionModifierCursorController != null) { 1158 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1159 if (lastTapPosition >= 0) { 1160 // Safety check, should not be possible. 1161 if (lastTapPosition > mTextView.getText().length()) { 1162 lastTapPosition = mTextView.getText().length(); 1163 } 1164 return lastTapPosition; 1165 } 1166 } 1167 1168 return -1; 1169 } 1170 1171 void onWindowFocusChanged(boolean hasWindowFocus) { 1172 if (hasWindowFocus) { 1173 if (mBlink != null) { 1174 mBlink.uncancel(); 1175 makeBlink(); 1176 } 1177 } else { 1178 if (mBlink != null) { 1179 mBlink.cancel(); 1180 } 1181 if (mInputContentType != null) { 1182 mInputContentType.enterDown = false; 1183 } 1184 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1185 hideControllers(); 1186 if (mSuggestionsPopupWindow != null) { 1187 mSuggestionsPopupWindow.onParentLostFocus(); 1188 } 1189 1190 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1191 ensureEndedBatchEdit(); 1192 } 1193 } 1194 1195 void onTouchEvent(MotionEvent event) { 1196 updateFloatingToolbarVisibility(event); 1197 1198 if (hasSelectionController()) { 1199 getSelectionController().onTouchEvent(event); 1200 } 1201 1202 if (mShowSuggestionRunnable != null) { 1203 mTextView.removeCallbacks(mShowSuggestionRunnable); 1204 mShowSuggestionRunnable = null; 1205 } 1206 1207 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1208 mLastDownPositionX = event.getX(); 1209 mLastDownPositionY = event.getY(); 1210 1211 // Reset this state; it will be re-set if super.onTouchEvent 1212 // causes focus to move to the view. 1213 mTouchFocusSelected = false; 1214 mIgnoreActionUpEvent = false; 1215 } 1216 } 1217 1218 private void updateFloatingToolbarVisibility(MotionEvent event) { 1219 if (mSelectionActionMode != null) { 1220 switch (event.getActionMasked()) { 1221 case MotionEvent.ACTION_MOVE: 1222 hideFloatingToolbar(); 1223 break; 1224 case MotionEvent.ACTION_UP: // fall through 1225 case MotionEvent.ACTION_CANCEL: 1226 showFloatingToolbar(); 1227 } 1228 } 1229 } 1230 1231 private void hideFloatingToolbar() { 1232 if (mSelectionActionMode != null) { 1233 mTextView.removeCallbacks(mShowFloatingToolbar); 1234 // Delay the "hide" a little bit just in case a "show" will happen almost immediately. 1235 mTextView.postDelayed(mHideFloatingToolbar, 100); 1236 } 1237 } 1238 1239 private void showFloatingToolbar() { 1240 if (mSelectionActionMode != null) { 1241 mTextView.removeCallbacks(mHideFloatingToolbar); 1242 // Delay "show" so it doesn't interfere with click confirmations 1243 // or double-clicks that could "dismiss" the floating toolbar. 1244 int delay = ViewConfiguration.getDoubleTapTimeout(); 1245 mTextView.postDelayed(mShowFloatingToolbar, delay); 1246 } 1247 } 1248 1249 public void beginBatchEdit() { 1250 mInBatchEditControllers = true; 1251 final InputMethodState ims = mInputMethodState; 1252 if (ims != null) { 1253 int nesting = ++ims.mBatchEditNesting; 1254 if (nesting == 1) { 1255 ims.mCursorChanged = false; 1256 ims.mChangedDelta = 0; 1257 if (ims.mContentChanged) { 1258 // We already have a pending change from somewhere else, 1259 // so turn this into a full update. 1260 ims.mChangedStart = 0; 1261 ims.mChangedEnd = mTextView.getText().length(); 1262 } else { 1263 ims.mChangedStart = EXTRACT_UNKNOWN; 1264 ims.mChangedEnd = EXTRACT_UNKNOWN; 1265 ims.mContentChanged = false; 1266 } 1267 mUndoInputFilter.beginBatchEdit(); 1268 mTextView.onBeginBatchEdit(); 1269 } 1270 } 1271 } 1272 1273 public void endBatchEdit() { 1274 mInBatchEditControllers = false; 1275 final InputMethodState ims = mInputMethodState; 1276 if (ims != null) { 1277 int nesting = --ims.mBatchEditNesting; 1278 if (nesting == 0) { 1279 finishBatchEdit(ims); 1280 } 1281 } 1282 } 1283 1284 void ensureEndedBatchEdit() { 1285 final InputMethodState ims = mInputMethodState; 1286 if (ims != null && ims.mBatchEditNesting != 0) { 1287 ims.mBatchEditNesting = 0; 1288 finishBatchEdit(ims); 1289 } 1290 } 1291 1292 void finishBatchEdit(final InputMethodState ims) { 1293 mTextView.onEndBatchEdit(); 1294 mUndoInputFilter.endBatchEdit(); 1295 1296 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1297 mTextView.updateAfterEdit(); 1298 reportExtractedText(); 1299 } else if (ims.mCursorChanged) { 1300 // Cheesy way to get us to report the current cursor location. 1301 mTextView.invalidateCursor(); 1302 } 1303 // sendUpdateSelection knows to avoid sending if the selection did 1304 // not actually change. 1305 sendUpdateSelection(); 1306 } 1307 1308 static final int EXTRACT_NOTHING = -2; 1309 static final int EXTRACT_UNKNOWN = -1; 1310 1311 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1312 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1313 EXTRACT_UNKNOWN, outText); 1314 } 1315 1316 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1317 int partialStartOffset, int partialEndOffset, int delta, 1318 @Nullable ExtractedText outText) { 1319 if (request == null || outText == null) { 1320 return false; 1321 } 1322 1323 final CharSequence content = mTextView.getText(); 1324 if (content == null) { 1325 return false; 1326 } 1327 1328 if (partialStartOffset != EXTRACT_NOTHING) { 1329 final int N = content.length(); 1330 if (partialStartOffset < 0) { 1331 outText.partialStartOffset = outText.partialEndOffset = -1; 1332 partialStartOffset = 0; 1333 partialEndOffset = N; 1334 } else { 1335 // Now use the delta to determine the actual amount of text 1336 // we need. 1337 partialEndOffset += delta; 1338 // Adjust offsets to ensure we contain full spans. 1339 if (content instanceof Spanned) { 1340 Spanned spanned = (Spanned)content; 1341 Object[] spans = spanned.getSpans(partialStartOffset, 1342 partialEndOffset, ParcelableSpan.class); 1343 int i = spans.length; 1344 while (i > 0) { 1345 i--; 1346 int j = spanned.getSpanStart(spans[i]); 1347 if (j < partialStartOffset) partialStartOffset = j; 1348 j = spanned.getSpanEnd(spans[i]); 1349 if (j > partialEndOffset) partialEndOffset = j; 1350 } 1351 } 1352 outText.partialStartOffset = partialStartOffset; 1353 outText.partialEndOffset = partialEndOffset - delta; 1354 1355 if (partialStartOffset > N) { 1356 partialStartOffset = N; 1357 } else if (partialStartOffset < 0) { 1358 partialStartOffset = 0; 1359 } 1360 if (partialEndOffset > N) { 1361 partialEndOffset = N; 1362 } else if (partialEndOffset < 0) { 1363 partialEndOffset = 0; 1364 } 1365 } 1366 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1367 outText.text = content.subSequence(partialStartOffset, 1368 partialEndOffset); 1369 } else { 1370 outText.text = TextUtils.substring(content, partialStartOffset, 1371 partialEndOffset); 1372 } 1373 } else { 1374 outText.partialStartOffset = 0; 1375 outText.partialEndOffset = 0; 1376 outText.text = ""; 1377 } 1378 outText.flags = 0; 1379 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1380 outText.flags |= ExtractedText.FLAG_SELECTING; 1381 } 1382 if (mTextView.isSingleLine()) { 1383 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1384 } 1385 outText.startOffset = 0; 1386 outText.selectionStart = mTextView.getSelectionStart(); 1387 outText.selectionEnd = mTextView.getSelectionEnd(); 1388 return true; 1389 } 1390 1391 boolean reportExtractedText() { 1392 final Editor.InputMethodState ims = mInputMethodState; 1393 if (ims != null) { 1394 final boolean contentChanged = ims.mContentChanged; 1395 if (contentChanged || ims.mSelectionModeChanged) { 1396 ims.mContentChanged = false; 1397 ims.mSelectionModeChanged = false; 1398 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1399 if (req != null) { 1400 InputMethodManager imm = InputMethodManager.peekInstance(); 1401 if (imm != null) { 1402 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1403 "Retrieving extracted start=" + ims.mChangedStart + 1404 " end=" + ims.mChangedEnd + 1405 " delta=" + ims.mChangedDelta); 1406 if (ims.mChangedStart < 0 && !contentChanged) { 1407 ims.mChangedStart = EXTRACT_NOTHING; 1408 } 1409 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1410 ims.mChangedDelta, ims.mExtractedText)) { 1411 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1412 "Reporting extracted start=" + 1413 ims.mExtractedText.partialStartOffset + 1414 " end=" + ims.mExtractedText.partialEndOffset + 1415 ": " + ims.mExtractedText.text); 1416 1417 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1418 ims.mChangedStart = EXTRACT_UNKNOWN; 1419 ims.mChangedEnd = EXTRACT_UNKNOWN; 1420 ims.mChangedDelta = 0; 1421 ims.mContentChanged = false; 1422 return true; 1423 } 1424 } 1425 } 1426 } 1427 } 1428 return false; 1429 } 1430 1431 private void sendUpdateSelection() { 1432 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1433 final InputMethodManager imm = InputMethodManager.peekInstance(); 1434 if (null != imm) { 1435 final int selectionStart = mTextView.getSelectionStart(); 1436 final int selectionEnd = mTextView.getSelectionEnd(); 1437 int candStart = -1; 1438 int candEnd = -1; 1439 if (mTextView.getText() instanceof Spannable) { 1440 final Spannable sp = (Spannable) mTextView.getText(); 1441 candStart = EditableInputConnection.getComposingSpanStart(sp); 1442 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1443 } 1444 // InputMethodManager#updateSelection skips sending the message if 1445 // none of the parameters have changed since the last time we called it. 1446 imm.updateSelection(mTextView, 1447 selectionStart, selectionEnd, candStart, candEnd); 1448 } 1449 } 1450 } 1451 1452 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1453 int cursorOffsetVertical) { 1454 final int selectionStart = mTextView.getSelectionStart(); 1455 final int selectionEnd = mTextView.getSelectionEnd(); 1456 1457 final InputMethodState ims = mInputMethodState; 1458 if (ims != null && ims.mBatchEditNesting == 0) { 1459 InputMethodManager imm = InputMethodManager.peekInstance(); 1460 if (imm != null) { 1461 if (imm.isActive(mTextView)) { 1462 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1463 // We are in extract mode and the content has changed 1464 // in some way... just report complete new text to the 1465 // input method. 1466 reportExtractedText(); 1467 } 1468 } 1469 } 1470 } 1471 1472 if (mCorrectionHighlighter != null) { 1473 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1474 } 1475 1476 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1477 drawCursor(canvas, cursorOffsetVertical); 1478 // Rely on the drawable entirely, do not draw the cursor line. 1479 // Has to be done after the IMM related code above which relies on the highlight. 1480 highlight = null; 1481 } 1482 1483 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1484 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1485 cursorOffsetVertical); 1486 } else { 1487 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1488 } 1489 } 1490 1491 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1492 Paint highlightPaint, int cursorOffsetVertical) { 1493 final long lineRange = layout.getLineRangeForDraw(canvas); 1494 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1495 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1496 if (lastLine < 0) return; 1497 1498 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1499 firstLine, lastLine); 1500 1501 if (layout instanceof DynamicLayout) { 1502 if (mTextRenderNodes == null) { 1503 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1504 } 1505 1506 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1507 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1508 int[] blockIndices = dynamicLayout.getBlockIndices(); 1509 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1510 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1511 1512 int endOfPreviousBlock = -1; 1513 int searchStartIndex = 0; 1514 for (int i = 0; i < numberOfBlocks; i++) { 1515 int blockEndLine = blockEndLines[i]; 1516 int blockIndex = blockIndices[i]; 1517 1518 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1519 if (blockIsInvalid) { 1520 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1521 searchStartIndex); 1522 // Note how dynamic layout's internal block indices get updated from Editor 1523 blockIndices[i] = blockIndex; 1524 if (mTextRenderNodes[blockIndex] != null) { 1525 mTextRenderNodes[blockIndex].isDirty = true; 1526 } 1527 searchStartIndex = blockIndex + 1; 1528 } 1529 1530 if (mTextRenderNodes[blockIndex] == null) { 1531 mTextRenderNodes[blockIndex] = 1532 new TextRenderNode("Text " + blockIndex); 1533 } 1534 1535 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1536 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1537 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1538 final int blockBeginLine = endOfPreviousBlock + 1; 1539 final int top = layout.getLineTop(blockBeginLine); 1540 final int bottom = layout.getLineBottom(blockEndLine); 1541 int left = 0; 1542 int right = mTextView.getWidth(); 1543 if (mTextView.getHorizontallyScrolling()) { 1544 float min = Float.MAX_VALUE; 1545 float max = Float.MIN_VALUE; 1546 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1547 min = Math.min(min, layout.getLineLeft(line)); 1548 max = Math.max(max, layout.getLineRight(line)); 1549 } 1550 left = (int) min; 1551 right = (int) (max + 0.5f); 1552 } 1553 1554 // Rebuild display list if it is invalid 1555 if (blockDisplayListIsInvalid) { 1556 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1557 right - left, bottom - top); 1558 try { 1559 // drawText is always relative to TextView's origin, this translation 1560 // brings this range of text back to the top left corner of the viewport 1561 displayListCanvas.translate(-left, -top); 1562 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1563 mTextRenderNodes[blockIndex].isDirty = false; 1564 // No need to untranslate, previous context is popped after 1565 // drawDisplayList 1566 } finally { 1567 blockDisplayList.end(displayListCanvas); 1568 // Same as drawDisplayList below, handled by our TextView's parent 1569 blockDisplayList.setClipToBounds(false); 1570 } 1571 } 1572 1573 // Valid disply list whose index is >= indexFirstChangedBlock 1574 // only needs to update its drawing location. 1575 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1576 } 1577 1578 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1579 1580 endOfPreviousBlock = blockEndLine; 1581 } 1582 1583 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1584 } else { 1585 // Boring layout is used for empty and hint text 1586 layout.drawText(canvas, firstLine, lastLine); 1587 } 1588 } 1589 1590 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1591 int searchStartIndex) { 1592 int length = mTextRenderNodes.length; 1593 for (int i = searchStartIndex; i < length; i++) { 1594 boolean blockIndexFound = false; 1595 for (int j = 0; j < numberOfBlocks; j++) { 1596 if (blockIndices[j] == i) { 1597 blockIndexFound = true; 1598 break; 1599 } 1600 } 1601 if (blockIndexFound) continue; 1602 return i; 1603 } 1604 1605 // No available index found, the pool has to grow 1606 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1607 return length; 1608 } 1609 1610 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1611 final boolean translate = cursorOffsetVertical != 0; 1612 if (translate) canvas.translate(0, cursorOffsetVertical); 1613 for (int i = 0; i < mCursorCount; i++) { 1614 mCursorDrawable[i].draw(canvas); 1615 } 1616 if (translate) canvas.translate(0, -cursorOffsetVertical); 1617 } 1618 1619 /** 1620 * Invalidates all the sub-display lists that overlap the specified character range 1621 */ 1622 void invalidateTextDisplayList(Layout layout, int start, int end) { 1623 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1624 final int firstLine = layout.getLineForOffset(start); 1625 final int lastLine = layout.getLineForOffset(end); 1626 1627 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1628 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1629 int[] blockIndices = dynamicLayout.getBlockIndices(); 1630 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1631 1632 int i = 0; 1633 // Skip the blocks before firstLine 1634 while (i < numberOfBlocks) { 1635 if (blockEndLines[i] >= firstLine) break; 1636 i++; 1637 } 1638 1639 // Invalidate all subsequent blocks until lastLine is passed 1640 while (i < numberOfBlocks) { 1641 final int blockIndex = blockIndices[i]; 1642 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1643 mTextRenderNodes[blockIndex].isDirty = true; 1644 } 1645 if (blockEndLines[i] >= lastLine) break; 1646 i++; 1647 } 1648 } 1649 } 1650 1651 void invalidateTextDisplayList() { 1652 if (mTextRenderNodes != null) { 1653 for (int i = 0; i < mTextRenderNodes.length; i++) { 1654 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1655 } 1656 } 1657 } 1658 1659 void updateCursorsPositions() { 1660 if (mTextView.mCursorDrawableRes == 0) { 1661 mCursorCount = 0; 1662 return; 1663 } 1664 1665 Layout layout = mTextView.getLayout(); 1666 Layout hintLayout = mTextView.getHintLayout(); 1667 final int offset = mTextView.getSelectionStart(); 1668 final int line = layout.getLineForOffset(offset); 1669 final int top = layout.getLineTop(line); 1670 final int bottom = layout.getLineTop(line + 1); 1671 1672 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1673 1674 int middle = bottom; 1675 if (mCursorCount == 2) { 1676 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1677 middle = (top + bottom) >> 1; 1678 } 1679 1680 boolean clamped = layout.shouldClampCursor(line); 1681 updateCursorPosition(0, top, middle, 1682 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1683 1684 if (mCursorCount == 2) { 1685 updateCursorPosition(1, middle, bottom, 1686 layout.getSecondaryHorizontal(offset, clamped)); 1687 } 1688 } 1689 1690 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1691 boolean clamped) { 1692 if (TextUtils.isEmpty(layout.getText()) && 1693 hintLayout != null && 1694 !TextUtils.isEmpty(hintLayout.getText())) { 1695 return hintLayout.getPrimaryHorizontal(offset, clamped); 1696 } else { 1697 return layout.getPrimaryHorizontal(offset, clamped); 1698 } 1699 } 1700 1701 /** 1702 * @return true if the selection mode was actually started. 1703 */ 1704 private boolean startSelectionActionModeWithoutSelection() { 1705 if (extractedTextModeWillBeStarted()) { 1706 // Cancel the single tap delayed runnable. 1707 if (mSelectionModeWithoutSelectionRunnable != null) { 1708 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 1709 } 1710 1711 return false; 1712 } 1713 1714 if (mSelectionActionMode != null) { 1715 // Selection action mode is already started 1716 // TODO: revisit invocations to minimize this case. 1717 mSelectionActionMode.invalidate(); 1718 return false; 1719 } 1720 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1721 mSelectionActionMode = mTextView.startActionMode( 1722 actionModeCallback, ActionMode.TYPE_FLOATING); 1723 return mSelectionActionMode != null; 1724 } 1725 1726 /** 1727 * Starts a Selection Action Mode with the current selection and enters drag mode. This should 1728 * be used whenever the mode is started from a touch event. 1729 * 1730 * @return true if the selection mode was actually started. 1731 */ 1732 private boolean startSelectionActionModeWithSelectionAndStartDrag() { 1733 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1734 if (selectionStarted) { 1735 getSelectionController().enterDrag(); 1736 } 1737 return selectionStarted; 1738 } 1739 1740 /** 1741 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1742 * are shown. This should be used when the mode is started from a non-touch event. 1743 * 1744 * @return true if the selection mode was actually started. 1745 */ 1746 boolean startSelectionActionModeWithSelection() { 1747 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1748 if (selectionStarted) { 1749 getSelectionController().show(); 1750 } 1751 return selectionStarted; 1752 } 1753 1754 private boolean startSelectionActionModeWithSelectionInternal() { 1755 if (extractedTextModeWillBeStarted()) { 1756 // Cancel the single tap delayed runnable. 1757 if (mSelectionModeWithoutSelectionRunnable != null) { 1758 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 1759 } 1760 1761 return false; 1762 } 1763 1764 if (mSelectionActionMode != null) { 1765 // Selection action mode is already started 1766 mSelectionActionMode.invalidate(); 1767 return false; 1768 } 1769 1770 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1771 Log.w(TextView.LOG_TAG, 1772 "TextView does not support text selection. Action mode cancelled."); 1773 return false; 1774 } 1775 1776 if (!mTextView.hasSelection()) { 1777 // There may already be a selection on device rotation 1778 if (!selectCurrentWord()) { 1779 // No word found under cursor or text selection not permitted. 1780 return false; 1781 } 1782 } 1783 1784 boolean willExtract = extractedTextModeWillBeStarted(); 1785 1786 // Do not start the action mode when extracted text will show up full screen, which would 1787 // immediately hide the newly created action bar and would be visually distracting. 1788 if (!willExtract) { 1789 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1790 mSelectionActionMode = mTextView.startActionMode( 1791 actionModeCallback, ActionMode.TYPE_FLOATING); 1792 } 1793 1794 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1795 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1796 // Show the IME to be able to replace text, except when selecting non editable text. 1797 final InputMethodManager imm = InputMethodManager.peekInstance(); 1798 if (imm != null) { 1799 imm.showSoftInput(mTextView, 0, null); 1800 } 1801 } 1802 return selectionStarted; 1803 } 1804 1805 private boolean extractedTextModeWillBeStarted() { 1806 if (!(mTextView instanceof ExtractEditText)) { 1807 final InputMethodManager imm = InputMethodManager.peekInstance(); 1808 return imm != null && imm.isFullscreenMode(); 1809 } 1810 return false; 1811 } 1812 1813 /** 1814 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1815 * the current cursor position or selection range. This method is consistent with the 1816 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1817 */ 1818 private boolean shouldOfferToShowSuggestions() { 1819 CharSequence text = mTextView.getText(); 1820 if (!(text instanceof Spannable)) return false; 1821 1822 final Spannable spannable = (Spannable) text; 1823 final int selectionStart = mTextView.getSelectionStart(); 1824 final int selectionEnd = mTextView.getSelectionEnd(); 1825 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1826 SuggestionSpan.class); 1827 if (suggestionSpans.length == 0) { 1828 return false; 1829 } 1830 if (selectionStart == selectionEnd) { 1831 // Spans overlap the cursor. 1832 return true; 1833 } 1834 int minSpanStart = mTextView.getText().length(); 1835 int maxSpanEnd = 0; 1836 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1837 int unionOfSpansCoveringSelectionStartEnd = 0; 1838 for (int i = 0; i < suggestionSpans.length; i++) { 1839 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1840 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1841 minSpanStart = Math.min(minSpanStart, spanStart); 1842 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1843 if (selectionStart < spanStart || selectionStart > spanEnd) { 1844 // The span doesn't cover the current selection start point. 1845 continue; 1846 } 1847 unionOfSpansCoveringSelectionStartStart = 1848 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1849 unionOfSpansCoveringSelectionStartEnd = 1850 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1851 } 1852 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1853 // No spans cover the selection start point. 1854 return false; 1855 } 1856 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1857 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1858 // There is a span that is not covered by the union. In this case, we soouldn't offer 1859 // to show suggestions as it's confusing. 1860 return false; 1861 } 1862 return true; 1863 } 1864 1865 /** 1866 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1867 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1868 */ 1869 private boolean isCursorInsideEasyCorrectionSpan() { 1870 Spannable spannable = (Spannable) mTextView.getText(); 1871 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1872 mTextView.getSelectionEnd(), SuggestionSpan.class); 1873 for (int i = 0; i < suggestionSpans.length; i++) { 1874 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1875 return true; 1876 } 1877 } 1878 return false; 1879 } 1880 1881 void onTouchUpEvent(MotionEvent event) { 1882 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1883 hideControllers(); 1884 stopSelectionActionMode(); 1885 CharSequence text = mTextView.getText(); 1886 if (!selectAllGotFocus && text.length() > 0) { 1887 // Move cursor 1888 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1889 Selection.setSelection((Spannable) text, offset); 1890 if (mSpellChecker != null) { 1891 // When the cursor moves, the word that was typed may need spell check 1892 mSpellChecker.onSelectionChanged(); 1893 } 1894 1895 if (!extractedTextModeWillBeStarted()) { 1896 if (isCursorInsideEasyCorrectionSpan()) { 1897 // Cancel the single tap delayed runnable. 1898 if (mSelectionModeWithoutSelectionRunnable != null) { 1899 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 1900 } 1901 1902 mShowSuggestionRunnable = new Runnable() { 1903 public void run() { 1904 showSuggestions(); 1905 } 1906 }; 1907 // removeCallbacks is performed on every touch 1908 mTextView.postDelayed(mShowSuggestionRunnable, 1909 ViewConfiguration.getDoubleTapTimeout()); 1910 } else if (hasInsertionController()) { 1911 getInsertionController().show(); 1912 } 1913 } 1914 } 1915 } 1916 1917 protected void stopSelectionActionMode() { 1918 if (mSelectionActionMode != null) { 1919 // This will hide the mSelectionModifierCursorController 1920 mSelectionActionMode.finish(); 1921 } 1922 } 1923 1924 /** 1925 * @return True if this view supports insertion handles. 1926 */ 1927 boolean hasInsertionController() { 1928 return mInsertionControllerEnabled; 1929 } 1930 1931 /** 1932 * @return True if this view supports selection handles. 1933 */ 1934 boolean hasSelectionController() { 1935 return mSelectionControllerEnabled; 1936 } 1937 1938 InsertionPointCursorController getInsertionController() { 1939 if (!mInsertionControllerEnabled) { 1940 return null; 1941 } 1942 1943 if (mInsertionPointCursorController == null) { 1944 mInsertionPointCursorController = new InsertionPointCursorController(); 1945 1946 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1947 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1948 } 1949 1950 return mInsertionPointCursorController; 1951 } 1952 1953 SelectionModifierCursorController getSelectionController() { 1954 if (!mSelectionControllerEnabled) { 1955 return null; 1956 } 1957 1958 if (mSelectionModifierCursorController == null) { 1959 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1960 1961 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1962 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1963 } 1964 1965 return mSelectionModifierCursorController; 1966 } 1967 1968 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1969 if (mCursorDrawable[cursorIndex] == null) 1970 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1971 mTextView.mCursorDrawableRes); 1972 1973 if (mTempRect == null) mTempRect = new Rect(); 1974 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1975 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1976 horizontal = Math.max(0.5f, horizontal - 0.5f); 1977 final int left = (int) (horizontal) - mTempRect.left; 1978 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1979 bottom + mTempRect.bottom); 1980 } 1981 1982 /** 1983 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1984 * a dictionary) from the current input method, provided by it calling 1985 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 1986 * implementation flashes the background of the corrected word to provide feedback to the user. 1987 * 1988 * @param info The auto correct info about the text that was corrected. 1989 */ 1990 public void onCommitCorrection(CorrectionInfo info) { 1991 if (mCorrectionHighlighter == null) { 1992 mCorrectionHighlighter = new CorrectionHighlighter(); 1993 } else { 1994 mCorrectionHighlighter.invalidate(false); 1995 } 1996 1997 mCorrectionHighlighter.highlight(info); 1998 } 1999 2000 void showSuggestions() { 2001 if (mSuggestionsPopupWindow == null) { 2002 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 2003 } 2004 hideControllers(); 2005 stopSelectionActionMode(); 2006 mSuggestionsPopupWindow.show(); 2007 } 2008 2009 void onScrollChanged() { 2010 if (mPositionListener != null) { 2011 mPositionListener.onScrollChanged(); 2012 } 2013 if (mSelectionActionMode != null) { 2014 mSelectionActionMode.invalidateContentRect(); 2015 } 2016 } 2017 2018 /** 2019 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2020 */ 2021 private boolean shouldBlink() { 2022 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2023 2024 final int start = mTextView.getSelectionStart(); 2025 if (start < 0) return false; 2026 2027 final int end = mTextView.getSelectionEnd(); 2028 if (end < 0) return false; 2029 2030 return start == end; 2031 } 2032 2033 void makeBlink() { 2034 if (shouldBlink()) { 2035 mShowCursor = SystemClock.uptimeMillis(); 2036 if (mBlink == null) mBlink = new Blink(); 2037 mBlink.removeCallbacks(mBlink); 2038 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 2039 } else { 2040 if (mBlink != null) mBlink.removeCallbacks(mBlink); 2041 } 2042 } 2043 2044 private class Blink extends Handler implements Runnable { 2045 private boolean mCancelled; 2046 2047 public void run() { 2048 if (mCancelled) { 2049 return; 2050 } 2051 2052 removeCallbacks(Blink.this); 2053 2054 if (shouldBlink()) { 2055 if (mTextView.getLayout() != null) { 2056 mTextView.invalidateCursorPath(); 2057 } 2058 2059 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 2060 } 2061 } 2062 2063 void cancel() { 2064 if (!mCancelled) { 2065 removeCallbacks(Blink.this); 2066 mCancelled = true; 2067 } 2068 } 2069 2070 void uncancel() { 2071 mCancelled = false; 2072 } 2073 } 2074 2075 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 2076 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2077 com.android.internal.R.layout.text_drag_thumbnail, null); 2078 2079 if (shadowView == null) { 2080 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2081 } 2082 2083 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2084 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2085 } 2086 shadowView.setText(text); 2087 shadowView.setTextColor(mTextView.getTextColors()); 2088 2089 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2090 shadowView.setGravity(Gravity.CENTER); 2091 2092 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2093 ViewGroup.LayoutParams.WRAP_CONTENT)); 2094 2095 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2096 shadowView.measure(size, size); 2097 2098 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2099 shadowView.invalidate(); 2100 return new DragShadowBuilder(shadowView); 2101 } 2102 2103 private static class DragLocalState { 2104 public TextView sourceTextView; 2105 public int start, end; 2106 2107 public DragLocalState(TextView sourceTextView, int start, int end) { 2108 this.sourceTextView = sourceTextView; 2109 this.start = start; 2110 this.end = end; 2111 } 2112 } 2113 2114 void onDrop(DragEvent event) { 2115 StringBuilder content = new StringBuilder(""); 2116 ClipData clipData = event.getClipData(); 2117 final int itemCount = clipData.getItemCount(); 2118 for (int i=0; i < itemCount; i++) { 2119 Item item = clipData.getItemAt(i); 2120 content.append(item.coerceToStyledText(mTextView.getContext())); 2121 } 2122 2123 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2124 2125 Object localState = event.getLocalState(); 2126 DragLocalState dragLocalState = null; 2127 if (localState instanceof DragLocalState) { 2128 dragLocalState = (DragLocalState) localState; 2129 } 2130 boolean dragDropIntoItself = dragLocalState != null && 2131 dragLocalState.sourceTextView == mTextView; 2132 2133 if (dragDropIntoItself) { 2134 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2135 // A drop inside the original selection discards the drop. 2136 return; 2137 } 2138 } 2139 2140 final int originalLength = mTextView.getText().length(); 2141 int min = offset; 2142 int max = offset; 2143 2144 Selection.setSelection((Spannable) mTextView.getText(), max); 2145 mTextView.replaceText_internal(min, max, content); 2146 2147 if (dragDropIntoItself) { 2148 int dragSourceStart = dragLocalState.start; 2149 int dragSourceEnd = dragLocalState.end; 2150 if (max <= dragSourceStart) { 2151 // Inserting text before selection has shifted positions 2152 final int shift = mTextView.getText().length() - originalLength; 2153 dragSourceStart += shift; 2154 dragSourceEnd += shift; 2155 } 2156 2157 // Delete original selection 2158 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2159 2160 // Make sure we do not leave two adjacent spaces. 2161 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2162 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2163 if (nextCharIdx > prevCharIdx + 1) { 2164 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2165 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2166 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2167 } 2168 } 2169 } 2170 } 2171 2172 public void addSpanWatchers(Spannable text) { 2173 final int textLength = text.length(); 2174 2175 if (mKeyListener != null) { 2176 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2177 } 2178 2179 if (mSpanController == null) { 2180 mSpanController = new SpanController(); 2181 } 2182 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2183 } 2184 2185 /** 2186 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2187 * pop-up should be displayed. 2188 * Also monitors {@link Selection} to call back to the attached input method. 2189 */ 2190 class SpanController implements SpanWatcher { 2191 2192 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2193 2194 private EasyEditPopupWindow mPopupWindow; 2195 2196 private Runnable mHidePopup; 2197 2198 // This function is pure but inner classes can't have static functions 2199 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2200 final Object span) { 2201 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2202 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2203 } 2204 2205 @Override 2206 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2207 if (isNonIntermediateSelectionSpan(text, span)) { 2208 sendUpdateSelection(); 2209 } else if (span instanceof EasyEditSpan) { 2210 if (mPopupWindow == null) { 2211 mPopupWindow = new EasyEditPopupWindow(); 2212 mHidePopup = new Runnable() { 2213 @Override 2214 public void run() { 2215 hide(); 2216 } 2217 }; 2218 } 2219 2220 // Make sure there is only at most one EasyEditSpan in the text 2221 if (mPopupWindow.mEasyEditSpan != null) { 2222 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2223 } 2224 2225 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2226 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2227 @Override 2228 public void onDeleteClick(EasyEditSpan span) { 2229 Editable editable = (Editable) mTextView.getText(); 2230 int start = editable.getSpanStart(span); 2231 int end = editable.getSpanEnd(span); 2232 if (start >= 0 && end >= 0) { 2233 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2234 mTextView.deleteText_internal(start, end); 2235 } 2236 editable.removeSpan(span); 2237 } 2238 }); 2239 2240 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2241 // The window is not visible yet, ignore the text change. 2242 return; 2243 } 2244 2245 if (mTextView.getLayout() == null) { 2246 // The view has not been laid out yet, ignore the text change 2247 return; 2248 } 2249 2250 if (extractedTextModeWillBeStarted()) { 2251 // The input is in extract mode. Do not handle the easy edit in 2252 // the original TextView, as the ExtractEditText will do 2253 return; 2254 } 2255 2256 mPopupWindow.show(); 2257 mTextView.removeCallbacks(mHidePopup); 2258 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2259 } 2260 } 2261 2262 @Override 2263 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2264 if (isNonIntermediateSelectionSpan(text, span)) { 2265 sendUpdateSelection(); 2266 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2267 hide(); 2268 } 2269 } 2270 2271 @Override 2272 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2273 int newStart, int newEnd) { 2274 if (isNonIntermediateSelectionSpan(text, span)) { 2275 sendUpdateSelection(); 2276 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2277 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2278 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2279 text.removeSpan(easyEditSpan); 2280 } 2281 } 2282 2283 public void hide() { 2284 if (mPopupWindow != null) { 2285 mPopupWindow.hide(); 2286 mTextView.removeCallbacks(mHidePopup); 2287 } 2288 } 2289 2290 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2291 try { 2292 PendingIntent pendingIntent = span.getPendingIntent(); 2293 if (pendingIntent != null) { 2294 Intent intent = new Intent(); 2295 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2296 pendingIntent.send(mTextView.getContext(), 0, intent); 2297 } 2298 } catch (CanceledException e) { 2299 // This should not happen, as we should try to send the intent only once. 2300 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2301 } 2302 } 2303 } 2304 2305 /** 2306 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2307 */ 2308 private interface EasyEditDeleteListener { 2309 2310 /** 2311 * Clicks the delete pop-up. 2312 */ 2313 void onDeleteClick(EasyEditSpan span); 2314 } 2315 2316 /** 2317 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2318 * by {@link SpanController}. 2319 */ 2320 private class EasyEditPopupWindow extends PinnedPopupWindow 2321 implements OnClickListener { 2322 private static final int POPUP_TEXT_LAYOUT = 2323 com.android.internal.R.layout.text_edit_action_popup_text; 2324 private TextView mDeleteTextView; 2325 private EasyEditSpan mEasyEditSpan; 2326 private EasyEditDeleteListener mOnDeleteListener; 2327 2328 @Override 2329 protected void createPopupWindow() { 2330 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2331 com.android.internal.R.attr.textSelectHandleWindowStyle); 2332 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2333 mPopupWindow.setClippingEnabled(true); 2334 } 2335 2336 @Override 2337 protected void initContentView() { 2338 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2339 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2340 mContentView = linearLayout; 2341 mContentView.setBackgroundResource( 2342 com.android.internal.R.drawable.text_edit_side_paste_window); 2343 2344 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2345 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2346 2347 LayoutParams wrapContent = new LayoutParams( 2348 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2349 2350 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2351 mDeleteTextView.setLayoutParams(wrapContent); 2352 mDeleteTextView.setText(com.android.internal.R.string.delete); 2353 mDeleteTextView.setOnClickListener(this); 2354 mContentView.addView(mDeleteTextView); 2355 } 2356 2357 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2358 mEasyEditSpan = easyEditSpan; 2359 } 2360 2361 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2362 mOnDeleteListener = listener; 2363 } 2364 2365 @Override 2366 public void onClick(View view) { 2367 if (view == mDeleteTextView 2368 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2369 && mOnDeleteListener != null) { 2370 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2371 } 2372 } 2373 2374 @Override 2375 public void hide() { 2376 if (mEasyEditSpan != null) { 2377 mEasyEditSpan.setDeleteEnabled(false); 2378 } 2379 mOnDeleteListener = null; 2380 super.hide(); 2381 } 2382 2383 @Override 2384 protected int getTextOffset() { 2385 // Place the pop-up at the end of the span 2386 Editable editable = (Editable) mTextView.getText(); 2387 return editable.getSpanEnd(mEasyEditSpan); 2388 } 2389 2390 @Override 2391 protected int getVerticalLocalPosition(int line) { 2392 return mTextView.getLayout().getLineBottom(line); 2393 } 2394 2395 @Override 2396 protected int clipVertically(int positionY) { 2397 // As we display the pop-up below the span, no vertical clipping is required. 2398 return positionY; 2399 } 2400 } 2401 2402 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2403 // 3 handles 2404 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2405 // 1 CursorAnchorInfoNotifier 2406 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2407 private TextViewPositionListener[] mPositionListeners = 2408 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2409 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2410 private boolean mPositionHasChanged = true; 2411 // Absolute position of the TextView with respect to its parent window 2412 private int mPositionX, mPositionY; 2413 private int mNumberOfListeners; 2414 private boolean mScrollHasChanged; 2415 final int[] mTempCoords = new int[2]; 2416 2417 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2418 if (mNumberOfListeners == 0) { 2419 updatePosition(); 2420 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2421 vto.addOnPreDrawListener(this); 2422 } 2423 2424 int emptySlotIndex = -1; 2425 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2426 TextViewPositionListener listener = mPositionListeners[i]; 2427 if (listener == positionListener) { 2428 return; 2429 } else if (emptySlotIndex < 0 && listener == null) { 2430 emptySlotIndex = i; 2431 } 2432 } 2433 2434 mPositionListeners[emptySlotIndex] = positionListener; 2435 mCanMove[emptySlotIndex] = canMove; 2436 mNumberOfListeners++; 2437 } 2438 2439 public void removeSubscriber(TextViewPositionListener positionListener) { 2440 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2441 if (mPositionListeners[i] == positionListener) { 2442 mPositionListeners[i] = null; 2443 mNumberOfListeners--; 2444 break; 2445 } 2446 } 2447 2448 if (mNumberOfListeners == 0) { 2449 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2450 vto.removeOnPreDrawListener(this); 2451 } 2452 } 2453 2454 public int getPositionX() { 2455 return mPositionX; 2456 } 2457 2458 public int getPositionY() { 2459 return mPositionY; 2460 } 2461 2462 @Override 2463 public boolean onPreDraw() { 2464 updatePosition(); 2465 2466 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2467 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2468 TextViewPositionListener positionListener = mPositionListeners[i]; 2469 if (positionListener != null) { 2470 positionListener.updatePosition(mPositionX, mPositionY, 2471 mPositionHasChanged, mScrollHasChanged); 2472 } 2473 } 2474 } 2475 2476 mScrollHasChanged = false; 2477 return true; 2478 } 2479 2480 private void updatePosition() { 2481 mTextView.getLocationInWindow(mTempCoords); 2482 2483 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2484 2485 mPositionX = mTempCoords[0]; 2486 mPositionY = mTempCoords[1]; 2487 } 2488 2489 public void onScrollChanged() { 2490 mScrollHasChanged = true; 2491 } 2492 } 2493 2494 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2495 protected PopupWindow mPopupWindow; 2496 protected ViewGroup mContentView; 2497 int mPositionX, mPositionY; 2498 2499 protected abstract void createPopupWindow(); 2500 protected abstract void initContentView(); 2501 protected abstract int getTextOffset(); 2502 protected abstract int getVerticalLocalPosition(int line); 2503 protected abstract int clipVertically(int positionY); 2504 2505 public PinnedPopupWindow() { 2506 createPopupWindow(); 2507 2508 mPopupWindow.setWindowLayoutType( 2509 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2510 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2511 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2512 2513 initContentView(); 2514 2515 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2516 ViewGroup.LayoutParams.WRAP_CONTENT); 2517 mContentView.setLayoutParams(wrapContent); 2518 2519 mPopupWindow.setContentView(mContentView); 2520 } 2521 2522 public void show() { 2523 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2524 2525 computeLocalPosition(); 2526 2527 final PositionListener positionListener = getPositionListener(); 2528 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2529 } 2530 2531 protected void measureContent() { 2532 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2533 mContentView.measure( 2534 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2535 View.MeasureSpec.AT_MOST), 2536 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2537 View.MeasureSpec.AT_MOST)); 2538 } 2539 2540 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2541 * positioned according to viewportToContentHorizontalOffset. 2542 * 2543 * This method assumes that mContentView has properly been measured from its content. */ 2544 private void computeLocalPosition() { 2545 measureContent(); 2546 final int width = mContentView.getMeasuredWidth(); 2547 final int offset = getTextOffset(); 2548 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2549 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2550 2551 final int line = mTextView.getLayout().getLineForOffset(offset); 2552 mPositionY = getVerticalLocalPosition(line); 2553 mPositionY += mTextView.viewportToContentVerticalOffset(); 2554 } 2555 2556 private void updatePosition(int parentPositionX, int parentPositionY) { 2557 int positionX = parentPositionX + mPositionX; 2558 int positionY = parentPositionY + mPositionY; 2559 2560 positionY = clipVertically(positionY); 2561 2562 // Horizontal clipping 2563 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2564 final int width = mContentView.getMeasuredWidth(); 2565 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2566 positionX = Math.max(0, positionX); 2567 2568 if (isShowing()) { 2569 mPopupWindow.update(positionX, positionY, -1, -1); 2570 } else { 2571 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2572 positionX, positionY); 2573 } 2574 } 2575 2576 public void hide() { 2577 mPopupWindow.dismiss(); 2578 getPositionListener().removeSubscriber(this); 2579 } 2580 2581 @Override 2582 public void updatePosition(int parentPositionX, int parentPositionY, 2583 boolean parentPositionChanged, boolean parentScrolled) { 2584 // Either parentPositionChanged or parentScrolled is true, check if still visible 2585 if (isShowing() && isOffsetVisible(getTextOffset())) { 2586 if (parentScrolled) computeLocalPosition(); 2587 updatePosition(parentPositionX, parentPositionY); 2588 } else { 2589 hide(); 2590 } 2591 } 2592 2593 public boolean isShowing() { 2594 return mPopupWindow.isShowing(); 2595 } 2596 } 2597 2598 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2599 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2600 private static final int ADD_TO_DICTIONARY = -1; 2601 private static final int DELETE_TEXT = -2; 2602 private SuggestionInfo[] mSuggestionInfos; 2603 private int mNumberOfSuggestions; 2604 private boolean mCursorWasVisibleBeforeSuggestions; 2605 private boolean mIsShowingUp = false; 2606 private SuggestionAdapter mSuggestionsAdapter; 2607 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2608 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2609 2610 private class CustomPopupWindow extends PopupWindow { 2611 public CustomPopupWindow(Context context, int defStyleAttr) { 2612 super(context, null, defStyleAttr); 2613 } 2614 2615 @Override 2616 public void dismiss() { 2617 super.dismiss(); 2618 2619 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2620 2621 // Safe cast since show() checks that mTextView.getText() is an Editable 2622 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2623 2624 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2625 if (hasInsertionController()) { 2626 getInsertionController().show(); 2627 } 2628 } 2629 } 2630 2631 public SuggestionsPopupWindow() { 2632 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2633 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2634 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2635 } 2636 2637 @Override 2638 protected void createPopupWindow() { 2639 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2640 com.android.internal.R.attr.textSuggestionsWindowStyle); 2641 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2642 mPopupWindow.setFocusable(true); 2643 mPopupWindow.setClippingEnabled(false); 2644 } 2645 2646 @Override 2647 protected void initContentView() { 2648 ListView listView = new ListView(mTextView.getContext()); 2649 mSuggestionsAdapter = new SuggestionAdapter(); 2650 listView.setAdapter(mSuggestionsAdapter); 2651 listView.setOnItemClickListener(this); 2652 mContentView = listView; 2653 2654 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2655 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2656 for (int i = 0; i < mSuggestionInfos.length; i++) { 2657 mSuggestionInfos[i] = new SuggestionInfo(); 2658 } 2659 } 2660 2661 public boolean isShowingUp() { 2662 return mIsShowingUp; 2663 } 2664 2665 public void onParentLostFocus() { 2666 mIsShowingUp = false; 2667 } 2668 2669 private class SuggestionInfo { 2670 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2671 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2672 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2673 SpannableStringBuilder text = new SpannableStringBuilder(); 2674 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2675 android.R.style.TextAppearance_SuggestionHighlight); 2676 } 2677 2678 private class SuggestionAdapter extends BaseAdapter { 2679 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2680 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2681 2682 @Override 2683 public int getCount() { 2684 return mNumberOfSuggestions; 2685 } 2686 2687 @Override 2688 public Object getItem(int position) { 2689 return mSuggestionInfos[position]; 2690 } 2691 2692 @Override 2693 public long getItemId(int position) { 2694 return position; 2695 } 2696 2697 @Override 2698 public View getView(int position, View convertView, ViewGroup parent) { 2699 TextView textView = (TextView) convertView; 2700 2701 if (textView == null) { 2702 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2703 parent, false); 2704 } 2705 2706 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2707 textView.setText(suggestionInfo.text); 2708 2709 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2710 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2711 textView.setBackgroundColor(Color.TRANSPARENT); 2712 } else { 2713 textView.setBackgroundColor(Color.WHITE); 2714 } 2715 2716 return textView; 2717 } 2718 } 2719 2720 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2721 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2722 final int flag1 = span1.getFlags(); 2723 final int flag2 = span2.getFlags(); 2724 if (flag1 != flag2) { 2725 // The order here should match what is used in updateDrawState 2726 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2727 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2728 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2729 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2730 if (easy1 && !misspelled1) return -1; 2731 if (easy2 && !misspelled2) return 1; 2732 if (misspelled1) return -1; 2733 if (misspelled2) return 1; 2734 } 2735 2736 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2737 } 2738 } 2739 2740 /** 2741 * Returns the suggestion spans that cover the current cursor position. The suggestion 2742 * spans are sorted according to the length of text that they are attached to. 2743 */ 2744 private SuggestionSpan[] getSuggestionSpans() { 2745 int pos = mTextView.getSelectionStart(); 2746 Spannable spannable = (Spannable) mTextView.getText(); 2747 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2748 2749 mSpansLengths.clear(); 2750 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2751 int start = spannable.getSpanStart(suggestionSpan); 2752 int end = spannable.getSpanEnd(suggestionSpan); 2753 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2754 } 2755 2756 // The suggestions are sorted according to their types (easy correction first, then 2757 // misspelled) and to the length of the text that they cover (shorter first). 2758 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2759 return suggestionSpans; 2760 } 2761 2762 @Override 2763 public void show() { 2764 if (!(mTextView.getText() instanceof Editable)) return; 2765 2766 if (updateSuggestions()) { 2767 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2768 mTextView.setCursorVisible(false); 2769 mIsShowingUp = true; 2770 super.show(); 2771 } 2772 } 2773 2774 @Override 2775 protected void measureContent() { 2776 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2777 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2778 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2779 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2780 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2781 2782 int width = 0; 2783 View view = null; 2784 for (int i = 0; i < mNumberOfSuggestions; i++) { 2785 view = mSuggestionsAdapter.getView(i, view, mContentView); 2786 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2787 view.measure(horizontalMeasure, verticalMeasure); 2788 width = Math.max(width, view.getMeasuredWidth()); 2789 } 2790 2791 // Enforce the width based on actual text widths 2792 mContentView.measure( 2793 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2794 verticalMeasure); 2795 2796 Drawable popupBackground = mPopupWindow.getBackground(); 2797 if (popupBackground != null) { 2798 if (mTempRect == null) mTempRect = new Rect(); 2799 popupBackground.getPadding(mTempRect); 2800 width += mTempRect.left + mTempRect.right; 2801 } 2802 mPopupWindow.setWidth(width); 2803 } 2804 2805 @Override 2806 protected int getTextOffset() { 2807 return mTextView.getSelectionStart(); 2808 } 2809 2810 @Override 2811 protected int getVerticalLocalPosition(int line) { 2812 return mTextView.getLayout().getLineBottom(line); 2813 } 2814 2815 @Override 2816 protected int clipVertically(int positionY) { 2817 final int height = mContentView.getMeasuredHeight(); 2818 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2819 return Math.min(positionY, displayMetrics.heightPixels - height); 2820 } 2821 2822 @Override 2823 public void hide() { 2824 super.hide(); 2825 } 2826 2827 private boolean updateSuggestions() { 2828 Spannable spannable = (Spannable) mTextView.getText(); 2829 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2830 2831 final int nbSpans = suggestionSpans.length; 2832 // Suggestions are shown after a delay: the underlying spans may have been removed 2833 if (nbSpans == 0) return false; 2834 2835 mNumberOfSuggestions = 0; 2836 int spanUnionStart = mTextView.getText().length(); 2837 int spanUnionEnd = 0; 2838 2839 SuggestionSpan misspelledSpan = null; 2840 int underlineColor = 0; 2841 2842 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2843 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2844 final int spanStart = spannable.getSpanStart(suggestionSpan); 2845 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2846 spanUnionStart = Math.min(spanStart, spanUnionStart); 2847 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2848 2849 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2850 misspelledSpan = suggestionSpan; 2851 } 2852 2853 // The first span dictates the background color of the highlighted text 2854 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2855 2856 String[] suggestions = suggestionSpan.getSuggestions(); 2857 int nbSuggestions = suggestions.length; 2858 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2859 String suggestion = suggestions[suggestionIndex]; 2860 2861 boolean suggestionIsDuplicate = false; 2862 for (int i = 0; i < mNumberOfSuggestions; i++) { 2863 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2864 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2865 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2866 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2867 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2868 suggestionIsDuplicate = true; 2869 break; 2870 } 2871 } 2872 } 2873 2874 if (!suggestionIsDuplicate) { 2875 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2876 suggestionInfo.suggestionSpan = suggestionSpan; 2877 suggestionInfo.suggestionIndex = suggestionIndex; 2878 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2879 2880 mNumberOfSuggestions++; 2881 2882 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2883 // Also end outer for loop 2884 spanIndex = nbSpans; 2885 break; 2886 } 2887 } 2888 } 2889 } 2890 2891 for (int i = 0; i < mNumberOfSuggestions; i++) { 2892 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2893 } 2894 2895 // Add "Add to dictionary" item if there is a span with the misspelled flag 2896 if (misspelledSpan != null) { 2897 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2898 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2899 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2900 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2901 suggestionInfo.suggestionSpan = misspelledSpan; 2902 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2903 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2904 getContext().getString(com.android.internal.R.string.addToDictionary)); 2905 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2906 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2907 2908 mNumberOfSuggestions++; 2909 } 2910 } 2911 2912 // Delete item 2913 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2914 suggestionInfo.suggestionSpan = null; 2915 suggestionInfo.suggestionIndex = DELETE_TEXT; 2916 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2917 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2918 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2919 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2920 mNumberOfSuggestions++; 2921 2922 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2923 if (underlineColor == 0) { 2924 // Fallback on the default highlight color when the first span does not provide one 2925 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2926 } else { 2927 final float BACKGROUND_TRANSPARENCY = 0.4f; 2928 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2929 mSuggestionRangeSpan.setBackgroundColor( 2930 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2931 } 2932 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2933 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2934 2935 mSuggestionsAdapter.notifyDataSetChanged(); 2936 return true; 2937 } 2938 2939 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2940 int unionEnd) { 2941 final Spannable text = (Spannable) mTextView.getText(); 2942 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2943 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2944 2945 // Adjust the start/end of the suggestion span 2946 suggestionInfo.suggestionStart = spanStart - unionStart; 2947 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2948 + suggestionInfo.text.length(); 2949 2950 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2951 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2952 2953 // Add the text before and after the span. 2954 final String textAsString = text.toString(); 2955 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2956 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2957 } 2958 2959 @Override 2960 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2961 Editable editable = (Editable) mTextView.getText(); 2962 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2963 2964 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2965 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2966 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2967 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2968 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2969 if (spanUnionEnd < editable.length() && 2970 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2971 (spanUnionStart == 0 || 2972 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2973 spanUnionEnd = spanUnionEnd + 1; 2974 } 2975 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2976 } 2977 hide(); 2978 return; 2979 } 2980 2981 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2982 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2983 if (spanStart < 0 || spanEnd <= spanStart) { 2984 // Span has been removed 2985 hide(); 2986 return; 2987 } 2988 2989 final String originalText = editable.toString().substring(spanStart, spanEnd); 2990 2991 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 2992 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 2993 intent.putExtra("word", originalText); 2994 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 2995 // Put a listener to replace the original text with a word which the user 2996 // modified in a user dictionary dialog. 2997 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 2998 mTextView.getContext().startActivity(intent); 2999 // There is no way to know if the word was indeed added. Re-check. 3000 // TODO The ExtractEditText should remove the span in the original text instead 3001 editable.removeSpan(suggestionInfo.suggestionSpan); 3002 Selection.setSelection(editable, spanEnd); 3003 updateSpellCheckSpans(spanStart, spanEnd, false); 3004 } else { 3005 // SuggestionSpans are removed by replace: save them before 3006 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 3007 SuggestionSpan.class); 3008 final int length = suggestionSpans.length; 3009 int[] suggestionSpansStarts = new int[length]; 3010 int[] suggestionSpansEnds = new int[length]; 3011 int[] suggestionSpansFlags = new int[length]; 3012 for (int i = 0; i < length; i++) { 3013 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 3014 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 3015 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 3016 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 3017 3018 // Remove potential misspelled flags 3019 int suggestionSpanFlags = suggestionSpan.getFlags(); 3020 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 3021 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 3022 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 3023 suggestionSpan.setFlags(suggestionSpanFlags); 3024 } 3025 } 3026 3027 final int suggestionStart = suggestionInfo.suggestionStart; 3028 final int suggestionEnd = suggestionInfo.suggestionEnd; 3029 final String suggestion = suggestionInfo.text.subSequence( 3030 suggestionStart, suggestionEnd).toString(); 3031 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 3032 3033 // Notify source IME of the suggestion pick. Do this before 3034 // swaping texts. 3035 suggestionInfo.suggestionSpan.notifySelection( 3036 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 3037 3038 // Swap text content between actual text and Suggestion span 3039 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 3040 suggestions[suggestionInfo.suggestionIndex] = originalText; 3041 3042 // Restore previous SuggestionSpans 3043 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 3044 for (int i = 0; i < length; i++) { 3045 // Only spans that include the modified region make sense after replacement 3046 // Spans partially included in the replaced region are removed, there is no 3047 // way to assign them a valid range after replacement 3048 if (suggestionSpansStarts[i] <= spanStart && 3049 suggestionSpansEnds[i] >= spanEnd) { 3050 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 3051 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 3052 } 3053 } 3054 3055 // Move cursor at the end of the replaced word 3056 final int newCursorPosition = spanEnd + lengthDifference; 3057 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 3058 } 3059 3060 hide(); 3061 } 3062 } 3063 3064 /** 3065 * An ActionMode Callback class that is used to provide actions while in text selection mode. 3066 * 3067 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 3068 * on which of these this TextView supports. 3069 */ 3070 private class SelectionActionModeCallback extends ActionMode.Callback2 { 3071 private final Path mSelectionPath = new Path(); 3072 private final RectF mSelectionBounds = new RectF(); 3073 3074 private int mSelectionHandleHeight; 3075 private int mInsertionHandleHeight; 3076 3077 public SelectionActionModeCallback() { 3078 SelectionModifierCursorController selectionController = getSelectionController(); 3079 if (selectionController.mStartHandle == null) { 3080 // As these are for initializing selectionController, hide() must be called. 3081 selectionController.initDrawables(); 3082 selectionController.initHandles(); 3083 selectionController.hide(); 3084 } 3085 mSelectionHandleHeight = Math.max( 3086 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 3087 InsertionPointCursorController insertionController = getInsertionController(); 3088 if (insertionController != null) { 3089 insertionController.getHandle(); 3090 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3091 } 3092 } 3093 3094 @Override 3095 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3096 mode.setTitle(mTextView.getContext().getString( 3097 com.android.internal.R.string.textSelectionCABTitle)); 3098 mode.setSubtitle(null); 3099 mode.setTitleOptionalHint(true); 3100 populateMenuWithItems(menu); 3101 3102 if (mCustomSelectionActionModeCallback != null) { 3103 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3104 // The custom mode can choose to cancel the action mode 3105 return false; 3106 } 3107 } 3108 3109 addIntentMenuItemsForTextProcessing(menu); 3110 3111 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3112 mTextView.setHasTransientState(true); 3113 return true; 3114 } else { 3115 return false; 3116 } 3117 } 3118 3119 private void populateMenuWithItems(Menu menu) { 3120 if (mTextView.canCut()) { 3121 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3122 setAlphabeticShortcut('x'). 3123 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3124 } 3125 3126 if (mTextView.canCopy()) { 3127 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3128 setAlphabeticShortcut('c'). 3129 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3130 } 3131 3132 if (mTextView.canPaste()) { 3133 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3134 setAlphabeticShortcut('v'). 3135 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3136 } 3137 3138 if (mTextView.canShare()) { 3139 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3140 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3141 } 3142 3143 if (mTextView.canSelectAllText()) { 3144 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3145 setAlphabeticShortcut('a'). 3146 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3147 } 3148 3149 updateReplaceItem(menu); 3150 } 3151 3152 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3153 if (mTextView.canProcessText()) { 3154 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3155 List<ResolveInfo> supportedActivities = 3156 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3157 for (ResolveInfo info : supportedActivities) { 3158 menu.add(info.loadLabel(packageManager)) 3159 .setIntent(createProcessTextIntentForResolveInfo(info)) 3160 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3161 } 3162 } 3163 } 3164 3165 private Intent createProcessTextIntent() { 3166 return new Intent() 3167 .setAction(Intent.ACTION_PROCESS_TEXT) 3168 .setType("text/plain"); 3169 } 3170 3171 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3172 return createProcessTextIntent() 3173 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3174 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3175 } 3176 3177 @Override 3178 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3179 updateReplaceItem(menu); 3180 3181 if (mCustomSelectionActionModeCallback != null) { 3182 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3183 } 3184 return true; 3185 } 3186 3187 private void updateReplaceItem(Menu menu) { 3188 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3189 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3190 if (canReplace && !replaceItemExists) { 3191 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3192 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3193 } else if (!canReplace && replaceItemExists) { 3194 menu.removeItem(TextView.ID_REPLACE); 3195 } 3196 } 3197 3198 @Override 3199 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3200 if (item.getIntent() != null 3201 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3202 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3203 mPreserveDetachedSelection = true; 3204 mTextView.startActivityForResult( 3205 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3206 return true; 3207 } 3208 if (mCustomSelectionActionModeCallback != null && 3209 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3210 return true; 3211 } 3212 return mTextView.onTextContextMenuItem(item.getItemId()); 3213 } 3214 3215 @Override 3216 public void onDestroyActionMode(ActionMode mode) { 3217 if (mCustomSelectionActionModeCallback != null) { 3218 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3219 } 3220 3221 /* 3222 * If we're ending this mode because we're detaching from a window, 3223 * we still have selection state to preserve. Don't clear it, we'll 3224 * bring back the selection mode when (if) we get reattached. 3225 */ 3226 if (!mPreserveDetachedSelection) { 3227 Selection.setSelection((Spannable) mTextView.getText(), 3228 mTextView.getSelectionEnd()); 3229 mTextView.setHasTransientState(false); 3230 } 3231 3232 if (mSelectionModifierCursorController != null) { 3233 mSelectionModifierCursorController.hide(); 3234 mSelectionModifierCursorController.resetTouchOffsets(); 3235 } 3236 3237 mSelectionActionMode = null; 3238 } 3239 3240 @Override 3241 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3242 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3243 super.onGetContentRect(mode, view, outRect); 3244 return; 3245 } 3246 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3247 // We have a selection. 3248 mSelectionPath.reset(); 3249 mTextView.getLayout().getSelectionPath( 3250 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3251 mSelectionPath.computeBounds(mSelectionBounds, true); 3252 mSelectionBounds.bottom += mSelectionHandleHeight; 3253 } else if (mCursorCount == 2) { 3254 // We have a split cursor. In this case, we take the rectangle that includes both 3255 // parts of the cursor to ensure we don't obscure either of them. 3256 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3257 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3258 mSelectionBounds.set( 3259 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3260 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3261 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3262 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3263 + mInsertionHandleHeight); 3264 } else { 3265 // We have a single cursor. 3266 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3267 float primaryHorizontal = 3268 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3269 mSelectionBounds.set( 3270 primaryHorizontal, 3271 mTextView.getLayout().getLineTop(line), 3272 primaryHorizontal + 1, 3273 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3274 } 3275 // Take TextView's padding and scroll into account. 3276 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3277 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3278 outRect.set( 3279 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3280 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3281 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3282 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3283 } 3284 } 3285 3286 /** 3287 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3288 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3289 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3290 */ 3291 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3292 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3293 final int[] mTmpIntOffset = new int[2]; 3294 final Matrix mViewToScreenMatrix = new Matrix(); 3295 3296 @Override 3297 public void updatePosition(int parentPositionX, int parentPositionY, 3298 boolean parentPositionChanged, boolean parentScrolled) { 3299 final InputMethodState ims = mInputMethodState; 3300 if (ims == null || ims.mBatchEditNesting > 0) { 3301 return; 3302 } 3303 final InputMethodManager imm = InputMethodManager.peekInstance(); 3304 if (null == imm) { 3305 return; 3306 } 3307 if (!imm.isActive(mTextView)) { 3308 return; 3309 } 3310 // Skip if the IME has not requested the cursor/anchor position. 3311 if (!imm.isCursorAnchorInfoEnabled()) { 3312 return; 3313 } 3314 Layout layout = mTextView.getLayout(); 3315 if (layout == null) { 3316 return; 3317 } 3318 3319 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3320 builder.reset(); 3321 3322 final int selectionStart = mTextView.getSelectionStart(); 3323 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3324 3325 // Construct transformation matrix from view local coordinates to screen coordinates. 3326 mViewToScreenMatrix.set(mTextView.getMatrix()); 3327 mTextView.getLocationOnScreen(mTmpIntOffset); 3328 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3329 builder.setMatrix(mViewToScreenMatrix); 3330 3331 final float viewportToContentHorizontalOffset = 3332 mTextView.viewportToContentHorizontalOffset(); 3333 final float viewportToContentVerticalOffset = 3334 mTextView.viewportToContentVerticalOffset(); 3335 3336 final CharSequence text = mTextView.getText(); 3337 if (text instanceof Spannable) { 3338 final Spannable sp = (Spannable) text; 3339 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3340 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3341 if (composingTextEnd < composingTextStart) { 3342 final int temp = composingTextEnd; 3343 composingTextEnd = composingTextStart; 3344 composingTextStart = temp; 3345 } 3346 final boolean hasComposingText = 3347 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3348 if (hasComposingText) { 3349 final CharSequence composingText = text.subSequence(composingTextStart, 3350 composingTextEnd); 3351 builder.setComposingText(composingTextStart, composingText); 3352 3353 final int minLine = layout.getLineForOffset(composingTextStart); 3354 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3355 for (int line = minLine; line <= maxLine; ++line) { 3356 final int lineStart = layout.getLineStart(line); 3357 final int lineEnd = layout.getLineEnd(line); 3358 final int offsetStart = Math.max(lineStart, composingTextStart); 3359 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3360 final boolean ltrLine = 3361 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3362 final float[] widths = new float[offsetEnd - offsetStart]; 3363 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3364 final float top = layout.getLineTop(line); 3365 final float bottom = layout.getLineBottom(line); 3366 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3367 final float charWidth = widths[offset - offsetStart]; 3368 final boolean isRtl = layout.isRtlCharAt(offset); 3369 final float primary = layout.getPrimaryHorizontal(offset); 3370 final float secondary = layout.getSecondaryHorizontal(offset); 3371 // TODO: This doesn't work perfectly for text with custom styles and 3372 // TAB chars. 3373 final float left; 3374 final float right; 3375 if (ltrLine) { 3376 if (isRtl) { 3377 left = secondary - charWidth; 3378 right = secondary; 3379 } else { 3380 left = primary; 3381 right = primary + charWidth; 3382 } 3383 } else { 3384 if (!isRtl) { 3385 left = secondary; 3386 right = secondary + charWidth; 3387 } else { 3388 left = primary - charWidth; 3389 right = primary; 3390 } 3391 } 3392 // TODO: Check top-right and bottom-left as well. 3393 final float localLeft = left + viewportToContentHorizontalOffset; 3394 final float localRight = right + viewportToContentHorizontalOffset; 3395 final float localTop = top + viewportToContentVerticalOffset; 3396 final float localBottom = bottom + viewportToContentVerticalOffset; 3397 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3398 final boolean isBottomRightVisible = 3399 isPositionVisible(localRight, localBottom); 3400 int characterBoundsFlags = 0; 3401 if (isTopLeftVisible || isBottomRightVisible) { 3402 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3403 } 3404 if (!isTopLeftVisible || !isBottomRightVisible) { 3405 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3406 } 3407 if (isRtl) { 3408 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3409 } 3410 // Here offset is the index in Java chars. 3411 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3412 localBottom, characterBoundsFlags); 3413 } 3414 } 3415 } 3416 } 3417 3418 // Treat selectionStart as the insertion point. 3419 if (0 <= selectionStart) { 3420 final int offset = selectionStart; 3421 final int line = layout.getLineForOffset(offset); 3422 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3423 + viewportToContentHorizontalOffset; 3424 final float insertionMarkerTop = layout.getLineTop(line) 3425 + viewportToContentVerticalOffset; 3426 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3427 + viewportToContentVerticalOffset; 3428 final float insertionMarkerBottom = layout.getLineBottom(line) 3429 + viewportToContentVerticalOffset; 3430 final boolean isTopVisible = 3431 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3432 final boolean isBottomVisible = 3433 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3434 int insertionMarkerFlags = 0; 3435 if (isTopVisible || isBottomVisible) { 3436 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3437 } 3438 if (!isTopVisible || !isBottomVisible) { 3439 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3440 } 3441 if (layout.isRtlCharAt(offset)) { 3442 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3443 } 3444 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3445 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3446 } 3447 3448 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3449 } 3450 } 3451 3452 private abstract class HandleView extends View implements TextViewPositionListener { 3453 protected Drawable mDrawable; 3454 protected Drawable mDrawableLtr; 3455 protected Drawable mDrawableRtl; 3456 private final PopupWindow mContainer; 3457 // Position with respect to the parent TextView 3458 private int mPositionX, mPositionY; 3459 private boolean mIsDragging; 3460 // Offset from touch position to mPosition 3461 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3462 protected int mHotspotX; 3463 protected int mHorizontalGravity; 3464 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3465 private float mTouchOffsetY; 3466 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3467 private float mIdealVerticalOffset; 3468 // Parent's (TextView) previous position in window 3469 private int mLastParentX, mLastParentY; 3470 // Previous text character offset 3471 protected int mPreviousOffset = -1; 3472 // Previous text character offset 3473 private boolean mPositionHasChanged = true; 3474 // Minimum touch target size for handles 3475 private int mMinSize; 3476 // Indicates the line of text that the handle is on. 3477 protected int mPrevLine = -1; 3478 3479 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3480 super(mTextView.getContext()); 3481 mContainer = new PopupWindow(mTextView.getContext(), null, 3482 com.android.internal.R.attr.textSelectHandleWindowStyle); 3483 mContainer.setSplitTouchEnabled(true); 3484 mContainer.setClippingEnabled(false); 3485 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3486 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3487 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3488 mContainer.setContentView(this); 3489 3490 mDrawableLtr = drawableLtr; 3491 mDrawableRtl = drawableRtl; 3492 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3493 com.android.internal.R.dimen.text_handle_min_size); 3494 3495 updateDrawable(); 3496 3497 final int handleHeight = getPreferredHeight(); 3498 mTouchOffsetY = -0.3f * handleHeight; 3499 mIdealVerticalOffset = 0.7f * handleHeight; 3500 } 3501 3502 public float getIdealVerticalOffset() { 3503 return mIdealVerticalOffset; 3504 } 3505 3506 protected void updateDrawable() { 3507 final int offset = getCurrentCursorOffset(); 3508 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3509 final Drawable oldDrawable = mDrawable; 3510 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3511 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3512 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3513 if (oldDrawable != mDrawable) { 3514 postInvalidate(); 3515 } 3516 } 3517 3518 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3519 protected abstract int getHorizontalGravity(boolean isRtlRun); 3520 3521 // Touch-up filter: number of previous positions remembered 3522 private static final int HISTORY_SIZE = 5; 3523 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3524 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3525 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3526 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3527 private int mPreviousOffsetIndex = 0; 3528 private int mNumberPreviousOffsets = 0; 3529 3530 private void startTouchUpFilter(int offset) { 3531 mNumberPreviousOffsets = 0; 3532 addPositionToTouchUpFilter(offset); 3533 } 3534 3535 private void addPositionToTouchUpFilter(int offset) { 3536 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3537 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3538 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3539 mNumberPreviousOffsets++; 3540 } 3541 3542 private void filterOnTouchUp() { 3543 final long now = SystemClock.uptimeMillis(); 3544 int i = 0; 3545 int index = mPreviousOffsetIndex; 3546 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3547 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3548 i++; 3549 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3550 } 3551 3552 if (i > 0 && i < iMax && 3553 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3554 positionAtCursorOffset(mPreviousOffsets[index], false); 3555 } 3556 } 3557 3558 public boolean offsetHasBeenChanged() { 3559 return mNumberPreviousOffsets > 1; 3560 } 3561 3562 @Override 3563 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3564 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3565 } 3566 3567 private int getPreferredWidth() { 3568 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3569 } 3570 3571 private int getPreferredHeight() { 3572 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3573 } 3574 3575 public void show() { 3576 if (isShowing()) return; 3577 3578 getPositionListener().addSubscriber(this, true /* local position may change */); 3579 3580 // Make sure the offset is always considered new, even when focusing at same position 3581 mPreviousOffset = -1; 3582 positionAtCursorOffset(getCurrentCursorOffset(), false); 3583 } 3584 3585 protected void dismiss() { 3586 mIsDragging = false; 3587 mContainer.dismiss(); 3588 onDetached(); 3589 } 3590 3591 public void hide() { 3592 dismiss(); 3593 3594 getPositionListener().removeSubscriber(this); 3595 } 3596 3597 public boolean isShowing() { 3598 return mContainer.isShowing(); 3599 } 3600 3601 private boolean isVisible() { 3602 // Always show a dragging handle. 3603 if (mIsDragging) { 3604 return true; 3605 } 3606 3607 if (mTextView.isInBatchEditMode()) { 3608 return false; 3609 } 3610 3611 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3612 } 3613 3614 public abstract int getCurrentCursorOffset(); 3615 3616 protected abstract void updateSelection(int offset); 3617 3618 public abstract void updatePosition(float x, float y); 3619 3620 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3621 // A HandleView relies on the layout, which may be nulled by external methods 3622 Layout layout = mTextView.getLayout(); 3623 if (layout == null) { 3624 // Will update controllers' state, hiding them and stopping selection mode if needed 3625 prepareCursorControllers(); 3626 return; 3627 } 3628 3629 boolean offsetChanged = offset != mPreviousOffset; 3630 if (offsetChanged || parentScrolled) { 3631 if (offsetChanged) { 3632 updateSelection(offset); 3633 addPositionToTouchUpFilter(offset); 3634 } 3635 final int line = layout.getLineForOffset(offset); 3636 mPrevLine = line; 3637 3638 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3639 getHorizontalOffset() + getCursorOffset()); 3640 mPositionY = layout.getLineBottom(line); 3641 3642 // Take TextView's padding and scroll into account. 3643 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3644 mPositionY += mTextView.viewportToContentVerticalOffset(); 3645 3646 mPreviousOffset = offset; 3647 mPositionHasChanged = true; 3648 } 3649 } 3650 3651 public void updatePosition(int parentPositionX, int parentPositionY, 3652 boolean parentPositionChanged, boolean parentScrolled) { 3653 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3654 if (parentPositionChanged || mPositionHasChanged) { 3655 if (mIsDragging) { 3656 // Update touchToWindow offset in case of parent scrolling while dragging 3657 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3658 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3659 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3660 mLastParentX = parentPositionX; 3661 mLastParentY = parentPositionY; 3662 } 3663 3664 onHandleMoved(); 3665 } 3666 3667 if (isVisible()) { 3668 final int positionX = parentPositionX + mPositionX; 3669 final int positionY = parentPositionY + mPositionY; 3670 if (isShowing()) { 3671 mContainer.update(positionX, positionY, -1, -1); 3672 } else { 3673 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3674 positionX, positionY); 3675 } 3676 } else { 3677 if (isShowing()) { 3678 dismiss(); 3679 } 3680 } 3681 3682 mPositionHasChanged = false; 3683 } 3684 } 3685 3686 public void showAtLocation(int offset) { 3687 // TODO - investigate if there's a better way to show the handles 3688 // after the drag accelerator has occured. 3689 int[] tmpCords = new int[2]; 3690 mTextView.getLocationInWindow(tmpCords); 3691 3692 Layout layout = mTextView.getLayout(); 3693 int posX = tmpCords[0]; 3694 int posY = tmpCords[1]; 3695 3696 final int line = layout.getLineForOffset(offset); 3697 3698 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3699 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3700 int startY = layout.getLineBottom(line); 3701 3702 // Take TextView's padding and scroll into account. 3703 startX += mTextView.viewportToContentHorizontalOffset(); 3704 startY += mTextView.viewportToContentVerticalOffset(); 3705 3706 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3707 startX + posX, startY + posY); 3708 } 3709 3710 @Override 3711 protected void onDraw(Canvas c) { 3712 final int drawWidth = mDrawable.getIntrinsicWidth(); 3713 final int left = getHorizontalOffset(); 3714 3715 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3716 mDrawable.draw(c); 3717 } 3718 3719 private int getHorizontalOffset() { 3720 final int width = getPreferredWidth(); 3721 final int drawWidth = mDrawable.getIntrinsicWidth(); 3722 final int left; 3723 switch (mHorizontalGravity) { 3724 case Gravity.LEFT: 3725 left = 0; 3726 break; 3727 default: 3728 case Gravity.CENTER: 3729 left = (width - drawWidth) / 2; 3730 break; 3731 case Gravity.RIGHT: 3732 left = width - drawWidth; 3733 break; 3734 } 3735 return left; 3736 } 3737 3738 protected int getCursorOffset() { 3739 return 0; 3740 } 3741 3742 @Override 3743 public boolean onTouchEvent(MotionEvent ev) { 3744 updateFloatingToolbarVisibility(ev); 3745 3746 switch (ev.getActionMasked()) { 3747 case MotionEvent.ACTION_DOWN: { 3748 startTouchUpFilter(getCurrentCursorOffset()); 3749 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3750 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3751 3752 final PositionListener positionListener = getPositionListener(); 3753 mLastParentX = positionListener.getPositionX(); 3754 mLastParentY = positionListener.getPositionY(); 3755 mIsDragging = true; 3756 break; 3757 } 3758 3759 case MotionEvent.ACTION_MOVE: { 3760 final float rawX = ev.getRawX(); 3761 final float rawY = ev.getRawY(); 3762 3763 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3764 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3765 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3766 float newVerticalOffset; 3767 if (previousVerticalOffset < mIdealVerticalOffset) { 3768 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3769 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3770 } else { 3771 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3772 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3773 } 3774 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3775 3776 final float newPosX = 3777 rawX - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 3778 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3779 3780 updatePosition(newPosX, newPosY); 3781 break; 3782 } 3783 3784 case MotionEvent.ACTION_UP: 3785 filterOnTouchUp(); 3786 mIsDragging = false; 3787 break; 3788 3789 case MotionEvent.ACTION_CANCEL: 3790 mIsDragging = false; 3791 break; 3792 } 3793 return true; 3794 } 3795 3796 public boolean isDragging() { 3797 return mIsDragging; 3798 } 3799 3800 void onHandleMoved() {} 3801 3802 public void onDetached() {} 3803 } 3804 3805 private class InsertionHandleView extends HandleView { 3806 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3807 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3808 3809 // Used to detect taps on the insertion handle, which will affect the selection action mode 3810 private float mDownPositionX, mDownPositionY; 3811 private Runnable mHider; 3812 3813 public InsertionHandleView(Drawable drawable) { 3814 super(drawable, drawable); 3815 } 3816 3817 @Override 3818 public void show() { 3819 super.show(); 3820 3821 final long durationSinceCutOrCopy = 3822 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 3823 3824 // Cancel the single tap delayed runnable. 3825 if (mSelectionModeWithoutSelectionRunnable != null 3826 && (mDoubleTap || isCursorInsideEasyCorrectionSpan())) { 3827 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 3828 } 3829 3830 // Prepare and schedule the single tap runnable to run exactly after the double tap 3831 // timeout has passed. 3832 if (!mDoubleTap && !isCursorInsideEasyCorrectionSpan() 3833 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 3834 if (mSelectionModeWithoutSelectionRunnable == null) { 3835 mSelectionModeWithoutSelectionRunnable = new Runnable() { 3836 public void run() { 3837 startSelectionActionModeWithoutSelection(); 3838 } 3839 }; 3840 } 3841 3842 mTextView.postDelayed( 3843 mSelectionModeWithoutSelectionRunnable, 3844 ViewConfiguration.getDoubleTapTimeout() + 1); 3845 } 3846 3847 hideAfterDelay(); 3848 } 3849 3850 private void hideAfterDelay() { 3851 if (mHider == null) { 3852 mHider = new Runnable() { 3853 public void run() { 3854 hide(); 3855 } 3856 }; 3857 } else { 3858 removeHiderCallback(); 3859 } 3860 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3861 } 3862 3863 private void removeHiderCallback() { 3864 if (mHider != null) { 3865 mTextView.removeCallbacks(mHider); 3866 } 3867 } 3868 3869 @Override 3870 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3871 return drawable.getIntrinsicWidth() / 2; 3872 } 3873 3874 @Override 3875 protected int getHorizontalGravity(boolean isRtlRun) { 3876 return Gravity.CENTER_HORIZONTAL; 3877 } 3878 3879 @Override 3880 protected int getCursorOffset() { 3881 int offset = super.getCursorOffset(); 3882 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3883 if (cursor != null) { 3884 cursor.getPadding(mTempRect); 3885 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3886 } 3887 return offset; 3888 } 3889 3890 @Override 3891 public boolean onTouchEvent(MotionEvent ev) { 3892 final boolean result = super.onTouchEvent(ev); 3893 3894 switch (ev.getActionMasked()) { 3895 case MotionEvent.ACTION_DOWN: 3896 mDownPositionX = ev.getRawX(); 3897 mDownPositionY = ev.getRawY(); 3898 break; 3899 3900 case MotionEvent.ACTION_UP: 3901 if (!offsetHasBeenChanged()) { 3902 final float deltaX = mDownPositionX - ev.getRawX(); 3903 final float deltaY = mDownPositionY - ev.getRawY(); 3904 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3905 3906 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3907 mTextView.getContext()); 3908 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3909 3910 if (distanceSquared < touchSlop * touchSlop) { 3911 // Tapping on the handle toggles the selection action mode. 3912 if (mSelectionActionMode != null) { 3913 mSelectionActionMode.finish(); 3914 } else { 3915 startSelectionActionModeWithoutSelection(); 3916 } 3917 } 3918 } else { 3919 if (mSelectionActionMode != null) { 3920 mSelectionActionMode.invalidateContentRect(); 3921 } 3922 } 3923 hideAfterDelay(); 3924 break; 3925 3926 case MotionEvent.ACTION_CANCEL: 3927 hideAfterDelay(); 3928 break; 3929 3930 default: 3931 break; 3932 } 3933 3934 return result; 3935 } 3936 3937 @Override 3938 public int getCurrentCursorOffset() { 3939 return mTextView.getSelectionStart(); 3940 } 3941 3942 @Override 3943 public void updateSelection(int offset) { 3944 Selection.setSelection((Spannable) mTextView.getText(), offset); 3945 } 3946 3947 @Override 3948 public void updatePosition(float x, float y) { 3949 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3950 if (mSelectionActionMode != null) { 3951 mSelectionActionMode.invalidate(); 3952 } 3953 } 3954 3955 @Override 3956 void onHandleMoved() { 3957 super.onHandleMoved(); 3958 removeHiderCallback(); 3959 } 3960 3961 @Override 3962 public void onDetached() { 3963 super.onDetached(); 3964 removeHiderCallback(); 3965 } 3966 } 3967 3968 private class SelectionStartHandleView extends HandleView { 3969 // Indicates whether the cursor is making adjustments within a word. 3970 private boolean mInWord = false; 3971 // Difference between touch position and word boundary position. 3972 private float mTouchWordDelta; 3973 3974 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3975 super(drawableLtr, drawableRtl); 3976 } 3977 3978 @Override 3979 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3980 if (isRtlRun) { 3981 return drawable.getIntrinsicWidth() / 4; 3982 } else { 3983 return (drawable.getIntrinsicWidth() * 3) / 4; 3984 } 3985 } 3986 3987 @Override 3988 protected int getHorizontalGravity(boolean isRtlRun) { 3989 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 3990 } 3991 3992 @Override 3993 public int getCurrentCursorOffset() { 3994 return mTextView.getSelectionStart(); 3995 } 3996 3997 @Override 3998 public void updateSelection(int offset) { 3999 Selection.setSelection((Spannable) mTextView.getText(), offset, 4000 mTextView.getSelectionEnd()); 4001 updateDrawable(); 4002 if (mSelectionActionMode != null) { 4003 mSelectionActionMode.invalidate(); 4004 } 4005 } 4006 4007 @Override 4008 public void updatePosition(float x, float y) { 4009 final int selectionEnd = mTextView.getSelectionEnd(); 4010 final Layout layout = mTextView.getLayout(); 4011 int initialOffset = mTextView.getOffsetForPosition(x, y); 4012 int currLine = mTextView.getLineAtCoordinate(y); 4013 boolean positionCursor = false; 4014 4015 if (initialOffset >= selectionEnd) { 4016 // Handles have crossed, bound it to the last selected line and 4017 // adjust by word / char as normal. 4018 currLine = layout != null ? layout.getLineForOffset(selectionEnd) : mPrevLine; 4019 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4020 } 4021 4022 int offset = initialOffset; 4023 int end = getWordEnd(offset); 4024 int start = getWordStart(offset); 4025 4026 if (offset < mPreviousOffset) { 4027 // User is increasing the selection. 4028 if (!mInWord || currLine < mPrevLine) { 4029 // We're not in a word, or we're on a different line so we'll expand by 4030 // word. First ensure the user has at least entered the next word. 4031 int offsetToWord = Math.min((end - start) / 2, 2); 4032 if (offset <= end - offsetToWord || currLine < mPrevLine) { 4033 offset = start; 4034 } else { 4035 offset = mPreviousOffset; 4036 } 4037 } 4038 if (layout != null && offset < initialOffset) { 4039 final float adjustedX = layout.getPrimaryHorizontal(offset); 4040 mTouchWordDelta = 4041 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4042 } else { 4043 mTouchWordDelta = 0.0f; 4044 } 4045 positionCursor = true; 4046 } else { 4047 final int adjustedOffset = 4048 mTextView.getOffsetAtCoordinate(currLine, x - mTouchWordDelta); 4049 if (adjustedOffset > mPreviousOffset || currLine > mPrevLine) { 4050 // User is shrinking the selection. 4051 if (currLine > mPrevLine) { 4052 // We're on a different line, so we'll snap to word boundaries. 4053 offset = start; 4054 if (layout != null && offset < initialOffset) { 4055 final float adjustedX = layout.getPrimaryHorizontal(offset); 4056 mTouchWordDelta = 4057 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4058 } else { 4059 mTouchWordDelta = 0.0f; 4060 } 4061 } else { 4062 offset = adjustedOffset; 4063 } 4064 positionCursor = true; 4065 } 4066 } 4067 4068 if (positionCursor) { 4069 // Handles can not cross and selection is at least one character. 4070 if (offset >= selectionEnd) { 4071 offset = getNextCursorOffset(selectionEnd, false); 4072 mTouchWordDelta = 0.0f; 4073 } 4074 positionAtCursorOffset(offset, false); 4075 } 4076 } 4077 4078 @Override 4079 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4080 super.positionAtCursorOffset(offset, parentScrolled); 4081 mInWord = !getWordIteratorWithText().isBoundary(offset); 4082 } 4083 4084 @Override 4085 public boolean onTouchEvent(MotionEvent event) { 4086 boolean superResult = super.onTouchEvent(event); 4087 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4088 // Reset the touch word offset when the user has lifted their finger. 4089 mTouchWordDelta = 0.0f; 4090 } 4091 return superResult; 4092 } 4093 } 4094 4095 private class SelectionEndHandleView extends HandleView { 4096 // Indicates whether the cursor is making adjustments within a word. 4097 private boolean mInWord = false; 4098 // Difference between touch position and word boundary position. 4099 private float mTouchWordDelta; 4100 4101 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4102 super(drawableLtr, drawableRtl); 4103 } 4104 4105 @Override 4106 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4107 if (isRtlRun) { 4108 return (drawable.getIntrinsicWidth() * 3) / 4; 4109 } else { 4110 return drawable.getIntrinsicWidth() / 4; 4111 } 4112 } 4113 4114 @Override 4115 protected int getHorizontalGravity(boolean isRtlRun) { 4116 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 4117 } 4118 4119 @Override 4120 public int getCurrentCursorOffset() { 4121 return mTextView.getSelectionEnd(); 4122 } 4123 4124 @Override 4125 public void updateSelection(int offset) { 4126 Selection.setSelection((Spannable) mTextView.getText(), 4127 mTextView.getSelectionStart(), offset); 4128 if (mSelectionActionMode != null) { 4129 mSelectionActionMode.invalidate(); 4130 } 4131 updateDrawable(); 4132 } 4133 4134 @Override 4135 public void updatePosition(float x, float y) { 4136 final int selectionStart = mTextView.getSelectionStart(); 4137 final Layout layout = mTextView.getLayout(); 4138 int initialOffset = mTextView.getOffsetForPosition(x, y); 4139 int currLine = mTextView.getLineAtCoordinate(y); 4140 boolean positionCursor = false; 4141 4142 if (initialOffset <= selectionStart) { 4143 // Handles have crossed, bound it to the first selected line and 4144 // adjust by word / char as normal. 4145 currLine = layout != null ? layout.getLineForOffset(selectionStart) : mPrevLine; 4146 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4147 } 4148 4149 int offset = initialOffset; 4150 int end = getWordEnd(offset); 4151 int start = getWordStart(offset); 4152 4153 if (offset > mPreviousOffset) { 4154 // User is increasing the selection. 4155 if (!mInWord || currLine > mPrevLine) { 4156 // We're not in a word, or we're on a different line so we'll expand by 4157 // word. First ensure the user has at least entered the next word. 4158 int midPoint = Math.min((end - start) / 2, 2); 4159 if (offset >= start + midPoint || currLine > mPrevLine) { 4160 offset = end; 4161 } else { 4162 offset = mPreviousOffset; 4163 } 4164 } 4165 if (layout != null && offset > initialOffset) { 4166 final float adjustedX = layout.getPrimaryHorizontal(offset); 4167 mTouchWordDelta = 4168 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4169 } else { 4170 mTouchWordDelta = 0.0f; 4171 } 4172 positionCursor = true; 4173 } else { 4174 final int adjustedOffset = 4175 mTextView.getOffsetAtCoordinate(currLine, x + mTouchWordDelta); 4176 if (adjustedOffset < mPreviousOffset || currLine < mPrevLine) { 4177 // User is shrinking the selection. 4178 if (currLine < mPrevLine) { 4179 // We're on a different line, so we'll snap to word boundaries. 4180 offset = end; 4181 if (layout != null && offset > initialOffset) { 4182 final float adjustedX = layout.getPrimaryHorizontal(offset); 4183 mTouchWordDelta = 4184 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4185 } else { 4186 mTouchWordDelta = 0.0f; 4187 } 4188 } else { 4189 offset = adjustedOffset; 4190 } 4191 positionCursor = true; 4192 } 4193 } 4194 4195 if (positionCursor) { 4196 // Handles can not cross and selection is at least one character. 4197 if (offset <= selectionStart) { 4198 offset = getNextCursorOffset(selectionStart, true); 4199 mTouchWordDelta = 0.0f; 4200 } 4201 positionAtCursorOffset(offset, false); 4202 } 4203 } 4204 4205 @Override 4206 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4207 super.positionAtCursorOffset(offset, parentScrolled); 4208 mInWord = !getWordIteratorWithText().isBoundary(offset); 4209 } 4210 4211 @Override 4212 public boolean onTouchEvent(MotionEvent event) { 4213 boolean superResult = super.onTouchEvent(event); 4214 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4215 // Reset the touch word offset when the user has lifted their finger. 4216 mTouchWordDelta = 0.0f; 4217 } 4218 return superResult; 4219 } 4220 } 4221 4222 /** 4223 * A CursorController instance can be used to control a cursor in the text. 4224 */ 4225 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4226 /** 4227 * Makes the cursor controller visible on screen. 4228 * See also {@link #hide()}. 4229 */ 4230 public void show(); 4231 4232 /** 4233 * Hide the cursor controller from screen. 4234 * See also {@link #show()}. 4235 */ 4236 public void hide(); 4237 4238 /** 4239 * Called when the view is detached from window. Perform house keeping task, such as 4240 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4241 * preventing the activity from being recycled. 4242 */ 4243 public void onDetached(); 4244 } 4245 4246 private class InsertionPointCursorController implements CursorController { 4247 private InsertionHandleView mHandle; 4248 4249 public void show() { 4250 getHandle().show(); 4251 4252 if (mSelectionModifierCursorController != null) { 4253 mSelectionModifierCursorController.hide(); 4254 } 4255 } 4256 4257 public void hide() { 4258 if (mHandle != null) { 4259 mHandle.hide(); 4260 } 4261 } 4262 4263 public void onTouchModeChanged(boolean isInTouchMode) { 4264 if (!isInTouchMode) { 4265 hide(); 4266 } 4267 } 4268 4269 private InsertionHandleView getHandle() { 4270 if (mSelectHandleCenter == null) { 4271 mSelectHandleCenter = mTextView.getContext().getDrawable( 4272 mTextView.mTextSelectHandleRes); 4273 } 4274 if (mHandle == null) { 4275 mHandle = new InsertionHandleView(mSelectHandleCenter); 4276 } 4277 return mHandle; 4278 } 4279 4280 @Override 4281 public void onDetached() { 4282 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4283 observer.removeOnTouchModeChangeListener(this); 4284 4285 if (mHandle != null) mHandle.onDetached(); 4286 } 4287 } 4288 4289 class SelectionModifierCursorController implements CursorController { 4290 // The cursor controller handles, lazily created when shown. 4291 private SelectionStartHandleView mStartHandle; 4292 private SelectionEndHandleView mEndHandle; 4293 // The offsets of that last touch down event. Remembered to start selection there. 4294 private int mMinTouchOffset, mMaxTouchOffset; 4295 4296 private float mDownPositionX, mDownPositionY; 4297 private boolean mGestureStayedInTapRegion; 4298 4299 // Where the user first starts the drag motion. 4300 private int mStartOffset = -1; 4301 // Indicates whether the user is selecting text and using the drag accelerator. 4302 private boolean mDragAcceleratorActive; 4303 private boolean mHaventMovedEnoughToStartDrag; 4304 4305 SelectionModifierCursorController() { 4306 resetTouchOffsets(); 4307 } 4308 4309 public void show() { 4310 if (mTextView.isInBatchEditMode()) { 4311 return; 4312 } 4313 initDrawables(); 4314 initHandles(); 4315 hideInsertionPointCursorController(); 4316 } 4317 4318 private void initDrawables() { 4319 if (mSelectHandleLeft == null) { 4320 mSelectHandleLeft = mTextView.getContext().getDrawable( 4321 mTextView.mTextSelectHandleLeftRes); 4322 } 4323 if (mSelectHandleRight == null) { 4324 mSelectHandleRight = mTextView.getContext().getDrawable( 4325 mTextView.mTextSelectHandleRightRes); 4326 } 4327 } 4328 4329 private void initHandles() { 4330 // Lazy object creation has to be done before updatePosition() is called. 4331 if (mStartHandle == null) { 4332 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4333 } 4334 if (mEndHandle == null) { 4335 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4336 } 4337 4338 mStartHandle.show(); 4339 mEndHandle.show(); 4340 4341 hideInsertionPointCursorController(); 4342 } 4343 4344 public void hide() { 4345 if (mStartHandle != null) mStartHandle.hide(); 4346 if (mEndHandle != null) mEndHandle.hide(); 4347 } 4348 4349 public void enterDrag() { 4350 // Just need to init the handles / hide insertion cursor. 4351 show(); 4352 mDragAcceleratorActive = true; 4353 // Start location of selection. 4354 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4355 mLastDownPositionY); 4356 // Don't show the handles until user has lifted finger. 4357 hide(); 4358 4359 // This stops scrolling parents from intercepting the touch event, allowing 4360 // the user to continue dragging across the screen to select text; TextView will 4361 // scroll as necessary. 4362 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4363 } 4364 4365 public void onTouchEvent(MotionEvent event) { 4366 // This is done even when the View does not have focus, so that long presses can start 4367 // selection and tap can move cursor from this tap position. 4368 final float eventX = event.getX(); 4369 final float eventY = event.getY(); 4370 switch (event.getActionMasked()) { 4371 case MotionEvent.ACTION_DOWN: 4372 4373 // Remember finger down position, to be able to start selection from there. 4374 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 4375 eventX, eventY); 4376 4377 // Double tap detection 4378 if (mGestureStayedInTapRegion) { 4379 if (mDoubleTap) { 4380 final float deltaX = eventX - mDownPositionX; 4381 final float deltaY = eventY - mDownPositionY; 4382 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4383 4384 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4385 mTextView.getContext()); 4386 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4387 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4388 4389 if (stayedInArea && isPositionOnText(eventX, eventY)) { 4390 startSelectionActionModeWithSelectionAndStartDrag(); 4391 mDiscardNextActionUp = true; 4392 } 4393 } 4394 } 4395 4396 mDownPositionX = eventX; 4397 mDownPositionY = eventY; 4398 mGestureStayedInTapRegion = true; 4399 mHaventMovedEnoughToStartDrag = true; 4400 break; 4401 4402 case MotionEvent.ACTION_POINTER_DOWN: 4403 case MotionEvent.ACTION_POINTER_UP: 4404 // Handle multi-point gestures. Keep min and max offset positions. 4405 // Only activated for devices that correctly handle multi-touch. 4406 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4407 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4408 updateMinAndMaxOffsets(event); 4409 } 4410 break; 4411 4412 case MotionEvent.ACTION_MOVE: 4413 final ViewConfiguration viewConfig = ViewConfiguration.get( 4414 mTextView.getContext()); 4415 final int touchSlop = viewConfig.getScaledTouchSlop(); 4416 4417 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 4418 final float deltaX = eventX - mDownPositionX; 4419 final float deltaY = eventY - mDownPositionY; 4420 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4421 4422 if (mGestureStayedInTapRegion) { 4423 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 4424 mGestureStayedInTapRegion = 4425 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 4426 } 4427 if (mHaventMovedEnoughToStartDrag) { 4428 // We don't start dragging until the user has moved enough. 4429 mHaventMovedEnoughToStartDrag = 4430 distanceSquared <= touchSlop * touchSlop; 4431 } 4432 } 4433 4434 if (mStartHandle != null && mStartHandle.isShowing()) { 4435 // Don't do the drag if the handles are showing already. 4436 break; 4437 } 4438 4439 if (mStartOffset != -1) { 4440 if (!mHaventMovedEnoughToStartDrag) { 4441 // Offset the finger by the same vertical offset as the handles. This 4442 // improves visibility of the content being selected by shifting 4443 // the finger below the content. 4444 final float fingerOffset = (mStartHandle != null) 4445 ? mStartHandle.getIdealVerticalOffset() 4446 : touchSlop; 4447 int offset = 4448 mTextView.getOffsetForPosition(eventX, eventY - fingerOffset); 4449 int startOffset; 4450 // Snap to word boundaries. 4451 if (mStartOffset < offset) { 4452 // Expanding with end handle. 4453 offset = getWordEnd(offset); 4454 startOffset = getWordStart(mStartOffset); 4455 } else { 4456 // Expanding with start handle. 4457 offset = getWordStart(offset); 4458 startOffset = getWordEnd(mStartOffset); 4459 } 4460 Selection.setSelection((Spannable) mTextView.getText(), 4461 startOffset, offset); 4462 } 4463 } 4464 break; 4465 4466 case MotionEvent.ACTION_UP: 4467 if (mDragAcceleratorActive) { 4468 // No longer dragging to select text, let the parent intercept events. 4469 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4470 4471 show(); 4472 int startOffset = mTextView.getSelectionStart(); 4473 int endOffset = mTextView.getSelectionEnd(); 4474 4475 // Since we don't let drag handles pass once they're visible, we need to 4476 // make sure the start / end locations are correct because the user *can* 4477 // switch directions during the initial drag. 4478 if (endOffset < startOffset) { 4479 int tmp = endOffset; 4480 endOffset = startOffset; 4481 startOffset = tmp; 4482 4483 // Also update the selection with the right offsets in this case. 4484 Selection.setSelection((Spannable) mTextView.getText(), 4485 startOffset, endOffset); 4486 } 4487 4488 // Need to do this to display the handles. 4489 mStartHandle.showAtLocation(startOffset); 4490 mEndHandle.showAtLocation(endOffset); 4491 4492 // No longer the first dragging motion, reset. 4493 mDragAcceleratorActive = false; 4494 mStartOffset = -1; 4495 } 4496 break; 4497 } 4498 } 4499 4500 /** 4501 * @param event 4502 */ 4503 private void updateMinAndMaxOffsets(MotionEvent event) { 4504 int pointerCount = event.getPointerCount(); 4505 for (int index = 0; index < pointerCount; index++) { 4506 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4507 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4508 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4509 } 4510 } 4511 4512 public int getMinTouchOffset() { 4513 return mMinTouchOffset; 4514 } 4515 4516 public int getMaxTouchOffset() { 4517 return mMaxTouchOffset; 4518 } 4519 4520 public void resetTouchOffsets() { 4521 mMinTouchOffset = mMaxTouchOffset = -1; 4522 mStartOffset = -1; 4523 mDragAcceleratorActive = false; 4524 } 4525 4526 /** 4527 * @return true iff this controller is currently used to move the selection start. 4528 */ 4529 public boolean isSelectionStartDragged() { 4530 return mStartHandle != null && mStartHandle.isDragging(); 4531 } 4532 4533 /** 4534 * @return true if the user is selecting text using the drag accelerator. 4535 */ 4536 public boolean isDragAcceleratorActive() { 4537 return mDragAcceleratorActive; 4538 } 4539 4540 public void onTouchModeChanged(boolean isInTouchMode) { 4541 if (!isInTouchMode) { 4542 hide(); 4543 } 4544 } 4545 4546 @Override 4547 public void onDetached() { 4548 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4549 observer.removeOnTouchModeChangeListener(this); 4550 4551 if (mStartHandle != null) mStartHandle.onDetached(); 4552 if (mEndHandle != null) mEndHandle.onDetached(); 4553 } 4554 } 4555 4556 private class CorrectionHighlighter { 4557 private final Path mPath = new Path(); 4558 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4559 private int mStart, mEnd; 4560 private long mFadingStartTime; 4561 private RectF mTempRectF; 4562 private final static int FADE_OUT_DURATION = 400; 4563 4564 public CorrectionHighlighter() { 4565 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4566 applicationScale); 4567 mPaint.setStyle(Paint.Style.FILL); 4568 } 4569 4570 public void highlight(CorrectionInfo info) { 4571 mStart = info.getOffset(); 4572 mEnd = mStart + info.getNewText().length(); 4573 mFadingStartTime = SystemClock.uptimeMillis(); 4574 4575 if (mStart < 0 || mEnd < 0) { 4576 stopAnimation(); 4577 } 4578 } 4579 4580 public void draw(Canvas canvas, int cursorOffsetVertical) { 4581 if (updatePath() && updatePaint()) { 4582 if (cursorOffsetVertical != 0) { 4583 canvas.translate(0, cursorOffsetVertical); 4584 } 4585 4586 canvas.drawPath(mPath, mPaint); 4587 4588 if (cursorOffsetVertical != 0) { 4589 canvas.translate(0, -cursorOffsetVertical); 4590 } 4591 invalidate(true); // TODO invalidate cursor region only 4592 } else { 4593 stopAnimation(); 4594 invalidate(false); // TODO invalidate cursor region only 4595 } 4596 } 4597 4598 private boolean updatePaint() { 4599 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4600 if (duration > FADE_OUT_DURATION) return false; 4601 4602 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4603 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4604 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4605 ((int) (highlightColorAlpha * coef) << 24); 4606 mPaint.setColor(color); 4607 return true; 4608 } 4609 4610 private boolean updatePath() { 4611 final Layout layout = mTextView.getLayout(); 4612 if (layout == null) return false; 4613 4614 // Update in case text is edited while the animation is run 4615 final int length = mTextView.getText().length(); 4616 int start = Math.min(length, mStart); 4617 int end = Math.min(length, mEnd); 4618 4619 mPath.reset(); 4620 layout.getSelectionPath(start, end, mPath); 4621 return true; 4622 } 4623 4624 private void invalidate(boolean delayed) { 4625 if (mTextView.getLayout() == null) return; 4626 4627 if (mTempRectF == null) mTempRectF = new RectF(); 4628 mPath.computeBounds(mTempRectF, false); 4629 4630 int left = mTextView.getCompoundPaddingLeft(); 4631 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4632 4633 if (delayed) { 4634 mTextView.postInvalidateOnAnimation( 4635 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4636 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4637 } else { 4638 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4639 (int) mTempRectF.right, (int) mTempRectF.bottom); 4640 } 4641 } 4642 4643 private void stopAnimation() { 4644 Editor.this.mCorrectionHighlighter = null; 4645 } 4646 } 4647 4648 private static class ErrorPopup extends PopupWindow { 4649 private boolean mAbove = false; 4650 private final TextView mView; 4651 private int mPopupInlineErrorBackgroundId = 0; 4652 private int mPopupInlineErrorAboveBackgroundId = 0; 4653 4654 ErrorPopup(TextView v, int width, int height) { 4655 super(v, width, height); 4656 mView = v; 4657 // Make sure the TextView has a background set as it will be used the first time it is 4658 // shown and positioned. Initialized with below background, which should have 4659 // dimensions identical to the above version for this to work (and is more likely). 4660 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4661 com.android.internal.R.styleable.Theme_errorMessageBackground); 4662 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4663 } 4664 4665 void fixDirection(boolean above) { 4666 mAbove = above; 4667 4668 if (above) { 4669 mPopupInlineErrorAboveBackgroundId = 4670 getResourceId(mPopupInlineErrorAboveBackgroundId, 4671 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4672 } else { 4673 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4674 com.android.internal.R.styleable.Theme_errorMessageBackground); 4675 } 4676 4677 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4678 mPopupInlineErrorBackgroundId); 4679 } 4680 4681 private int getResourceId(int currentId, int index) { 4682 if (currentId == 0) { 4683 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4684 R.styleable.Theme); 4685 currentId = styledAttributes.getResourceId(index, 0); 4686 styledAttributes.recycle(); 4687 } 4688 return currentId; 4689 } 4690 4691 @Override 4692 public void update(int x, int y, int w, int h, boolean force) { 4693 super.update(x, y, w, h, force); 4694 4695 boolean above = isAboveAnchor(); 4696 if (above != mAbove) { 4697 fixDirection(above); 4698 } 4699 } 4700 } 4701 4702 static class InputContentType { 4703 int imeOptions = EditorInfo.IME_NULL; 4704 String privateImeOptions; 4705 CharSequence imeActionLabel; 4706 int imeActionId; 4707 Bundle extras; 4708 OnEditorActionListener onEditorActionListener; 4709 boolean enterDown; 4710 } 4711 4712 static class InputMethodState { 4713 ExtractedTextRequest mExtractedTextRequest; 4714 final ExtractedText mExtractedText = new ExtractedText(); 4715 int mBatchEditNesting; 4716 boolean mCursorChanged; 4717 boolean mSelectionModeChanged; 4718 boolean mContentChanged; 4719 int mChangedStart, mChangedEnd, mChangedDelta; 4720 } 4721 4722 /** 4723 * @return True iff (start, end) is a valid range within the text. 4724 */ 4725 private static boolean isValidRange(CharSequence text, int start, int end) { 4726 return 0 <= start && start <= end && end <= text.length(); 4727 } 4728 4729 /** 4730 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4731 * text being typed (and hence always returns null from the filter() method). 4732 */ 4733 public static class UndoInputFilter implements InputFilter { 4734 private final Editor mEditor; 4735 4736 // Whether the current filter pass is directly caused by an end-user text edit. 4737 private boolean mIsUserEdit; 4738 4739 // Whether the text field is handling an IME composition. Must be parceled in case the user 4740 // rotates the screen during composition. 4741 private boolean mHasComposition; 4742 4743 public UndoInputFilter(Editor editor) { 4744 mEditor = editor; 4745 } 4746 4747 public void saveInstanceState(Parcel parcel) { 4748 parcel.writeInt(mIsUserEdit ? 1 : 0); 4749 parcel.writeInt(mHasComposition ? 1 : 0); 4750 } 4751 4752 public void restoreInstanceState(Parcel parcel) { 4753 mIsUserEdit = parcel.readInt() != 0; 4754 mHasComposition = parcel.readInt() != 0; 4755 } 4756 4757 /** 4758 * Signals that a user-triggered edit is starting. 4759 */ 4760 public void beginBatchEdit() { 4761 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4762 mIsUserEdit = true; 4763 } 4764 4765 public void endBatchEdit() { 4766 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4767 mIsUserEdit = false; 4768 } 4769 4770 @Override 4771 public CharSequence filter(CharSequence source, int start, int end, 4772 Spanned dest, int dstart, int dend) { 4773 if (DEBUG_UNDO) { 4774 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4775 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4776 } 4777 4778 // Check to see if this edit should be tracked for undo. 4779 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4780 return null; 4781 } 4782 4783 // Check for and handle IME composition edits. 4784 if (handleCompositionEdit(source, start, end, dstart)) { 4785 return null; 4786 } 4787 4788 // Handle keyboard edits. 4789 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4790 return null; 4791 } 4792 4793 /** 4794 * Returns true iff the edit was handled, either because it should be ignored or because 4795 * this function created an undo operation for it. 4796 */ 4797 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4798 // Ignore edits while the user is composing. 4799 if (isComposition(source)) { 4800 mHasComposition = true; 4801 return true; 4802 } 4803 final boolean hadComposition = mHasComposition; 4804 mHasComposition = false; 4805 4806 // Check for the transition out of the composing state. 4807 if (hadComposition) { 4808 // If there was no text the user canceled composition. Ignore the edit. 4809 if (start == end) { 4810 return true; 4811 } 4812 4813 // Otherwise the user inserted the composition. 4814 String newText = TextUtils.substring(source, start, end); 4815 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4816 recordEdit(edit, false /* forceMerge */); 4817 return true; 4818 } 4819 4820 // This was neither a composition event nor a transition out of composing. 4821 return false; 4822 } 4823 4824 private void handleKeyboardEdit(CharSequence source, int start, int end, 4825 Spanned dest, int dstart, int dend) { 4826 // An application may install a TextWatcher to provide additional modifications after 4827 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4828 // string). This results in multiple filter() calls for what the user considers to be 4829 // a single operation. Always undo the whole set of changes in one step. 4830 final boolean forceMerge = isInTextWatcher(); 4831 4832 // Build a new operation with all the information from this edit. 4833 String newText = TextUtils.substring(source, start, end); 4834 String oldText = TextUtils.substring(dest, dstart, dend); 4835 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4836 recordEdit(edit, forceMerge); 4837 } 4838 4839 /** 4840 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4841 * If forceMerge is true then the new edit is always merged. 4842 */ 4843 private void recordEdit(EditOperation edit, boolean forceMerge) { 4844 // Fetch the last edit operation and attempt to merge in the new edit. 4845 final UndoManager um = mEditor.mUndoManager; 4846 um.beginUpdate("Edit text"); 4847 EditOperation lastEdit = um.getLastOperation( 4848 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4849 if (lastEdit == null) { 4850 // Add this as the first edit. 4851 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4852 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4853 } else if (forceMerge) { 4854 // Forced merges take priority because they could be the result of a non-user-edit 4855 // change and this case should not create a new undo operation. 4856 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4857 lastEdit.forceMergeWith(edit); 4858 } else if (!mIsUserEdit) { 4859 // An application directly modified the Editable outside of a text edit. Treat this 4860 // as a new change and don't attempt to merge. 4861 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4862 um.commitState(mEditor.mUndoOwner); 4863 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4864 } else if (lastEdit.mergeWith(edit)) { 4865 // Merge succeeded, nothing else to do. 4866 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4867 } else { 4868 // Could not merge with the last edit, so commit the last edit and add this edit. 4869 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4870 um.commitState(mEditor.mUndoOwner); 4871 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4872 } 4873 um.endUpdate(); 4874 } 4875 4876 private boolean canUndoEdit(CharSequence source, int start, int end, 4877 Spanned dest, int dstart, int dend) { 4878 if (!mEditor.mAllowUndo) { 4879 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4880 return false; 4881 } 4882 4883 if (mEditor.mUndoManager.isInUndo()) { 4884 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4885 return false; 4886 } 4887 4888 // Text filters run before input operations are applied. However, some input operations 4889 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4890 // attempt to undo invalid operations. 4891 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4892 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4893 return false; 4894 } 4895 4896 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4897 // on an input field. Skip no-op changes. 4898 if (start == end && dstart == dend) { 4899 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4900 return false; 4901 } 4902 4903 return true; 4904 } 4905 4906 private boolean isComposition(CharSequence source) { 4907 if (!(source instanceof Spannable)) { 4908 return false; 4909 } 4910 // This is a composition edit if the source has a non-zero-length composing span. 4911 Spannable text = (Spannable) source; 4912 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4913 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4914 return composeBegin < composeEnd; 4915 } 4916 4917 private boolean isInTextWatcher() { 4918 CharSequence text = mEditor.mTextView.getText(); 4919 return (text instanceof SpannableStringBuilder) 4920 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4921 } 4922 } 4923 4924 /** 4925 * An operation to undo a single "edit" to a text view. 4926 */ 4927 public static class EditOperation extends UndoOperation<Editor> { 4928 private static final int TYPE_INSERT = 0; 4929 private static final int TYPE_DELETE = 1; 4930 private static final int TYPE_REPLACE = 2; 4931 4932 private int mType; 4933 private String mOldText; 4934 private int mOldTextStart; 4935 private String mNewText; 4936 private int mNewTextStart; 4937 4938 private int mOldCursorPos; 4939 private int mNewCursorPos; 4940 4941 /** 4942 * Constructs an edit operation from a text input operation on editor that replaces the 4943 * oldText starting at dstart with newText. 4944 */ 4945 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4946 super(editor.mUndoOwner); 4947 mOldText = oldText; 4948 mNewText = newText; 4949 4950 // Determine the type of the edit and store where it occurred. Avoid storing 4951 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4952 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4953 // outside the bounds of the final text). 4954 if (mNewText.length() > 0 && mOldText.length() == 0) { 4955 mType = TYPE_INSERT; 4956 mNewTextStart = dstart; 4957 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4958 mType = TYPE_DELETE; 4959 mOldTextStart = dstart; 4960 } else { 4961 mType = TYPE_REPLACE; 4962 mOldTextStart = mNewTextStart = dstart; 4963 } 4964 4965 // Store cursor data. 4966 mOldCursorPos = editor.mTextView.getSelectionStart(); 4967 mNewCursorPos = dstart + mNewText.length(); 4968 } 4969 4970 public EditOperation(Parcel src, ClassLoader loader) { 4971 super(src, loader); 4972 mType = src.readInt(); 4973 mOldText = src.readString(); 4974 mOldTextStart = src.readInt(); 4975 mNewText = src.readString(); 4976 mNewTextStart = src.readInt(); 4977 mOldCursorPos = src.readInt(); 4978 mNewCursorPos = src.readInt(); 4979 } 4980 4981 @Override 4982 public void writeToParcel(Parcel dest, int flags) { 4983 dest.writeInt(mType); 4984 dest.writeString(mOldText); 4985 dest.writeInt(mOldTextStart); 4986 dest.writeString(mNewText); 4987 dest.writeInt(mNewTextStart); 4988 dest.writeInt(mOldCursorPos); 4989 dest.writeInt(mNewCursorPos); 4990 } 4991 4992 private int getNewTextEnd() { 4993 return mNewTextStart + mNewText.length(); 4994 } 4995 4996 private int getOldTextEnd() { 4997 return mOldTextStart + mOldText.length(); 4998 } 4999 5000 @Override 5001 public void commit() { 5002 } 5003 5004 @Override 5005 public void undo() { 5006 if (DEBUG_UNDO) Log.d(TAG, "undo"); 5007 // Remove the new text and insert the old. 5008 Editor editor = getOwnerData(); 5009 Editable text = (Editable) editor.mTextView.getText(); 5010 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5011 mOldCursorPos); 5012 } 5013 5014 @Override 5015 public void redo() { 5016 if (DEBUG_UNDO) Log.d(TAG, "redo"); 5017 // Remove the old text and insert the new. 5018 Editor editor = getOwnerData(); 5019 Editable text = (Editable) editor.mTextView.getText(); 5020 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 5021 mNewCursorPos); 5022 } 5023 5024 /** 5025 * Attempts to merge this existing operation with a new edit. 5026 * @param edit The new edit operation. 5027 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 5028 * object unchanged. 5029 */ 5030 private boolean mergeWith(EditOperation edit) { 5031 if (DEBUG_UNDO) { 5032 Log.d(TAG, "mergeWith old " + this); 5033 Log.d(TAG, "mergeWith new " + edit); 5034 } 5035 switch (mType) { 5036 case TYPE_INSERT: 5037 return mergeInsertWith(edit); 5038 case TYPE_DELETE: 5039 return mergeDeleteWith(edit); 5040 case TYPE_REPLACE: 5041 return mergeReplaceWith(edit); 5042 default: 5043 return false; 5044 } 5045 } 5046 5047 private boolean mergeInsertWith(EditOperation edit) { 5048 // Only merge continuous insertions. 5049 if (edit.mType != TYPE_INSERT) { 5050 return false; 5051 } 5052 // Only merge insertions that are contiguous. 5053 if (getNewTextEnd() != edit.mNewTextStart) { 5054 return false; 5055 } 5056 mNewText += edit.mNewText; 5057 mNewCursorPos = edit.mNewCursorPos; 5058 return true; 5059 } 5060 5061 // TODO: Support forward delete. 5062 private boolean mergeDeleteWith(EditOperation edit) { 5063 // Only merge continuous deletes. 5064 if (edit.mType != TYPE_DELETE) { 5065 return false; 5066 } 5067 // Only merge deletions that are contiguous. 5068 if (mOldTextStart != edit.getOldTextEnd()) { 5069 return false; 5070 } 5071 mOldTextStart = edit.mOldTextStart; 5072 mOldText = edit.mOldText + mOldText; 5073 mNewCursorPos = edit.mNewCursorPos; 5074 return true; 5075 } 5076 5077 private boolean mergeReplaceWith(EditOperation edit) { 5078 // Replacements can merge only with adjacent inserts. 5079 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5080 return false; 5081 } 5082 mOldText += edit.mOldText; 5083 mNewText += edit.mNewText; 5084 mNewCursorPos = edit.mNewCursorPos; 5085 return true; 5086 } 5087 5088 /** 5089 * Forcibly creates a single merged edit operation by simulating the entire text 5090 * contents being replaced. 5091 */ 5092 public void forceMergeWith(EditOperation edit) { 5093 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5094 Editor editor = getOwnerData(); 5095 5096 // Copy the text of the current field. 5097 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5098 // but would require two parallel implementations of modifyText() because Editable and 5099 // StringBuilder do not share an interface for replace/delete/insert. 5100 Editable editable = (Editable) editor.mTextView.getText(); 5101 Editable originalText = new SpannableStringBuilder(editable.toString()); 5102 5103 // Roll back the last operation. 5104 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5105 mOldCursorPos); 5106 5107 // Clone the text again and apply the new operation. 5108 Editable finalText = new SpannableStringBuilder(editable.toString()); 5109 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5110 edit.mNewTextStart, edit.mNewCursorPos); 5111 5112 // Convert this operation into a non-mergeable replacement of the entire string. 5113 mType = TYPE_REPLACE; 5114 mNewText = finalText.toString(); 5115 mNewTextStart = 0; 5116 mOldText = originalText.toString(); 5117 mOldTextStart = 0; 5118 mNewCursorPos = edit.mNewCursorPos; 5119 // mOldCursorPos is unchanged. 5120 } 5121 5122 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5123 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5124 // Apply the edit if it is still valid. 5125 if (isValidRange(text, deleteFrom, deleteTo) && 5126 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5127 if (deleteFrom != deleteTo) { 5128 text.delete(deleteFrom, deleteTo); 5129 } 5130 if (newText.length() != 0) { 5131 text.insert(newTextInsertAt, newText); 5132 } 5133 } 5134 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5135 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5136 // TODO: Select all the text that was undone. 5137 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5138 Selection.setSelection(text, newCursorPos); 5139 } 5140 } 5141 5142 private String getTypeString() { 5143 switch (mType) { 5144 case TYPE_INSERT: 5145 return "insert"; 5146 case TYPE_DELETE: 5147 return "delete"; 5148 case TYPE_REPLACE: 5149 return "replace"; 5150 default: 5151 return ""; 5152 } 5153 } 5154 5155 @Override 5156 public String toString() { 5157 return "[mType=" + getTypeString() + ", " + 5158 "mOldText=" + mOldText + ", " + 5159 "mOldTextStart=" + mOldTextStart + ", " + 5160 "mNewText=" + mNewText + ", " + 5161 "mNewTextStart=" + mNewTextStart + ", " + 5162 "mOldCursorPos=" + mOldCursorPos + ", " + 5163 "mNewCursorPos=" + mNewCursorPos + "]"; 5164 } 5165 5166 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5167 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5168 @Override 5169 public EditOperation createFromParcel(Parcel in) { 5170 return new EditOperation(in, null); 5171 } 5172 5173 @Override 5174 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5175 return new EditOperation(in, loader); 5176 } 5177 5178 @Override 5179 public EditOperation[] newArray(int size) { 5180 return new EditOperation[size]; 5181 } 5182 }; 5183 } 5184} 5185