Editor.java revision eb665337162416c4754a9f11005004a8d936775e
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 selectCurrentWordAndStartDrag(); 1008 } 1009 handled = true; 1010 } 1011 1012 // Start a new selection 1013 if (!handled) { 1014 handled = selectCurrentWordAndStartDrag(); 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 ensures the selection handles 1728 * are shown if there is a selection, otherwise the insertion handle is shown. This should be 1729 * used when the mode is started from a non-touch event. 1730 * 1731 * @return true if the selection mode was actually started. 1732 */ 1733 boolean startSelectionActionModeWithSelection() { 1734 boolean selectionStarted = startSelectionActionModeWithSelectionInternal(); 1735 if (selectionStarted) { 1736 getSelectionController().show(); 1737 } else if (getInsertionController() != null) { 1738 getInsertionController().show(); 1739 } 1740 return selectionStarted; 1741 } 1742 1743 /** 1744 * If the TextView allows text selection, selects the current word when no existing selection 1745 * was available and starts a drag. 1746 * 1747 * @return true if the drag was started. 1748 */ 1749 private boolean selectCurrentWordAndStartDrag() { 1750 if (extractedTextModeWillBeStarted()) { 1751 // Cancel the single tap delayed runnable. 1752 if (mSelectionModeWithoutSelectionRunnable != null) { 1753 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 1754 } 1755 return false; 1756 } 1757 if (mSelectionActionMode != null) { 1758 mSelectionActionMode.finish(); 1759 } 1760 if (!checkFieldAndSelectCurrentWord()) { 1761 return false; 1762 } 1763 getSelectionController().enterDrag(); 1764 return true; 1765 } 1766 1767 /** 1768 * Checks whether a selection can be performed on the current TextView and if so selects 1769 * the current word. 1770 * 1771 * @return true if there already was a selection or if the current word was selected. 1772 */ 1773 private boolean checkFieldAndSelectCurrentWord() { 1774 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1775 Log.w(TextView.LOG_TAG, 1776 "TextView does not support text selection. Selection cancelled."); 1777 return false; 1778 } 1779 1780 if (!mTextView.hasSelection()) { 1781 // There may already be a selection on device rotation 1782 return selectCurrentWord(); 1783 } 1784 return true; 1785 } 1786 1787 private boolean startSelectionActionModeWithSelectionInternal() { 1788 if (mSelectionActionMode != null) { 1789 // Selection action mode is already started 1790 mSelectionActionMode.invalidate(); 1791 return false; 1792 } 1793 1794 if (!checkFieldAndSelectCurrentWord()) { 1795 return false; 1796 } 1797 1798 boolean willExtract = extractedTextModeWillBeStarted(); 1799 1800 // Do not start the action mode when extracted text will show up full screen, which would 1801 // immediately hide the newly created action bar and would be visually distracting. 1802 if (!willExtract) { 1803 ActionMode.Callback actionModeCallback = new SelectionActionModeCallback(); 1804 mSelectionActionMode = mTextView.startActionMode( 1805 actionModeCallback, ActionMode.TYPE_FLOATING); 1806 } 1807 1808 final boolean selectionStarted = mSelectionActionMode != null || willExtract; 1809 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1810 // Show the IME to be able to replace text, except when selecting non editable text. 1811 final InputMethodManager imm = InputMethodManager.peekInstance(); 1812 if (imm != null) { 1813 imm.showSoftInput(mTextView, 0, null); 1814 } 1815 } 1816 return selectionStarted; 1817 } 1818 1819 private boolean extractedTextModeWillBeStarted() { 1820 if (!(mTextView instanceof ExtractEditText)) { 1821 final InputMethodManager imm = InputMethodManager.peekInstance(); 1822 return imm != null && imm.isFullscreenMode(); 1823 } 1824 return false; 1825 } 1826 1827 /** 1828 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1829 * the current cursor position or selection range. This method is consistent with the 1830 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1831 */ 1832 private boolean shouldOfferToShowSuggestions() { 1833 CharSequence text = mTextView.getText(); 1834 if (!(text instanceof Spannable)) return false; 1835 1836 final Spannable spannable = (Spannable) text; 1837 final int selectionStart = mTextView.getSelectionStart(); 1838 final int selectionEnd = mTextView.getSelectionEnd(); 1839 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1840 SuggestionSpan.class); 1841 if (suggestionSpans.length == 0) { 1842 return false; 1843 } 1844 if (selectionStart == selectionEnd) { 1845 // Spans overlap the cursor. 1846 return true; 1847 } 1848 int minSpanStart = mTextView.getText().length(); 1849 int maxSpanEnd = 0; 1850 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1851 int unionOfSpansCoveringSelectionStartEnd = 0; 1852 for (int i = 0; i < suggestionSpans.length; i++) { 1853 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1854 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1855 minSpanStart = Math.min(minSpanStart, spanStart); 1856 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1857 if (selectionStart < spanStart || selectionStart > spanEnd) { 1858 // The span doesn't cover the current selection start point. 1859 continue; 1860 } 1861 unionOfSpansCoveringSelectionStartStart = 1862 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1863 unionOfSpansCoveringSelectionStartEnd = 1864 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1865 } 1866 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1867 // No spans cover the selection start point. 1868 return false; 1869 } 1870 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1871 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1872 // There is a span that is not covered by the union. In this case, we soouldn't offer 1873 // to show suggestions as it's confusing. 1874 return false; 1875 } 1876 return true; 1877 } 1878 1879 /** 1880 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1881 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1882 */ 1883 private boolean isCursorInsideEasyCorrectionSpan() { 1884 Spannable spannable = (Spannable) mTextView.getText(); 1885 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1886 mTextView.getSelectionEnd(), SuggestionSpan.class); 1887 for (int i = 0; i < suggestionSpans.length; i++) { 1888 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1889 return true; 1890 } 1891 } 1892 return false; 1893 } 1894 1895 void onTouchUpEvent(MotionEvent event) { 1896 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1897 hideControllers(); 1898 stopSelectionActionMode(); 1899 CharSequence text = mTextView.getText(); 1900 if (!selectAllGotFocus && text.length() > 0) { 1901 // Move cursor 1902 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1903 Selection.setSelection((Spannable) text, offset); 1904 if (mSpellChecker != null) { 1905 // When the cursor moves, the word that was typed may need spell check 1906 mSpellChecker.onSelectionChanged(); 1907 } 1908 1909 if (!extractedTextModeWillBeStarted()) { 1910 if (isCursorInsideEasyCorrectionSpan()) { 1911 // Cancel the single tap delayed runnable. 1912 if (mSelectionModeWithoutSelectionRunnable != null) { 1913 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 1914 } 1915 1916 mShowSuggestionRunnable = new Runnable() { 1917 public void run() { 1918 showSuggestions(); 1919 } 1920 }; 1921 // removeCallbacks is performed on every touch 1922 mTextView.postDelayed(mShowSuggestionRunnable, 1923 ViewConfiguration.getDoubleTapTimeout()); 1924 } else if (hasInsertionController()) { 1925 getInsertionController().show(); 1926 } 1927 } 1928 } 1929 } 1930 1931 protected void stopSelectionActionMode() { 1932 if (mSelectionActionMode != null) { 1933 // This will hide the mSelectionModifierCursorController 1934 mSelectionActionMode.finish(); 1935 } 1936 } 1937 1938 /** 1939 * @return True if this view supports insertion handles. 1940 */ 1941 boolean hasInsertionController() { 1942 return mInsertionControllerEnabled; 1943 } 1944 1945 /** 1946 * @return True if this view supports selection handles. 1947 */ 1948 boolean hasSelectionController() { 1949 return mSelectionControllerEnabled; 1950 } 1951 1952 InsertionPointCursorController getInsertionController() { 1953 if (!mInsertionControllerEnabled) { 1954 return null; 1955 } 1956 1957 if (mInsertionPointCursorController == null) { 1958 mInsertionPointCursorController = new InsertionPointCursorController(); 1959 1960 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1961 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1962 } 1963 1964 return mInsertionPointCursorController; 1965 } 1966 1967 SelectionModifierCursorController getSelectionController() { 1968 if (!mSelectionControllerEnabled) { 1969 return null; 1970 } 1971 1972 if (mSelectionModifierCursorController == null) { 1973 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1974 1975 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1976 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1977 } 1978 1979 return mSelectionModifierCursorController; 1980 } 1981 1982 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 1983 if (mCursorDrawable[cursorIndex] == null) 1984 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 1985 mTextView.mCursorDrawableRes); 1986 1987 if (mTempRect == null) mTempRect = new Rect(); 1988 mCursorDrawable[cursorIndex].getPadding(mTempRect); 1989 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 1990 horizontal = Math.max(0.5f, horizontal - 0.5f); 1991 final int left = (int) (horizontal) - mTempRect.left; 1992 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 1993 bottom + mTempRect.bottom); 1994 } 1995 1996 /** 1997 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 1998 * a dictionary) from the current input method, provided by it calling 1999 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2000 * implementation flashes the background of the corrected word to provide feedback to the user. 2001 * 2002 * @param info The auto correct info about the text that was corrected. 2003 */ 2004 public void onCommitCorrection(CorrectionInfo info) { 2005 if (mCorrectionHighlighter == null) { 2006 mCorrectionHighlighter = new CorrectionHighlighter(); 2007 } else { 2008 mCorrectionHighlighter.invalidate(false); 2009 } 2010 2011 mCorrectionHighlighter.highlight(info); 2012 } 2013 2014 void showSuggestions() { 2015 if (mSuggestionsPopupWindow == null) { 2016 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 2017 } 2018 hideControllers(); 2019 stopSelectionActionMode(); 2020 mSuggestionsPopupWindow.show(); 2021 } 2022 2023 void onScrollChanged() { 2024 if (mPositionListener != null) { 2025 mPositionListener.onScrollChanged(); 2026 } 2027 if (mSelectionActionMode != null) { 2028 mSelectionActionMode.invalidateContentRect(); 2029 } 2030 } 2031 2032 /** 2033 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2034 */ 2035 private boolean shouldBlink() { 2036 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2037 2038 final int start = mTextView.getSelectionStart(); 2039 if (start < 0) return false; 2040 2041 final int end = mTextView.getSelectionEnd(); 2042 if (end < 0) return false; 2043 2044 return start == end; 2045 } 2046 2047 void makeBlink() { 2048 if (shouldBlink()) { 2049 mShowCursor = SystemClock.uptimeMillis(); 2050 if (mBlink == null) mBlink = new Blink(); 2051 mBlink.removeCallbacks(mBlink); 2052 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 2053 } else { 2054 if (mBlink != null) mBlink.removeCallbacks(mBlink); 2055 } 2056 } 2057 2058 private class Blink extends Handler implements Runnable { 2059 private boolean mCancelled; 2060 2061 public void run() { 2062 if (mCancelled) { 2063 return; 2064 } 2065 2066 removeCallbacks(Blink.this); 2067 2068 if (shouldBlink()) { 2069 if (mTextView.getLayout() != null) { 2070 mTextView.invalidateCursorPath(); 2071 } 2072 2073 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 2074 } 2075 } 2076 2077 void cancel() { 2078 if (!mCancelled) { 2079 removeCallbacks(Blink.this); 2080 mCancelled = true; 2081 } 2082 } 2083 2084 void uncancel() { 2085 mCancelled = false; 2086 } 2087 } 2088 2089 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 2090 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2091 com.android.internal.R.layout.text_drag_thumbnail, null); 2092 2093 if (shadowView == null) { 2094 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2095 } 2096 2097 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2098 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2099 } 2100 shadowView.setText(text); 2101 shadowView.setTextColor(mTextView.getTextColors()); 2102 2103 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2104 shadowView.setGravity(Gravity.CENTER); 2105 2106 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2107 ViewGroup.LayoutParams.WRAP_CONTENT)); 2108 2109 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2110 shadowView.measure(size, size); 2111 2112 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2113 shadowView.invalidate(); 2114 return new DragShadowBuilder(shadowView); 2115 } 2116 2117 private static class DragLocalState { 2118 public TextView sourceTextView; 2119 public int start, end; 2120 2121 public DragLocalState(TextView sourceTextView, int start, int end) { 2122 this.sourceTextView = sourceTextView; 2123 this.start = start; 2124 this.end = end; 2125 } 2126 } 2127 2128 void onDrop(DragEvent event) { 2129 StringBuilder content = new StringBuilder(""); 2130 ClipData clipData = event.getClipData(); 2131 final int itemCount = clipData.getItemCount(); 2132 for (int i=0; i < itemCount; i++) { 2133 Item item = clipData.getItemAt(i); 2134 content.append(item.coerceToStyledText(mTextView.getContext())); 2135 } 2136 2137 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2138 2139 Object localState = event.getLocalState(); 2140 DragLocalState dragLocalState = null; 2141 if (localState instanceof DragLocalState) { 2142 dragLocalState = (DragLocalState) localState; 2143 } 2144 boolean dragDropIntoItself = dragLocalState != null && 2145 dragLocalState.sourceTextView == mTextView; 2146 2147 if (dragDropIntoItself) { 2148 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2149 // A drop inside the original selection discards the drop. 2150 return; 2151 } 2152 } 2153 2154 final int originalLength = mTextView.getText().length(); 2155 int min = offset; 2156 int max = offset; 2157 2158 Selection.setSelection((Spannable) mTextView.getText(), max); 2159 mTextView.replaceText_internal(min, max, content); 2160 2161 if (dragDropIntoItself) { 2162 int dragSourceStart = dragLocalState.start; 2163 int dragSourceEnd = dragLocalState.end; 2164 if (max <= dragSourceStart) { 2165 // Inserting text before selection has shifted positions 2166 final int shift = mTextView.getText().length() - originalLength; 2167 dragSourceStart += shift; 2168 dragSourceEnd += shift; 2169 } 2170 2171 // Delete original selection 2172 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2173 2174 // Make sure we do not leave two adjacent spaces. 2175 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2176 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2177 if (nextCharIdx > prevCharIdx + 1) { 2178 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2179 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2180 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2181 } 2182 } 2183 } 2184 } 2185 2186 public void addSpanWatchers(Spannable text) { 2187 final int textLength = text.length(); 2188 2189 if (mKeyListener != null) { 2190 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2191 } 2192 2193 if (mSpanController == null) { 2194 mSpanController = new SpanController(); 2195 } 2196 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2197 } 2198 2199 /** 2200 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2201 * pop-up should be displayed. 2202 * Also monitors {@link Selection} to call back to the attached input method. 2203 */ 2204 class SpanController implements SpanWatcher { 2205 2206 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2207 2208 private EasyEditPopupWindow mPopupWindow; 2209 2210 private Runnable mHidePopup; 2211 2212 // This function is pure but inner classes can't have static functions 2213 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2214 final Object span) { 2215 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2216 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2217 } 2218 2219 @Override 2220 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2221 if (isNonIntermediateSelectionSpan(text, span)) { 2222 sendUpdateSelection(); 2223 } else if (span instanceof EasyEditSpan) { 2224 if (mPopupWindow == null) { 2225 mPopupWindow = new EasyEditPopupWindow(); 2226 mHidePopup = new Runnable() { 2227 @Override 2228 public void run() { 2229 hide(); 2230 } 2231 }; 2232 } 2233 2234 // Make sure there is only at most one EasyEditSpan in the text 2235 if (mPopupWindow.mEasyEditSpan != null) { 2236 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2237 } 2238 2239 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2240 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2241 @Override 2242 public void onDeleteClick(EasyEditSpan span) { 2243 Editable editable = (Editable) mTextView.getText(); 2244 int start = editable.getSpanStart(span); 2245 int end = editable.getSpanEnd(span); 2246 if (start >= 0 && end >= 0) { 2247 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2248 mTextView.deleteText_internal(start, end); 2249 } 2250 editable.removeSpan(span); 2251 } 2252 }); 2253 2254 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2255 // The window is not visible yet, ignore the text change. 2256 return; 2257 } 2258 2259 if (mTextView.getLayout() == null) { 2260 // The view has not been laid out yet, ignore the text change 2261 return; 2262 } 2263 2264 if (extractedTextModeWillBeStarted()) { 2265 // The input is in extract mode. Do not handle the easy edit in 2266 // the original TextView, as the ExtractEditText will do 2267 return; 2268 } 2269 2270 mPopupWindow.show(); 2271 mTextView.removeCallbacks(mHidePopup); 2272 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2273 } 2274 } 2275 2276 @Override 2277 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2278 if (isNonIntermediateSelectionSpan(text, span)) { 2279 sendUpdateSelection(); 2280 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2281 hide(); 2282 } 2283 } 2284 2285 @Override 2286 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2287 int newStart, int newEnd) { 2288 if (isNonIntermediateSelectionSpan(text, span)) { 2289 sendUpdateSelection(); 2290 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2291 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2292 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2293 text.removeSpan(easyEditSpan); 2294 } 2295 } 2296 2297 public void hide() { 2298 if (mPopupWindow != null) { 2299 mPopupWindow.hide(); 2300 mTextView.removeCallbacks(mHidePopup); 2301 } 2302 } 2303 2304 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2305 try { 2306 PendingIntent pendingIntent = span.getPendingIntent(); 2307 if (pendingIntent != null) { 2308 Intent intent = new Intent(); 2309 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2310 pendingIntent.send(mTextView.getContext(), 0, intent); 2311 } 2312 } catch (CanceledException e) { 2313 // This should not happen, as we should try to send the intent only once. 2314 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2315 } 2316 } 2317 } 2318 2319 /** 2320 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2321 */ 2322 private interface EasyEditDeleteListener { 2323 2324 /** 2325 * Clicks the delete pop-up. 2326 */ 2327 void onDeleteClick(EasyEditSpan span); 2328 } 2329 2330 /** 2331 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2332 * by {@link SpanController}. 2333 */ 2334 private class EasyEditPopupWindow extends PinnedPopupWindow 2335 implements OnClickListener { 2336 private static final int POPUP_TEXT_LAYOUT = 2337 com.android.internal.R.layout.text_edit_action_popup_text; 2338 private TextView mDeleteTextView; 2339 private EasyEditSpan mEasyEditSpan; 2340 private EasyEditDeleteListener mOnDeleteListener; 2341 2342 @Override 2343 protected void createPopupWindow() { 2344 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2345 com.android.internal.R.attr.textSelectHandleWindowStyle); 2346 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2347 mPopupWindow.setClippingEnabled(true); 2348 } 2349 2350 @Override 2351 protected void initContentView() { 2352 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2353 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2354 mContentView = linearLayout; 2355 mContentView.setBackgroundResource( 2356 com.android.internal.R.drawable.text_edit_side_paste_window); 2357 2358 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2359 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2360 2361 LayoutParams wrapContent = new LayoutParams( 2362 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2363 2364 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2365 mDeleteTextView.setLayoutParams(wrapContent); 2366 mDeleteTextView.setText(com.android.internal.R.string.delete); 2367 mDeleteTextView.setOnClickListener(this); 2368 mContentView.addView(mDeleteTextView); 2369 } 2370 2371 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2372 mEasyEditSpan = easyEditSpan; 2373 } 2374 2375 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2376 mOnDeleteListener = listener; 2377 } 2378 2379 @Override 2380 public void onClick(View view) { 2381 if (view == mDeleteTextView 2382 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2383 && mOnDeleteListener != null) { 2384 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2385 } 2386 } 2387 2388 @Override 2389 public void hide() { 2390 if (mEasyEditSpan != null) { 2391 mEasyEditSpan.setDeleteEnabled(false); 2392 } 2393 mOnDeleteListener = null; 2394 super.hide(); 2395 } 2396 2397 @Override 2398 protected int getTextOffset() { 2399 // Place the pop-up at the end of the span 2400 Editable editable = (Editable) mTextView.getText(); 2401 return editable.getSpanEnd(mEasyEditSpan); 2402 } 2403 2404 @Override 2405 protected int getVerticalLocalPosition(int line) { 2406 return mTextView.getLayout().getLineBottom(line); 2407 } 2408 2409 @Override 2410 protected int clipVertically(int positionY) { 2411 // As we display the pop-up below the span, no vertical clipping is required. 2412 return positionY; 2413 } 2414 } 2415 2416 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2417 // 3 handles 2418 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2419 // 1 CursorAnchorInfoNotifier 2420 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2421 private TextViewPositionListener[] mPositionListeners = 2422 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2423 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2424 private boolean mPositionHasChanged = true; 2425 // Absolute position of the TextView with respect to its parent window 2426 private int mPositionX, mPositionY; 2427 private int mNumberOfListeners; 2428 private boolean mScrollHasChanged; 2429 final int[] mTempCoords = new int[2]; 2430 2431 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2432 if (mNumberOfListeners == 0) { 2433 updatePosition(); 2434 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2435 vto.addOnPreDrawListener(this); 2436 } 2437 2438 int emptySlotIndex = -1; 2439 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2440 TextViewPositionListener listener = mPositionListeners[i]; 2441 if (listener == positionListener) { 2442 return; 2443 } else if (emptySlotIndex < 0 && listener == null) { 2444 emptySlotIndex = i; 2445 } 2446 } 2447 2448 mPositionListeners[emptySlotIndex] = positionListener; 2449 mCanMove[emptySlotIndex] = canMove; 2450 mNumberOfListeners++; 2451 } 2452 2453 public void removeSubscriber(TextViewPositionListener positionListener) { 2454 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2455 if (mPositionListeners[i] == positionListener) { 2456 mPositionListeners[i] = null; 2457 mNumberOfListeners--; 2458 break; 2459 } 2460 } 2461 2462 if (mNumberOfListeners == 0) { 2463 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2464 vto.removeOnPreDrawListener(this); 2465 } 2466 } 2467 2468 public int getPositionX() { 2469 return mPositionX; 2470 } 2471 2472 public int getPositionY() { 2473 return mPositionY; 2474 } 2475 2476 @Override 2477 public boolean onPreDraw() { 2478 updatePosition(); 2479 2480 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2481 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2482 TextViewPositionListener positionListener = mPositionListeners[i]; 2483 if (positionListener != null) { 2484 positionListener.updatePosition(mPositionX, mPositionY, 2485 mPositionHasChanged, mScrollHasChanged); 2486 } 2487 } 2488 } 2489 2490 mScrollHasChanged = false; 2491 return true; 2492 } 2493 2494 private void updatePosition() { 2495 mTextView.getLocationInWindow(mTempCoords); 2496 2497 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2498 2499 mPositionX = mTempCoords[0]; 2500 mPositionY = mTempCoords[1]; 2501 } 2502 2503 public void onScrollChanged() { 2504 mScrollHasChanged = true; 2505 } 2506 } 2507 2508 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2509 protected PopupWindow mPopupWindow; 2510 protected ViewGroup mContentView; 2511 int mPositionX, mPositionY; 2512 2513 protected abstract void createPopupWindow(); 2514 protected abstract void initContentView(); 2515 protected abstract int getTextOffset(); 2516 protected abstract int getVerticalLocalPosition(int line); 2517 protected abstract int clipVertically(int positionY); 2518 2519 public PinnedPopupWindow() { 2520 createPopupWindow(); 2521 2522 mPopupWindow.setWindowLayoutType( 2523 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2524 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2525 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2526 2527 initContentView(); 2528 2529 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2530 ViewGroup.LayoutParams.WRAP_CONTENT); 2531 mContentView.setLayoutParams(wrapContent); 2532 2533 mPopupWindow.setContentView(mContentView); 2534 } 2535 2536 public void show() { 2537 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2538 2539 computeLocalPosition(); 2540 2541 final PositionListener positionListener = getPositionListener(); 2542 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2543 } 2544 2545 protected void measureContent() { 2546 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2547 mContentView.measure( 2548 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2549 View.MeasureSpec.AT_MOST), 2550 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2551 View.MeasureSpec.AT_MOST)); 2552 } 2553 2554 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2555 * positioned according to viewportToContentHorizontalOffset. 2556 * 2557 * This method assumes that mContentView has properly been measured from its content. */ 2558 private void computeLocalPosition() { 2559 measureContent(); 2560 final int width = mContentView.getMeasuredWidth(); 2561 final int offset = getTextOffset(); 2562 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2563 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2564 2565 final int line = mTextView.getLayout().getLineForOffset(offset); 2566 mPositionY = getVerticalLocalPosition(line); 2567 mPositionY += mTextView.viewportToContentVerticalOffset(); 2568 } 2569 2570 private void updatePosition(int parentPositionX, int parentPositionY) { 2571 int positionX = parentPositionX + mPositionX; 2572 int positionY = parentPositionY + mPositionY; 2573 2574 positionY = clipVertically(positionY); 2575 2576 // Horizontal clipping 2577 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2578 final int width = mContentView.getMeasuredWidth(); 2579 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2580 positionX = Math.max(0, positionX); 2581 2582 if (isShowing()) { 2583 mPopupWindow.update(positionX, positionY, -1, -1); 2584 } else { 2585 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2586 positionX, positionY); 2587 } 2588 } 2589 2590 public void hide() { 2591 mPopupWindow.dismiss(); 2592 getPositionListener().removeSubscriber(this); 2593 } 2594 2595 @Override 2596 public void updatePosition(int parentPositionX, int parentPositionY, 2597 boolean parentPositionChanged, boolean parentScrolled) { 2598 // Either parentPositionChanged or parentScrolled is true, check if still visible 2599 if (isShowing() && isOffsetVisible(getTextOffset())) { 2600 if (parentScrolled) computeLocalPosition(); 2601 updatePosition(parentPositionX, parentPositionY); 2602 } else { 2603 hide(); 2604 } 2605 } 2606 2607 public boolean isShowing() { 2608 return mPopupWindow.isShowing(); 2609 } 2610 } 2611 2612 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2613 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2614 private static final int ADD_TO_DICTIONARY = -1; 2615 private static final int DELETE_TEXT = -2; 2616 private SuggestionInfo[] mSuggestionInfos; 2617 private int mNumberOfSuggestions; 2618 private boolean mCursorWasVisibleBeforeSuggestions; 2619 private boolean mIsShowingUp = false; 2620 private SuggestionAdapter mSuggestionsAdapter; 2621 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2622 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2623 2624 private class CustomPopupWindow extends PopupWindow { 2625 public CustomPopupWindow(Context context, int defStyleAttr) { 2626 super(context, null, defStyleAttr); 2627 } 2628 2629 @Override 2630 public void dismiss() { 2631 super.dismiss(); 2632 2633 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2634 2635 // Safe cast since show() checks that mTextView.getText() is an Editable 2636 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2637 2638 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2639 if (hasInsertionController()) { 2640 getInsertionController().show(); 2641 } 2642 } 2643 } 2644 2645 public SuggestionsPopupWindow() { 2646 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2647 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2648 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2649 } 2650 2651 @Override 2652 protected void createPopupWindow() { 2653 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2654 com.android.internal.R.attr.textSuggestionsWindowStyle); 2655 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2656 mPopupWindow.setFocusable(true); 2657 mPopupWindow.setClippingEnabled(false); 2658 } 2659 2660 @Override 2661 protected void initContentView() { 2662 ListView listView = new ListView(mTextView.getContext()); 2663 mSuggestionsAdapter = new SuggestionAdapter(); 2664 listView.setAdapter(mSuggestionsAdapter); 2665 listView.setOnItemClickListener(this); 2666 mContentView = listView; 2667 2668 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2669 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2670 for (int i = 0; i < mSuggestionInfos.length; i++) { 2671 mSuggestionInfos[i] = new SuggestionInfo(); 2672 } 2673 } 2674 2675 public boolean isShowingUp() { 2676 return mIsShowingUp; 2677 } 2678 2679 public void onParentLostFocus() { 2680 mIsShowingUp = false; 2681 } 2682 2683 private class SuggestionInfo { 2684 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2685 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2686 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2687 SpannableStringBuilder text = new SpannableStringBuilder(); 2688 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2689 android.R.style.TextAppearance_SuggestionHighlight); 2690 } 2691 2692 private class SuggestionAdapter extends BaseAdapter { 2693 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2694 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2695 2696 @Override 2697 public int getCount() { 2698 return mNumberOfSuggestions; 2699 } 2700 2701 @Override 2702 public Object getItem(int position) { 2703 return mSuggestionInfos[position]; 2704 } 2705 2706 @Override 2707 public long getItemId(int position) { 2708 return position; 2709 } 2710 2711 @Override 2712 public View getView(int position, View convertView, ViewGroup parent) { 2713 TextView textView = (TextView) convertView; 2714 2715 if (textView == null) { 2716 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2717 parent, false); 2718 } 2719 2720 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2721 textView.setText(suggestionInfo.text); 2722 2723 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2724 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2725 textView.setBackgroundColor(Color.TRANSPARENT); 2726 } else { 2727 textView.setBackgroundColor(Color.WHITE); 2728 } 2729 2730 return textView; 2731 } 2732 } 2733 2734 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2735 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2736 final int flag1 = span1.getFlags(); 2737 final int flag2 = span2.getFlags(); 2738 if (flag1 != flag2) { 2739 // The order here should match what is used in updateDrawState 2740 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2741 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2742 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2743 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2744 if (easy1 && !misspelled1) return -1; 2745 if (easy2 && !misspelled2) return 1; 2746 if (misspelled1) return -1; 2747 if (misspelled2) return 1; 2748 } 2749 2750 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2751 } 2752 } 2753 2754 /** 2755 * Returns the suggestion spans that cover the current cursor position. The suggestion 2756 * spans are sorted according to the length of text that they are attached to. 2757 */ 2758 private SuggestionSpan[] getSuggestionSpans() { 2759 int pos = mTextView.getSelectionStart(); 2760 Spannable spannable = (Spannable) mTextView.getText(); 2761 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2762 2763 mSpansLengths.clear(); 2764 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2765 int start = spannable.getSpanStart(suggestionSpan); 2766 int end = spannable.getSpanEnd(suggestionSpan); 2767 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2768 } 2769 2770 // The suggestions are sorted according to their types (easy correction first, then 2771 // misspelled) and to the length of the text that they cover (shorter first). 2772 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2773 return suggestionSpans; 2774 } 2775 2776 @Override 2777 public void show() { 2778 if (!(mTextView.getText() instanceof Editable)) return; 2779 2780 if (updateSuggestions()) { 2781 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2782 mTextView.setCursorVisible(false); 2783 mIsShowingUp = true; 2784 super.show(); 2785 } 2786 } 2787 2788 @Override 2789 protected void measureContent() { 2790 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2791 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2792 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2793 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2794 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2795 2796 int width = 0; 2797 View view = null; 2798 for (int i = 0; i < mNumberOfSuggestions; i++) { 2799 view = mSuggestionsAdapter.getView(i, view, mContentView); 2800 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2801 view.measure(horizontalMeasure, verticalMeasure); 2802 width = Math.max(width, view.getMeasuredWidth()); 2803 } 2804 2805 // Enforce the width based on actual text widths 2806 mContentView.measure( 2807 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2808 verticalMeasure); 2809 2810 Drawable popupBackground = mPopupWindow.getBackground(); 2811 if (popupBackground != null) { 2812 if (mTempRect == null) mTempRect = new Rect(); 2813 popupBackground.getPadding(mTempRect); 2814 width += mTempRect.left + mTempRect.right; 2815 } 2816 mPopupWindow.setWidth(width); 2817 } 2818 2819 @Override 2820 protected int getTextOffset() { 2821 return mTextView.getSelectionStart(); 2822 } 2823 2824 @Override 2825 protected int getVerticalLocalPosition(int line) { 2826 return mTextView.getLayout().getLineBottom(line); 2827 } 2828 2829 @Override 2830 protected int clipVertically(int positionY) { 2831 final int height = mContentView.getMeasuredHeight(); 2832 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2833 return Math.min(positionY, displayMetrics.heightPixels - height); 2834 } 2835 2836 @Override 2837 public void hide() { 2838 super.hide(); 2839 } 2840 2841 private boolean updateSuggestions() { 2842 Spannable spannable = (Spannable) mTextView.getText(); 2843 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2844 2845 final int nbSpans = suggestionSpans.length; 2846 // Suggestions are shown after a delay: the underlying spans may have been removed 2847 if (nbSpans == 0) return false; 2848 2849 mNumberOfSuggestions = 0; 2850 int spanUnionStart = mTextView.getText().length(); 2851 int spanUnionEnd = 0; 2852 2853 SuggestionSpan misspelledSpan = null; 2854 int underlineColor = 0; 2855 2856 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2857 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2858 final int spanStart = spannable.getSpanStart(suggestionSpan); 2859 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2860 spanUnionStart = Math.min(spanStart, spanUnionStart); 2861 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2862 2863 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2864 misspelledSpan = suggestionSpan; 2865 } 2866 2867 // The first span dictates the background color of the highlighted text 2868 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2869 2870 String[] suggestions = suggestionSpan.getSuggestions(); 2871 int nbSuggestions = suggestions.length; 2872 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2873 String suggestion = suggestions[suggestionIndex]; 2874 2875 boolean suggestionIsDuplicate = false; 2876 for (int i = 0; i < mNumberOfSuggestions; i++) { 2877 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2878 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2879 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2880 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2881 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2882 suggestionIsDuplicate = true; 2883 break; 2884 } 2885 } 2886 } 2887 2888 if (!suggestionIsDuplicate) { 2889 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2890 suggestionInfo.suggestionSpan = suggestionSpan; 2891 suggestionInfo.suggestionIndex = suggestionIndex; 2892 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2893 2894 mNumberOfSuggestions++; 2895 2896 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2897 // Also end outer for loop 2898 spanIndex = nbSpans; 2899 break; 2900 } 2901 } 2902 } 2903 } 2904 2905 for (int i = 0; i < mNumberOfSuggestions; i++) { 2906 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2907 } 2908 2909 // Add "Add to dictionary" item if there is a span with the misspelled flag 2910 if (misspelledSpan != null) { 2911 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2912 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2913 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2914 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2915 suggestionInfo.suggestionSpan = misspelledSpan; 2916 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2917 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2918 getContext().getString(com.android.internal.R.string.addToDictionary)); 2919 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2920 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2921 2922 mNumberOfSuggestions++; 2923 } 2924 } 2925 2926 // Delete item 2927 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2928 suggestionInfo.suggestionSpan = null; 2929 suggestionInfo.suggestionIndex = DELETE_TEXT; 2930 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2931 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2932 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2933 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2934 mNumberOfSuggestions++; 2935 2936 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2937 if (underlineColor == 0) { 2938 // Fallback on the default highlight color when the first span does not provide one 2939 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2940 } else { 2941 final float BACKGROUND_TRANSPARENCY = 0.4f; 2942 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2943 mSuggestionRangeSpan.setBackgroundColor( 2944 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2945 } 2946 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2947 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2948 2949 mSuggestionsAdapter.notifyDataSetChanged(); 2950 return true; 2951 } 2952 2953 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2954 int unionEnd) { 2955 final Spannable text = (Spannable) mTextView.getText(); 2956 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2957 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2958 2959 // Adjust the start/end of the suggestion span 2960 suggestionInfo.suggestionStart = spanStart - unionStart; 2961 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2962 + suggestionInfo.text.length(); 2963 2964 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2965 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2966 2967 // Add the text before and after the span. 2968 final String textAsString = text.toString(); 2969 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2970 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2971 } 2972 2973 @Override 2974 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2975 Editable editable = (Editable) mTextView.getText(); 2976 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2977 2978 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2979 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2980 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 2981 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 2982 // Do not leave two adjacent spaces after deletion, or one at beginning of text 2983 if (spanUnionEnd < editable.length() && 2984 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 2985 (spanUnionStart == 0 || 2986 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 2987 spanUnionEnd = spanUnionEnd + 1; 2988 } 2989 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 2990 } 2991 hide(); 2992 return; 2993 } 2994 2995 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 2996 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 2997 if (spanStart < 0 || spanEnd <= spanStart) { 2998 // Span has been removed 2999 hide(); 3000 return; 3001 } 3002 3003 final String originalText = editable.toString().substring(spanStart, spanEnd); 3004 3005 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 3006 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3007 intent.putExtra("word", originalText); 3008 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 3009 // Put a listener to replace the original text with a word which the user 3010 // modified in a user dictionary dialog. 3011 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3012 mTextView.getContext().startActivity(intent); 3013 // There is no way to know if the word was indeed added. Re-check. 3014 // TODO The ExtractEditText should remove the span in the original text instead 3015 editable.removeSpan(suggestionInfo.suggestionSpan); 3016 Selection.setSelection(editable, spanEnd); 3017 updateSpellCheckSpans(spanStart, spanEnd, false); 3018 } else { 3019 // SuggestionSpans are removed by replace: save them before 3020 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 3021 SuggestionSpan.class); 3022 final int length = suggestionSpans.length; 3023 int[] suggestionSpansStarts = new int[length]; 3024 int[] suggestionSpansEnds = new int[length]; 3025 int[] suggestionSpansFlags = new int[length]; 3026 for (int i = 0; i < length; i++) { 3027 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 3028 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 3029 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 3030 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 3031 3032 // Remove potential misspelled flags 3033 int suggestionSpanFlags = suggestionSpan.getFlags(); 3034 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 3035 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 3036 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 3037 suggestionSpan.setFlags(suggestionSpanFlags); 3038 } 3039 } 3040 3041 final int suggestionStart = suggestionInfo.suggestionStart; 3042 final int suggestionEnd = suggestionInfo.suggestionEnd; 3043 final String suggestion = suggestionInfo.text.subSequence( 3044 suggestionStart, suggestionEnd).toString(); 3045 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 3046 3047 // Notify source IME of the suggestion pick. Do this before 3048 // swaping texts. 3049 suggestionInfo.suggestionSpan.notifySelection( 3050 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 3051 3052 // Swap text content between actual text and Suggestion span 3053 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 3054 suggestions[suggestionInfo.suggestionIndex] = originalText; 3055 3056 // Restore previous SuggestionSpans 3057 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 3058 for (int i = 0; i < length; i++) { 3059 // Only spans that include the modified region make sense after replacement 3060 // Spans partially included in the replaced region are removed, there is no 3061 // way to assign them a valid range after replacement 3062 if (suggestionSpansStarts[i] <= spanStart && 3063 suggestionSpansEnds[i] >= spanEnd) { 3064 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 3065 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 3066 } 3067 } 3068 3069 // Move cursor at the end of the replaced word 3070 final int newCursorPosition = spanEnd + lengthDifference; 3071 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 3072 } 3073 3074 hide(); 3075 } 3076 } 3077 3078 /** 3079 * An ActionMode Callback class that is used to provide actions while in text selection mode. 3080 * 3081 * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending 3082 * on which of these this TextView supports. 3083 */ 3084 private class SelectionActionModeCallback extends ActionMode.Callback2 { 3085 private final Path mSelectionPath = new Path(); 3086 private final RectF mSelectionBounds = new RectF(); 3087 3088 private int mSelectionHandleHeight; 3089 private int mInsertionHandleHeight; 3090 3091 public SelectionActionModeCallback() { 3092 SelectionModifierCursorController selectionController = getSelectionController(); 3093 if (selectionController.mStartHandle == null) { 3094 // As these are for initializing selectionController, hide() must be called. 3095 selectionController.initDrawables(); 3096 selectionController.initHandles(); 3097 selectionController.hide(); 3098 } 3099 mSelectionHandleHeight = Math.max( 3100 mSelectHandleLeft.getMinimumHeight(), mSelectHandleRight.getMinimumHeight()); 3101 InsertionPointCursorController insertionController = getInsertionController(); 3102 if (insertionController != null) { 3103 insertionController.getHandle(); 3104 mInsertionHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3105 } 3106 } 3107 3108 @Override 3109 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3110 mode.setTitle(mTextView.getContext().getString( 3111 com.android.internal.R.string.textSelectionCABTitle)); 3112 mode.setSubtitle(null); 3113 mode.setTitleOptionalHint(true); 3114 populateMenuWithItems(menu); 3115 3116 if (mCustomSelectionActionModeCallback != null) { 3117 if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) { 3118 // The custom mode can choose to cancel the action mode 3119 return false; 3120 } 3121 } 3122 3123 addIntentMenuItemsForTextProcessing(menu); 3124 3125 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3126 mTextView.setHasTransientState(true); 3127 return true; 3128 } else { 3129 return false; 3130 } 3131 } 3132 3133 private void populateMenuWithItems(Menu menu) { 3134 if (mTextView.canCut()) { 3135 menu.add(0, TextView.ID_CUT, 0, com.android.internal.R.string.cut). 3136 setAlphabeticShortcut('x'). 3137 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3138 } 3139 3140 if (mTextView.canCopy()) { 3141 menu.add(0, TextView.ID_COPY, 0, com.android.internal.R.string.copy). 3142 setAlphabeticShortcut('c'). 3143 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3144 } 3145 3146 if (mTextView.canPaste()) { 3147 menu.add(0, TextView.ID_PASTE, 0, com.android.internal.R.string.paste). 3148 setAlphabeticShortcut('v'). 3149 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3150 } 3151 3152 if (mTextView.canShare()) { 3153 menu.add(0, TextView.ID_SHARE, 0, com.android.internal.R.string.share). 3154 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3155 } 3156 3157 if (mTextView.canSelectAllText()) { 3158 menu.add(0, TextView.ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll). 3159 setAlphabeticShortcut('a'). 3160 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3161 } 3162 3163 updateReplaceItem(menu); 3164 } 3165 3166 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3167 if (mTextView.canProcessText()) { 3168 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3169 List<ResolveInfo> supportedActivities = 3170 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3171 for (ResolveInfo info : supportedActivities) { 3172 menu.add(info.loadLabel(packageManager)) 3173 .setIntent(createProcessTextIntentForResolveInfo(info)) 3174 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3175 } 3176 } 3177 } 3178 3179 private Intent createProcessTextIntent() { 3180 return new Intent() 3181 .setAction(Intent.ACTION_PROCESS_TEXT) 3182 .setType("text/plain"); 3183 } 3184 3185 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3186 return createProcessTextIntent() 3187 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3188 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3189 } 3190 3191 @Override 3192 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3193 updateReplaceItem(menu); 3194 3195 if (mCustomSelectionActionModeCallback != null) { 3196 return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu); 3197 } 3198 return true; 3199 } 3200 3201 private void updateReplaceItem(Menu menu) { 3202 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3203 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3204 if (canReplace && !replaceItemExists) { 3205 menu.add(0, TextView.ID_REPLACE, 0, com.android.internal.R.string.replace). 3206 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3207 } else if (!canReplace && replaceItemExists) { 3208 menu.removeItem(TextView.ID_REPLACE); 3209 } 3210 } 3211 3212 @Override 3213 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3214 if (item.getIntent() != null 3215 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3216 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3217 mPreserveDetachedSelection = true; 3218 mTextView.startActivityForResult( 3219 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3220 return true; 3221 } 3222 if (mCustomSelectionActionModeCallback != null && 3223 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) { 3224 return true; 3225 } 3226 return mTextView.onTextContextMenuItem(item.getItemId()); 3227 } 3228 3229 @Override 3230 public void onDestroyActionMode(ActionMode mode) { 3231 if (mCustomSelectionActionModeCallback != null) { 3232 mCustomSelectionActionModeCallback.onDestroyActionMode(mode); 3233 } 3234 3235 /* 3236 * If we're ending this mode because we're detaching from a window, 3237 * we still have selection state to preserve. Don't clear it, we'll 3238 * bring back the selection mode when (if) we get reattached. 3239 */ 3240 if (!mPreserveDetachedSelection) { 3241 Selection.setSelection((Spannable) mTextView.getText(), 3242 mTextView.getSelectionEnd()); 3243 mTextView.setHasTransientState(false); 3244 } 3245 3246 if (mSelectionModifierCursorController != null) { 3247 mSelectionModifierCursorController.hide(); 3248 mSelectionModifierCursorController.resetTouchOffsets(); 3249 } 3250 3251 mSelectionActionMode = null; 3252 } 3253 3254 @Override 3255 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3256 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3257 super.onGetContentRect(mode, view, outRect); 3258 return; 3259 } 3260 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3261 // We have a selection. 3262 mSelectionPath.reset(); 3263 mTextView.getLayout().getSelectionPath( 3264 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3265 mSelectionPath.computeBounds(mSelectionBounds, true); 3266 mSelectionBounds.bottom += mSelectionHandleHeight; 3267 } else if (mCursorCount == 2) { 3268 // We have a split cursor. In this case, we take the rectangle that includes both 3269 // parts of the cursor to ensure we don't obscure either of them. 3270 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3271 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3272 mSelectionBounds.set( 3273 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3274 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3275 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3276 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3277 + mInsertionHandleHeight); 3278 } else { 3279 // We have a single cursor. 3280 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3281 float primaryHorizontal = 3282 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3283 mSelectionBounds.set( 3284 primaryHorizontal, 3285 mTextView.getLayout().getLineTop(line), 3286 primaryHorizontal + 1, 3287 mTextView.getLayout().getLineTop(line + 1) + mInsertionHandleHeight); 3288 } 3289 // Take TextView's padding and scroll into account. 3290 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3291 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3292 outRect.set( 3293 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3294 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3295 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3296 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3297 } 3298 } 3299 3300 /** 3301 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3302 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3303 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3304 */ 3305 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3306 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3307 final int[] mTmpIntOffset = new int[2]; 3308 final Matrix mViewToScreenMatrix = new Matrix(); 3309 3310 @Override 3311 public void updatePosition(int parentPositionX, int parentPositionY, 3312 boolean parentPositionChanged, boolean parentScrolled) { 3313 final InputMethodState ims = mInputMethodState; 3314 if (ims == null || ims.mBatchEditNesting > 0) { 3315 return; 3316 } 3317 final InputMethodManager imm = InputMethodManager.peekInstance(); 3318 if (null == imm) { 3319 return; 3320 } 3321 if (!imm.isActive(mTextView)) { 3322 return; 3323 } 3324 // Skip if the IME has not requested the cursor/anchor position. 3325 if (!imm.isCursorAnchorInfoEnabled()) { 3326 return; 3327 } 3328 Layout layout = mTextView.getLayout(); 3329 if (layout == null) { 3330 return; 3331 } 3332 3333 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3334 builder.reset(); 3335 3336 final int selectionStart = mTextView.getSelectionStart(); 3337 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3338 3339 // Construct transformation matrix from view local coordinates to screen coordinates. 3340 mViewToScreenMatrix.set(mTextView.getMatrix()); 3341 mTextView.getLocationOnScreen(mTmpIntOffset); 3342 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3343 builder.setMatrix(mViewToScreenMatrix); 3344 3345 final float viewportToContentHorizontalOffset = 3346 mTextView.viewportToContentHorizontalOffset(); 3347 final float viewportToContentVerticalOffset = 3348 mTextView.viewportToContentVerticalOffset(); 3349 3350 final CharSequence text = mTextView.getText(); 3351 if (text instanceof Spannable) { 3352 final Spannable sp = (Spannable) text; 3353 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3354 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3355 if (composingTextEnd < composingTextStart) { 3356 final int temp = composingTextEnd; 3357 composingTextEnd = composingTextStart; 3358 composingTextStart = temp; 3359 } 3360 final boolean hasComposingText = 3361 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3362 if (hasComposingText) { 3363 final CharSequence composingText = text.subSequence(composingTextStart, 3364 composingTextEnd); 3365 builder.setComposingText(composingTextStart, composingText); 3366 3367 final int minLine = layout.getLineForOffset(composingTextStart); 3368 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3369 for (int line = minLine; line <= maxLine; ++line) { 3370 final int lineStart = layout.getLineStart(line); 3371 final int lineEnd = layout.getLineEnd(line); 3372 final int offsetStart = Math.max(lineStart, composingTextStart); 3373 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3374 final boolean ltrLine = 3375 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3376 final float[] widths = new float[offsetEnd - offsetStart]; 3377 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3378 final float top = layout.getLineTop(line); 3379 final float bottom = layout.getLineBottom(line); 3380 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3381 final float charWidth = widths[offset - offsetStart]; 3382 final boolean isRtl = layout.isRtlCharAt(offset); 3383 final float primary = layout.getPrimaryHorizontal(offset); 3384 final float secondary = layout.getSecondaryHorizontal(offset); 3385 // TODO: This doesn't work perfectly for text with custom styles and 3386 // TAB chars. 3387 final float left; 3388 final float right; 3389 if (ltrLine) { 3390 if (isRtl) { 3391 left = secondary - charWidth; 3392 right = secondary; 3393 } else { 3394 left = primary; 3395 right = primary + charWidth; 3396 } 3397 } else { 3398 if (!isRtl) { 3399 left = secondary; 3400 right = secondary + charWidth; 3401 } else { 3402 left = primary - charWidth; 3403 right = primary; 3404 } 3405 } 3406 // TODO: Check top-right and bottom-left as well. 3407 final float localLeft = left + viewportToContentHorizontalOffset; 3408 final float localRight = right + viewportToContentHorizontalOffset; 3409 final float localTop = top + viewportToContentVerticalOffset; 3410 final float localBottom = bottom + viewportToContentVerticalOffset; 3411 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3412 final boolean isBottomRightVisible = 3413 isPositionVisible(localRight, localBottom); 3414 int characterBoundsFlags = 0; 3415 if (isTopLeftVisible || isBottomRightVisible) { 3416 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3417 } 3418 if (!isTopLeftVisible || !isBottomRightVisible) { 3419 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3420 } 3421 if (isRtl) { 3422 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3423 } 3424 // Here offset is the index in Java chars. 3425 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3426 localBottom, characterBoundsFlags); 3427 } 3428 } 3429 } 3430 } 3431 3432 // Treat selectionStart as the insertion point. 3433 if (0 <= selectionStart) { 3434 final int offset = selectionStart; 3435 final int line = layout.getLineForOffset(offset); 3436 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3437 + viewportToContentHorizontalOffset; 3438 final float insertionMarkerTop = layout.getLineTop(line) 3439 + viewportToContentVerticalOffset; 3440 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3441 + viewportToContentVerticalOffset; 3442 final float insertionMarkerBottom = layout.getLineBottom(line) 3443 + viewportToContentVerticalOffset; 3444 final boolean isTopVisible = 3445 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3446 final boolean isBottomVisible = 3447 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3448 int insertionMarkerFlags = 0; 3449 if (isTopVisible || isBottomVisible) { 3450 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3451 } 3452 if (!isTopVisible || !isBottomVisible) { 3453 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3454 } 3455 if (layout.isRtlCharAt(offset)) { 3456 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3457 } 3458 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3459 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3460 } 3461 3462 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3463 } 3464 } 3465 3466 private abstract class HandleView extends View implements TextViewPositionListener { 3467 protected Drawable mDrawable; 3468 protected Drawable mDrawableLtr; 3469 protected Drawable mDrawableRtl; 3470 private final PopupWindow mContainer; 3471 // Position with respect to the parent TextView 3472 private int mPositionX, mPositionY; 3473 private boolean mIsDragging; 3474 // Offset from touch position to mPosition 3475 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3476 protected int mHotspotX; 3477 protected int mHorizontalGravity; 3478 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3479 private float mTouchOffsetY; 3480 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3481 private float mIdealVerticalOffset; 3482 // Parent's (TextView) previous position in window 3483 private int mLastParentX, mLastParentY; 3484 // Previous text character offset 3485 protected int mPreviousOffset = -1; 3486 // Previous text character offset 3487 private boolean mPositionHasChanged = true; 3488 // Minimum touch target size for handles 3489 private int mMinSize; 3490 // Indicates the line of text that the handle is on. 3491 protected int mPrevLine = -1; 3492 3493 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3494 super(mTextView.getContext()); 3495 mContainer = new PopupWindow(mTextView.getContext(), null, 3496 com.android.internal.R.attr.textSelectHandleWindowStyle); 3497 mContainer.setSplitTouchEnabled(true); 3498 mContainer.setClippingEnabled(false); 3499 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3500 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3501 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3502 mContainer.setContentView(this); 3503 3504 mDrawableLtr = drawableLtr; 3505 mDrawableRtl = drawableRtl; 3506 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3507 com.android.internal.R.dimen.text_handle_min_size); 3508 3509 updateDrawable(); 3510 3511 final int handleHeight = getPreferredHeight(); 3512 mTouchOffsetY = -0.3f * handleHeight; 3513 mIdealVerticalOffset = 0.7f * handleHeight; 3514 } 3515 3516 public float getIdealVerticalOffset() { 3517 return mIdealVerticalOffset; 3518 } 3519 3520 protected void updateDrawable() { 3521 final int offset = getCurrentCursorOffset(); 3522 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3523 final Drawable oldDrawable = mDrawable; 3524 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3525 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3526 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3527 if (oldDrawable != mDrawable) { 3528 postInvalidate(); 3529 } 3530 } 3531 3532 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3533 protected abstract int getHorizontalGravity(boolean isRtlRun); 3534 3535 // Touch-up filter: number of previous positions remembered 3536 private static final int HISTORY_SIZE = 5; 3537 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3538 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3539 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3540 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3541 private int mPreviousOffsetIndex = 0; 3542 private int mNumberPreviousOffsets = 0; 3543 3544 private void startTouchUpFilter(int offset) { 3545 mNumberPreviousOffsets = 0; 3546 addPositionToTouchUpFilter(offset); 3547 } 3548 3549 private void addPositionToTouchUpFilter(int offset) { 3550 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3551 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3552 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3553 mNumberPreviousOffsets++; 3554 } 3555 3556 private void filterOnTouchUp() { 3557 final long now = SystemClock.uptimeMillis(); 3558 int i = 0; 3559 int index = mPreviousOffsetIndex; 3560 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3561 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3562 i++; 3563 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3564 } 3565 3566 if (i > 0 && i < iMax && 3567 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3568 positionAtCursorOffset(mPreviousOffsets[index], false); 3569 } 3570 } 3571 3572 public boolean offsetHasBeenChanged() { 3573 return mNumberPreviousOffsets > 1; 3574 } 3575 3576 @Override 3577 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3578 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3579 } 3580 3581 private int getPreferredWidth() { 3582 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3583 } 3584 3585 private int getPreferredHeight() { 3586 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3587 } 3588 3589 public void show() { 3590 if (isShowing()) return; 3591 3592 getPositionListener().addSubscriber(this, true /* local position may change */); 3593 3594 // Make sure the offset is always considered new, even when focusing at same position 3595 mPreviousOffset = -1; 3596 positionAtCursorOffset(getCurrentCursorOffset(), false); 3597 } 3598 3599 protected void dismiss() { 3600 mIsDragging = false; 3601 mContainer.dismiss(); 3602 onDetached(); 3603 } 3604 3605 public void hide() { 3606 dismiss(); 3607 3608 getPositionListener().removeSubscriber(this); 3609 } 3610 3611 public boolean isShowing() { 3612 return mContainer.isShowing(); 3613 } 3614 3615 private boolean isVisible() { 3616 // Always show a dragging handle. 3617 if (mIsDragging) { 3618 return true; 3619 } 3620 3621 if (mTextView.isInBatchEditMode()) { 3622 return false; 3623 } 3624 3625 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3626 } 3627 3628 public abstract int getCurrentCursorOffset(); 3629 3630 protected abstract void updateSelection(int offset); 3631 3632 public abstract void updatePosition(float x, float y); 3633 3634 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3635 // A HandleView relies on the layout, which may be nulled by external methods 3636 Layout layout = mTextView.getLayout(); 3637 if (layout == null) { 3638 // Will update controllers' state, hiding them and stopping selection mode if needed 3639 prepareCursorControllers(); 3640 return; 3641 } 3642 3643 boolean offsetChanged = offset != mPreviousOffset; 3644 if (offsetChanged || parentScrolled) { 3645 if (offsetChanged) { 3646 updateSelection(offset); 3647 addPositionToTouchUpFilter(offset); 3648 } 3649 final int line = layout.getLineForOffset(offset); 3650 mPrevLine = line; 3651 3652 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3653 getHorizontalOffset() + getCursorOffset()); 3654 mPositionY = layout.getLineBottom(line); 3655 3656 // Take TextView's padding and scroll into account. 3657 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3658 mPositionY += mTextView.viewportToContentVerticalOffset(); 3659 3660 mPreviousOffset = offset; 3661 mPositionHasChanged = true; 3662 } 3663 } 3664 3665 public void updatePosition(int parentPositionX, int parentPositionY, 3666 boolean parentPositionChanged, boolean parentScrolled) { 3667 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3668 if (parentPositionChanged || mPositionHasChanged) { 3669 if (mIsDragging) { 3670 // Update touchToWindow offset in case of parent scrolling while dragging 3671 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3672 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3673 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3674 mLastParentX = parentPositionX; 3675 mLastParentY = parentPositionY; 3676 } 3677 3678 onHandleMoved(); 3679 } 3680 3681 if (isVisible()) { 3682 final int positionX = parentPositionX + mPositionX; 3683 final int positionY = parentPositionY + mPositionY; 3684 if (isShowing()) { 3685 mContainer.update(positionX, positionY, -1, -1); 3686 } else { 3687 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3688 positionX, positionY); 3689 } 3690 } else { 3691 if (isShowing()) { 3692 dismiss(); 3693 } 3694 } 3695 3696 mPositionHasChanged = false; 3697 } 3698 } 3699 3700 public void showAtLocation(int offset) { 3701 // TODO - investigate if there's a better way to show the handles 3702 // after the drag accelerator has occured. 3703 int[] tmpCords = new int[2]; 3704 mTextView.getLocationInWindow(tmpCords); 3705 3706 Layout layout = mTextView.getLayout(); 3707 int posX = tmpCords[0]; 3708 int posY = tmpCords[1]; 3709 3710 final int line = layout.getLineForOffset(offset); 3711 3712 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3713 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3714 int startY = layout.getLineBottom(line); 3715 3716 // Take TextView's padding and scroll into account. 3717 startX += mTextView.viewportToContentHorizontalOffset(); 3718 startY += mTextView.viewportToContentVerticalOffset(); 3719 3720 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3721 startX + posX, startY + posY); 3722 } 3723 3724 @Override 3725 protected void onDraw(Canvas c) { 3726 final int drawWidth = mDrawable.getIntrinsicWidth(); 3727 final int left = getHorizontalOffset(); 3728 3729 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3730 mDrawable.draw(c); 3731 } 3732 3733 private int getHorizontalOffset() { 3734 final int width = getPreferredWidth(); 3735 final int drawWidth = mDrawable.getIntrinsicWidth(); 3736 final int left; 3737 switch (mHorizontalGravity) { 3738 case Gravity.LEFT: 3739 left = 0; 3740 break; 3741 default: 3742 case Gravity.CENTER: 3743 left = (width - drawWidth) / 2; 3744 break; 3745 case Gravity.RIGHT: 3746 left = width - drawWidth; 3747 break; 3748 } 3749 return left; 3750 } 3751 3752 protected int getCursorOffset() { 3753 return 0; 3754 } 3755 3756 @Override 3757 public boolean onTouchEvent(MotionEvent ev) { 3758 updateFloatingToolbarVisibility(ev); 3759 3760 switch (ev.getActionMasked()) { 3761 case MotionEvent.ACTION_DOWN: { 3762 startTouchUpFilter(getCurrentCursorOffset()); 3763 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3764 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3765 3766 final PositionListener positionListener = getPositionListener(); 3767 mLastParentX = positionListener.getPositionX(); 3768 mLastParentY = positionListener.getPositionY(); 3769 mIsDragging = true; 3770 break; 3771 } 3772 3773 case MotionEvent.ACTION_MOVE: { 3774 final float rawX = ev.getRawX(); 3775 final float rawY = ev.getRawY(); 3776 3777 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3778 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3779 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3780 float newVerticalOffset; 3781 if (previousVerticalOffset < mIdealVerticalOffset) { 3782 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3783 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3784 } else { 3785 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3786 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3787 } 3788 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3789 3790 final float newPosX = 3791 rawX - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 3792 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3793 3794 updatePosition(newPosX, newPosY); 3795 break; 3796 } 3797 3798 case MotionEvent.ACTION_UP: 3799 filterOnTouchUp(); 3800 mIsDragging = false; 3801 break; 3802 3803 case MotionEvent.ACTION_CANCEL: 3804 mIsDragging = false; 3805 break; 3806 } 3807 return true; 3808 } 3809 3810 public boolean isDragging() { 3811 return mIsDragging; 3812 } 3813 3814 void onHandleMoved() {} 3815 3816 public void onDetached() {} 3817 } 3818 3819 private class InsertionHandleView extends HandleView { 3820 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3821 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3822 3823 // Used to detect taps on the insertion handle, which will affect the selection action mode 3824 private float mDownPositionX, mDownPositionY; 3825 private Runnable mHider; 3826 3827 public InsertionHandleView(Drawable drawable) { 3828 super(drawable, drawable); 3829 } 3830 3831 @Override 3832 public void show() { 3833 super.show(); 3834 3835 final long durationSinceCutOrCopy = 3836 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 3837 3838 // Cancel the single tap delayed runnable. 3839 if (mSelectionModeWithoutSelectionRunnable != null 3840 && (mDoubleTap || isCursorInsideEasyCorrectionSpan())) { 3841 mTextView.removeCallbacks(mSelectionModeWithoutSelectionRunnable); 3842 } 3843 3844 // Prepare and schedule the single tap runnable to run exactly after the double tap 3845 // timeout has passed. 3846 if (!mDoubleTap && !isCursorInsideEasyCorrectionSpan() 3847 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 3848 if (mSelectionModeWithoutSelectionRunnable == null) { 3849 mSelectionModeWithoutSelectionRunnable = new Runnable() { 3850 public void run() { 3851 startSelectionActionModeWithoutSelection(); 3852 } 3853 }; 3854 } 3855 3856 mTextView.postDelayed( 3857 mSelectionModeWithoutSelectionRunnable, 3858 ViewConfiguration.getDoubleTapTimeout() + 1); 3859 } 3860 3861 hideAfterDelay(); 3862 } 3863 3864 private void hideAfterDelay() { 3865 if (mHider == null) { 3866 mHider = new Runnable() { 3867 public void run() { 3868 hide(); 3869 } 3870 }; 3871 } else { 3872 removeHiderCallback(); 3873 } 3874 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3875 } 3876 3877 private void removeHiderCallback() { 3878 if (mHider != null) { 3879 mTextView.removeCallbacks(mHider); 3880 } 3881 } 3882 3883 @Override 3884 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3885 return drawable.getIntrinsicWidth() / 2; 3886 } 3887 3888 @Override 3889 protected int getHorizontalGravity(boolean isRtlRun) { 3890 return Gravity.CENTER_HORIZONTAL; 3891 } 3892 3893 @Override 3894 protected int getCursorOffset() { 3895 int offset = super.getCursorOffset(); 3896 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3897 if (cursor != null) { 3898 cursor.getPadding(mTempRect); 3899 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3900 } 3901 return offset; 3902 } 3903 3904 @Override 3905 public boolean onTouchEvent(MotionEvent ev) { 3906 final boolean result = super.onTouchEvent(ev); 3907 3908 switch (ev.getActionMasked()) { 3909 case MotionEvent.ACTION_DOWN: 3910 mDownPositionX = ev.getRawX(); 3911 mDownPositionY = ev.getRawY(); 3912 break; 3913 3914 case MotionEvent.ACTION_UP: 3915 if (!offsetHasBeenChanged()) { 3916 final float deltaX = mDownPositionX - ev.getRawX(); 3917 final float deltaY = mDownPositionY - ev.getRawY(); 3918 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3919 3920 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3921 mTextView.getContext()); 3922 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3923 3924 if (distanceSquared < touchSlop * touchSlop) { 3925 // Tapping on the handle toggles the selection action mode. 3926 if (mSelectionActionMode != null) { 3927 mSelectionActionMode.finish(); 3928 } else { 3929 startSelectionActionModeWithoutSelection(); 3930 } 3931 } 3932 } else { 3933 if (mSelectionActionMode != null) { 3934 mSelectionActionMode.invalidateContentRect(); 3935 } 3936 } 3937 hideAfterDelay(); 3938 break; 3939 3940 case MotionEvent.ACTION_CANCEL: 3941 hideAfterDelay(); 3942 break; 3943 3944 default: 3945 break; 3946 } 3947 3948 return result; 3949 } 3950 3951 @Override 3952 public int getCurrentCursorOffset() { 3953 return mTextView.getSelectionStart(); 3954 } 3955 3956 @Override 3957 public void updateSelection(int offset) { 3958 Selection.setSelection((Spannable) mTextView.getText(), offset); 3959 } 3960 3961 @Override 3962 public void updatePosition(float x, float y) { 3963 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 3964 if (mSelectionActionMode != null) { 3965 mSelectionActionMode.invalidate(); 3966 } 3967 } 3968 3969 @Override 3970 void onHandleMoved() { 3971 super.onHandleMoved(); 3972 removeHiderCallback(); 3973 } 3974 3975 @Override 3976 public void onDetached() { 3977 super.onDetached(); 3978 removeHiderCallback(); 3979 } 3980 } 3981 3982 private class SelectionStartHandleView extends HandleView { 3983 // Indicates whether the cursor is making adjustments within a word. 3984 private boolean mInWord = false; 3985 // Difference between touch position and word boundary position. 3986 private float mTouchWordDelta; 3987 3988 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 3989 super(drawableLtr, drawableRtl); 3990 } 3991 3992 @Override 3993 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3994 if (isRtlRun) { 3995 return drawable.getIntrinsicWidth() / 4; 3996 } else { 3997 return (drawable.getIntrinsicWidth() * 3) / 4; 3998 } 3999 } 4000 4001 @Override 4002 protected int getHorizontalGravity(boolean isRtlRun) { 4003 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 4004 } 4005 4006 @Override 4007 public int getCurrentCursorOffset() { 4008 return mTextView.getSelectionStart(); 4009 } 4010 4011 @Override 4012 public void updateSelection(int offset) { 4013 Selection.setSelection((Spannable) mTextView.getText(), offset, 4014 mTextView.getSelectionEnd()); 4015 updateDrawable(); 4016 if (mSelectionActionMode != null) { 4017 mSelectionActionMode.invalidate(); 4018 } 4019 } 4020 4021 @Override 4022 public void updatePosition(float x, float y) { 4023 final int selectionEnd = mTextView.getSelectionEnd(); 4024 final Layout layout = mTextView.getLayout(); 4025 int initialOffset = mTextView.getOffsetForPosition(x, y); 4026 int currLine = mTextView.getLineAtCoordinate(y); 4027 boolean positionCursor = false; 4028 4029 if (initialOffset >= selectionEnd) { 4030 // Handles have crossed, bound it to the last selected line and 4031 // adjust by word / char as normal. 4032 currLine = layout != null ? layout.getLineForOffset(selectionEnd) : mPrevLine; 4033 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4034 } 4035 4036 int offset = initialOffset; 4037 int end = getWordEnd(offset); 4038 int start = getWordStart(offset); 4039 4040 if (offset < mPreviousOffset) { 4041 // User is increasing the selection. 4042 if (!mInWord || currLine < mPrevLine) { 4043 // We're not in a word, or we're on a different line so we'll expand by 4044 // word. First ensure the user has at least entered the next word. 4045 int offsetToWord = Math.min((end - start) / 2, 2); 4046 if (offset <= end - offsetToWord || currLine < mPrevLine) { 4047 offset = start; 4048 } else { 4049 offset = mPreviousOffset; 4050 } 4051 } 4052 if (layout != null && offset < initialOffset) { 4053 final float adjustedX = layout.getPrimaryHorizontal(offset); 4054 mTouchWordDelta = 4055 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4056 } else { 4057 mTouchWordDelta = 0.0f; 4058 } 4059 positionCursor = true; 4060 } else { 4061 final int adjustedOffset = 4062 mTextView.getOffsetAtCoordinate(currLine, x - mTouchWordDelta); 4063 if (adjustedOffset > mPreviousOffset || currLine > mPrevLine) { 4064 // User is shrinking the selection. 4065 if (currLine > mPrevLine) { 4066 // We're on a different line, so we'll snap to word boundaries. 4067 offset = start; 4068 if (layout != null && offset < initialOffset) { 4069 final float adjustedX = layout.getPrimaryHorizontal(offset); 4070 mTouchWordDelta = 4071 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4072 } else { 4073 mTouchWordDelta = 0.0f; 4074 } 4075 } else { 4076 offset = adjustedOffset; 4077 } 4078 positionCursor = true; 4079 } 4080 } 4081 4082 if (positionCursor) { 4083 // Handles can not cross and selection is at least one character. 4084 if (offset >= selectionEnd) { 4085 offset = getNextCursorOffset(selectionEnd, false); 4086 mTouchWordDelta = 0.0f; 4087 } 4088 positionAtCursorOffset(offset, false); 4089 } 4090 } 4091 4092 @Override 4093 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4094 super.positionAtCursorOffset(offset, parentScrolled); 4095 mInWord = !getWordIteratorWithText().isBoundary(offset); 4096 } 4097 4098 @Override 4099 public boolean onTouchEvent(MotionEvent event) { 4100 boolean superResult = super.onTouchEvent(event); 4101 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4102 // Reset the touch word offset when the user has lifted their finger. 4103 mTouchWordDelta = 0.0f; 4104 } 4105 return superResult; 4106 } 4107 } 4108 4109 private class SelectionEndHandleView extends HandleView { 4110 // Indicates whether the cursor is making adjustments within a word. 4111 private boolean mInWord = false; 4112 // Difference between touch position and word boundary position. 4113 private float mTouchWordDelta; 4114 4115 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4116 super(drawableLtr, drawableRtl); 4117 } 4118 4119 @Override 4120 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4121 if (isRtlRun) { 4122 return (drawable.getIntrinsicWidth() * 3) / 4; 4123 } else { 4124 return drawable.getIntrinsicWidth() / 4; 4125 } 4126 } 4127 4128 @Override 4129 protected int getHorizontalGravity(boolean isRtlRun) { 4130 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 4131 } 4132 4133 @Override 4134 public int getCurrentCursorOffset() { 4135 return mTextView.getSelectionEnd(); 4136 } 4137 4138 @Override 4139 public void updateSelection(int offset) { 4140 Selection.setSelection((Spannable) mTextView.getText(), 4141 mTextView.getSelectionStart(), offset); 4142 if (mSelectionActionMode != null) { 4143 mSelectionActionMode.invalidate(); 4144 } 4145 updateDrawable(); 4146 } 4147 4148 @Override 4149 public void updatePosition(float x, float y) { 4150 final int selectionStart = mTextView.getSelectionStart(); 4151 final Layout layout = mTextView.getLayout(); 4152 int initialOffset = mTextView.getOffsetForPosition(x, y); 4153 int currLine = mTextView.getLineAtCoordinate(y); 4154 boolean positionCursor = false; 4155 4156 if (initialOffset <= selectionStart) { 4157 // Handles have crossed, bound it to the first selected line and 4158 // adjust by word / char as normal. 4159 currLine = layout != null ? layout.getLineForOffset(selectionStart) : mPrevLine; 4160 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4161 } 4162 4163 int offset = initialOffset; 4164 int end = getWordEnd(offset); 4165 int start = getWordStart(offset); 4166 4167 if (offset > mPreviousOffset) { 4168 // User is increasing the selection. 4169 if (!mInWord || currLine > mPrevLine) { 4170 // We're not in a word, or we're on a different line so we'll expand by 4171 // word. First ensure the user has at least entered the next word. 4172 int midPoint = Math.min((end - start) / 2, 2); 4173 if (offset >= start + midPoint || currLine > mPrevLine) { 4174 offset = end; 4175 } else { 4176 offset = mPreviousOffset; 4177 } 4178 } 4179 if (layout != null && offset > initialOffset) { 4180 final float adjustedX = layout.getPrimaryHorizontal(offset); 4181 mTouchWordDelta = 4182 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4183 } else { 4184 mTouchWordDelta = 0.0f; 4185 } 4186 positionCursor = true; 4187 } else { 4188 final int adjustedOffset = 4189 mTextView.getOffsetAtCoordinate(currLine, x + mTouchWordDelta); 4190 if (adjustedOffset < mPreviousOffset || currLine < mPrevLine) { 4191 // User is shrinking the selection. 4192 if (currLine < mPrevLine) { 4193 // We're on a different line, so we'll snap to word boundaries. 4194 offset = end; 4195 if (layout != null && offset > initialOffset) { 4196 final float adjustedX = layout.getPrimaryHorizontal(offset); 4197 mTouchWordDelta = 4198 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4199 } else { 4200 mTouchWordDelta = 0.0f; 4201 } 4202 } else { 4203 offset = adjustedOffset; 4204 } 4205 positionCursor = true; 4206 } 4207 } 4208 4209 if (positionCursor) { 4210 // Handles can not cross and selection is at least one character. 4211 if (offset <= selectionStart) { 4212 offset = getNextCursorOffset(selectionStart, true); 4213 mTouchWordDelta = 0.0f; 4214 } 4215 positionAtCursorOffset(offset, false); 4216 } 4217 } 4218 4219 @Override 4220 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4221 super.positionAtCursorOffset(offset, parentScrolled); 4222 mInWord = !getWordIteratorWithText().isBoundary(offset); 4223 } 4224 4225 @Override 4226 public boolean onTouchEvent(MotionEvent event) { 4227 boolean superResult = super.onTouchEvent(event); 4228 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4229 // Reset the touch word offset when the user has lifted their finger. 4230 mTouchWordDelta = 0.0f; 4231 } 4232 return superResult; 4233 } 4234 } 4235 4236 /** 4237 * A CursorController instance can be used to control a cursor in the text. 4238 */ 4239 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4240 /** 4241 * Makes the cursor controller visible on screen. 4242 * See also {@link #hide()}. 4243 */ 4244 public void show(); 4245 4246 /** 4247 * Hide the cursor controller from screen. 4248 * See also {@link #show()}. 4249 */ 4250 public void hide(); 4251 4252 /** 4253 * Called when the view is detached from window. Perform house keeping task, such as 4254 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4255 * preventing the activity from being recycled. 4256 */ 4257 public void onDetached(); 4258 } 4259 4260 private class InsertionPointCursorController implements CursorController { 4261 private InsertionHandleView mHandle; 4262 4263 public void show() { 4264 getHandle().show(); 4265 4266 if (mSelectionModifierCursorController != null) { 4267 mSelectionModifierCursorController.hide(); 4268 } 4269 } 4270 4271 public void hide() { 4272 if (mHandle != null) { 4273 mHandle.hide(); 4274 } 4275 } 4276 4277 public void onTouchModeChanged(boolean isInTouchMode) { 4278 if (!isInTouchMode) { 4279 hide(); 4280 } 4281 } 4282 4283 private InsertionHandleView getHandle() { 4284 if (mSelectHandleCenter == null) { 4285 mSelectHandleCenter = mTextView.getContext().getDrawable( 4286 mTextView.mTextSelectHandleRes); 4287 } 4288 if (mHandle == null) { 4289 mHandle = new InsertionHandleView(mSelectHandleCenter); 4290 } 4291 return mHandle; 4292 } 4293 4294 @Override 4295 public void onDetached() { 4296 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4297 observer.removeOnTouchModeChangeListener(this); 4298 4299 if (mHandle != null) mHandle.onDetached(); 4300 } 4301 } 4302 4303 class SelectionModifierCursorController implements CursorController { 4304 // The cursor controller handles, lazily created when shown. 4305 private SelectionStartHandleView mStartHandle; 4306 private SelectionEndHandleView mEndHandle; 4307 // The offsets of that last touch down event. Remembered to start selection there. 4308 private int mMinTouchOffset, mMaxTouchOffset; 4309 4310 private float mDownPositionX, mDownPositionY; 4311 private boolean mGestureStayedInTapRegion; 4312 4313 // Where the user first starts the drag motion. 4314 private int mStartOffset = -1; 4315 // Indicates whether the user is selecting text and using the drag accelerator. 4316 private boolean mDragAcceleratorActive; 4317 private boolean mHaventMovedEnoughToStartDrag; 4318 4319 SelectionModifierCursorController() { 4320 resetTouchOffsets(); 4321 } 4322 4323 public void show() { 4324 if (mTextView.isInBatchEditMode()) { 4325 return; 4326 } 4327 initDrawables(); 4328 initHandles(); 4329 hideInsertionPointCursorController(); 4330 } 4331 4332 private void initDrawables() { 4333 if (mSelectHandleLeft == null) { 4334 mSelectHandleLeft = mTextView.getContext().getDrawable( 4335 mTextView.mTextSelectHandleLeftRes); 4336 } 4337 if (mSelectHandleRight == null) { 4338 mSelectHandleRight = mTextView.getContext().getDrawable( 4339 mTextView.mTextSelectHandleRightRes); 4340 } 4341 } 4342 4343 private void initHandles() { 4344 // Lazy object creation has to be done before updatePosition() is called. 4345 if (mStartHandle == null) { 4346 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4347 } 4348 if (mEndHandle == null) { 4349 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4350 } 4351 4352 mStartHandle.show(); 4353 mEndHandle.show(); 4354 4355 hideInsertionPointCursorController(); 4356 } 4357 4358 public void hide() { 4359 if (mStartHandle != null) mStartHandle.hide(); 4360 if (mEndHandle != null) mEndHandle.hide(); 4361 } 4362 4363 public void enterDrag() { 4364 // Just need to init the handles / hide insertion cursor. 4365 show(); 4366 mDragAcceleratorActive = true; 4367 // Start location of selection. 4368 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4369 mLastDownPositionY); 4370 // Don't show the handles until user has lifted finger. 4371 hide(); 4372 4373 // This stops scrolling parents from intercepting the touch event, allowing 4374 // the user to continue dragging across the screen to select text; TextView will 4375 // scroll as necessary. 4376 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4377 } 4378 4379 public void onTouchEvent(MotionEvent event) { 4380 // This is done even when the View does not have focus, so that long presses can start 4381 // selection and tap can move cursor from this tap position. 4382 final float eventX = event.getX(); 4383 final float eventY = event.getY(); 4384 switch (event.getActionMasked()) { 4385 case MotionEvent.ACTION_DOWN: 4386 4387 // Remember finger down position, to be able to start selection from there. 4388 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 4389 eventX, eventY); 4390 4391 // Double tap detection 4392 if (mGestureStayedInTapRegion) { 4393 if (mDoubleTap) { 4394 final float deltaX = eventX - mDownPositionX; 4395 final float deltaY = eventY - mDownPositionY; 4396 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4397 4398 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4399 mTextView.getContext()); 4400 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4401 boolean stayedInArea = distanceSquared < doubleTapSlop * doubleTapSlop; 4402 4403 if (stayedInArea && isPositionOnText(eventX, eventY)) { 4404 selectCurrentWordAndStartDrag(); 4405 mDiscardNextActionUp = true; 4406 } 4407 } 4408 } 4409 4410 mDownPositionX = eventX; 4411 mDownPositionY = eventY; 4412 mGestureStayedInTapRegion = true; 4413 mHaventMovedEnoughToStartDrag = true; 4414 break; 4415 4416 case MotionEvent.ACTION_POINTER_DOWN: 4417 case MotionEvent.ACTION_POINTER_UP: 4418 // Handle multi-point gestures. Keep min and max offset positions. 4419 // Only activated for devices that correctly handle multi-touch. 4420 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4421 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4422 updateMinAndMaxOffsets(event); 4423 } 4424 break; 4425 4426 case MotionEvent.ACTION_MOVE: 4427 final ViewConfiguration viewConfig = ViewConfiguration.get( 4428 mTextView.getContext()); 4429 final int touchSlop = viewConfig.getScaledTouchSlop(); 4430 4431 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 4432 final float deltaX = eventX - mDownPositionX; 4433 final float deltaY = eventY - mDownPositionY; 4434 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4435 4436 if (mGestureStayedInTapRegion) { 4437 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 4438 mGestureStayedInTapRegion = 4439 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 4440 } 4441 if (mHaventMovedEnoughToStartDrag) { 4442 // We don't start dragging until the user has moved enough. 4443 mHaventMovedEnoughToStartDrag = 4444 distanceSquared <= touchSlop * touchSlop; 4445 } 4446 } 4447 4448 if (mStartHandle != null && mStartHandle.isShowing()) { 4449 // Don't do the drag if the handles are showing already. 4450 break; 4451 } 4452 4453 if (mStartOffset != -1) { 4454 if (!mHaventMovedEnoughToStartDrag) { 4455 // Offset the finger by the same vertical offset as the handles. This 4456 // improves visibility of the content being selected by shifting 4457 // the finger below the content. 4458 final float fingerOffset = (mStartHandle != null) 4459 ? mStartHandle.getIdealVerticalOffset() 4460 : touchSlop; 4461 int offset = 4462 mTextView.getOffsetForPosition(eventX, eventY - fingerOffset); 4463 int startOffset; 4464 // Snap to word boundaries. 4465 if (mStartOffset < offset) { 4466 // Expanding with end handle. 4467 offset = getWordEnd(offset); 4468 startOffset = getWordStart(mStartOffset); 4469 } else { 4470 // Expanding with start handle. 4471 offset = getWordStart(offset); 4472 startOffset = getWordEnd(mStartOffset); 4473 } 4474 Selection.setSelection((Spannable) mTextView.getText(), 4475 startOffset, offset); 4476 } 4477 } 4478 break; 4479 4480 case MotionEvent.ACTION_UP: 4481 if (mDragAcceleratorActive) { 4482 // No longer dragging to select text, let the parent intercept events. 4483 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4484 4485 show(); 4486 int startOffset = mTextView.getSelectionStart(); 4487 int endOffset = mTextView.getSelectionEnd(); 4488 4489 // Since we don't let drag handles pass once they're visible, we need to 4490 // make sure the start / end locations are correct because the user *can* 4491 // switch directions during the initial drag. 4492 if (endOffset < startOffset) { 4493 int tmp = endOffset; 4494 endOffset = startOffset; 4495 startOffset = tmp; 4496 4497 // Also update the selection with the right offsets in this case. 4498 Selection.setSelection((Spannable) mTextView.getText(), 4499 startOffset, endOffset); 4500 } 4501 4502 // Need to do this to display the handles. 4503 mStartHandle.showAtLocation(startOffset); 4504 mEndHandle.showAtLocation(endOffset); 4505 4506 // No longer the first dragging motion, reset. 4507 startSelectionActionModeWithSelection(); 4508 mDragAcceleratorActive = false; 4509 mStartOffset = -1; 4510 } 4511 break; 4512 } 4513 } 4514 4515 /** 4516 * @param event 4517 */ 4518 private void updateMinAndMaxOffsets(MotionEvent event) { 4519 int pointerCount = event.getPointerCount(); 4520 for (int index = 0; index < pointerCount; index++) { 4521 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4522 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4523 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4524 } 4525 } 4526 4527 public int getMinTouchOffset() { 4528 return mMinTouchOffset; 4529 } 4530 4531 public int getMaxTouchOffset() { 4532 return mMaxTouchOffset; 4533 } 4534 4535 public void resetTouchOffsets() { 4536 mMinTouchOffset = mMaxTouchOffset = -1; 4537 mStartOffset = -1; 4538 mDragAcceleratorActive = false; 4539 } 4540 4541 /** 4542 * @return true iff this controller is currently used to move the selection start. 4543 */ 4544 public boolean isSelectionStartDragged() { 4545 return mStartHandle != null && mStartHandle.isDragging(); 4546 } 4547 4548 /** 4549 * @return true if the user is selecting text using the drag accelerator. 4550 */ 4551 public boolean isDragAcceleratorActive() { 4552 return mDragAcceleratorActive; 4553 } 4554 4555 public void onTouchModeChanged(boolean isInTouchMode) { 4556 if (!isInTouchMode) { 4557 hide(); 4558 } 4559 } 4560 4561 @Override 4562 public void onDetached() { 4563 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4564 observer.removeOnTouchModeChangeListener(this); 4565 4566 if (mStartHandle != null) mStartHandle.onDetached(); 4567 if (mEndHandle != null) mEndHandle.onDetached(); 4568 } 4569 } 4570 4571 private class CorrectionHighlighter { 4572 private final Path mPath = new Path(); 4573 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4574 private int mStart, mEnd; 4575 private long mFadingStartTime; 4576 private RectF mTempRectF; 4577 private final static int FADE_OUT_DURATION = 400; 4578 4579 public CorrectionHighlighter() { 4580 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4581 applicationScale); 4582 mPaint.setStyle(Paint.Style.FILL); 4583 } 4584 4585 public void highlight(CorrectionInfo info) { 4586 mStart = info.getOffset(); 4587 mEnd = mStart + info.getNewText().length(); 4588 mFadingStartTime = SystemClock.uptimeMillis(); 4589 4590 if (mStart < 0 || mEnd < 0) { 4591 stopAnimation(); 4592 } 4593 } 4594 4595 public void draw(Canvas canvas, int cursorOffsetVertical) { 4596 if (updatePath() && updatePaint()) { 4597 if (cursorOffsetVertical != 0) { 4598 canvas.translate(0, cursorOffsetVertical); 4599 } 4600 4601 canvas.drawPath(mPath, mPaint); 4602 4603 if (cursorOffsetVertical != 0) { 4604 canvas.translate(0, -cursorOffsetVertical); 4605 } 4606 invalidate(true); // TODO invalidate cursor region only 4607 } else { 4608 stopAnimation(); 4609 invalidate(false); // TODO invalidate cursor region only 4610 } 4611 } 4612 4613 private boolean updatePaint() { 4614 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4615 if (duration > FADE_OUT_DURATION) return false; 4616 4617 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4618 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4619 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4620 ((int) (highlightColorAlpha * coef) << 24); 4621 mPaint.setColor(color); 4622 return true; 4623 } 4624 4625 private boolean updatePath() { 4626 final Layout layout = mTextView.getLayout(); 4627 if (layout == null) return false; 4628 4629 // Update in case text is edited while the animation is run 4630 final int length = mTextView.getText().length(); 4631 int start = Math.min(length, mStart); 4632 int end = Math.min(length, mEnd); 4633 4634 mPath.reset(); 4635 layout.getSelectionPath(start, end, mPath); 4636 return true; 4637 } 4638 4639 private void invalidate(boolean delayed) { 4640 if (mTextView.getLayout() == null) return; 4641 4642 if (mTempRectF == null) mTempRectF = new RectF(); 4643 mPath.computeBounds(mTempRectF, false); 4644 4645 int left = mTextView.getCompoundPaddingLeft(); 4646 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4647 4648 if (delayed) { 4649 mTextView.postInvalidateOnAnimation( 4650 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4651 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4652 } else { 4653 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4654 (int) mTempRectF.right, (int) mTempRectF.bottom); 4655 } 4656 } 4657 4658 private void stopAnimation() { 4659 Editor.this.mCorrectionHighlighter = null; 4660 } 4661 } 4662 4663 private static class ErrorPopup extends PopupWindow { 4664 private boolean mAbove = false; 4665 private final TextView mView; 4666 private int mPopupInlineErrorBackgroundId = 0; 4667 private int mPopupInlineErrorAboveBackgroundId = 0; 4668 4669 ErrorPopup(TextView v, int width, int height) { 4670 super(v, width, height); 4671 mView = v; 4672 // Make sure the TextView has a background set as it will be used the first time it is 4673 // shown and positioned. Initialized with below background, which should have 4674 // dimensions identical to the above version for this to work (and is more likely). 4675 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4676 com.android.internal.R.styleable.Theme_errorMessageBackground); 4677 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4678 } 4679 4680 void fixDirection(boolean above) { 4681 mAbove = above; 4682 4683 if (above) { 4684 mPopupInlineErrorAboveBackgroundId = 4685 getResourceId(mPopupInlineErrorAboveBackgroundId, 4686 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4687 } else { 4688 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4689 com.android.internal.R.styleable.Theme_errorMessageBackground); 4690 } 4691 4692 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4693 mPopupInlineErrorBackgroundId); 4694 } 4695 4696 private int getResourceId(int currentId, int index) { 4697 if (currentId == 0) { 4698 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4699 R.styleable.Theme); 4700 currentId = styledAttributes.getResourceId(index, 0); 4701 styledAttributes.recycle(); 4702 } 4703 return currentId; 4704 } 4705 4706 @Override 4707 public void update(int x, int y, int w, int h, boolean force) { 4708 super.update(x, y, w, h, force); 4709 4710 boolean above = isAboveAnchor(); 4711 if (above != mAbove) { 4712 fixDirection(above); 4713 } 4714 } 4715 } 4716 4717 static class InputContentType { 4718 int imeOptions = EditorInfo.IME_NULL; 4719 String privateImeOptions; 4720 CharSequence imeActionLabel; 4721 int imeActionId; 4722 Bundle extras; 4723 OnEditorActionListener onEditorActionListener; 4724 boolean enterDown; 4725 } 4726 4727 static class InputMethodState { 4728 ExtractedTextRequest mExtractedTextRequest; 4729 final ExtractedText mExtractedText = new ExtractedText(); 4730 int mBatchEditNesting; 4731 boolean mCursorChanged; 4732 boolean mSelectionModeChanged; 4733 boolean mContentChanged; 4734 int mChangedStart, mChangedEnd, mChangedDelta; 4735 } 4736 4737 /** 4738 * @return True iff (start, end) is a valid range within the text. 4739 */ 4740 private static boolean isValidRange(CharSequence text, int start, int end) { 4741 return 0 <= start && start <= end && end <= text.length(); 4742 } 4743 4744 /** 4745 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4746 * text being typed (and hence always returns null from the filter() method). 4747 */ 4748 public static class UndoInputFilter implements InputFilter { 4749 private final Editor mEditor; 4750 4751 // Whether the current filter pass is directly caused by an end-user text edit. 4752 private boolean mIsUserEdit; 4753 4754 // Whether the text field is handling an IME composition. Must be parceled in case the user 4755 // rotates the screen during composition. 4756 private boolean mHasComposition; 4757 4758 public UndoInputFilter(Editor editor) { 4759 mEditor = editor; 4760 } 4761 4762 public void saveInstanceState(Parcel parcel) { 4763 parcel.writeInt(mIsUserEdit ? 1 : 0); 4764 parcel.writeInt(mHasComposition ? 1 : 0); 4765 } 4766 4767 public void restoreInstanceState(Parcel parcel) { 4768 mIsUserEdit = parcel.readInt() != 0; 4769 mHasComposition = parcel.readInt() != 0; 4770 } 4771 4772 /** 4773 * Signals that a user-triggered edit is starting. 4774 */ 4775 public void beginBatchEdit() { 4776 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4777 mIsUserEdit = true; 4778 } 4779 4780 public void endBatchEdit() { 4781 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4782 mIsUserEdit = false; 4783 } 4784 4785 @Override 4786 public CharSequence filter(CharSequence source, int start, int end, 4787 Spanned dest, int dstart, int dend) { 4788 if (DEBUG_UNDO) { 4789 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4790 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4791 } 4792 4793 // Check to see if this edit should be tracked for undo. 4794 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4795 return null; 4796 } 4797 4798 // Check for and handle IME composition edits. 4799 if (handleCompositionEdit(source, start, end, dstart)) { 4800 return null; 4801 } 4802 4803 // Handle keyboard edits. 4804 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4805 return null; 4806 } 4807 4808 /** 4809 * Returns true iff the edit was handled, either because it should be ignored or because 4810 * this function created an undo operation for it. 4811 */ 4812 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4813 // Ignore edits while the user is composing. 4814 if (isComposition(source)) { 4815 mHasComposition = true; 4816 return true; 4817 } 4818 final boolean hadComposition = mHasComposition; 4819 mHasComposition = false; 4820 4821 // Check for the transition out of the composing state. 4822 if (hadComposition) { 4823 // If there was no text the user canceled composition. Ignore the edit. 4824 if (start == end) { 4825 return true; 4826 } 4827 4828 // Otherwise the user inserted the composition. 4829 String newText = TextUtils.substring(source, start, end); 4830 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4831 recordEdit(edit, false /* forceMerge */); 4832 return true; 4833 } 4834 4835 // This was neither a composition event nor a transition out of composing. 4836 return false; 4837 } 4838 4839 private void handleKeyboardEdit(CharSequence source, int start, int end, 4840 Spanned dest, int dstart, int dend) { 4841 // An application may install a TextWatcher to provide additional modifications after 4842 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 4843 // string). This results in multiple filter() calls for what the user considers to be 4844 // a single operation. Always undo the whole set of changes in one step. 4845 final boolean forceMerge = isInTextWatcher(); 4846 4847 // Build a new operation with all the information from this edit. 4848 String newText = TextUtils.substring(source, start, end); 4849 String oldText = TextUtils.substring(dest, dstart, dend); 4850 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 4851 recordEdit(edit, forceMerge); 4852 } 4853 4854 /** 4855 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 4856 * If forceMerge is true then the new edit is always merged. 4857 */ 4858 private void recordEdit(EditOperation edit, boolean forceMerge) { 4859 // Fetch the last edit operation and attempt to merge in the new edit. 4860 final UndoManager um = mEditor.mUndoManager; 4861 um.beginUpdate("Edit text"); 4862 EditOperation lastEdit = um.getLastOperation( 4863 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 4864 if (lastEdit == null) { 4865 // Add this as the first edit. 4866 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 4867 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4868 } else if (forceMerge) { 4869 // Forced merges take priority because they could be the result of a non-user-edit 4870 // change and this case should not create a new undo operation. 4871 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 4872 lastEdit.forceMergeWith(edit); 4873 } else if (!mIsUserEdit) { 4874 // An application directly modified the Editable outside of a text edit. Treat this 4875 // as a new change and don't attempt to merge. 4876 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 4877 um.commitState(mEditor.mUndoOwner); 4878 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4879 } else if (lastEdit.mergeWith(edit)) { 4880 // Merge succeeded, nothing else to do. 4881 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 4882 } else { 4883 // Could not merge with the last edit, so commit the last edit and add this edit. 4884 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 4885 um.commitState(mEditor.mUndoOwner); 4886 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 4887 } 4888 um.endUpdate(); 4889 } 4890 4891 private boolean canUndoEdit(CharSequence source, int start, int end, 4892 Spanned dest, int dstart, int dend) { 4893 if (!mEditor.mAllowUndo) { 4894 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 4895 return false; 4896 } 4897 4898 if (mEditor.mUndoManager.isInUndo()) { 4899 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 4900 return false; 4901 } 4902 4903 // Text filters run before input operations are applied. However, some input operations 4904 // are invalid and will throw exceptions when applied. This is common in tests. Don't 4905 // attempt to undo invalid operations. 4906 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 4907 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 4908 return false; 4909 } 4910 4911 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 4912 // on an input field. Skip no-op changes. 4913 if (start == end && dstart == dend) { 4914 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 4915 return false; 4916 } 4917 4918 return true; 4919 } 4920 4921 private boolean isComposition(CharSequence source) { 4922 if (!(source instanceof Spannable)) { 4923 return false; 4924 } 4925 // This is a composition edit if the source has a non-zero-length composing span. 4926 Spannable text = (Spannable) source; 4927 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 4928 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 4929 return composeBegin < composeEnd; 4930 } 4931 4932 private boolean isInTextWatcher() { 4933 CharSequence text = mEditor.mTextView.getText(); 4934 return (text instanceof SpannableStringBuilder) 4935 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 4936 } 4937 } 4938 4939 /** 4940 * An operation to undo a single "edit" to a text view. 4941 */ 4942 public static class EditOperation extends UndoOperation<Editor> { 4943 private static final int TYPE_INSERT = 0; 4944 private static final int TYPE_DELETE = 1; 4945 private static final int TYPE_REPLACE = 2; 4946 4947 private int mType; 4948 private String mOldText; 4949 private int mOldTextStart; 4950 private String mNewText; 4951 private int mNewTextStart; 4952 4953 private int mOldCursorPos; 4954 private int mNewCursorPos; 4955 4956 /** 4957 * Constructs an edit operation from a text input operation on editor that replaces the 4958 * oldText starting at dstart with newText. 4959 */ 4960 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 4961 super(editor.mUndoOwner); 4962 mOldText = oldText; 4963 mNewText = newText; 4964 4965 // Determine the type of the edit and store where it occurred. Avoid storing 4966 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 4967 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 4968 // outside the bounds of the final text). 4969 if (mNewText.length() > 0 && mOldText.length() == 0) { 4970 mType = TYPE_INSERT; 4971 mNewTextStart = dstart; 4972 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 4973 mType = TYPE_DELETE; 4974 mOldTextStart = dstart; 4975 } else { 4976 mType = TYPE_REPLACE; 4977 mOldTextStart = mNewTextStart = dstart; 4978 } 4979 4980 // Store cursor data. 4981 mOldCursorPos = editor.mTextView.getSelectionStart(); 4982 mNewCursorPos = dstart + mNewText.length(); 4983 } 4984 4985 public EditOperation(Parcel src, ClassLoader loader) { 4986 super(src, loader); 4987 mType = src.readInt(); 4988 mOldText = src.readString(); 4989 mOldTextStart = src.readInt(); 4990 mNewText = src.readString(); 4991 mNewTextStart = src.readInt(); 4992 mOldCursorPos = src.readInt(); 4993 mNewCursorPos = src.readInt(); 4994 } 4995 4996 @Override 4997 public void writeToParcel(Parcel dest, int flags) { 4998 dest.writeInt(mType); 4999 dest.writeString(mOldText); 5000 dest.writeInt(mOldTextStart); 5001 dest.writeString(mNewText); 5002 dest.writeInt(mNewTextStart); 5003 dest.writeInt(mOldCursorPos); 5004 dest.writeInt(mNewCursorPos); 5005 } 5006 5007 private int getNewTextEnd() { 5008 return mNewTextStart + mNewText.length(); 5009 } 5010 5011 private int getOldTextEnd() { 5012 return mOldTextStart + mOldText.length(); 5013 } 5014 5015 @Override 5016 public void commit() { 5017 } 5018 5019 @Override 5020 public void undo() { 5021 if (DEBUG_UNDO) Log.d(TAG, "undo"); 5022 // Remove the new text and insert the old. 5023 Editor editor = getOwnerData(); 5024 Editable text = (Editable) editor.mTextView.getText(); 5025 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5026 mOldCursorPos); 5027 } 5028 5029 @Override 5030 public void redo() { 5031 if (DEBUG_UNDO) Log.d(TAG, "redo"); 5032 // Remove the old text and insert the new. 5033 Editor editor = getOwnerData(); 5034 Editable text = (Editable) editor.mTextView.getText(); 5035 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 5036 mNewCursorPos); 5037 } 5038 5039 /** 5040 * Attempts to merge this existing operation with a new edit. 5041 * @param edit The new edit operation. 5042 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 5043 * object unchanged. 5044 */ 5045 private boolean mergeWith(EditOperation edit) { 5046 if (DEBUG_UNDO) { 5047 Log.d(TAG, "mergeWith old " + this); 5048 Log.d(TAG, "mergeWith new " + edit); 5049 } 5050 switch (mType) { 5051 case TYPE_INSERT: 5052 return mergeInsertWith(edit); 5053 case TYPE_DELETE: 5054 return mergeDeleteWith(edit); 5055 case TYPE_REPLACE: 5056 return mergeReplaceWith(edit); 5057 default: 5058 return false; 5059 } 5060 } 5061 5062 private boolean mergeInsertWith(EditOperation edit) { 5063 // Only merge continuous insertions. 5064 if (edit.mType != TYPE_INSERT) { 5065 return false; 5066 } 5067 // Only merge insertions that are contiguous. 5068 if (getNewTextEnd() != edit.mNewTextStart) { 5069 return false; 5070 } 5071 mNewText += edit.mNewText; 5072 mNewCursorPos = edit.mNewCursorPos; 5073 return true; 5074 } 5075 5076 // TODO: Support forward delete. 5077 private boolean mergeDeleteWith(EditOperation edit) { 5078 // Only merge continuous deletes. 5079 if (edit.mType != TYPE_DELETE) { 5080 return false; 5081 } 5082 // Only merge deletions that are contiguous. 5083 if (mOldTextStart != edit.getOldTextEnd()) { 5084 return false; 5085 } 5086 mOldTextStart = edit.mOldTextStart; 5087 mOldText = edit.mOldText + mOldText; 5088 mNewCursorPos = edit.mNewCursorPos; 5089 return true; 5090 } 5091 5092 private boolean mergeReplaceWith(EditOperation edit) { 5093 // Replacements can merge only with adjacent inserts. 5094 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5095 return false; 5096 } 5097 mOldText += edit.mOldText; 5098 mNewText += edit.mNewText; 5099 mNewCursorPos = edit.mNewCursorPos; 5100 return true; 5101 } 5102 5103 /** 5104 * Forcibly creates a single merged edit operation by simulating the entire text 5105 * contents being replaced. 5106 */ 5107 public void forceMergeWith(EditOperation edit) { 5108 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5109 Editor editor = getOwnerData(); 5110 5111 // Copy the text of the current field. 5112 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5113 // but would require two parallel implementations of modifyText() because Editable and 5114 // StringBuilder do not share an interface for replace/delete/insert. 5115 Editable editable = (Editable) editor.mTextView.getText(); 5116 Editable originalText = new SpannableStringBuilder(editable.toString()); 5117 5118 // Roll back the last operation. 5119 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5120 mOldCursorPos); 5121 5122 // Clone the text again and apply the new operation. 5123 Editable finalText = new SpannableStringBuilder(editable.toString()); 5124 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5125 edit.mNewTextStart, edit.mNewCursorPos); 5126 5127 // Convert this operation into a non-mergeable replacement of the entire string. 5128 mType = TYPE_REPLACE; 5129 mNewText = finalText.toString(); 5130 mNewTextStart = 0; 5131 mOldText = originalText.toString(); 5132 mOldTextStart = 0; 5133 mNewCursorPos = edit.mNewCursorPos; 5134 // mOldCursorPos is unchanged. 5135 } 5136 5137 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5138 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5139 // Apply the edit if it is still valid. 5140 if (isValidRange(text, deleteFrom, deleteTo) && 5141 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5142 if (deleteFrom != deleteTo) { 5143 text.delete(deleteFrom, deleteTo); 5144 } 5145 if (newText.length() != 0) { 5146 text.insert(newTextInsertAt, newText); 5147 } 5148 } 5149 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5150 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5151 // TODO: Select all the text that was undone. 5152 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5153 Selection.setSelection(text, newCursorPos); 5154 } 5155 } 5156 5157 private String getTypeString() { 5158 switch (mType) { 5159 case TYPE_INSERT: 5160 return "insert"; 5161 case TYPE_DELETE: 5162 return "delete"; 5163 case TYPE_REPLACE: 5164 return "replace"; 5165 default: 5166 return ""; 5167 } 5168 } 5169 5170 @Override 5171 public String toString() { 5172 return "[mType=" + getTypeString() + ", " + 5173 "mOldText=" + mOldText + ", " + 5174 "mOldTextStart=" + mOldTextStart + ", " + 5175 "mNewText=" + mNewText + ", " + 5176 "mNewTextStart=" + mNewTextStart + ", " + 5177 "mOldCursorPos=" + mOldCursorPos + ", " + 5178 "mNewCursorPos=" + mNewCursorPos + "]"; 5179 } 5180 5181 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5182 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5183 @Override 5184 public EditOperation createFromParcel(Parcel in) { 5185 return new EditOperation(in, null); 5186 } 5187 5188 @Override 5189 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5190 return new EditOperation(in, loader); 5191 } 5192 5193 @Override 5194 public EditOperation[] newArray(int size) { 5195 return new EditOperation[size]; 5196 } 5197 }; 5198 } 5199} 5200