Editor.java revision 838307275214cb9b51dff15a401013420aa4376a
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 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 126 // Tag used when the Editor maintains its own separate UndoManager. 127 private static final String UNDO_OWNER_TAG = "Editor"; 128 129 // Ordering constants used to place the Action Mode items in their menu. 130 private static final int MENU_ITEM_ORDER_CUT = 1; 131 private static final int MENU_ITEM_ORDER_COPY = 2; 132 private static final int MENU_ITEM_ORDER_PASTE = 3; 133 private static final int MENU_ITEM_ORDER_SHARE = 4; 134 private static final int MENU_ITEM_ORDER_SELECT_ALL = 5; 135 private static final int MENU_ITEM_ORDER_REPLACE = 6; 136 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 10; 137 138 // Each Editor manages its own undo stack. 139 private final UndoManager mUndoManager = new UndoManager(); 140 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 141 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 142 boolean mAllowUndo = true; 143 144 // Cursor Controllers. 145 InsertionPointCursorController mInsertionPointCursorController; 146 SelectionModifierCursorController mSelectionModifierCursorController; 147 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 148 ActionMode mTextActionMode; 149 boolean mInsertionControllerEnabled; 150 boolean mSelectionControllerEnabled; 151 152 // Used to highlight a word when it is corrected by the IME 153 CorrectionHighlighter mCorrectionHighlighter; 154 155 InputContentType mInputContentType; 156 InputMethodState mInputMethodState; 157 158 private static class TextRenderNode { 159 RenderNode renderNode; 160 boolean isDirty; 161 public TextRenderNode(String name) { 162 isDirty = true; 163 renderNode = RenderNode.create(name, null); 164 } 165 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 166 } 167 TextRenderNode[] mTextRenderNodes; 168 169 boolean mFrozenWithFocus; 170 boolean mSelectionMoved; 171 boolean mTouchFocusSelected; 172 173 KeyListener mKeyListener; 174 int mInputType = EditorInfo.TYPE_NULL; 175 176 boolean mDiscardNextActionUp; 177 boolean mIgnoreActionUpEvent; 178 179 long mShowCursor; 180 Blink mBlink; 181 182 boolean mCursorVisible = true; 183 boolean mSelectAllOnFocus; 184 boolean mTextIsSelectable; 185 186 CharSequence mError; 187 boolean mErrorWasChanged; 188 ErrorPopup mErrorPopup; 189 190 /** 191 * This flag is set if the TextView tries to display an error before it 192 * is attached to the window (so its position is still unknown). 193 * It causes the error to be shown later, when onAttachedToWindow() 194 * is called. 195 */ 196 boolean mShowErrorAfterAttach; 197 198 boolean mInBatchEditControllers; 199 boolean mShowSoftInputOnFocus = true; 200 boolean mPreserveDetachedSelection; 201 boolean mTemporaryDetach; 202 203 SuggestionsPopupWindow mSuggestionsPopupWindow; 204 SuggestionRangeSpan mSuggestionRangeSpan; 205 Runnable mShowSuggestionRunnable; 206 207 final Drawable[] mCursorDrawable = new Drawable[2]; 208 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 209 210 private Drawable mSelectHandleLeft; 211 private Drawable mSelectHandleRight; 212 private Drawable mSelectHandleCenter; 213 214 // Global listener that detects changes in the global position of the TextView 215 private PositionListener mPositionListener; 216 217 float mLastDownPositionX, mLastDownPositionY; 218 Callback mCustomSelectionActionModeCallback; 219 Callback mCustomInsertionActionModeCallback; 220 221 // Set when this TextView gained focus with some text selected. Will start selection mode. 222 boolean mCreatedWithASelection; 223 224 boolean mDoubleTap = false; 225 226 private Runnable mInsertionActionModeRunnable; 227 228 // The span controller helps monitoring the changes to which the Editor needs to react: 229 // - EasyEditSpans, for which we have some UI to display on attach and on hide 230 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 231 private SpanController mSpanController; 232 233 WordIterator mWordIterator; 234 SpellChecker mSpellChecker; 235 236 // This word iterator is set with text and used to determine word boundaries 237 // when a user is selecting text. 238 private WordIterator mWordIteratorWithText; 239 // Indicate that the text in the word iterator needs to be updated. 240 private boolean mUpdateWordIteratorText; 241 242 private Rect mTempRect; 243 244 private TextView mTextView; 245 246 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 247 248 private final Runnable mShowFloatingToolbar = new Runnable() { 249 @Override 250 public void run() { 251 if (mTextActionMode != null) { 252 mTextActionMode.hide(0); // hide off. 253 } 254 } 255 }; 256 257 boolean mIsInsertionActionModeStartPending = false; 258 259 Editor(TextView textView) { 260 mTextView = textView; 261 // Synchronize the filter list, which places the undo input filter at the end. 262 mTextView.setFilters(mTextView.getFilters()); 263 } 264 265 ParcelableParcel saveInstanceState() { 266 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 267 Parcel parcel = state.getParcel(); 268 mUndoManager.saveInstanceState(parcel); 269 mUndoInputFilter.saveInstanceState(parcel); 270 return state; 271 } 272 273 void restoreInstanceState(ParcelableParcel state) { 274 Parcel parcel = state.getParcel(); 275 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 276 mUndoInputFilter.restoreInstanceState(parcel); 277 // Re-associate this object as the owner of undo state. 278 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 279 } 280 281 /** 282 * Forgets all undo and redo operations for this Editor. 283 */ 284 void forgetUndoRedo() { 285 UndoOwner[] owners = { mUndoOwner }; 286 mUndoManager.forgetUndos(owners, -1 /* all */); 287 mUndoManager.forgetRedos(owners, -1 /* all */); 288 } 289 290 boolean canUndo() { 291 UndoOwner[] owners = { mUndoOwner }; 292 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 293 } 294 295 boolean canRedo() { 296 UndoOwner[] owners = { mUndoOwner }; 297 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 298 } 299 300 void undo() { 301 if (!mAllowUndo) { 302 return; 303 } 304 UndoOwner[] owners = { mUndoOwner }; 305 mUndoManager.undo(owners, 1); // Undo 1 action. 306 } 307 308 void redo() { 309 if (!mAllowUndo) { 310 return; 311 } 312 UndoOwner[] owners = { mUndoOwner }; 313 mUndoManager.redo(owners, 1); // Redo 1 action. 314 } 315 316 void replace() { 317 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 318 stopTextActionMode(); 319 Selection.setSelection((Spannable) mTextView.getText(), middle); 320 showSuggestions(); 321 } 322 323 void onAttachedToWindow() { 324 if (mShowErrorAfterAttach) { 325 showError(); 326 mShowErrorAfterAttach = false; 327 } 328 mTemporaryDetach = false; 329 330 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 331 // No need to create the controller. 332 // The get method will add the listener on controller creation. 333 if (mInsertionPointCursorController != null) { 334 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 335 } 336 if (mSelectionModifierCursorController != null) { 337 mSelectionModifierCursorController.resetTouchOffsets(); 338 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 339 } 340 updateSpellCheckSpans(0, mTextView.getText().length(), 341 true /* create the spell checker if needed */); 342 343 if (mTextView.hasTransientState() && 344 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 345 // Since transient state is reference counted make sure it stays matched 346 // with our own calls to it for managing selection. 347 // The action mode callback will set this back again when/if the action mode starts. 348 mTextView.setHasTransientState(false); 349 350 // We had an active selection from before, start the selection mode. 351 startSelectionActionMode(); 352 } 353 354 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 355 resumeBlink(); 356 } 357 358 void onDetachedFromWindow() { 359 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 360 361 if (mError != null) { 362 hideError(); 363 } 364 365 suspendBlink(); 366 367 if (mInsertionPointCursorController != null) { 368 mInsertionPointCursorController.onDetached(); 369 } 370 371 if (mSelectionModifierCursorController != null) { 372 mSelectionModifierCursorController.onDetached(); 373 } 374 375 if (mShowSuggestionRunnable != null) { 376 mTextView.removeCallbacks(mShowSuggestionRunnable); 377 } 378 379 // Cancel the single tap delayed runnable. 380 if (mInsertionActionModeRunnable != null) { 381 mTextView.removeCallbacks(mInsertionActionModeRunnable); 382 } 383 384 mTextView.removeCallbacks(mShowFloatingToolbar); 385 386 destroyDisplayListsData(); 387 388 if (mSpellChecker != null) { 389 mSpellChecker.closeSession(); 390 // Forces the creation of a new SpellChecker next time this window is created. 391 // Will handle the cases where the settings has been changed in the meantime. 392 mSpellChecker = null; 393 } 394 395 mPreserveDetachedSelection = true; 396 hideControllers(); 397 stopTextActionMode(); 398 mPreserveDetachedSelection = false; 399 mTemporaryDetach = false; 400 } 401 402 private void destroyDisplayListsData() { 403 if (mTextRenderNodes != null) { 404 for (int i = 0; i < mTextRenderNodes.length; i++) { 405 RenderNode displayList = mTextRenderNodes[i] != null 406 ? mTextRenderNodes[i].renderNode : null; 407 if (displayList != null && displayList.isValid()) { 408 displayList.destroyDisplayListData(); 409 } 410 } 411 } 412 } 413 414 private void showError() { 415 if (mTextView.getWindowToken() == null) { 416 mShowErrorAfterAttach = true; 417 return; 418 } 419 420 if (mErrorPopup == null) { 421 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 422 final TextView err = (TextView) inflater.inflate( 423 com.android.internal.R.layout.textview_hint, null); 424 425 final float scale = mTextView.getResources().getDisplayMetrics().density; 426 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 427 mErrorPopup.setFocusable(false); 428 // The user is entering text, so the input method is needed. We 429 // don't want the popup to be displayed on top of it. 430 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 431 } 432 433 TextView tv = (TextView) mErrorPopup.getContentView(); 434 chooseSize(mErrorPopup, mError, tv); 435 tv.setText(mError); 436 437 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 438 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 439 } 440 441 public void setError(CharSequence error, Drawable icon) { 442 mError = TextUtils.stringOrSpannedString(error); 443 mErrorWasChanged = true; 444 445 if (mError == null) { 446 setErrorIcon(null); 447 if (mErrorPopup != null) { 448 if (mErrorPopup.isShowing()) { 449 mErrorPopup.dismiss(); 450 } 451 452 mErrorPopup = null; 453 } 454 mShowErrorAfterAttach = false; 455 } else { 456 setErrorIcon(icon); 457 if (mTextView.isFocused()) { 458 showError(); 459 } 460 } 461 } 462 463 private void setErrorIcon(Drawable icon) { 464 Drawables dr = mTextView.mDrawables; 465 if (dr == null) { 466 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 467 } 468 dr.setErrorDrawable(icon, mTextView); 469 470 mTextView.resetResolvedDrawables(); 471 mTextView.invalidate(); 472 mTextView.requestLayout(); 473 } 474 475 private void hideError() { 476 if (mErrorPopup != null) { 477 if (mErrorPopup.isShowing()) { 478 mErrorPopup.dismiss(); 479 } 480 } 481 482 mShowErrorAfterAttach = false; 483 } 484 485 /** 486 * Returns the X offset to make the pointy top of the error point 487 * at the middle of the error icon. 488 */ 489 private int getErrorX() { 490 /* 491 * The "25" is the distance between the point and the right edge 492 * of the background 493 */ 494 final float scale = mTextView.getResources().getDisplayMetrics().density; 495 496 final Drawables dr = mTextView.mDrawables; 497 498 final int layoutDirection = mTextView.getLayoutDirection(); 499 int errorX; 500 int offset; 501 switch (layoutDirection) { 502 default: 503 case View.LAYOUT_DIRECTION_LTR: 504 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 505 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 506 mTextView.getPaddingRight() + offset; 507 break; 508 case View.LAYOUT_DIRECTION_RTL: 509 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 510 errorX = mTextView.getPaddingLeft() + offset; 511 break; 512 } 513 return errorX; 514 } 515 516 /** 517 * Returns the Y offset to make the pointy top of the error point 518 * at the bottom of the error icon. 519 */ 520 private int getErrorY() { 521 /* 522 * Compound, not extended, because the icon is not clipped 523 * if the text height is smaller. 524 */ 525 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 526 int vspace = mTextView.getBottom() - mTextView.getTop() - 527 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 528 529 final Drawables dr = mTextView.mDrawables; 530 531 final int layoutDirection = mTextView.getLayoutDirection(); 532 int height; 533 switch (layoutDirection) { 534 default: 535 case View.LAYOUT_DIRECTION_LTR: 536 height = (dr != null ? dr.mDrawableHeightRight : 0); 537 break; 538 case View.LAYOUT_DIRECTION_RTL: 539 height = (dr != null ? dr.mDrawableHeightLeft : 0); 540 break; 541 } 542 543 int icontop = compoundPaddingTop + (vspace - height) / 2; 544 545 /* 546 * The "2" is the distance between the point and the top edge 547 * of the background. 548 */ 549 final float scale = mTextView.getResources().getDisplayMetrics().density; 550 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 551 } 552 553 void createInputContentTypeIfNeeded() { 554 if (mInputContentType == null) { 555 mInputContentType = new InputContentType(); 556 } 557 } 558 559 void createInputMethodStateIfNeeded() { 560 if (mInputMethodState == null) { 561 mInputMethodState = new InputMethodState(); 562 } 563 } 564 565 boolean isCursorVisible() { 566 // The default value is true, even when there is no associated Editor 567 return mCursorVisible && mTextView.isTextEditable(); 568 } 569 570 void prepareCursorControllers() { 571 boolean windowSupportsHandles = false; 572 573 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 574 if (params instanceof WindowManager.LayoutParams) { 575 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 576 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 577 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 578 } 579 580 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 581 mInsertionControllerEnabled = enabled && isCursorVisible(); 582 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 583 584 if (!mInsertionControllerEnabled) { 585 hideInsertionPointCursorController(); 586 if (mInsertionPointCursorController != null) { 587 mInsertionPointCursorController.onDetached(); 588 mInsertionPointCursorController = null; 589 } 590 } 591 592 if (!mSelectionControllerEnabled) { 593 stopTextActionMode(); 594 if (mSelectionModifierCursorController != null) { 595 mSelectionModifierCursorController.onDetached(); 596 mSelectionModifierCursorController = null; 597 } 598 } 599 } 600 601 void hideInsertionPointCursorController() { 602 if (mInsertionPointCursorController != null) { 603 mInsertionPointCursorController.hide(); 604 } 605 } 606 607 /** 608 * Hides the insertion controller and stops text selection mode, hiding the selection controller 609 */ 610 void hideControllers() { 611 hideCursorControllers(); 612 hideSpanControllers(); 613 } 614 615 private void hideSpanControllers() { 616 if (mSpanController != null) { 617 mSpanController.hide(); 618 } 619 } 620 621 private void hideCursorControllers() { 622 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 623 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 624 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 625 // to distinguish one from the other. 626 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) || 627 !mSuggestionsPopupWindow.isShowingUp())) { 628 // Should be done before hide insertion point controller since it triggers a show of it 629 mSuggestionsPopupWindow.hide(); 630 } 631 hideInsertionPointCursorController(); 632 } 633 634 /** 635 * Create new SpellCheckSpans on the modified region. 636 */ 637 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 638 // Remove spans whose adjacent characters are text not punctuation 639 mTextView.removeAdjacentSuggestionSpans(start); 640 mTextView.removeAdjacentSuggestionSpans(end); 641 642 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 643 !(mTextView.isInExtractedMode())) { 644 if (mSpellChecker == null && createSpellChecker) { 645 mSpellChecker = new SpellChecker(mTextView); 646 } 647 if (mSpellChecker != null) { 648 mSpellChecker.spellCheck(start, end); 649 } 650 } 651 } 652 653 void onScreenStateChanged(int screenState) { 654 switch (screenState) { 655 case View.SCREEN_STATE_ON: 656 resumeBlink(); 657 break; 658 case View.SCREEN_STATE_OFF: 659 suspendBlink(); 660 break; 661 } 662 } 663 664 private void suspendBlink() { 665 if (mBlink != null) { 666 mBlink.cancel(); 667 } 668 } 669 670 private void resumeBlink() { 671 if (mBlink != null) { 672 mBlink.uncancel(); 673 makeBlink(); 674 } 675 } 676 677 void adjustInputType(boolean password, boolean passwordInputType, 678 boolean webPasswordInputType, boolean numberPasswordInputType) { 679 // mInputType has been set from inputType, possibly modified by mInputMethod. 680 // Specialize mInputType to [web]password if we have a text class and the original input 681 // type was a password. 682 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 683 if (password || passwordInputType) { 684 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 685 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 686 } 687 if (webPasswordInputType) { 688 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 689 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 690 } 691 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 692 if (numberPasswordInputType) { 693 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 694 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 695 } 696 } 697 } 698 699 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 700 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 701 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 702 703 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 704 com.android.internal.R.dimen.textview_error_popup_default_width); 705 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 706 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 707 float max = 0; 708 for (int i = 0; i < l.getLineCount(); i++) { 709 max = Math.max(max, l.getLineWidth(i)); 710 } 711 712 /* 713 * Now set the popup size to be big enough for the text plus the border capped 714 * to DEFAULT_MAX_POPUP_WIDTH 715 */ 716 pop.setWidth(wid + (int) Math.ceil(max)); 717 pop.setHeight(ht + l.getHeight()); 718 } 719 720 void setFrame() { 721 if (mErrorPopup != null) { 722 TextView tv = (TextView) mErrorPopup.getContentView(); 723 chooseSize(mErrorPopup, mError, tv); 724 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 725 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 726 } 727 } 728 729 private int getWordStart(int offset) { 730 // FIXME - For this and similar methods we're not doing anything to check if there's 731 // a LocaleSpan in the text, this may be something we should try handling or checking for. 732 int retOffset = getWordIteratorWithText().prevBoundary(offset); 733 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 734 // On punctuation boundary or within group of punctuation, find punctuation start. 735 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 736 } else { 737 // Not on a punctuation boundary, find the word start. 738 retOffset = getWordIteratorWithText().getBeginning(offset); 739 } 740 if (retOffset == BreakIterator.DONE) { 741 return offset; 742 } 743 return retOffset; 744 } 745 746 private int getWordEnd(int offset) { 747 int retOffset = getWordIteratorWithText().nextBoundary(offset); 748 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 749 // On punctuation boundary or within group of punctuation, find punctuation end. 750 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 751 } else { 752 // Not on a punctuation boundary, find the word end. 753 retOffset = getWordIteratorWithText().getEnd(offset); 754 } 755 if (retOffset == BreakIterator.DONE) { 756 return offset; 757 } 758 return retOffset; 759 } 760 761 /** 762 * Adjusts selection to the word under last touch offset. Return true if the operation was 763 * successfully performed. 764 */ 765 private boolean selectCurrentWord() { 766 if (!mTextView.canSelectText()) { 767 return false; 768 } 769 770 if (mTextView.hasPasswordTransformationMethod()) { 771 // Always select all on a password field. 772 // Cut/copy menu entries are not available for passwords, but being able to select all 773 // is however useful to delete or paste to replace the entire content. 774 return mTextView.selectAllText(); 775 } 776 777 int inputType = mTextView.getInputType(); 778 int klass = inputType & InputType.TYPE_MASK_CLASS; 779 int variation = inputType & InputType.TYPE_MASK_VARIATION; 780 781 // Specific text field types: select the entire text for these 782 if (klass == InputType.TYPE_CLASS_NUMBER || 783 klass == InputType.TYPE_CLASS_PHONE || 784 klass == InputType.TYPE_CLASS_DATETIME || 785 variation == InputType.TYPE_TEXT_VARIATION_URI || 786 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 787 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 788 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 789 return mTextView.selectAllText(); 790 } 791 792 long lastTouchOffsets = getLastTouchOffsets(); 793 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 794 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 795 796 // Safety check in case standard touch event handling has been bypassed 797 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 798 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 799 800 int selectionStart, selectionEnd; 801 802 // If a URLSpan (web address, email, phone...) is found at that position, select it. 803 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 804 getSpans(minOffset, maxOffset, URLSpan.class); 805 if (urlSpans.length >= 1) { 806 URLSpan urlSpan = urlSpans[0]; 807 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 808 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 809 } else { 810 // FIXME - We should check if there's a LocaleSpan in the text, this may be 811 // something we should try handling or checking for. 812 final WordIterator wordIterator = getWordIterator(); 813 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 814 815 selectionStart = wordIterator.getBeginning(minOffset); 816 selectionEnd = wordIterator.getEnd(maxOffset); 817 818 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 819 selectionStart == selectionEnd) { 820 // Possible when the word iterator does not properly handle the text's language 821 long range = getCharClusterRange(minOffset); 822 selectionStart = TextUtils.unpackRangeStartFromLong(range); 823 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 824 } 825 } 826 827 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 828 return selectionEnd > selectionStart; 829 } 830 831 void onLocaleChanged() { 832 // Will be re-created on demand in getWordIterator with the proper new locale 833 mWordIterator = null; 834 mWordIteratorWithText = null; 835 } 836 837 /** 838 * @hide 839 */ 840 public WordIterator getWordIterator() { 841 if (mWordIterator == null) { 842 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 843 } 844 return mWordIterator; 845 } 846 847 private WordIterator getWordIteratorWithText() { 848 if (mWordIteratorWithText == null) { 849 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 850 mUpdateWordIteratorText = true; 851 } 852 if (mUpdateWordIteratorText) { 853 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 854 // to the user's selection is needed. A possible solution would be to 855 // copy some number N of characters near the selection and then when the 856 // user approaches N then we'd do another copy of the next N characters. 857 CharSequence text = mTextView.getText(); 858 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 859 mUpdateWordIteratorText = false; 860 } 861 return mWordIteratorWithText; 862 } 863 864 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 865 final Layout layout = mTextView.getLayout(); 866 if (layout == null) return offset; 867 final CharSequence text = mTextView.getText(); 868 final int nextOffset = layout.getPaint().getTextRunCursor(text, 0, text.length(), 869 layout.isRtlCharAt(offset) ? Paint.DIRECTION_RTL : Paint.DIRECTION_LTR, 870 offset, findAfterGivenOffset ? Paint.CURSOR_AFTER : Paint.CURSOR_BEFORE); 871 return nextOffset == -1 ? offset : nextOffset; 872 } 873 874 private long getCharClusterRange(int offset) { 875 final int textLength = mTextView.getText().length(); 876 if (offset < textLength) { 877 return TextUtils.packRangeInLong(offset, getNextCursorOffset(offset, true)); 878 } 879 if (offset - 1 >= 0) { 880 return TextUtils.packRangeInLong(getNextCursorOffset(offset, false), offset); 881 } 882 return TextUtils.packRangeInLong(offset, offset); 883 } 884 885 private boolean touchPositionIsInSelection() { 886 int selectionStart = mTextView.getSelectionStart(); 887 int selectionEnd = mTextView.getSelectionEnd(); 888 889 if (selectionStart == selectionEnd) { 890 return false; 891 } 892 893 if (selectionStart > selectionEnd) { 894 int tmp = selectionStart; 895 selectionStart = selectionEnd; 896 selectionEnd = tmp; 897 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 898 } 899 900 SelectionModifierCursorController selectionController = getSelectionController(); 901 int minOffset = selectionController.getMinTouchOffset(); 902 int maxOffset = selectionController.getMaxTouchOffset(); 903 904 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 905 } 906 907 private PositionListener getPositionListener() { 908 if (mPositionListener == null) { 909 mPositionListener = new PositionListener(); 910 } 911 return mPositionListener; 912 } 913 914 private interface TextViewPositionListener { 915 public void updatePosition(int parentPositionX, int parentPositionY, 916 boolean parentPositionChanged, boolean parentScrolled); 917 } 918 919 private boolean isPositionVisible(final float positionX, final float positionY) { 920 synchronized (TEMP_POSITION) { 921 final float[] position = TEMP_POSITION; 922 position[0] = positionX; 923 position[1] = positionY; 924 View view = mTextView; 925 926 while (view != null) { 927 if (view != mTextView) { 928 // Local scroll is already taken into account in positionX/Y 929 position[0] -= view.getScrollX(); 930 position[1] -= view.getScrollY(); 931 } 932 933 if (position[0] < 0 || position[1] < 0 || 934 position[0] > view.getWidth() || position[1] > view.getHeight()) { 935 return false; 936 } 937 938 if (!view.getMatrix().isIdentity()) { 939 view.getMatrix().mapPoints(position); 940 } 941 942 position[0] += view.getLeft(); 943 position[1] += view.getTop(); 944 945 final ViewParent parent = view.getParent(); 946 if (parent instanceof View) { 947 view = (View) parent; 948 } else { 949 // We've reached the ViewRoot, stop iterating 950 view = null; 951 } 952 } 953 } 954 955 // We've been able to walk up the view hierarchy and the position was never clipped 956 return true; 957 } 958 959 private boolean isOffsetVisible(int offset) { 960 Layout layout = mTextView.getLayout(); 961 if (layout == null) return false; 962 963 final int line = layout.getLineForOffset(offset); 964 final int lineBottom = layout.getLineBottom(line); 965 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 966 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 967 lineBottom + mTextView.viewportToContentVerticalOffset()); 968 } 969 970 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 971 * in the view. Returns false when the position is in the empty space of left/right of text. 972 */ 973 private boolean isPositionOnText(float x, float y) { 974 Layout layout = mTextView.getLayout(); 975 if (layout == null) return false; 976 977 final int line = mTextView.getLineAtCoordinate(y); 978 x = mTextView.convertToLocalHorizontalCoordinate(x); 979 980 if (x < layout.getLineLeft(line)) return false; 981 if (x > layout.getLineRight(line)) return false; 982 return true; 983 } 984 985 public boolean performLongClick(boolean handled) { 986 // Long press in empty space moves cursor and starts the insertion action mode. 987 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 988 mInsertionControllerEnabled) { 989 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 990 mLastDownPositionY); 991 stopTextActionMode(); 992 Selection.setSelection((Spannable) mTextView.getText(), offset); 993 getInsertionController().show(); 994 mIsInsertionActionModeStartPending = true; 995 handled = true; 996 } 997 998 if (!handled && mTextActionMode != null) { 999 if (touchPositionIsInSelection()) { 1000 // Start a drag 1001 final int start = mTextView.getSelectionStart(); 1002 final int end = mTextView.getSelectionEnd(); 1003 CharSequence selectedText = mTextView.getTransformedText(start, end); 1004 ClipData data = ClipData.newPlainText(null, selectedText); 1005 DragLocalState localState = new DragLocalState(mTextView, start, end); 1006 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 1007 View.DRAG_FLAG_GLOBAL); 1008 stopTextActionMode(); 1009 } else { 1010 stopTextActionMode(); 1011 selectCurrentWordAndStartDrag(); 1012 } 1013 handled = true; 1014 } 1015 1016 // Start a new selection 1017 if (!handled) { 1018 handled = selectCurrentWordAndStartDrag(); 1019 } 1020 1021 return handled; 1022 } 1023 1024 private long getLastTouchOffsets() { 1025 SelectionModifierCursorController selectionController = getSelectionController(); 1026 final int minOffset = selectionController.getMinTouchOffset(); 1027 final int maxOffset = selectionController.getMaxTouchOffset(); 1028 return TextUtils.packRangeInLong(minOffset, maxOffset); 1029 } 1030 1031 void onFocusChanged(boolean focused, int direction) { 1032 mShowCursor = SystemClock.uptimeMillis(); 1033 ensureEndedBatchEdit(); 1034 1035 if (focused) { 1036 int selStart = mTextView.getSelectionStart(); 1037 int selEnd = mTextView.getSelectionEnd(); 1038 1039 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1040 // mode for these, unless there was a specific selection already started. 1041 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1042 selEnd == mTextView.getText().length(); 1043 1044 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1045 !isFocusHighlighted; 1046 1047 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1048 // If a tap was used to give focus to that view, move cursor at tap position. 1049 // Has to be done before onTakeFocus, which can be overloaded. 1050 final int lastTapPosition = getLastTapPosition(); 1051 if (lastTapPosition >= 0) { 1052 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1053 } 1054 1055 // Note this may have to be moved out of the Editor class 1056 MovementMethod mMovement = mTextView.getMovementMethod(); 1057 if (mMovement != null) { 1058 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1059 } 1060 1061 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1062 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1063 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1064 // This special case ensure that we keep current selection in that case. 1065 // It would be better to know why the DecorView does not have focus at that time. 1066 if (((mTextView.isInExtractedMode()) || mSelectionMoved) && 1067 selStart >= 0 && selEnd >= 0) { 1068 /* 1069 * Someone intentionally set the selection, so let them 1070 * do whatever it is that they wanted to do instead of 1071 * the default on-focus behavior. We reset the selection 1072 * here instead of just skipping the onTakeFocus() call 1073 * because some movement methods do something other than 1074 * just setting the selection in theirs and we still 1075 * need to go through that path. 1076 */ 1077 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1078 } 1079 1080 if (mSelectAllOnFocus) { 1081 mTextView.selectAllText(); 1082 } 1083 1084 mTouchFocusSelected = true; 1085 } 1086 1087 mFrozenWithFocus = false; 1088 mSelectionMoved = false; 1089 1090 if (mError != null) { 1091 showError(); 1092 } 1093 1094 makeBlink(); 1095 } else { 1096 if (mError != null) { 1097 hideError(); 1098 } 1099 // Don't leave us in the middle of a batch edit. 1100 mTextView.onEndBatchEdit(); 1101 1102 if (mTextView.isInExtractedMode()) { 1103 // terminateTextSelectionMode removes selection, which we want to keep when 1104 // ExtractEditText goes out of focus. 1105 final int selStart = mTextView.getSelectionStart(); 1106 final int selEnd = mTextView.getSelectionEnd(); 1107 hideControllers(); 1108 stopTextActionMode(); 1109 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1110 } else { 1111 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1112 hideControllers(); 1113 stopTextActionMode(); 1114 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1115 downgradeEasyCorrectionSpans(); 1116 } 1117 1118 // No need to create the controller 1119 if (mSelectionModifierCursorController != null) { 1120 mSelectionModifierCursorController.resetTouchOffsets(); 1121 } 1122 } 1123 } 1124 1125 /** 1126 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1127 * span. 1128 */ 1129 private void downgradeEasyCorrectionSpans() { 1130 CharSequence text = mTextView.getText(); 1131 if (text instanceof Spannable) { 1132 Spannable spannable = (Spannable) text; 1133 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1134 spannable.length(), SuggestionSpan.class); 1135 for (int i = 0; i < suggestionSpans.length; i++) { 1136 int flags = suggestionSpans[i].getFlags(); 1137 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1138 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1139 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1140 suggestionSpans[i].setFlags(flags); 1141 } 1142 } 1143 } 1144 } 1145 1146 void sendOnTextChanged(int start, int after) { 1147 updateSpellCheckSpans(start, start + after, false); 1148 1149 // Flip flag to indicate the word iterator needs to have the text reset. 1150 mUpdateWordIteratorText = true; 1151 1152 // Hide the controllers as soon as text is modified (typing, procedural...) 1153 // We do not hide the span controllers, since they can be added when a new text is 1154 // inserted into the text view (voice IME). 1155 hideCursorControllers(); 1156 // Reset drag accelerator. 1157 if (mSelectionModifierCursorController != null) { 1158 mSelectionModifierCursorController.resetTouchOffsets(); 1159 } 1160 stopTextActionMode(); 1161 } 1162 1163 private int getLastTapPosition() { 1164 // No need to create the controller at that point, no last tap position saved 1165 if (mSelectionModifierCursorController != null) { 1166 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1167 if (lastTapPosition >= 0) { 1168 // Safety check, should not be possible. 1169 if (lastTapPosition > mTextView.getText().length()) { 1170 lastTapPosition = mTextView.getText().length(); 1171 } 1172 return lastTapPosition; 1173 } 1174 } 1175 1176 return -1; 1177 } 1178 1179 void onWindowFocusChanged(boolean hasWindowFocus) { 1180 if (hasWindowFocus) { 1181 if (mBlink != null) { 1182 mBlink.uncancel(); 1183 makeBlink(); 1184 } 1185 } else { 1186 if (mBlink != null) { 1187 mBlink.cancel(); 1188 } 1189 if (mInputContentType != null) { 1190 mInputContentType.enterDown = false; 1191 } 1192 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1193 hideControllers(); 1194 if (mSuggestionsPopupWindow != null) { 1195 mSuggestionsPopupWindow.onParentLostFocus(); 1196 } 1197 1198 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1199 ensureEndedBatchEdit(); 1200 } 1201 } 1202 1203 void onTouchEvent(MotionEvent event) { 1204 updateFloatingToolbarVisibility(event); 1205 1206 if (hasSelectionController()) { 1207 getSelectionController().onTouchEvent(event); 1208 } 1209 1210 if (mShowSuggestionRunnable != null) { 1211 mTextView.removeCallbacks(mShowSuggestionRunnable); 1212 mShowSuggestionRunnable = null; 1213 } 1214 1215 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1216 mLastDownPositionX = event.getX(); 1217 mLastDownPositionY = event.getY(); 1218 1219 // Reset this state; it will be re-set if super.onTouchEvent 1220 // causes focus to move to the view. 1221 mTouchFocusSelected = false; 1222 mIgnoreActionUpEvent = false; 1223 } 1224 } 1225 1226 private void updateFloatingToolbarVisibility(MotionEvent event) { 1227 if (mTextActionMode != null) { 1228 switch (event.getActionMasked()) { 1229 case MotionEvent.ACTION_MOVE: 1230 hideFloatingToolbar(); 1231 break; 1232 case MotionEvent.ACTION_UP: // fall through 1233 case MotionEvent.ACTION_CANCEL: 1234 showFloatingToolbar(); 1235 } 1236 } 1237 } 1238 1239 private void hideFloatingToolbar() { 1240 if (mTextActionMode != null) { 1241 mTextView.removeCallbacks(mShowFloatingToolbar); 1242 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1243 } 1244 } 1245 1246 private void showFloatingToolbar() { 1247 if (mTextActionMode != null) { 1248 // Delay "show" so it doesn't interfere with click confirmations 1249 // or double-clicks that could "dismiss" the floating toolbar. 1250 int delay = ViewConfiguration.getDoubleTapTimeout(); 1251 mTextView.postDelayed(mShowFloatingToolbar, delay); 1252 } 1253 } 1254 1255 public void beginBatchEdit() { 1256 mInBatchEditControllers = true; 1257 final InputMethodState ims = mInputMethodState; 1258 if (ims != null) { 1259 int nesting = ++ims.mBatchEditNesting; 1260 if (nesting == 1) { 1261 ims.mCursorChanged = false; 1262 ims.mChangedDelta = 0; 1263 if (ims.mContentChanged) { 1264 // We already have a pending change from somewhere else, 1265 // so turn this into a full update. 1266 ims.mChangedStart = 0; 1267 ims.mChangedEnd = mTextView.getText().length(); 1268 } else { 1269 ims.mChangedStart = EXTRACT_UNKNOWN; 1270 ims.mChangedEnd = EXTRACT_UNKNOWN; 1271 ims.mContentChanged = false; 1272 } 1273 mUndoInputFilter.beginBatchEdit(); 1274 mTextView.onBeginBatchEdit(); 1275 } 1276 } 1277 } 1278 1279 public void endBatchEdit() { 1280 mInBatchEditControllers = false; 1281 final InputMethodState ims = mInputMethodState; 1282 if (ims != null) { 1283 int nesting = --ims.mBatchEditNesting; 1284 if (nesting == 0) { 1285 finishBatchEdit(ims); 1286 } 1287 } 1288 } 1289 1290 void ensureEndedBatchEdit() { 1291 final InputMethodState ims = mInputMethodState; 1292 if (ims != null && ims.mBatchEditNesting != 0) { 1293 ims.mBatchEditNesting = 0; 1294 finishBatchEdit(ims); 1295 } 1296 } 1297 1298 void finishBatchEdit(final InputMethodState ims) { 1299 mTextView.onEndBatchEdit(); 1300 mUndoInputFilter.endBatchEdit(); 1301 1302 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1303 mTextView.updateAfterEdit(); 1304 reportExtractedText(); 1305 } else if (ims.mCursorChanged) { 1306 // Cheesy way to get us to report the current cursor location. 1307 mTextView.invalidateCursor(); 1308 } 1309 // sendUpdateSelection knows to avoid sending if the selection did 1310 // not actually change. 1311 sendUpdateSelection(); 1312 } 1313 1314 static final int EXTRACT_NOTHING = -2; 1315 static final int EXTRACT_UNKNOWN = -1; 1316 1317 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1318 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1319 EXTRACT_UNKNOWN, outText); 1320 } 1321 1322 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1323 int partialStartOffset, int partialEndOffset, int delta, 1324 @Nullable ExtractedText outText) { 1325 if (request == null || outText == null) { 1326 return false; 1327 } 1328 1329 final CharSequence content = mTextView.getText(); 1330 if (content == null) { 1331 return false; 1332 } 1333 1334 if (partialStartOffset != EXTRACT_NOTHING) { 1335 final int N = content.length(); 1336 if (partialStartOffset < 0) { 1337 outText.partialStartOffset = outText.partialEndOffset = -1; 1338 partialStartOffset = 0; 1339 partialEndOffset = N; 1340 } else { 1341 // Now use the delta to determine the actual amount of text 1342 // we need. 1343 partialEndOffset += delta; 1344 // Adjust offsets to ensure we contain full spans. 1345 if (content instanceof Spanned) { 1346 Spanned spanned = (Spanned)content; 1347 Object[] spans = spanned.getSpans(partialStartOffset, 1348 partialEndOffset, ParcelableSpan.class); 1349 int i = spans.length; 1350 while (i > 0) { 1351 i--; 1352 int j = spanned.getSpanStart(spans[i]); 1353 if (j < partialStartOffset) partialStartOffset = j; 1354 j = spanned.getSpanEnd(spans[i]); 1355 if (j > partialEndOffset) partialEndOffset = j; 1356 } 1357 } 1358 outText.partialStartOffset = partialStartOffset; 1359 outText.partialEndOffset = partialEndOffset - delta; 1360 1361 if (partialStartOffset > N) { 1362 partialStartOffset = N; 1363 } else if (partialStartOffset < 0) { 1364 partialStartOffset = 0; 1365 } 1366 if (partialEndOffset > N) { 1367 partialEndOffset = N; 1368 } else if (partialEndOffset < 0) { 1369 partialEndOffset = 0; 1370 } 1371 } 1372 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1373 outText.text = content.subSequence(partialStartOffset, 1374 partialEndOffset); 1375 } else { 1376 outText.text = TextUtils.substring(content, partialStartOffset, 1377 partialEndOffset); 1378 } 1379 } else { 1380 outText.partialStartOffset = 0; 1381 outText.partialEndOffset = 0; 1382 outText.text = ""; 1383 } 1384 outText.flags = 0; 1385 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1386 outText.flags |= ExtractedText.FLAG_SELECTING; 1387 } 1388 if (mTextView.isSingleLine()) { 1389 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1390 } 1391 outText.startOffset = 0; 1392 outText.selectionStart = mTextView.getSelectionStart(); 1393 outText.selectionEnd = mTextView.getSelectionEnd(); 1394 return true; 1395 } 1396 1397 boolean reportExtractedText() { 1398 final Editor.InputMethodState ims = mInputMethodState; 1399 if (ims != null) { 1400 final boolean contentChanged = ims.mContentChanged; 1401 if (contentChanged || ims.mSelectionModeChanged) { 1402 ims.mContentChanged = false; 1403 ims.mSelectionModeChanged = false; 1404 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1405 if (req != null) { 1406 InputMethodManager imm = InputMethodManager.peekInstance(); 1407 if (imm != null) { 1408 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1409 "Retrieving extracted start=" + ims.mChangedStart + 1410 " end=" + ims.mChangedEnd + 1411 " delta=" + ims.mChangedDelta); 1412 if (ims.mChangedStart < 0 && !contentChanged) { 1413 ims.mChangedStart = EXTRACT_NOTHING; 1414 } 1415 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1416 ims.mChangedDelta, ims.mExtractedText)) { 1417 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1418 "Reporting extracted start=" + 1419 ims.mExtractedText.partialStartOffset + 1420 " end=" + ims.mExtractedText.partialEndOffset + 1421 ": " + ims.mExtractedText.text); 1422 1423 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1424 ims.mChangedStart = EXTRACT_UNKNOWN; 1425 ims.mChangedEnd = EXTRACT_UNKNOWN; 1426 ims.mChangedDelta = 0; 1427 ims.mContentChanged = false; 1428 return true; 1429 } 1430 } 1431 } 1432 } 1433 } 1434 return false; 1435 } 1436 1437 private void sendUpdateSelection() { 1438 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1439 final InputMethodManager imm = InputMethodManager.peekInstance(); 1440 if (null != imm) { 1441 final int selectionStart = mTextView.getSelectionStart(); 1442 final int selectionEnd = mTextView.getSelectionEnd(); 1443 int candStart = -1; 1444 int candEnd = -1; 1445 if (mTextView.getText() instanceof Spannable) { 1446 final Spannable sp = (Spannable) mTextView.getText(); 1447 candStart = EditableInputConnection.getComposingSpanStart(sp); 1448 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1449 } 1450 // InputMethodManager#updateSelection skips sending the message if 1451 // none of the parameters have changed since the last time we called it. 1452 imm.updateSelection(mTextView, 1453 selectionStart, selectionEnd, candStart, candEnd); 1454 } 1455 } 1456 } 1457 1458 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1459 int cursorOffsetVertical) { 1460 final int selectionStart = mTextView.getSelectionStart(); 1461 final int selectionEnd = mTextView.getSelectionEnd(); 1462 1463 final InputMethodState ims = mInputMethodState; 1464 if (ims != null && ims.mBatchEditNesting == 0) { 1465 InputMethodManager imm = InputMethodManager.peekInstance(); 1466 if (imm != null) { 1467 if (imm.isActive(mTextView)) { 1468 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1469 // We are in extract mode and the content has changed 1470 // in some way... just report complete new text to the 1471 // input method. 1472 reportExtractedText(); 1473 } 1474 } 1475 } 1476 } 1477 1478 if (mCorrectionHighlighter != null) { 1479 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1480 } 1481 1482 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1483 drawCursor(canvas, cursorOffsetVertical); 1484 // Rely on the drawable entirely, do not draw the cursor line. 1485 // Has to be done after the IMM related code above which relies on the highlight. 1486 highlight = null; 1487 } 1488 1489 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1490 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1491 cursorOffsetVertical); 1492 } else { 1493 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1494 } 1495 } 1496 1497 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1498 Paint highlightPaint, int cursorOffsetVertical) { 1499 final long lineRange = layout.getLineRangeForDraw(canvas); 1500 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1501 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1502 if (lastLine < 0) return; 1503 1504 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1505 firstLine, lastLine); 1506 1507 if (layout instanceof DynamicLayout) { 1508 if (mTextRenderNodes == null) { 1509 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1510 } 1511 1512 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1513 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1514 int[] blockIndices = dynamicLayout.getBlockIndices(); 1515 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1516 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1517 1518 int endOfPreviousBlock = -1; 1519 int searchStartIndex = 0; 1520 for (int i = 0; i < numberOfBlocks; i++) { 1521 int blockEndLine = blockEndLines[i]; 1522 int blockIndex = blockIndices[i]; 1523 1524 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1525 if (blockIsInvalid) { 1526 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1527 searchStartIndex); 1528 // Note how dynamic layout's internal block indices get updated from Editor 1529 blockIndices[i] = blockIndex; 1530 if (mTextRenderNodes[blockIndex] != null) { 1531 mTextRenderNodes[blockIndex].isDirty = true; 1532 } 1533 searchStartIndex = blockIndex + 1; 1534 } 1535 1536 if (mTextRenderNodes[blockIndex] == null) { 1537 mTextRenderNodes[blockIndex] = 1538 new TextRenderNode("Text " + blockIndex); 1539 } 1540 1541 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1542 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1543 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1544 final int blockBeginLine = endOfPreviousBlock + 1; 1545 final int top = layout.getLineTop(blockBeginLine); 1546 final int bottom = layout.getLineBottom(blockEndLine); 1547 int left = 0; 1548 int right = mTextView.getWidth(); 1549 if (mTextView.getHorizontallyScrolling()) { 1550 float min = Float.MAX_VALUE; 1551 float max = Float.MIN_VALUE; 1552 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1553 min = Math.min(min, layout.getLineLeft(line)); 1554 max = Math.max(max, layout.getLineRight(line)); 1555 } 1556 left = (int) min; 1557 right = (int) (max + 0.5f); 1558 } 1559 1560 // Rebuild display list if it is invalid 1561 if (blockDisplayListIsInvalid) { 1562 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1563 right - left, bottom - top); 1564 try { 1565 // drawText is always relative to TextView's origin, this translation 1566 // brings this range of text back to the top left corner of the viewport 1567 displayListCanvas.translate(-left, -top); 1568 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1569 mTextRenderNodes[blockIndex].isDirty = false; 1570 // No need to untranslate, previous context is popped after 1571 // drawDisplayList 1572 } finally { 1573 blockDisplayList.end(displayListCanvas); 1574 // Same as drawDisplayList below, handled by our TextView's parent 1575 blockDisplayList.setClipToBounds(false); 1576 } 1577 } 1578 1579 // Valid disply list whose index is >= indexFirstChangedBlock 1580 // only needs to update its drawing location. 1581 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1582 } 1583 1584 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1585 1586 endOfPreviousBlock = blockEndLine; 1587 } 1588 1589 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1590 } else { 1591 // Boring layout is used for empty and hint text 1592 layout.drawText(canvas, firstLine, lastLine); 1593 } 1594 } 1595 1596 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1597 int searchStartIndex) { 1598 int length = mTextRenderNodes.length; 1599 for (int i = searchStartIndex; i < length; i++) { 1600 boolean blockIndexFound = false; 1601 for (int j = 0; j < numberOfBlocks; j++) { 1602 if (blockIndices[j] == i) { 1603 blockIndexFound = true; 1604 break; 1605 } 1606 } 1607 if (blockIndexFound) continue; 1608 return i; 1609 } 1610 1611 // No available index found, the pool has to grow 1612 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1613 return length; 1614 } 1615 1616 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1617 final boolean translate = cursorOffsetVertical != 0; 1618 if (translate) canvas.translate(0, cursorOffsetVertical); 1619 for (int i = 0; i < mCursorCount; i++) { 1620 mCursorDrawable[i].draw(canvas); 1621 } 1622 if (translate) canvas.translate(0, -cursorOffsetVertical); 1623 } 1624 1625 /** 1626 * Invalidates all the sub-display lists that overlap the specified character range 1627 */ 1628 void invalidateTextDisplayList(Layout layout, int start, int end) { 1629 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1630 final int firstLine = layout.getLineForOffset(start); 1631 final int lastLine = layout.getLineForOffset(end); 1632 1633 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1634 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1635 int[] blockIndices = dynamicLayout.getBlockIndices(); 1636 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1637 1638 int i = 0; 1639 // Skip the blocks before firstLine 1640 while (i < numberOfBlocks) { 1641 if (blockEndLines[i] >= firstLine) break; 1642 i++; 1643 } 1644 1645 // Invalidate all subsequent blocks until lastLine is passed 1646 while (i < numberOfBlocks) { 1647 final int blockIndex = blockIndices[i]; 1648 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1649 mTextRenderNodes[blockIndex].isDirty = true; 1650 } 1651 if (blockEndLines[i] >= lastLine) break; 1652 i++; 1653 } 1654 } 1655 } 1656 1657 void invalidateTextDisplayList() { 1658 if (mTextRenderNodes != null) { 1659 for (int i = 0; i < mTextRenderNodes.length; i++) { 1660 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1661 } 1662 } 1663 } 1664 1665 void updateCursorsPositions() { 1666 if (mTextView.mCursorDrawableRes == 0) { 1667 mCursorCount = 0; 1668 return; 1669 } 1670 1671 Layout layout = mTextView.getLayout(); 1672 Layout hintLayout = mTextView.getHintLayout(); 1673 final int offset = mTextView.getSelectionStart(); 1674 final int line = layout.getLineForOffset(offset); 1675 final int top = layout.getLineTop(line); 1676 final int bottom = layout.getLineTop(line + 1); 1677 1678 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1679 1680 int middle = bottom; 1681 if (mCursorCount == 2) { 1682 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1683 middle = (top + bottom) >> 1; 1684 } 1685 1686 boolean clamped = layout.shouldClampCursor(line); 1687 updateCursorPosition(0, top, middle, 1688 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1689 1690 if (mCursorCount == 2) { 1691 updateCursorPosition(1, middle, bottom, 1692 layout.getSecondaryHorizontal(offset, clamped)); 1693 } 1694 } 1695 1696 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1697 boolean clamped) { 1698 if (TextUtils.isEmpty(layout.getText()) && 1699 hintLayout != null && 1700 !TextUtils.isEmpty(hintLayout.getText())) { 1701 return hintLayout.getPrimaryHorizontal(offset, clamped); 1702 } else { 1703 return layout.getPrimaryHorizontal(offset, clamped); 1704 } 1705 } 1706 1707 /** 1708 * Start an Insertion action mode. 1709 */ 1710 void startInsertionActionMode() { 1711 if (mInsertionActionModeRunnable != null) { 1712 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1713 } 1714 if (extractedTextModeWillBeStarted()) { 1715 return; 1716 } 1717 stopTextActionMode(); 1718 1719 ActionMode.Callback actionModeCallback = 1720 new TextActionModeCallback(false /* hasSelection */); 1721 mTextActionMode = mTextView.startActionMode( 1722 actionModeCallback, ActionMode.TYPE_FLOATING); 1723 if (mTextActionMode != null && getInsertionController() != null) { 1724 getInsertionController().show(); 1725 } 1726 } 1727 1728 /** 1729 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1730 * are shown if there is a selection, otherwise the insertion handle is shown. This should be 1731 * used when the mode is started from a non-touch event. 1732 * 1733 * @return true if the selection mode was actually started. 1734 */ 1735 boolean startSelectionActionMode() { 1736 boolean selectionStarted = startSelectionActionModeInternal(); 1737 if (selectionStarted) { 1738 getSelectionController().show(); 1739 } else if (getInsertionController() != null) { 1740 getInsertionController().show(); 1741 } 1742 return selectionStarted; 1743 } 1744 1745 /** 1746 * If the TextView allows text selection, selects the current word when no existing selection 1747 * was available and starts a drag. 1748 * 1749 * @return true if the drag was started. 1750 */ 1751 private boolean selectCurrentWordAndStartDrag() { 1752 if (mInsertionActionModeRunnable != null) { 1753 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1754 } 1755 if (extractedTextModeWillBeStarted()) { 1756 return false; 1757 } 1758 if (mTextActionMode != null) { 1759 mTextActionMode.finish(); 1760 } 1761 if (!checkFieldAndSelectCurrentWord()) { 1762 return false; 1763 } 1764 1765 // Avoid dismissing the selection if it exists. 1766 mPreserveDetachedSelection = true; 1767 stopTextActionMode(); 1768 mPreserveDetachedSelection = false; 1769 1770 getSelectionController().enterDrag(); 1771 return true; 1772 } 1773 1774 /** 1775 * Checks whether a selection can be performed on the current TextView and if so selects 1776 * the current word. 1777 * 1778 * @return true if there already was a selection or if the current word was selected. 1779 */ 1780 private boolean checkFieldAndSelectCurrentWord() { 1781 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1782 Log.w(TextView.LOG_TAG, 1783 "TextView does not support text selection. Selection cancelled."); 1784 return false; 1785 } 1786 1787 if (!mTextView.hasSelection()) { 1788 // There may already be a selection on device rotation 1789 return selectCurrentWord(); 1790 } 1791 return true; 1792 } 1793 1794 private boolean startSelectionActionModeInternal() { 1795 if (mTextActionMode != null) { 1796 // Text action mode is already started 1797 mTextActionMode.invalidate(); 1798 return false; 1799 } 1800 1801 if (!checkFieldAndSelectCurrentWord()) { 1802 return false; 1803 } 1804 1805 boolean willExtract = extractedTextModeWillBeStarted(); 1806 1807 // Do not start the action mode when extracted text will show up full screen, which would 1808 // immediately hide the newly created action bar and would be visually distracting. 1809 if (!willExtract) { 1810 ActionMode.Callback actionModeCallback = 1811 new TextActionModeCallback(true /* hasSelection */); 1812 mTextActionMode = mTextView.startActionMode( 1813 actionModeCallback, ActionMode.TYPE_FLOATING); 1814 } 1815 1816 final boolean selectionStarted = mTextActionMode != null || willExtract; 1817 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1818 // Show the IME to be able to replace text, except when selecting non editable text. 1819 final InputMethodManager imm = InputMethodManager.peekInstance(); 1820 if (imm != null) { 1821 imm.showSoftInput(mTextView, 0, null); 1822 } 1823 } 1824 return selectionStarted; 1825 } 1826 1827 private boolean extractedTextModeWillBeStarted() { 1828 if (!(mTextView.isInExtractedMode())) { 1829 final InputMethodManager imm = InputMethodManager.peekInstance(); 1830 return imm != null && imm.isFullscreenMode(); 1831 } 1832 return false; 1833 } 1834 1835 /** 1836 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1837 * the current cursor position or selection range. This method is consistent with the 1838 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1839 */ 1840 private boolean shouldOfferToShowSuggestions() { 1841 CharSequence text = mTextView.getText(); 1842 if (!(text instanceof Spannable)) return false; 1843 1844 final Spannable spannable = (Spannable) text; 1845 final int selectionStart = mTextView.getSelectionStart(); 1846 final int selectionEnd = mTextView.getSelectionEnd(); 1847 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1848 SuggestionSpan.class); 1849 if (suggestionSpans.length == 0) { 1850 return false; 1851 } 1852 if (selectionStart == selectionEnd) { 1853 // Spans overlap the cursor. 1854 for (int i = 0; i < suggestionSpans.length; i++) { 1855 if (suggestionSpans[i].getSuggestions().length > 0) { 1856 return true; 1857 } 1858 } 1859 return false; 1860 } 1861 int minSpanStart = mTextView.getText().length(); 1862 int maxSpanEnd = 0; 1863 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1864 int unionOfSpansCoveringSelectionStartEnd = 0; 1865 boolean hasValidSuggestions = false; 1866 for (int i = 0; i < suggestionSpans.length; i++) { 1867 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1868 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1869 minSpanStart = Math.min(minSpanStart, spanStart); 1870 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1871 if (selectionStart < spanStart || selectionStart > spanEnd) { 1872 // The span doesn't cover the current selection start point. 1873 continue; 1874 } 1875 hasValidSuggestions = 1876 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 1877 unionOfSpansCoveringSelectionStartStart = 1878 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1879 unionOfSpansCoveringSelectionStartEnd = 1880 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1881 } 1882 if (!hasValidSuggestions) { 1883 return false; 1884 } 1885 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1886 // No spans cover the selection start point. 1887 return false; 1888 } 1889 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1890 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1891 // There is a span that is not covered by the union. In this case, we soouldn't offer 1892 // to show suggestions as it's confusing. 1893 return false; 1894 } 1895 return true; 1896 } 1897 1898 /** 1899 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1900 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1901 */ 1902 private boolean isCursorInsideEasyCorrectionSpan() { 1903 Spannable spannable = (Spannable) mTextView.getText(); 1904 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1905 mTextView.getSelectionEnd(), SuggestionSpan.class); 1906 for (int i = 0; i < suggestionSpans.length; i++) { 1907 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1908 return true; 1909 } 1910 } 1911 return false; 1912 } 1913 1914 void onTouchUpEvent(MotionEvent event) { 1915 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1916 hideControllers(); 1917 stopTextActionMode(); 1918 CharSequence text = mTextView.getText(); 1919 if (!selectAllGotFocus && text.length() > 0) { 1920 // Move cursor 1921 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1922 Selection.setSelection((Spannable) text, offset); 1923 if (mSpellChecker != null) { 1924 // When the cursor moves, the word that was typed may need spell check 1925 mSpellChecker.onSelectionChanged(); 1926 } 1927 1928 if (!extractedTextModeWillBeStarted()) { 1929 if (isCursorInsideEasyCorrectionSpan()) { 1930 // Cancel the single tap delayed runnable. 1931 if (mInsertionActionModeRunnable != null) { 1932 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1933 } 1934 1935 mShowSuggestionRunnable = new Runnable() { 1936 public void run() { 1937 showSuggestions(); 1938 } 1939 }; 1940 // removeCallbacks is performed on every touch 1941 mTextView.postDelayed(mShowSuggestionRunnable, 1942 ViewConfiguration.getDoubleTapTimeout()); 1943 } else if (hasInsertionController()) { 1944 getInsertionController().show(); 1945 } 1946 } 1947 } 1948 } 1949 1950 protected void stopTextActionMode() { 1951 if (mTextActionMode != null) { 1952 // This will hide the mSelectionModifierCursorController 1953 mTextActionMode.finish(); 1954 } 1955 } 1956 1957 /** 1958 * @return True if this view supports insertion handles. 1959 */ 1960 boolean hasInsertionController() { 1961 return mInsertionControllerEnabled; 1962 } 1963 1964 /** 1965 * @return True if this view supports selection handles. 1966 */ 1967 boolean hasSelectionController() { 1968 return mSelectionControllerEnabled; 1969 } 1970 1971 InsertionPointCursorController getInsertionController() { 1972 if (!mInsertionControllerEnabled) { 1973 return null; 1974 } 1975 1976 if (mInsertionPointCursorController == null) { 1977 mInsertionPointCursorController = new InsertionPointCursorController(); 1978 1979 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1980 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1981 } 1982 1983 return mInsertionPointCursorController; 1984 } 1985 1986 SelectionModifierCursorController getSelectionController() { 1987 if (!mSelectionControllerEnabled) { 1988 return null; 1989 } 1990 1991 if (mSelectionModifierCursorController == null) { 1992 mSelectionModifierCursorController = new SelectionModifierCursorController(); 1993 1994 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1995 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 1996 } 1997 1998 return mSelectionModifierCursorController; 1999 } 2000 2001 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2002 if (mCursorDrawable[cursorIndex] == null) 2003 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2004 mTextView.mCursorDrawableRes); 2005 2006 if (mTempRect == null) mTempRect = new Rect(); 2007 mCursorDrawable[cursorIndex].getPadding(mTempRect); 2008 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 2009 horizontal = Math.max(0.5f, horizontal - 0.5f); 2010 final int left = (int) (horizontal) - mTempRect.left; 2011 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 2012 bottom + mTempRect.bottom); 2013 } 2014 2015 /** 2016 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2017 * a dictionary) from the current input method, provided by it calling 2018 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2019 * implementation flashes the background of the corrected word to provide feedback to the user. 2020 * 2021 * @param info The auto correct info about the text that was corrected. 2022 */ 2023 public void onCommitCorrection(CorrectionInfo info) { 2024 if (mCorrectionHighlighter == null) { 2025 mCorrectionHighlighter = new CorrectionHighlighter(); 2026 } else { 2027 mCorrectionHighlighter.invalidate(false); 2028 } 2029 2030 mCorrectionHighlighter.highlight(info); 2031 } 2032 2033 void showSuggestions() { 2034 if (mSuggestionsPopupWindow == null) { 2035 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 2036 } 2037 hideControllers(); 2038 stopTextActionMode(); 2039 mSuggestionsPopupWindow.show(); 2040 } 2041 2042 void onScrollChanged() { 2043 if (mPositionListener != null) { 2044 mPositionListener.onScrollChanged(); 2045 } 2046 if (mTextActionMode != null) { 2047 mTextActionMode.invalidateContentRect(); 2048 } 2049 } 2050 2051 /** 2052 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2053 */ 2054 private boolean shouldBlink() { 2055 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2056 2057 final int start = mTextView.getSelectionStart(); 2058 if (start < 0) return false; 2059 2060 final int end = mTextView.getSelectionEnd(); 2061 if (end < 0) return false; 2062 2063 return start == end; 2064 } 2065 2066 void makeBlink() { 2067 if (shouldBlink()) { 2068 mShowCursor = SystemClock.uptimeMillis(); 2069 if (mBlink == null) mBlink = new Blink(); 2070 mBlink.removeCallbacks(mBlink); 2071 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 2072 } else { 2073 if (mBlink != null) mBlink.removeCallbacks(mBlink); 2074 } 2075 } 2076 2077 private class Blink extends Handler implements Runnable { 2078 private boolean mCancelled; 2079 2080 public void run() { 2081 if (mCancelled) { 2082 return; 2083 } 2084 2085 removeCallbacks(Blink.this); 2086 2087 if (shouldBlink()) { 2088 if (mTextView.getLayout() != null) { 2089 mTextView.invalidateCursorPath(); 2090 } 2091 2092 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 2093 } 2094 } 2095 2096 void cancel() { 2097 if (!mCancelled) { 2098 removeCallbacks(Blink.this); 2099 mCancelled = true; 2100 } 2101 } 2102 2103 void uncancel() { 2104 mCancelled = false; 2105 } 2106 } 2107 2108 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 2109 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2110 com.android.internal.R.layout.text_drag_thumbnail, null); 2111 2112 if (shadowView == null) { 2113 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2114 } 2115 2116 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2117 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2118 } 2119 shadowView.setText(text); 2120 shadowView.setTextColor(mTextView.getTextColors()); 2121 2122 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2123 shadowView.setGravity(Gravity.CENTER); 2124 2125 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2126 ViewGroup.LayoutParams.WRAP_CONTENT)); 2127 2128 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2129 shadowView.measure(size, size); 2130 2131 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2132 shadowView.invalidate(); 2133 return new DragShadowBuilder(shadowView); 2134 } 2135 2136 private static class DragLocalState { 2137 public TextView sourceTextView; 2138 public int start, end; 2139 2140 public DragLocalState(TextView sourceTextView, int start, int end) { 2141 this.sourceTextView = sourceTextView; 2142 this.start = start; 2143 this.end = end; 2144 } 2145 } 2146 2147 void onDrop(DragEvent event) { 2148 StringBuilder content = new StringBuilder(""); 2149 ClipData clipData = event.getClipData(); 2150 final int itemCount = clipData.getItemCount(); 2151 for (int i=0; i < itemCount; i++) { 2152 Item item = clipData.getItemAt(i); 2153 content.append(item.coerceToStyledText(mTextView.getContext())); 2154 } 2155 2156 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2157 2158 Object localState = event.getLocalState(); 2159 DragLocalState dragLocalState = null; 2160 if (localState instanceof DragLocalState) { 2161 dragLocalState = (DragLocalState) localState; 2162 } 2163 boolean dragDropIntoItself = dragLocalState != null && 2164 dragLocalState.sourceTextView == mTextView; 2165 2166 if (dragDropIntoItself) { 2167 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2168 // A drop inside the original selection discards the drop. 2169 return; 2170 } 2171 } 2172 2173 final int originalLength = mTextView.getText().length(); 2174 int min = offset; 2175 int max = offset; 2176 2177 Selection.setSelection((Spannable) mTextView.getText(), max); 2178 mTextView.replaceText_internal(min, max, content); 2179 2180 if (dragDropIntoItself) { 2181 int dragSourceStart = dragLocalState.start; 2182 int dragSourceEnd = dragLocalState.end; 2183 if (max <= dragSourceStart) { 2184 // Inserting text before selection has shifted positions 2185 final int shift = mTextView.getText().length() - originalLength; 2186 dragSourceStart += shift; 2187 dragSourceEnd += shift; 2188 } 2189 2190 // Delete original selection 2191 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2192 2193 // Make sure we do not leave two adjacent spaces. 2194 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2195 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2196 if (nextCharIdx > prevCharIdx + 1) { 2197 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2198 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2199 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2200 } 2201 } 2202 } 2203 } 2204 2205 public void addSpanWatchers(Spannable text) { 2206 final int textLength = text.length(); 2207 2208 if (mKeyListener != null) { 2209 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2210 } 2211 2212 if (mSpanController == null) { 2213 mSpanController = new SpanController(); 2214 } 2215 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2216 } 2217 2218 /** 2219 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2220 * pop-up should be displayed. 2221 * Also monitors {@link Selection} to call back to the attached input method. 2222 */ 2223 class SpanController implements SpanWatcher { 2224 2225 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2226 2227 private EasyEditPopupWindow mPopupWindow; 2228 2229 private Runnable mHidePopup; 2230 2231 // This function is pure but inner classes can't have static functions 2232 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2233 final Object span) { 2234 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2235 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2236 } 2237 2238 @Override 2239 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2240 if (isNonIntermediateSelectionSpan(text, span)) { 2241 sendUpdateSelection(); 2242 } else if (span instanceof EasyEditSpan) { 2243 if (mPopupWindow == null) { 2244 mPopupWindow = new EasyEditPopupWindow(); 2245 mHidePopup = new Runnable() { 2246 @Override 2247 public void run() { 2248 hide(); 2249 } 2250 }; 2251 } 2252 2253 // Make sure there is only at most one EasyEditSpan in the text 2254 if (mPopupWindow.mEasyEditSpan != null) { 2255 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2256 } 2257 2258 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2259 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2260 @Override 2261 public void onDeleteClick(EasyEditSpan span) { 2262 Editable editable = (Editable) mTextView.getText(); 2263 int start = editable.getSpanStart(span); 2264 int end = editable.getSpanEnd(span); 2265 if (start >= 0 && end >= 0) { 2266 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2267 mTextView.deleteText_internal(start, end); 2268 } 2269 editable.removeSpan(span); 2270 } 2271 }); 2272 2273 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2274 // The window is not visible yet, ignore the text change. 2275 return; 2276 } 2277 2278 if (mTextView.getLayout() == null) { 2279 // The view has not been laid out yet, ignore the text change 2280 return; 2281 } 2282 2283 if (extractedTextModeWillBeStarted()) { 2284 // The input is in extract mode. Do not handle the easy edit in 2285 // the original TextView, as the ExtractEditText will do 2286 return; 2287 } 2288 2289 mPopupWindow.show(); 2290 mTextView.removeCallbacks(mHidePopup); 2291 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2292 } 2293 } 2294 2295 @Override 2296 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2297 if (isNonIntermediateSelectionSpan(text, span)) { 2298 sendUpdateSelection(); 2299 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2300 hide(); 2301 } 2302 } 2303 2304 @Override 2305 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2306 int newStart, int newEnd) { 2307 if (isNonIntermediateSelectionSpan(text, span)) { 2308 sendUpdateSelection(); 2309 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2310 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2311 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2312 text.removeSpan(easyEditSpan); 2313 } 2314 } 2315 2316 public void hide() { 2317 if (mPopupWindow != null) { 2318 mPopupWindow.hide(); 2319 mTextView.removeCallbacks(mHidePopup); 2320 } 2321 } 2322 2323 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2324 try { 2325 PendingIntent pendingIntent = span.getPendingIntent(); 2326 if (pendingIntent != null) { 2327 Intent intent = new Intent(); 2328 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2329 pendingIntent.send(mTextView.getContext(), 0, intent); 2330 } 2331 } catch (CanceledException e) { 2332 // This should not happen, as we should try to send the intent only once. 2333 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2334 } 2335 } 2336 } 2337 2338 /** 2339 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2340 */ 2341 private interface EasyEditDeleteListener { 2342 2343 /** 2344 * Clicks the delete pop-up. 2345 */ 2346 void onDeleteClick(EasyEditSpan span); 2347 } 2348 2349 /** 2350 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2351 * by {@link SpanController}. 2352 */ 2353 private class EasyEditPopupWindow extends PinnedPopupWindow 2354 implements OnClickListener { 2355 private static final int POPUP_TEXT_LAYOUT = 2356 com.android.internal.R.layout.text_edit_action_popup_text; 2357 private TextView mDeleteTextView; 2358 private EasyEditSpan mEasyEditSpan; 2359 private EasyEditDeleteListener mOnDeleteListener; 2360 2361 @Override 2362 protected void createPopupWindow() { 2363 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2364 com.android.internal.R.attr.textSelectHandleWindowStyle); 2365 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2366 mPopupWindow.setClippingEnabled(true); 2367 } 2368 2369 @Override 2370 protected void initContentView() { 2371 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2372 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2373 mContentView = linearLayout; 2374 mContentView.setBackgroundResource( 2375 com.android.internal.R.drawable.text_edit_side_paste_window); 2376 2377 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2378 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2379 2380 LayoutParams wrapContent = new LayoutParams( 2381 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2382 2383 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2384 mDeleteTextView.setLayoutParams(wrapContent); 2385 mDeleteTextView.setText(com.android.internal.R.string.delete); 2386 mDeleteTextView.setOnClickListener(this); 2387 mContentView.addView(mDeleteTextView); 2388 } 2389 2390 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2391 mEasyEditSpan = easyEditSpan; 2392 } 2393 2394 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2395 mOnDeleteListener = listener; 2396 } 2397 2398 @Override 2399 public void onClick(View view) { 2400 if (view == mDeleteTextView 2401 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2402 && mOnDeleteListener != null) { 2403 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2404 } 2405 } 2406 2407 @Override 2408 public void hide() { 2409 if (mEasyEditSpan != null) { 2410 mEasyEditSpan.setDeleteEnabled(false); 2411 } 2412 mOnDeleteListener = null; 2413 super.hide(); 2414 } 2415 2416 @Override 2417 protected int getTextOffset() { 2418 // Place the pop-up at the end of the span 2419 Editable editable = (Editable) mTextView.getText(); 2420 return editable.getSpanEnd(mEasyEditSpan); 2421 } 2422 2423 @Override 2424 protected int getVerticalLocalPosition(int line) { 2425 return mTextView.getLayout().getLineBottom(line); 2426 } 2427 2428 @Override 2429 protected int clipVertically(int positionY) { 2430 // As we display the pop-up below the span, no vertical clipping is required. 2431 return positionY; 2432 } 2433 } 2434 2435 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2436 // 3 handles 2437 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2438 // 1 CursorAnchorInfoNotifier 2439 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2440 private TextViewPositionListener[] mPositionListeners = 2441 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2442 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2443 private boolean mPositionHasChanged = true; 2444 // Absolute position of the TextView with respect to its parent window 2445 private int mPositionX, mPositionY; 2446 private int mNumberOfListeners; 2447 private boolean mScrollHasChanged; 2448 final int[] mTempCoords = new int[2]; 2449 2450 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2451 if (mNumberOfListeners == 0) { 2452 updatePosition(); 2453 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2454 vto.addOnPreDrawListener(this); 2455 } 2456 2457 int emptySlotIndex = -1; 2458 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2459 TextViewPositionListener listener = mPositionListeners[i]; 2460 if (listener == positionListener) { 2461 return; 2462 } else if (emptySlotIndex < 0 && listener == null) { 2463 emptySlotIndex = i; 2464 } 2465 } 2466 2467 mPositionListeners[emptySlotIndex] = positionListener; 2468 mCanMove[emptySlotIndex] = canMove; 2469 mNumberOfListeners++; 2470 } 2471 2472 public void removeSubscriber(TextViewPositionListener positionListener) { 2473 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2474 if (mPositionListeners[i] == positionListener) { 2475 mPositionListeners[i] = null; 2476 mNumberOfListeners--; 2477 break; 2478 } 2479 } 2480 2481 if (mNumberOfListeners == 0) { 2482 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2483 vto.removeOnPreDrawListener(this); 2484 } 2485 } 2486 2487 public int getPositionX() { 2488 return mPositionX; 2489 } 2490 2491 public int getPositionY() { 2492 return mPositionY; 2493 } 2494 2495 @Override 2496 public boolean onPreDraw() { 2497 updatePosition(); 2498 2499 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2500 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2501 TextViewPositionListener positionListener = mPositionListeners[i]; 2502 if (positionListener != null) { 2503 positionListener.updatePosition(mPositionX, mPositionY, 2504 mPositionHasChanged, mScrollHasChanged); 2505 } 2506 } 2507 } 2508 2509 mScrollHasChanged = false; 2510 return true; 2511 } 2512 2513 private void updatePosition() { 2514 mTextView.getLocationInWindow(mTempCoords); 2515 2516 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2517 2518 mPositionX = mTempCoords[0]; 2519 mPositionY = mTempCoords[1]; 2520 } 2521 2522 public void onScrollChanged() { 2523 mScrollHasChanged = true; 2524 } 2525 } 2526 2527 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2528 protected PopupWindow mPopupWindow; 2529 protected ViewGroup mContentView; 2530 int mPositionX, mPositionY; 2531 2532 protected abstract void createPopupWindow(); 2533 protected abstract void initContentView(); 2534 protected abstract int getTextOffset(); 2535 protected abstract int getVerticalLocalPosition(int line); 2536 protected abstract int clipVertically(int positionY); 2537 2538 public PinnedPopupWindow() { 2539 createPopupWindow(); 2540 2541 mPopupWindow.setWindowLayoutType( 2542 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2543 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2544 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2545 2546 initContentView(); 2547 2548 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2549 ViewGroup.LayoutParams.WRAP_CONTENT); 2550 mContentView.setLayoutParams(wrapContent); 2551 2552 mPopupWindow.setContentView(mContentView); 2553 } 2554 2555 public void show() { 2556 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2557 2558 computeLocalPosition(); 2559 2560 final PositionListener positionListener = getPositionListener(); 2561 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2562 } 2563 2564 protected void measureContent() { 2565 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2566 mContentView.measure( 2567 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2568 View.MeasureSpec.AT_MOST), 2569 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2570 View.MeasureSpec.AT_MOST)); 2571 } 2572 2573 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2574 * positioned according to viewportToContentHorizontalOffset. 2575 * 2576 * This method assumes that mContentView has properly been measured from its content. */ 2577 private void computeLocalPosition() { 2578 measureContent(); 2579 final int width = mContentView.getMeasuredWidth(); 2580 final int offset = getTextOffset(); 2581 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2582 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2583 2584 final int line = mTextView.getLayout().getLineForOffset(offset); 2585 mPositionY = getVerticalLocalPosition(line); 2586 mPositionY += mTextView.viewportToContentVerticalOffset(); 2587 } 2588 2589 private void updatePosition(int parentPositionX, int parentPositionY) { 2590 int positionX = parentPositionX + mPositionX; 2591 int positionY = parentPositionY + mPositionY; 2592 2593 positionY = clipVertically(positionY); 2594 2595 // Horizontal clipping 2596 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2597 final int width = mContentView.getMeasuredWidth(); 2598 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2599 positionX = Math.max(0, positionX); 2600 2601 if (isShowing()) { 2602 mPopupWindow.update(positionX, positionY, -1, -1); 2603 } else { 2604 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2605 positionX, positionY); 2606 } 2607 } 2608 2609 public void hide() { 2610 mPopupWindow.dismiss(); 2611 getPositionListener().removeSubscriber(this); 2612 } 2613 2614 @Override 2615 public void updatePosition(int parentPositionX, int parentPositionY, 2616 boolean parentPositionChanged, boolean parentScrolled) { 2617 // Either parentPositionChanged or parentScrolled is true, check if still visible 2618 if (isShowing() && isOffsetVisible(getTextOffset())) { 2619 if (parentScrolled) computeLocalPosition(); 2620 updatePosition(parentPositionX, parentPositionY); 2621 } else { 2622 hide(); 2623 } 2624 } 2625 2626 public boolean isShowing() { 2627 return mPopupWindow.isShowing(); 2628 } 2629 } 2630 2631 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2632 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2633 private static final int ADD_TO_DICTIONARY = -1; 2634 private static final int DELETE_TEXT = -2; 2635 private SuggestionInfo[] mSuggestionInfos; 2636 private int mNumberOfSuggestions; 2637 private boolean mCursorWasVisibleBeforeSuggestions; 2638 private boolean mIsShowingUp = false; 2639 private SuggestionAdapter mSuggestionsAdapter; 2640 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2641 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2642 2643 private class CustomPopupWindow extends PopupWindow { 2644 public CustomPopupWindow(Context context, int defStyleAttr) { 2645 super(context, null, defStyleAttr); 2646 } 2647 2648 @Override 2649 public void dismiss() { 2650 super.dismiss(); 2651 2652 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2653 2654 // Safe cast since show() checks that mTextView.getText() is an Editable 2655 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2656 2657 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2658 if (hasInsertionController()) { 2659 getInsertionController().show(); 2660 } 2661 } 2662 } 2663 2664 public SuggestionsPopupWindow() { 2665 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2666 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2667 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2668 } 2669 2670 @Override 2671 protected void createPopupWindow() { 2672 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2673 com.android.internal.R.attr.textSuggestionsWindowStyle); 2674 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2675 mPopupWindow.setFocusable(true); 2676 mPopupWindow.setClippingEnabled(false); 2677 } 2678 2679 @Override 2680 protected void initContentView() { 2681 ListView listView = new ListView(mTextView.getContext()); 2682 mSuggestionsAdapter = new SuggestionAdapter(); 2683 listView.setAdapter(mSuggestionsAdapter); 2684 listView.setOnItemClickListener(this); 2685 mContentView = listView; 2686 2687 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2688 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2689 for (int i = 0; i < mSuggestionInfos.length; i++) { 2690 mSuggestionInfos[i] = new SuggestionInfo(); 2691 } 2692 } 2693 2694 public boolean isShowingUp() { 2695 return mIsShowingUp; 2696 } 2697 2698 public void onParentLostFocus() { 2699 mIsShowingUp = false; 2700 } 2701 2702 private class SuggestionInfo { 2703 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2704 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2705 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2706 SpannableStringBuilder text = new SpannableStringBuilder(); 2707 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2708 android.R.style.TextAppearance_SuggestionHighlight); 2709 } 2710 2711 private class SuggestionAdapter extends BaseAdapter { 2712 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2713 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2714 2715 @Override 2716 public int getCount() { 2717 return mNumberOfSuggestions; 2718 } 2719 2720 @Override 2721 public Object getItem(int position) { 2722 return mSuggestionInfos[position]; 2723 } 2724 2725 @Override 2726 public long getItemId(int position) { 2727 return position; 2728 } 2729 2730 @Override 2731 public View getView(int position, View convertView, ViewGroup parent) { 2732 TextView textView = (TextView) convertView; 2733 2734 if (textView == null) { 2735 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2736 parent, false); 2737 } 2738 2739 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2740 textView.setText(suggestionInfo.text); 2741 2742 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2743 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2744 textView.setBackgroundColor(Color.TRANSPARENT); 2745 } else { 2746 textView.setBackgroundColor(Color.WHITE); 2747 } 2748 2749 return textView; 2750 } 2751 } 2752 2753 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2754 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2755 final int flag1 = span1.getFlags(); 2756 final int flag2 = span2.getFlags(); 2757 if (flag1 != flag2) { 2758 // The order here should match what is used in updateDrawState 2759 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2760 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2761 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2762 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2763 if (easy1 && !misspelled1) return -1; 2764 if (easy2 && !misspelled2) return 1; 2765 if (misspelled1) return -1; 2766 if (misspelled2) return 1; 2767 } 2768 2769 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2770 } 2771 } 2772 2773 /** 2774 * Returns the suggestion spans that cover the current cursor position. The suggestion 2775 * spans are sorted according to the length of text that they are attached to. 2776 */ 2777 private SuggestionSpan[] getSuggestionSpans() { 2778 int pos = mTextView.getSelectionStart(); 2779 Spannable spannable = (Spannable) mTextView.getText(); 2780 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2781 2782 mSpansLengths.clear(); 2783 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2784 int start = spannable.getSpanStart(suggestionSpan); 2785 int end = spannable.getSpanEnd(suggestionSpan); 2786 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2787 } 2788 2789 // The suggestions are sorted according to their types (easy correction first, then 2790 // misspelled) and to the length of the text that they cover (shorter first). 2791 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2792 return suggestionSpans; 2793 } 2794 2795 @Override 2796 public void show() { 2797 if (!(mTextView.getText() instanceof Editable)) return; 2798 2799 if (updateSuggestions()) { 2800 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2801 mTextView.setCursorVisible(false); 2802 mIsShowingUp = true; 2803 super.show(); 2804 } 2805 } 2806 2807 @Override 2808 protected void measureContent() { 2809 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2810 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2811 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2812 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2813 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2814 2815 int width = 0; 2816 View view = null; 2817 for (int i = 0; i < mNumberOfSuggestions; i++) { 2818 view = mSuggestionsAdapter.getView(i, view, mContentView); 2819 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2820 view.measure(horizontalMeasure, verticalMeasure); 2821 width = Math.max(width, view.getMeasuredWidth()); 2822 } 2823 2824 // Enforce the width based on actual text widths 2825 mContentView.measure( 2826 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2827 verticalMeasure); 2828 2829 Drawable popupBackground = mPopupWindow.getBackground(); 2830 if (popupBackground != null) { 2831 if (mTempRect == null) mTempRect = new Rect(); 2832 popupBackground.getPadding(mTempRect); 2833 width += mTempRect.left + mTempRect.right; 2834 } 2835 mPopupWindow.setWidth(width); 2836 } 2837 2838 @Override 2839 protected int getTextOffset() { 2840 return mTextView.getSelectionStart(); 2841 } 2842 2843 @Override 2844 protected int getVerticalLocalPosition(int line) { 2845 return mTextView.getLayout().getLineBottom(line); 2846 } 2847 2848 @Override 2849 protected int clipVertically(int positionY) { 2850 final int height = mContentView.getMeasuredHeight(); 2851 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2852 return Math.min(positionY, displayMetrics.heightPixels - height); 2853 } 2854 2855 @Override 2856 public void hide() { 2857 super.hide(); 2858 } 2859 2860 private boolean updateSuggestions() { 2861 Spannable spannable = (Spannable) mTextView.getText(); 2862 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2863 2864 final int nbSpans = suggestionSpans.length; 2865 // Suggestions are shown after a delay: the underlying spans may have been removed 2866 if (nbSpans == 0) return false; 2867 2868 mNumberOfSuggestions = 0; 2869 int spanUnionStart = mTextView.getText().length(); 2870 int spanUnionEnd = 0; 2871 2872 SuggestionSpan misspelledSpan = null; 2873 int underlineColor = 0; 2874 2875 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2876 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2877 final int spanStart = spannable.getSpanStart(suggestionSpan); 2878 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2879 spanUnionStart = Math.min(spanStart, spanUnionStart); 2880 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2881 2882 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2883 misspelledSpan = suggestionSpan; 2884 } 2885 2886 // The first span dictates the background color of the highlighted text 2887 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2888 2889 String[] suggestions = suggestionSpan.getSuggestions(); 2890 int nbSuggestions = suggestions.length; 2891 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2892 String suggestion = suggestions[suggestionIndex]; 2893 2894 boolean suggestionIsDuplicate = false; 2895 for (int i = 0; i < mNumberOfSuggestions; i++) { 2896 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2897 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2898 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2899 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2900 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2901 suggestionIsDuplicate = true; 2902 break; 2903 } 2904 } 2905 } 2906 2907 if (!suggestionIsDuplicate) { 2908 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2909 suggestionInfo.suggestionSpan = suggestionSpan; 2910 suggestionInfo.suggestionIndex = suggestionIndex; 2911 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2912 2913 mNumberOfSuggestions++; 2914 2915 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2916 // Also end outer for loop 2917 spanIndex = nbSpans; 2918 break; 2919 } 2920 } 2921 } 2922 } 2923 2924 for (int i = 0; i < mNumberOfSuggestions; i++) { 2925 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2926 } 2927 2928 // Add "Add to dictionary" item if there is a span with the misspelled flag 2929 if (misspelledSpan != null) { 2930 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2931 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2932 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2933 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2934 suggestionInfo.suggestionSpan = misspelledSpan; 2935 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2936 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2937 getContext().getString(com.android.internal.R.string.addToDictionary)); 2938 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2939 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2940 2941 mNumberOfSuggestions++; 2942 } 2943 } 2944 2945 // Delete item 2946 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2947 suggestionInfo.suggestionSpan = null; 2948 suggestionInfo.suggestionIndex = DELETE_TEXT; 2949 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2950 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2951 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2952 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2953 mNumberOfSuggestions++; 2954 2955 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2956 if (underlineColor == 0) { 2957 // Fallback on the default highlight color when the first span does not provide one 2958 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2959 } else { 2960 final float BACKGROUND_TRANSPARENCY = 0.4f; 2961 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2962 mSuggestionRangeSpan.setBackgroundColor( 2963 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2964 } 2965 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2966 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2967 2968 mSuggestionsAdapter.notifyDataSetChanged(); 2969 return true; 2970 } 2971 2972 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2973 int unionEnd) { 2974 final Spannable text = (Spannable) mTextView.getText(); 2975 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2976 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2977 2978 // Adjust the start/end of the suggestion span 2979 suggestionInfo.suggestionStart = spanStart - unionStart; 2980 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2981 + suggestionInfo.text.length(); 2982 2983 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2984 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2985 2986 // Add the text before and after the span. 2987 final String textAsString = text.toString(); 2988 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2989 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 2990 } 2991 2992 @Override 2993 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 2994 Editable editable = (Editable) mTextView.getText(); 2995 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2996 2997 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 2998 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 2999 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3000 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3001 // Do not leave two adjacent spaces after deletion, or one at beginning of text 3002 if (spanUnionEnd < editable.length() && 3003 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 3004 (spanUnionStart == 0 || 3005 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 3006 spanUnionEnd = spanUnionEnd + 1; 3007 } 3008 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3009 } 3010 hide(); 3011 return; 3012 } 3013 3014 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 3015 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 3016 if (spanStart < 0 || spanEnd <= spanStart) { 3017 // Span has been removed 3018 hide(); 3019 return; 3020 } 3021 3022 final String originalText = editable.toString().substring(spanStart, spanEnd); 3023 3024 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 3025 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3026 intent.putExtra("word", originalText); 3027 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 3028 // Put a listener to replace the original text with a word which the user 3029 // modified in a user dictionary dialog. 3030 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3031 mTextView.getContext().startActivity(intent); 3032 // There is no way to know if the word was indeed added. Re-check. 3033 // TODO The ExtractEditText should remove the span in the original text instead 3034 editable.removeSpan(suggestionInfo.suggestionSpan); 3035 Selection.setSelection(editable, spanEnd); 3036 updateSpellCheckSpans(spanStart, spanEnd, false); 3037 } else { 3038 // SuggestionSpans are removed by replace: save them before 3039 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 3040 SuggestionSpan.class); 3041 final int length = suggestionSpans.length; 3042 int[] suggestionSpansStarts = new int[length]; 3043 int[] suggestionSpansEnds = new int[length]; 3044 int[] suggestionSpansFlags = new int[length]; 3045 for (int i = 0; i < length; i++) { 3046 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 3047 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 3048 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 3049 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 3050 3051 // Remove potential misspelled flags 3052 int suggestionSpanFlags = suggestionSpan.getFlags(); 3053 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 3054 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 3055 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 3056 suggestionSpan.setFlags(suggestionSpanFlags); 3057 } 3058 } 3059 3060 final int suggestionStart = suggestionInfo.suggestionStart; 3061 final int suggestionEnd = suggestionInfo.suggestionEnd; 3062 final String suggestion = suggestionInfo.text.subSequence( 3063 suggestionStart, suggestionEnd).toString(); 3064 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 3065 3066 // Notify source IME of the suggestion pick. Do this before 3067 // swaping texts. 3068 suggestionInfo.suggestionSpan.notifySelection( 3069 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 3070 3071 // Swap text content between actual text and Suggestion span 3072 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 3073 suggestions[suggestionInfo.suggestionIndex] = originalText; 3074 3075 // Restore previous SuggestionSpans 3076 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 3077 for (int i = 0; i < length; i++) { 3078 // Only spans that include the modified region make sense after replacement 3079 // Spans partially included in the replaced region are removed, there is no 3080 // way to assign them a valid range after replacement 3081 if (suggestionSpansStarts[i] <= spanStart && 3082 suggestionSpansEnds[i] >= spanEnd) { 3083 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 3084 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 3085 } 3086 } 3087 3088 // Move cursor at the end of the replaced word 3089 final int newCursorPosition = spanEnd + lengthDifference; 3090 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 3091 } 3092 3093 hide(); 3094 } 3095 } 3096 3097 /** 3098 * An ActionMode Callback class that is used to provide actions while in text insertion or 3099 * selection mode. 3100 * 3101 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3102 * actions, depending on which of these this TextView supports and the current selection. 3103 */ 3104 private class TextActionModeCallback extends ActionMode.Callback2 { 3105 private final Path mSelectionPath = new Path(); 3106 private final RectF mSelectionBounds = new RectF(); 3107 private final boolean mHasSelection; 3108 3109 private int mHandleHeight; 3110 3111 public TextActionModeCallback(boolean hasSelection) { 3112 mHasSelection = hasSelection; 3113 if (mHasSelection) { 3114 SelectionModifierCursorController selectionController = getSelectionController(); 3115 if (selectionController.mStartHandle == null) { 3116 // As these are for initializing selectionController, hide() must be called. 3117 selectionController.initDrawables(); 3118 selectionController.initHandles(); 3119 selectionController.hide(); 3120 } 3121 mHandleHeight = Math.max( 3122 mSelectHandleLeft.getMinimumHeight(), 3123 mSelectHandleRight.getMinimumHeight()); 3124 } else { 3125 InsertionPointCursorController insertionController = getInsertionController(); 3126 if (insertionController != null) { 3127 insertionController.getHandle(); 3128 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3129 } 3130 } 3131 } 3132 3133 @Override 3134 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3135 mode.setTitle(null); 3136 mode.setSubtitle(null); 3137 mode.setTitleOptionalHint(true); 3138 populateMenuWithItems(menu); 3139 3140 Callback customCallback = getCustomCallback(); 3141 if (customCallback != null) { 3142 if (!customCallback.onCreateActionMode(mode, menu)) { 3143 // The custom mode can choose to cancel the action mode, dismiss selection. 3144 Selection.setSelection((Spannable) mTextView.getText(), 3145 mTextView.getSelectionEnd()); 3146 return false; 3147 } 3148 } 3149 3150 addIntentMenuItemsForTextProcessing(menu); 3151 3152 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3153 mTextView.setHasTransientState(true); 3154 return true; 3155 } else { 3156 return false; 3157 } 3158 } 3159 3160 private Callback getCustomCallback() { 3161 return mHasSelection 3162 ? mCustomSelectionActionModeCallback 3163 : mCustomInsertionActionModeCallback; 3164 } 3165 3166 private void populateMenuWithItems(Menu menu) { 3167 if (mTextView.canCut()) { 3168 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3169 com.android.internal.R.string.cut). 3170 setAlphabeticShortcut('x'). 3171 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3172 } 3173 3174 if (mTextView.canCopy()) { 3175 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3176 com.android.internal.R.string.copy). 3177 setAlphabeticShortcut('c'). 3178 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3179 } 3180 3181 if (mTextView.canPaste()) { 3182 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3183 com.android.internal.R.string.paste). 3184 setAlphabeticShortcut('v'). 3185 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3186 } 3187 3188 if (mTextView.canShare()) { 3189 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3190 com.android.internal.R.string.share). 3191 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3192 } 3193 3194 updateSelectAllItem(menu); 3195 updateReplaceItem(menu); 3196 } 3197 3198 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3199 if (mTextView.canProcessText()) { 3200 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3201 List<ResolveInfo> supportedActivities = 3202 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3203 for (int i = 0; i < supportedActivities.size(); ++i) { 3204 ResolveInfo info = supportedActivities.get(i); 3205 menu.add(Menu.NONE, Menu.NONE, 3206 MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i, 3207 info.loadLabel(packageManager)) 3208 .setIntent(createProcessTextIntentForResolveInfo(info)) 3209 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3210 } 3211 } 3212 } 3213 3214 private Intent createProcessTextIntent() { 3215 return new Intent() 3216 .setAction(Intent.ACTION_PROCESS_TEXT) 3217 .setType("text/plain"); 3218 } 3219 3220 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3221 return createProcessTextIntent() 3222 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3223 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3224 } 3225 3226 @Override 3227 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3228 updateSelectAllItem(menu); 3229 updateReplaceItem(menu); 3230 3231 Callback customCallback = getCustomCallback(); 3232 if (customCallback != null) { 3233 return customCallback.onPrepareActionMode(mode, menu); 3234 } 3235 return true; 3236 } 3237 3238 private void updateSelectAllItem(Menu menu) { 3239 boolean canSelectAll = mTextView.canSelectAllText(); 3240 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3241 if (canSelectAll && !selectAllItemExists) { 3242 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3243 com.android.internal.R.string.selectAll) 3244 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3245 } else if (!canSelectAll && selectAllItemExists) { 3246 menu.removeItem(TextView.ID_SELECT_ALL); 3247 } 3248 } 3249 3250 private void updateReplaceItem(Menu menu) { 3251 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3252 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3253 if (canReplace && !replaceItemExists) { 3254 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3255 com.android.internal.R.string.replace) 3256 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3257 } else if (!canReplace && replaceItemExists) { 3258 menu.removeItem(TextView.ID_REPLACE); 3259 } 3260 } 3261 3262 @Override 3263 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3264 if (item.getIntent() != null 3265 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3266 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3267 mPreserveDetachedSelection = true; 3268 mTextView.startActivityForResult( 3269 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3270 return true; 3271 } 3272 Callback customCallback = getCustomCallback(); 3273 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3274 return true; 3275 } 3276 return mTextView.onTextContextMenuItem(item.getItemId()); 3277 } 3278 3279 @Override 3280 public void onDestroyActionMode(ActionMode mode) { 3281 Callback customCallback = getCustomCallback(); 3282 if (customCallback != null) { 3283 customCallback.onDestroyActionMode(mode); 3284 } 3285 3286 /* 3287 * If we're ending this mode because we're detaching from a window, 3288 * we still have selection state to preserve. Don't clear it, we'll 3289 * bring back the selection mode when (if) we get reattached. 3290 */ 3291 if (!mPreserveDetachedSelection) { 3292 Selection.setSelection((Spannable) mTextView.getText(), 3293 mTextView.getSelectionEnd()); 3294 mTextView.setHasTransientState(false); 3295 } 3296 3297 if (mSelectionModifierCursorController != null) { 3298 mSelectionModifierCursorController.hide(); 3299 } 3300 3301 mTextActionMode = null; 3302 } 3303 3304 @Override 3305 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3306 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3307 super.onGetContentRect(mode, view, outRect); 3308 return; 3309 } 3310 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3311 // We have a selection. 3312 mSelectionPath.reset(); 3313 mTextView.getLayout().getSelectionPath( 3314 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3315 mSelectionPath.computeBounds(mSelectionBounds, true); 3316 mSelectionBounds.bottom += mHandleHeight; 3317 } else if (mCursorCount == 2) { 3318 // We have a split cursor. In this case, we take the rectangle that includes both 3319 // parts of the cursor to ensure we don't obscure either of them. 3320 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3321 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3322 mSelectionBounds.set( 3323 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3324 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3325 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3326 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3327 + mHandleHeight); 3328 } else { 3329 // We have a single cursor. 3330 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3331 float primaryHorizontal = 3332 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3333 mSelectionBounds.set( 3334 primaryHorizontal, 3335 mTextView.getLayout().getLineTop(line), 3336 primaryHorizontal + 1, 3337 mTextView.getLayout().getLineTop(line + 1) + mHandleHeight); 3338 } 3339 // Take TextView's padding and scroll into account. 3340 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3341 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3342 outRect.set( 3343 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3344 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3345 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3346 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3347 } 3348 } 3349 3350 /** 3351 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3352 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3353 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3354 */ 3355 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3356 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3357 final int[] mTmpIntOffset = new int[2]; 3358 final Matrix mViewToScreenMatrix = new Matrix(); 3359 3360 @Override 3361 public void updatePosition(int parentPositionX, int parentPositionY, 3362 boolean parentPositionChanged, boolean parentScrolled) { 3363 final InputMethodState ims = mInputMethodState; 3364 if (ims == null || ims.mBatchEditNesting > 0) { 3365 return; 3366 } 3367 final InputMethodManager imm = InputMethodManager.peekInstance(); 3368 if (null == imm) { 3369 return; 3370 } 3371 if (!imm.isActive(mTextView)) { 3372 return; 3373 } 3374 // Skip if the IME has not requested the cursor/anchor position. 3375 if (!imm.isCursorAnchorInfoEnabled()) { 3376 return; 3377 } 3378 Layout layout = mTextView.getLayout(); 3379 if (layout == null) { 3380 return; 3381 } 3382 3383 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3384 builder.reset(); 3385 3386 final int selectionStart = mTextView.getSelectionStart(); 3387 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3388 3389 // Construct transformation matrix from view local coordinates to screen coordinates. 3390 mViewToScreenMatrix.set(mTextView.getMatrix()); 3391 mTextView.getLocationOnScreen(mTmpIntOffset); 3392 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3393 builder.setMatrix(mViewToScreenMatrix); 3394 3395 final float viewportToContentHorizontalOffset = 3396 mTextView.viewportToContentHorizontalOffset(); 3397 final float viewportToContentVerticalOffset = 3398 mTextView.viewportToContentVerticalOffset(); 3399 3400 final CharSequence text = mTextView.getText(); 3401 if (text instanceof Spannable) { 3402 final Spannable sp = (Spannable) text; 3403 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3404 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3405 if (composingTextEnd < composingTextStart) { 3406 final int temp = composingTextEnd; 3407 composingTextEnd = composingTextStart; 3408 composingTextStart = temp; 3409 } 3410 final boolean hasComposingText = 3411 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3412 if (hasComposingText) { 3413 final CharSequence composingText = text.subSequence(composingTextStart, 3414 composingTextEnd); 3415 builder.setComposingText(composingTextStart, composingText); 3416 3417 final int minLine = layout.getLineForOffset(composingTextStart); 3418 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3419 for (int line = minLine; line <= maxLine; ++line) { 3420 final int lineStart = layout.getLineStart(line); 3421 final int lineEnd = layout.getLineEnd(line); 3422 final int offsetStart = Math.max(lineStart, composingTextStart); 3423 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3424 final boolean ltrLine = 3425 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3426 final float[] widths = new float[offsetEnd - offsetStart]; 3427 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3428 final float top = layout.getLineTop(line); 3429 final float bottom = layout.getLineBottom(line); 3430 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3431 final float charWidth = widths[offset - offsetStart]; 3432 final boolean isRtl = layout.isRtlCharAt(offset); 3433 final float primary = layout.getPrimaryHorizontal(offset); 3434 final float secondary = layout.getSecondaryHorizontal(offset); 3435 // TODO: This doesn't work perfectly for text with custom styles and 3436 // TAB chars. 3437 final float left; 3438 final float right; 3439 if (ltrLine) { 3440 if (isRtl) { 3441 left = secondary - charWidth; 3442 right = secondary; 3443 } else { 3444 left = primary; 3445 right = primary + charWidth; 3446 } 3447 } else { 3448 if (!isRtl) { 3449 left = secondary; 3450 right = secondary + charWidth; 3451 } else { 3452 left = primary - charWidth; 3453 right = primary; 3454 } 3455 } 3456 // TODO: Check top-right and bottom-left as well. 3457 final float localLeft = left + viewportToContentHorizontalOffset; 3458 final float localRight = right + viewportToContentHorizontalOffset; 3459 final float localTop = top + viewportToContentVerticalOffset; 3460 final float localBottom = bottom + viewportToContentVerticalOffset; 3461 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3462 final boolean isBottomRightVisible = 3463 isPositionVisible(localRight, localBottom); 3464 int characterBoundsFlags = 0; 3465 if (isTopLeftVisible || isBottomRightVisible) { 3466 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3467 } 3468 if (!isTopLeftVisible || !isBottomRightVisible) { 3469 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3470 } 3471 if (isRtl) { 3472 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3473 } 3474 // Here offset is the index in Java chars. 3475 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3476 localBottom, characterBoundsFlags); 3477 } 3478 } 3479 } 3480 } 3481 3482 // Treat selectionStart as the insertion point. 3483 if (0 <= selectionStart) { 3484 final int offset = selectionStart; 3485 final int line = layout.getLineForOffset(offset); 3486 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3487 + viewportToContentHorizontalOffset; 3488 final float insertionMarkerTop = layout.getLineTop(line) 3489 + viewportToContentVerticalOffset; 3490 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3491 + viewportToContentVerticalOffset; 3492 final float insertionMarkerBottom = layout.getLineBottom(line) 3493 + viewportToContentVerticalOffset; 3494 final boolean isTopVisible = 3495 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3496 final boolean isBottomVisible = 3497 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3498 int insertionMarkerFlags = 0; 3499 if (isTopVisible || isBottomVisible) { 3500 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3501 } 3502 if (!isTopVisible || !isBottomVisible) { 3503 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3504 } 3505 if (layout.isRtlCharAt(offset)) { 3506 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3507 } 3508 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3509 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3510 } 3511 3512 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3513 } 3514 } 3515 3516 private abstract class HandleView extends View implements TextViewPositionListener { 3517 protected Drawable mDrawable; 3518 protected Drawable mDrawableLtr; 3519 protected Drawable mDrawableRtl; 3520 private final PopupWindow mContainer; 3521 // Position with respect to the parent TextView 3522 private int mPositionX, mPositionY; 3523 private boolean mIsDragging; 3524 // Offset from touch position to mPosition 3525 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3526 protected int mHotspotX; 3527 protected int mHorizontalGravity; 3528 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3529 private float mTouchOffsetY; 3530 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3531 private float mIdealVerticalOffset; 3532 // Parent's (TextView) previous position in window 3533 private int mLastParentX, mLastParentY; 3534 // Previous text character offset 3535 protected int mPreviousOffset = -1; 3536 // Previous text character offset 3537 private boolean mPositionHasChanged = true; 3538 // Minimum touch target size for handles 3539 private int mMinSize; 3540 // Indicates the line of text that the handle is on. 3541 protected int mPrevLine = -1; 3542 3543 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3544 super(mTextView.getContext()); 3545 mContainer = new PopupWindow(mTextView.getContext(), null, 3546 com.android.internal.R.attr.textSelectHandleWindowStyle); 3547 mContainer.setSplitTouchEnabled(true); 3548 mContainer.setClippingEnabled(false); 3549 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3550 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3551 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3552 mContainer.setContentView(this); 3553 3554 mDrawableLtr = drawableLtr; 3555 mDrawableRtl = drawableRtl; 3556 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3557 com.android.internal.R.dimen.text_handle_min_size); 3558 3559 updateDrawable(); 3560 3561 final int handleHeight = getPreferredHeight(); 3562 mTouchOffsetY = -0.3f * handleHeight; 3563 mIdealVerticalOffset = 0.7f * handleHeight; 3564 } 3565 3566 public float getIdealVerticalOffset() { 3567 return mIdealVerticalOffset; 3568 } 3569 3570 protected void updateDrawable() { 3571 if (mIsDragging) { 3572 // Don't update drawable during dragging. 3573 return; 3574 } 3575 final int offset = getCurrentCursorOffset(); 3576 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3577 final Drawable oldDrawable = mDrawable; 3578 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3579 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3580 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3581 final Layout layout = mTextView.getLayout(); 3582 if (layout != null && oldDrawable != mDrawable && isShowing()) { 3583 // Update popup window position. 3584 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3585 getHorizontalOffset() + getCursorOffset()); 3586 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3587 mPositionHasChanged = true; 3588 updatePosition(mLastParentX, mLastParentY, false, false); 3589 postInvalidate(); 3590 } 3591 } 3592 3593 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3594 protected abstract int getHorizontalGravity(boolean isRtlRun); 3595 3596 // Touch-up filter: number of previous positions remembered 3597 private static final int HISTORY_SIZE = 5; 3598 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3599 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3600 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3601 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3602 private int mPreviousOffsetIndex = 0; 3603 private int mNumberPreviousOffsets = 0; 3604 3605 private void startTouchUpFilter(int offset) { 3606 mNumberPreviousOffsets = 0; 3607 addPositionToTouchUpFilter(offset); 3608 } 3609 3610 private void addPositionToTouchUpFilter(int offset) { 3611 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3612 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3613 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3614 mNumberPreviousOffsets++; 3615 } 3616 3617 private void filterOnTouchUp() { 3618 final long now = SystemClock.uptimeMillis(); 3619 int i = 0; 3620 int index = mPreviousOffsetIndex; 3621 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3622 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3623 i++; 3624 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3625 } 3626 3627 if (i > 0 && i < iMax && 3628 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3629 positionAtCursorOffset(mPreviousOffsets[index], false); 3630 } 3631 } 3632 3633 public boolean offsetHasBeenChanged() { 3634 return mNumberPreviousOffsets > 1; 3635 } 3636 3637 @Override 3638 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3639 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3640 } 3641 3642 private int getPreferredWidth() { 3643 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3644 } 3645 3646 private int getPreferredHeight() { 3647 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3648 } 3649 3650 public void show() { 3651 if (isShowing()) return; 3652 3653 getPositionListener().addSubscriber(this, true /* local position may change */); 3654 3655 // Make sure the offset is always considered new, even when focusing at same position 3656 mPreviousOffset = -1; 3657 positionAtCursorOffset(getCurrentCursorOffset(), false); 3658 } 3659 3660 protected void dismiss() { 3661 mIsDragging = false; 3662 mContainer.dismiss(); 3663 onDetached(); 3664 } 3665 3666 public void hide() { 3667 dismiss(); 3668 3669 getPositionListener().removeSubscriber(this); 3670 } 3671 3672 public boolean isShowing() { 3673 return mContainer.isShowing(); 3674 } 3675 3676 private boolean isVisible() { 3677 // Always show a dragging handle. 3678 if (mIsDragging) { 3679 return true; 3680 } 3681 3682 if (mTextView.isInBatchEditMode()) { 3683 return false; 3684 } 3685 3686 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3687 } 3688 3689 public abstract int getCurrentCursorOffset(); 3690 3691 protected abstract void updateSelection(int offset); 3692 3693 public abstract void updatePosition(float x, float y); 3694 3695 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3696 // A HandleView relies on the layout, which may be nulled by external methods 3697 Layout layout = mTextView.getLayout(); 3698 if (layout == null) { 3699 // Will update controllers' state, hiding them and stopping selection mode if needed 3700 prepareCursorControllers(); 3701 return; 3702 } 3703 3704 boolean offsetChanged = offset != mPreviousOffset; 3705 if (offsetChanged || parentScrolled) { 3706 if (offsetChanged) { 3707 updateSelection(offset); 3708 addPositionToTouchUpFilter(offset); 3709 } 3710 final int line = layout.getLineForOffset(offset); 3711 mPrevLine = line; 3712 3713 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3714 getHorizontalOffset() + getCursorOffset()); 3715 mPositionY = layout.getLineBottom(line); 3716 3717 // Take TextView's padding and scroll into account. 3718 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3719 mPositionY += mTextView.viewportToContentVerticalOffset(); 3720 3721 mPreviousOffset = offset; 3722 mPositionHasChanged = true; 3723 } 3724 } 3725 3726 public void updatePosition(int parentPositionX, int parentPositionY, 3727 boolean parentPositionChanged, boolean parentScrolled) { 3728 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3729 if (parentPositionChanged || mPositionHasChanged) { 3730 if (mIsDragging) { 3731 // Update touchToWindow offset in case of parent scrolling while dragging 3732 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3733 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3734 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3735 mLastParentX = parentPositionX; 3736 mLastParentY = parentPositionY; 3737 } 3738 3739 onHandleMoved(); 3740 } 3741 3742 if (isVisible()) { 3743 final int positionX = parentPositionX + mPositionX; 3744 final int positionY = parentPositionY + mPositionY; 3745 if (isShowing()) { 3746 mContainer.update(positionX, positionY, -1, -1); 3747 } else { 3748 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3749 positionX, positionY); 3750 } 3751 } else { 3752 if (isShowing()) { 3753 dismiss(); 3754 } 3755 } 3756 3757 mPositionHasChanged = false; 3758 } 3759 } 3760 3761 public void showAtLocation(int offset) { 3762 // TODO - investigate if there's a better way to show the handles 3763 // after the drag accelerator has occured. 3764 int[] tmpCords = new int[2]; 3765 mTextView.getLocationInWindow(tmpCords); 3766 3767 Layout layout = mTextView.getLayout(); 3768 int posX = tmpCords[0]; 3769 int posY = tmpCords[1]; 3770 3771 final int line = layout.getLineForOffset(offset); 3772 3773 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3774 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3775 int startY = layout.getLineBottom(line); 3776 3777 // Take TextView's padding and scroll into account. 3778 startX += mTextView.viewportToContentHorizontalOffset(); 3779 startY += mTextView.viewportToContentVerticalOffset(); 3780 3781 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3782 startX + posX, startY + posY); 3783 } 3784 3785 @Override 3786 protected void onDraw(Canvas c) { 3787 final int drawWidth = mDrawable.getIntrinsicWidth(); 3788 final int left = getHorizontalOffset(); 3789 3790 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3791 mDrawable.draw(c); 3792 } 3793 3794 private int getHorizontalOffset() { 3795 final int width = getPreferredWidth(); 3796 final int drawWidth = mDrawable.getIntrinsicWidth(); 3797 final int left; 3798 switch (mHorizontalGravity) { 3799 case Gravity.LEFT: 3800 left = 0; 3801 break; 3802 default: 3803 case Gravity.CENTER: 3804 left = (width - drawWidth) / 2; 3805 break; 3806 case Gravity.RIGHT: 3807 left = width - drawWidth; 3808 break; 3809 } 3810 return left; 3811 } 3812 3813 protected int getCursorOffset() { 3814 return 0; 3815 } 3816 3817 @Override 3818 public boolean onTouchEvent(MotionEvent ev) { 3819 updateFloatingToolbarVisibility(ev); 3820 3821 switch (ev.getActionMasked()) { 3822 case MotionEvent.ACTION_DOWN: { 3823 startTouchUpFilter(getCurrentCursorOffset()); 3824 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3825 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3826 3827 final PositionListener positionListener = getPositionListener(); 3828 mLastParentX = positionListener.getPositionX(); 3829 mLastParentY = positionListener.getPositionY(); 3830 mIsDragging = true; 3831 break; 3832 } 3833 3834 case MotionEvent.ACTION_MOVE: { 3835 final float rawX = ev.getRawX(); 3836 final float rawY = ev.getRawY(); 3837 3838 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3839 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3840 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3841 float newVerticalOffset; 3842 if (previousVerticalOffset < mIdealVerticalOffset) { 3843 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3844 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3845 } else { 3846 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3847 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3848 } 3849 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3850 3851 final float newPosX = 3852 rawX - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 3853 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3854 3855 updatePosition(newPosX, newPosY); 3856 break; 3857 } 3858 3859 case MotionEvent.ACTION_UP: 3860 filterOnTouchUp(); 3861 mIsDragging = false; 3862 updateDrawable(); 3863 break; 3864 3865 case MotionEvent.ACTION_CANCEL: 3866 mIsDragging = false; 3867 updateDrawable(); 3868 break; 3869 } 3870 return true; 3871 } 3872 3873 public boolean isDragging() { 3874 return mIsDragging; 3875 } 3876 3877 void onHandleMoved() {} 3878 3879 public void onDetached() {} 3880 } 3881 3882 private class InsertionHandleView extends HandleView { 3883 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3884 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3885 3886 // Used to detect taps on the insertion handle, which will affect the insertion action mode 3887 private float mDownPositionX, mDownPositionY; 3888 private Runnable mHider; 3889 3890 public InsertionHandleView(Drawable drawable) { 3891 super(drawable, drawable); 3892 } 3893 3894 @Override 3895 public void show() { 3896 super.show(); 3897 3898 final long durationSinceCutOrCopy = 3899 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 3900 3901 // Cancel the single tap delayed runnable. 3902 if (mInsertionActionModeRunnable != null 3903 && (mDoubleTap || isCursorInsideEasyCorrectionSpan())) { 3904 mTextView.removeCallbacks(mInsertionActionModeRunnable); 3905 } 3906 3907 // Prepare and schedule the single tap runnable to run exactly after the double tap 3908 // timeout has passed. 3909 if (!mDoubleTap && !isCursorInsideEasyCorrectionSpan() 3910 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 3911 if (mTextActionMode == null) { 3912 if (mInsertionActionModeRunnable == null) { 3913 mInsertionActionModeRunnable = new Runnable() { 3914 @Override 3915 public void run() { 3916 startInsertionActionMode(); 3917 } 3918 }; 3919 } 3920 mTextView.postDelayed( 3921 mInsertionActionModeRunnable, 3922 ViewConfiguration.getDoubleTapTimeout() + 1); 3923 } 3924 3925 } 3926 3927 hideAfterDelay(); 3928 } 3929 3930 private void hideAfterDelay() { 3931 if (mHider == null) { 3932 mHider = new Runnable() { 3933 public void run() { 3934 hide(); 3935 } 3936 }; 3937 } else { 3938 removeHiderCallback(); 3939 } 3940 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3941 } 3942 3943 private void removeHiderCallback() { 3944 if (mHider != null) { 3945 mTextView.removeCallbacks(mHider); 3946 } 3947 } 3948 3949 @Override 3950 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3951 return drawable.getIntrinsicWidth() / 2; 3952 } 3953 3954 @Override 3955 protected int getHorizontalGravity(boolean isRtlRun) { 3956 return Gravity.CENTER_HORIZONTAL; 3957 } 3958 3959 @Override 3960 protected int getCursorOffset() { 3961 int offset = super.getCursorOffset(); 3962 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3963 if (cursor != null) { 3964 cursor.getPadding(mTempRect); 3965 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3966 } 3967 return offset; 3968 } 3969 3970 @Override 3971 public boolean onTouchEvent(MotionEvent ev) { 3972 final boolean result = super.onTouchEvent(ev); 3973 3974 switch (ev.getActionMasked()) { 3975 case MotionEvent.ACTION_DOWN: 3976 mDownPositionX = ev.getRawX(); 3977 mDownPositionY = ev.getRawY(); 3978 break; 3979 3980 case MotionEvent.ACTION_UP: 3981 if (!offsetHasBeenChanged()) { 3982 final float deltaX = mDownPositionX - ev.getRawX(); 3983 final float deltaY = mDownPositionY - ev.getRawY(); 3984 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3985 3986 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3987 mTextView.getContext()); 3988 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3989 3990 if (distanceSquared < touchSlop * touchSlop) { 3991 // Tapping on the handle toggles the insertion action mode. 3992 if (mTextActionMode != null) { 3993 mTextActionMode.finish(); 3994 } else { 3995 startInsertionActionMode(); 3996 } 3997 } 3998 } else { 3999 if (mTextActionMode != null) { 4000 mTextActionMode.invalidateContentRect(); 4001 } 4002 } 4003 hideAfterDelay(); 4004 break; 4005 4006 case MotionEvent.ACTION_CANCEL: 4007 hideAfterDelay(); 4008 break; 4009 4010 default: 4011 break; 4012 } 4013 4014 return result; 4015 } 4016 4017 @Override 4018 public int getCurrentCursorOffset() { 4019 return mTextView.getSelectionStart(); 4020 } 4021 4022 @Override 4023 public void updateSelection(int offset) { 4024 Selection.setSelection((Spannable) mTextView.getText(), offset); 4025 } 4026 4027 @Override 4028 public void updatePosition(float x, float y) { 4029 Layout layout = mTextView.getLayout(); 4030 int offset; 4031 if (layout != null) { 4032 int currLine = getCurrentLineAdjustedForSlop(layout, mPrevLine, y); 4033 offset = mTextView.getOffsetAtCoordinate(currLine, x); 4034 } else { 4035 offset = mTextView.getOffsetForPosition(x, y); 4036 } 4037 positionAtCursorOffset(offset, false); 4038 if (mTextActionMode != null) { 4039 mTextActionMode.invalidate(); 4040 } 4041 } 4042 4043 @Override 4044 void onHandleMoved() { 4045 super.onHandleMoved(); 4046 removeHiderCallback(); 4047 } 4048 4049 @Override 4050 public void onDetached() { 4051 super.onDetached(); 4052 removeHiderCallback(); 4053 } 4054 } 4055 4056 private class SelectionStartHandleView extends HandleView { 4057 // Indicates whether the cursor is making adjustments within a word. 4058 private boolean mInWord = false; 4059 // Difference between touch position and word boundary position. 4060 private float mTouchWordDelta; 4061 4062 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4063 super(drawableLtr, drawableRtl); 4064 } 4065 4066 @Override 4067 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4068 if (isRtlRun) { 4069 return drawable.getIntrinsicWidth() / 4; 4070 } else { 4071 return (drawable.getIntrinsicWidth() * 3) / 4; 4072 } 4073 } 4074 4075 @Override 4076 protected int getHorizontalGravity(boolean isRtlRun) { 4077 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 4078 } 4079 4080 @Override 4081 public int getCurrentCursorOffset() { 4082 return mTextView.getSelectionStart(); 4083 } 4084 4085 @Override 4086 public void updateSelection(int offset) { 4087 Selection.setSelection((Spannable) mTextView.getText(), offset, 4088 mTextView.getSelectionEnd()); 4089 updateDrawable(); 4090 if (mTextActionMode != null) { 4091 mTextActionMode.invalidate(); 4092 } 4093 } 4094 4095 @Override 4096 public void updatePosition(float x, float y) { 4097 final Layout layout = mTextView.getLayout(); 4098 if (layout == null) { 4099 // HandleView will deal appropriately in positionAtCursorOffset when 4100 // layout is null. 4101 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 4102 return; 4103 } 4104 4105 boolean positionCursor = false; 4106 final int selectionEnd = mTextView.getSelectionEnd(); 4107 int currLine = getCurrentLineAdjustedForSlop(layout, mPrevLine, y); 4108 int initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4109 4110 if (initialOffset >= selectionEnd) { 4111 // Handles have crossed, bound it to the last selected line and 4112 // adjust by word / char as normal. 4113 currLine = layout.getLineForOffset(selectionEnd); 4114 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4115 } 4116 4117 int offset = initialOffset; 4118 int end = getWordEnd(offset); 4119 int start = getWordStart(offset); 4120 4121 if (offset < mPreviousOffset) { 4122 // User is increasing the selection. 4123 if (!mInWord || currLine < mPrevLine) { 4124 // We're not in a word, or we're on a different line so we'll expand by 4125 // word. First ensure the user has at least entered the next word. 4126 int offsetToWord = Math.min((end - start) / 2, 2); 4127 if (offset <= end - offsetToWord || currLine < mPrevLine) { 4128 offset = start; 4129 } else { 4130 offset = mPreviousOffset; 4131 } 4132 } 4133 if (layout != null && offset < initialOffset) { 4134 final float adjustedX = layout.getPrimaryHorizontal(offset); 4135 mTouchWordDelta = 4136 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4137 } else { 4138 mTouchWordDelta = 0.0f; 4139 } 4140 positionCursor = true; 4141 } else { 4142 final int adjustedOffset = 4143 mTextView.getOffsetAtCoordinate(currLine, x - mTouchWordDelta); 4144 if (adjustedOffset > mPreviousOffset || currLine > mPrevLine) { 4145 // User is shrinking the selection. 4146 if (currLine > mPrevLine) { 4147 // We're on a different line, so we'll snap to word boundaries. 4148 offset = start; 4149 if (layout != null && offset < initialOffset) { 4150 final float adjustedX = layout.getPrimaryHorizontal(offset); 4151 mTouchWordDelta = 4152 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4153 } else { 4154 mTouchWordDelta = 0.0f; 4155 } 4156 } else { 4157 offset = adjustedOffset; 4158 } 4159 positionCursor = true; 4160 } else if (adjustedOffset < mPreviousOffset) { 4161 // Handle has jumped to the start of the word, and the user is moving 4162 // their finger towards the handle, the delta should be updated. 4163 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4164 - layout.getPrimaryHorizontal(mPreviousOffset); 4165 } 4166 } 4167 4168 if (positionCursor) { 4169 // Handles can not cross and selection is at least one character. 4170 if (offset >= selectionEnd) { 4171 offset = getNextCursorOffset(selectionEnd, false); 4172 mTouchWordDelta = 0.0f; 4173 } 4174 positionAtCursorOffset(offset, false); 4175 } 4176 } 4177 4178 @Override 4179 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4180 super.positionAtCursorOffset(offset, parentScrolled); 4181 mInWord = !getWordIteratorWithText().isBoundary(offset); 4182 } 4183 4184 @Override 4185 public boolean onTouchEvent(MotionEvent event) { 4186 boolean superResult = super.onTouchEvent(event); 4187 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4188 // Reset the touch word offset when the user has lifted their finger. 4189 mTouchWordDelta = 0.0f; 4190 } 4191 return superResult; 4192 } 4193 } 4194 4195 private class SelectionEndHandleView extends HandleView { 4196 // Indicates whether the cursor is making adjustments within a word. 4197 private boolean mInWord = false; 4198 // Difference between touch position and word boundary position. 4199 private float mTouchWordDelta; 4200 4201 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4202 super(drawableLtr, drawableRtl); 4203 } 4204 4205 @Override 4206 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4207 if (isRtlRun) { 4208 return (drawable.getIntrinsicWidth() * 3) / 4; 4209 } else { 4210 return drawable.getIntrinsicWidth() / 4; 4211 } 4212 } 4213 4214 @Override 4215 protected int getHorizontalGravity(boolean isRtlRun) { 4216 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 4217 } 4218 4219 @Override 4220 public int getCurrentCursorOffset() { 4221 return mTextView.getSelectionEnd(); 4222 } 4223 4224 @Override 4225 public void updateSelection(int offset) { 4226 Selection.setSelection((Spannable) mTextView.getText(), 4227 mTextView.getSelectionStart(), offset); 4228 if (mTextActionMode != null) { 4229 mTextActionMode.invalidate(); 4230 } 4231 updateDrawable(); 4232 } 4233 4234 @Override 4235 public void updatePosition(float x, float y) { 4236 final Layout layout = mTextView.getLayout(); 4237 if (layout == null) { 4238 // HandleView will deal appropriately in positionAtCursorOffset when 4239 // layout is null. 4240 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 4241 return; 4242 } 4243 4244 boolean positionCursor = false; 4245 final int selectionStart = mTextView.getSelectionStart(); 4246 int currLine = getCurrentLineAdjustedForSlop(layout, mPrevLine, y); 4247 int initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4248 4249 if (initialOffset <= selectionStart) { 4250 // Handles have crossed, bound it to the first selected line and 4251 // adjust by word / char as normal. 4252 currLine = layout.getLineForOffset(selectionStart); 4253 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4254 } 4255 4256 int offset = initialOffset; 4257 int end = getWordEnd(offset); 4258 int start = getWordStart(offset); 4259 4260 if (offset > mPreviousOffset) { 4261 // User is increasing the selection. 4262 if (!mInWord || currLine > mPrevLine) { 4263 // We're not in a word, or we're on a different line so we'll expand by 4264 // word. First ensure the user has at least entered the next word. 4265 int midPoint = Math.min((end - start) / 2, 2); 4266 if (offset >= start + midPoint || currLine > mPrevLine) { 4267 offset = end; 4268 } else { 4269 offset = mPreviousOffset; 4270 } 4271 } 4272 if (offset > initialOffset) { 4273 final float adjustedX = layout.getPrimaryHorizontal(offset); 4274 mTouchWordDelta = 4275 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4276 } else { 4277 mTouchWordDelta = 0.0f; 4278 } 4279 positionCursor = true; 4280 } else { 4281 final int adjustedOffset = 4282 mTextView.getOffsetAtCoordinate(currLine, x + mTouchWordDelta); 4283 if (adjustedOffset < mPreviousOffset || currLine < mPrevLine) { 4284 // User is shrinking the selection. 4285 if (currLine < mPrevLine) { 4286 // We're on a different line, so we'll snap to word boundaries. 4287 offset = end; 4288 if (offset > initialOffset) { 4289 final float adjustedX = layout.getPrimaryHorizontal(offset); 4290 mTouchWordDelta = 4291 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4292 } else { 4293 mTouchWordDelta = 0.0f; 4294 } 4295 } else { 4296 offset = adjustedOffset; 4297 } 4298 positionCursor = true; 4299 } else if (adjustedOffset > mPreviousOffset) { 4300 // Handle has jumped to the end of the word, and the user is moving 4301 // their finger towards the handle, the delta should be updated. 4302 mTouchWordDelta = layout.getPrimaryHorizontal(mPreviousOffset) 4303 - mTextView.convertToLocalHorizontalCoordinate(x); 4304 } 4305 } 4306 4307 if (positionCursor) { 4308 // Handles can not cross and selection is at least one character. 4309 if (offset <= selectionStart) { 4310 offset = getNextCursorOffset(selectionStart, true); 4311 mTouchWordDelta = 0.0f; 4312 } 4313 positionAtCursorOffset(offset, false); 4314 } 4315 } 4316 4317 @Override 4318 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4319 super.positionAtCursorOffset(offset, parentScrolled); 4320 mInWord = !getWordIteratorWithText().isBoundary(offset); 4321 } 4322 4323 @Override 4324 public boolean onTouchEvent(MotionEvent event) { 4325 boolean superResult = super.onTouchEvent(event); 4326 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4327 // Reset the touch word offset when the user has lifted their finger. 4328 mTouchWordDelta = 0.0f; 4329 } 4330 return superResult; 4331 } 4332 } 4333 4334 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 4335 if (layout == null || prevLine > layout.getLineCount() 4336 || layout.getLineCount() <= 0 || prevLine < 0) { 4337 // Invalid parameters, just return whatever line is at y. 4338 return mTextView.getLineAtCoordinate(y); 4339 } 4340 4341 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 4342 final int lineCount = layout.getLineCount(); 4343 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 4344 4345 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 4346 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 4347 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 4348 4349 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 4350 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 4351 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 4352 4353 // Determine if we've moved lines based on y position and previous line. 4354 int currLine; 4355 if (y <= yTopBound) { 4356 currLine = Math.max(prevLine - 1, 0); 4357 } else if (y >= yBottomBound) { 4358 currLine = Math.min(prevLine + 1, lineCount - 1); 4359 } else { 4360 currLine = prevLine; 4361 } 4362 return currLine; 4363 } 4364 4365 /** 4366 * A CursorController instance can be used to control a cursor in the text. 4367 */ 4368 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4369 /** 4370 * Makes the cursor controller visible on screen. 4371 * See also {@link #hide()}. 4372 */ 4373 public void show(); 4374 4375 /** 4376 * Hide the cursor controller from screen. 4377 * See also {@link #show()}. 4378 */ 4379 public void hide(); 4380 4381 /** 4382 * Called when the view is detached from window. Perform house keeping task, such as 4383 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4384 * preventing the activity from being recycled. 4385 */ 4386 public void onDetached(); 4387 } 4388 4389 private class InsertionPointCursorController implements CursorController { 4390 private InsertionHandleView mHandle; 4391 4392 public void show() { 4393 getHandle().show(); 4394 4395 if (mSelectionModifierCursorController != null) { 4396 mSelectionModifierCursorController.hide(); 4397 } 4398 } 4399 4400 public void hide() { 4401 if (mHandle != null) { 4402 mHandle.hide(); 4403 } 4404 } 4405 4406 public void onTouchModeChanged(boolean isInTouchMode) { 4407 if (!isInTouchMode) { 4408 hide(); 4409 } 4410 } 4411 4412 private InsertionHandleView getHandle() { 4413 if (mSelectHandleCenter == null) { 4414 mSelectHandleCenter = mTextView.getContext().getDrawable( 4415 mTextView.mTextSelectHandleRes); 4416 } 4417 if (mHandle == null) { 4418 mHandle = new InsertionHandleView(mSelectHandleCenter); 4419 } 4420 return mHandle; 4421 } 4422 4423 @Override 4424 public void onDetached() { 4425 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4426 observer.removeOnTouchModeChangeListener(this); 4427 4428 if (mHandle != null) mHandle.onDetached(); 4429 } 4430 } 4431 4432 class SelectionModifierCursorController implements CursorController { 4433 // The cursor controller handles, lazily created when shown. 4434 private SelectionStartHandleView mStartHandle; 4435 private SelectionEndHandleView mEndHandle; 4436 // The offsets of that last touch down event. Remembered to start selection there. 4437 private int mMinTouchOffset, mMaxTouchOffset; 4438 4439 private float mDownPositionX, mDownPositionY; 4440 private boolean mGestureStayedInTapRegion; 4441 4442 // Where the user first starts the drag motion. 4443 private int mStartOffset = -1; 4444 // Indicates whether the user is selecting text and using the drag accelerator. 4445 private boolean mDragAcceleratorActive; 4446 private boolean mHaventMovedEnoughToStartDrag; 4447 // The line that a selection happened most recently with the drag accelerator. 4448 private int mLineSelectionIsOn = -1; 4449 // Whether the drag accelerator has selected past the initial line. 4450 private boolean mSwitchedLines = false; 4451 4452 SelectionModifierCursorController() { 4453 resetTouchOffsets(); 4454 } 4455 4456 public void show() { 4457 if (mTextView.isInBatchEditMode()) { 4458 return; 4459 } 4460 initDrawables(); 4461 initHandles(); 4462 hideInsertionPointCursorController(); 4463 } 4464 4465 private void initDrawables() { 4466 if (mSelectHandleLeft == null) { 4467 mSelectHandleLeft = mTextView.getContext().getDrawable( 4468 mTextView.mTextSelectHandleLeftRes); 4469 } 4470 if (mSelectHandleRight == null) { 4471 mSelectHandleRight = mTextView.getContext().getDrawable( 4472 mTextView.mTextSelectHandleRightRes); 4473 } 4474 } 4475 4476 private void initHandles() { 4477 // Lazy object creation has to be done before updatePosition() is called. 4478 if (mStartHandle == null) { 4479 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4480 } 4481 if (mEndHandle == null) { 4482 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4483 } 4484 4485 mStartHandle.show(); 4486 mEndHandle.show(); 4487 4488 hideInsertionPointCursorController(); 4489 } 4490 4491 public void hide() { 4492 if (mStartHandle != null) mStartHandle.hide(); 4493 if (mEndHandle != null) mEndHandle.hide(); 4494 } 4495 4496 public void enterDrag() { 4497 // Just need to init the handles / hide insertion cursor. 4498 show(); 4499 mDragAcceleratorActive = true; 4500 // Start location of selection. 4501 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4502 mLastDownPositionY); 4503 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 4504 // Don't show the handles until user has lifted finger. 4505 hide(); 4506 4507 // This stops scrolling parents from intercepting the touch event, allowing 4508 // the user to continue dragging across the screen to select text; TextView will 4509 // scroll as necessary. 4510 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4511 } 4512 4513 public void onTouchEvent(MotionEvent event) { 4514 // This is done even when the View does not have focus, so that long presses can start 4515 // selection and tap can move cursor from this tap position. 4516 final float eventX = event.getX(); 4517 final float eventY = event.getY(); 4518 switch (event.getActionMasked()) { 4519 case MotionEvent.ACTION_DOWN: 4520 if (extractedTextModeWillBeStarted()) { 4521 // Prevent duplicating the selection handles until the mode starts. 4522 hide(); 4523 } else { 4524 // Remember finger down position, to be able to start selection from there. 4525 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 4526 eventX, eventY); 4527 4528 // Double tap detection 4529 if (mGestureStayedInTapRegion) { 4530 if (mDoubleTap) { 4531 final float deltaX = eventX - mDownPositionX; 4532 final float deltaY = eventY - mDownPositionY; 4533 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4534 4535 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4536 mTextView.getContext()); 4537 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4538 boolean stayedInArea = 4539 distanceSquared < doubleTapSlop * doubleTapSlop; 4540 4541 if (stayedInArea && isPositionOnText(eventX, eventY)) { 4542 selectCurrentWordAndStartDrag(); 4543 mDiscardNextActionUp = true; 4544 } 4545 } 4546 } 4547 4548 mDownPositionX = eventX; 4549 mDownPositionY = eventY; 4550 mGestureStayedInTapRegion = true; 4551 mHaventMovedEnoughToStartDrag = true; 4552 } 4553 break; 4554 4555 case MotionEvent.ACTION_POINTER_DOWN: 4556 case MotionEvent.ACTION_POINTER_UP: 4557 // Handle multi-point gestures. Keep min and max offset positions. 4558 // Only activated for devices that correctly handle multi-touch. 4559 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4560 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4561 updateMinAndMaxOffsets(event); 4562 } 4563 break; 4564 4565 case MotionEvent.ACTION_MOVE: 4566 final ViewConfiguration viewConfig = ViewConfiguration.get( 4567 mTextView.getContext()); 4568 final int touchSlop = viewConfig.getScaledTouchSlop(); 4569 4570 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 4571 final float deltaX = eventX - mDownPositionX; 4572 final float deltaY = eventY - mDownPositionY; 4573 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4574 4575 if (mGestureStayedInTapRegion) { 4576 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 4577 mGestureStayedInTapRegion = 4578 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 4579 } 4580 if (mHaventMovedEnoughToStartDrag) { 4581 // We don't start dragging until the user has moved enough. 4582 mHaventMovedEnoughToStartDrag = 4583 distanceSquared <= touchSlop * touchSlop; 4584 } 4585 } 4586 4587 if (mStartHandle != null && mStartHandle.isShowing()) { 4588 // Don't do the drag if the handles are showing already. 4589 break; 4590 } 4591 4592 if (mStartOffset != -1 && mTextView.getLayout() != null) { 4593 if (!mHaventMovedEnoughToStartDrag) { 4594 4595 float y = eventY; 4596 if (mSwitchedLines) { 4597 // Offset the finger by the same vertical offset as the handles. 4598 // This improves visibility of the content being selected by 4599 // shifting the finger below the content, this is applied once 4600 // the user has switched lines. 4601 final float fingerOffset = (mStartHandle != null) 4602 ? mStartHandle.getIdealVerticalOffset() 4603 : touchSlop; 4604 y = eventY - fingerOffset; 4605 } 4606 4607 final int currLine = getCurrentLineAdjustedForSlop( 4608 mTextView.getLayout(), 4609 mLineSelectionIsOn, y); 4610 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 4611 // Break early here, we want to offset the finger position from 4612 // the selection highlight, once the user moved their finger 4613 // to a different line we should apply the offset and *not* switch 4614 // lines until recomputing the position with the finger offset. 4615 mSwitchedLines = true; 4616 break; 4617 } 4618 4619 int startOffset; 4620 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 4621 // Snap to word boundaries. 4622 if (mStartOffset < offset) { 4623 // Expanding with end handle. 4624 offset = getWordEnd(offset); 4625 startOffset = getWordStart(mStartOffset); 4626 } else { 4627 // Expanding with start handle. 4628 offset = getWordStart(offset); 4629 startOffset = getWordEnd(mStartOffset); 4630 } 4631 mLineSelectionIsOn = currLine; 4632 Selection.setSelection((Spannable) mTextView.getText(), 4633 startOffset, offset); 4634 } 4635 } 4636 break; 4637 4638 case MotionEvent.ACTION_UP: 4639 if (mDragAcceleratorActive) { 4640 // No longer dragging to select text, let the parent intercept events. 4641 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4642 4643 show(); 4644 int startOffset = mTextView.getSelectionStart(); 4645 int endOffset = mTextView.getSelectionEnd(); 4646 4647 // Since we don't let drag handles pass once they're visible, we need to 4648 // make sure the start / end locations are correct because the user *can* 4649 // switch directions during the initial drag. 4650 if (endOffset < startOffset) { 4651 int tmp = endOffset; 4652 endOffset = startOffset; 4653 startOffset = tmp; 4654 4655 // Also update the selection with the right offsets in this case. 4656 Selection.setSelection((Spannable) mTextView.getText(), 4657 startOffset, endOffset); 4658 } 4659 4660 // Need to do this to display the handles. 4661 mStartHandle.showAtLocation(startOffset); 4662 mEndHandle.showAtLocation(endOffset); 4663 4664 // No longer the first dragging motion, reset. 4665 if (!(mTextView.isInExtractedMode())) { 4666 startSelectionActionMode(); 4667 } 4668 mDragAcceleratorActive = false; 4669 mStartOffset = -1; 4670 mSwitchedLines = false; 4671 } 4672 break; 4673 } 4674 } 4675 4676 /** 4677 * @param event 4678 */ 4679 private void updateMinAndMaxOffsets(MotionEvent event) { 4680 int pointerCount = event.getPointerCount(); 4681 for (int index = 0; index < pointerCount; index++) { 4682 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4683 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4684 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4685 } 4686 } 4687 4688 public int getMinTouchOffset() { 4689 return mMinTouchOffset; 4690 } 4691 4692 public int getMaxTouchOffset() { 4693 return mMaxTouchOffset; 4694 } 4695 4696 public void resetTouchOffsets() { 4697 mMinTouchOffset = mMaxTouchOffset = -1; 4698 mStartOffset = -1; 4699 mDragAcceleratorActive = false; 4700 mSwitchedLines = false; 4701 } 4702 4703 /** 4704 * @return true iff this controller is currently used to move the selection start. 4705 */ 4706 public boolean isSelectionStartDragged() { 4707 return mStartHandle != null && mStartHandle.isDragging(); 4708 } 4709 4710 /** 4711 * @return true if the user is selecting text using the drag accelerator. 4712 */ 4713 public boolean isDragAcceleratorActive() { 4714 return mDragAcceleratorActive; 4715 } 4716 4717 public void onTouchModeChanged(boolean isInTouchMode) { 4718 if (!isInTouchMode) { 4719 hide(); 4720 } 4721 } 4722 4723 @Override 4724 public void onDetached() { 4725 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4726 observer.removeOnTouchModeChangeListener(this); 4727 4728 if (mStartHandle != null) mStartHandle.onDetached(); 4729 if (mEndHandle != null) mEndHandle.onDetached(); 4730 } 4731 } 4732 4733 private class CorrectionHighlighter { 4734 private final Path mPath = new Path(); 4735 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4736 private int mStart, mEnd; 4737 private long mFadingStartTime; 4738 private RectF mTempRectF; 4739 private final static int FADE_OUT_DURATION = 400; 4740 4741 public CorrectionHighlighter() { 4742 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4743 applicationScale); 4744 mPaint.setStyle(Paint.Style.FILL); 4745 } 4746 4747 public void highlight(CorrectionInfo info) { 4748 mStart = info.getOffset(); 4749 mEnd = mStart + info.getNewText().length(); 4750 mFadingStartTime = SystemClock.uptimeMillis(); 4751 4752 if (mStart < 0 || mEnd < 0) { 4753 stopAnimation(); 4754 } 4755 } 4756 4757 public void draw(Canvas canvas, int cursorOffsetVertical) { 4758 if (updatePath() && updatePaint()) { 4759 if (cursorOffsetVertical != 0) { 4760 canvas.translate(0, cursorOffsetVertical); 4761 } 4762 4763 canvas.drawPath(mPath, mPaint); 4764 4765 if (cursorOffsetVertical != 0) { 4766 canvas.translate(0, -cursorOffsetVertical); 4767 } 4768 invalidate(true); // TODO invalidate cursor region only 4769 } else { 4770 stopAnimation(); 4771 invalidate(false); // TODO invalidate cursor region only 4772 } 4773 } 4774 4775 private boolean updatePaint() { 4776 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4777 if (duration > FADE_OUT_DURATION) return false; 4778 4779 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4780 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4781 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4782 ((int) (highlightColorAlpha * coef) << 24); 4783 mPaint.setColor(color); 4784 return true; 4785 } 4786 4787 private boolean updatePath() { 4788 final Layout layout = mTextView.getLayout(); 4789 if (layout == null) return false; 4790 4791 // Update in case text is edited while the animation is run 4792 final int length = mTextView.getText().length(); 4793 int start = Math.min(length, mStart); 4794 int end = Math.min(length, mEnd); 4795 4796 mPath.reset(); 4797 layout.getSelectionPath(start, end, mPath); 4798 return true; 4799 } 4800 4801 private void invalidate(boolean delayed) { 4802 if (mTextView.getLayout() == null) return; 4803 4804 if (mTempRectF == null) mTempRectF = new RectF(); 4805 mPath.computeBounds(mTempRectF, false); 4806 4807 int left = mTextView.getCompoundPaddingLeft(); 4808 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4809 4810 if (delayed) { 4811 mTextView.postInvalidateOnAnimation( 4812 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4813 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4814 } else { 4815 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4816 (int) mTempRectF.right, (int) mTempRectF.bottom); 4817 } 4818 } 4819 4820 private void stopAnimation() { 4821 Editor.this.mCorrectionHighlighter = null; 4822 } 4823 } 4824 4825 private static class ErrorPopup extends PopupWindow { 4826 private boolean mAbove = false; 4827 private final TextView mView; 4828 private int mPopupInlineErrorBackgroundId = 0; 4829 private int mPopupInlineErrorAboveBackgroundId = 0; 4830 4831 ErrorPopup(TextView v, int width, int height) { 4832 super(v, width, height); 4833 mView = v; 4834 // Make sure the TextView has a background set as it will be used the first time it is 4835 // shown and positioned. Initialized with below background, which should have 4836 // dimensions identical to the above version for this to work (and is more likely). 4837 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4838 com.android.internal.R.styleable.Theme_errorMessageBackground); 4839 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4840 } 4841 4842 void fixDirection(boolean above) { 4843 mAbove = above; 4844 4845 if (above) { 4846 mPopupInlineErrorAboveBackgroundId = 4847 getResourceId(mPopupInlineErrorAboveBackgroundId, 4848 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4849 } else { 4850 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4851 com.android.internal.R.styleable.Theme_errorMessageBackground); 4852 } 4853 4854 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4855 mPopupInlineErrorBackgroundId); 4856 } 4857 4858 private int getResourceId(int currentId, int index) { 4859 if (currentId == 0) { 4860 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4861 R.styleable.Theme); 4862 currentId = styledAttributes.getResourceId(index, 0); 4863 styledAttributes.recycle(); 4864 } 4865 return currentId; 4866 } 4867 4868 @Override 4869 public void update(int x, int y, int w, int h, boolean force) { 4870 super.update(x, y, w, h, force); 4871 4872 boolean above = isAboveAnchor(); 4873 if (above != mAbove) { 4874 fixDirection(above); 4875 } 4876 } 4877 } 4878 4879 static class InputContentType { 4880 int imeOptions = EditorInfo.IME_NULL; 4881 String privateImeOptions; 4882 CharSequence imeActionLabel; 4883 int imeActionId; 4884 Bundle extras; 4885 OnEditorActionListener onEditorActionListener; 4886 boolean enterDown; 4887 } 4888 4889 static class InputMethodState { 4890 ExtractedTextRequest mExtractedTextRequest; 4891 final ExtractedText mExtractedText = new ExtractedText(); 4892 int mBatchEditNesting; 4893 boolean mCursorChanged; 4894 boolean mSelectionModeChanged; 4895 boolean mContentChanged; 4896 int mChangedStart, mChangedEnd, mChangedDelta; 4897 } 4898 4899 /** 4900 * @return True iff (start, end) is a valid range within the text. 4901 */ 4902 private static boolean isValidRange(CharSequence text, int start, int end) { 4903 return 0 <= start && start <= end && end <= text.length(); 4904 } 4905 4906 /** 4907 * An InputFilter that monitors text input to maintain undo history. It does not modify the 4908 * text being typed (and hence always returns null from the filter() method). 4909 */ 4910 public static class UndoInputFilter implements InputFilter { 4911 private final Editor mEditor; 4912 4913 // Whether the current filter pass is directly caused by an end-user text edit. 4914 private boolean mIsUserEdit; 4915 4916 // Whether the text field is handling an IME composition. Must be parceled in case the user 4917 // rotates the screen during composition. 4918 private boolean mHasComposition; 4919 4920 public UndoInputFilter(Editor editor) { 4921 mEditor = editor; 4922 } 4923 4924 public void saveInstanceState(Parcel parcel) { 4925 parcel.writeInt(mIsUserEdit ? 1 : 0); 4926 parcel.writeInt(mHasComposition ? 1 : 0); 4927 } 4928 4929 public void restoreInstanceState(Parcel parcel) { 4930 mIsUserEdit = parcel.readInt() != 0; 4931 mHasComposition = parcel.readInt() != 0; 4932 } 4933 4934 /** 4935 * Signals that a user-triggered edit is starting. 4936 */ 4937 public void beginBatchEdit() { 4938 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 4939 mIsUserEdit = true; 4940 } 4941 4942 public void endBatchEdit() { 4943 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 4944 mIsUserEdit = false; 4945 } 4946 4947 @Override 4948 public CharSequence filter(CharSequence source, int start, int end, 4949 Spanned dest, int dstart, int dend) { 4950 if (DEBUG_UNDO) { 4951 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 4952 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 4953 } 4954 4955 // Check to see if this edit should be tracked for undo. 4956 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 4957 return null; 4958 } 4959 4960 // Check for and handle IME composition edits. 4961 if (handleCompositionEdit(source, start, end, dstart)) { 4962 return null; 4963 } 4964 4965 // Handle keyboard edits. 4966 handleKeyboardEdit(source, start, end, dest, dstart, dend); 4967 return null; 4968 } 4969 4970 /** 4971 * Returns true iff the edit was handled, either because it should be ignored or because 4972 * this function created an undo operation for it. 4973 */ 4974 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 4975 // Ignore edits while the user is composing. 4976 if (isComposition(source)) { 4977 mHasComposition = true; 4978 return true; 4979 } 4980 final boolean hadComposition = mHasComposition; 4981 mHasComposition = false; 4982 4983 // Check for the transition out of the composing state. 4984 if (hadComposition) { 4985 // If there was no text the user canceled composition. Ignore the edit. 4986 if (start == end) { 4987 return true; 4988 } 4989 4990 // Otherwise the user inserted the composition. 4991 String newText = TextUtils.substring(source, start, end); 4992 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 4993 recordEdit(edit, false /* forceMerge */); 4994 return true; 4995 } 4996 4997 // This was neither a composition event nor a transition out of composing. 4998 return false; 4999 } 5000 5001 private void handleKeyboardEdit(CharSequence source, int start, int end, 5002 Spanned dest, int dstart, int dend) { 5003 // An application may install a TextWatcher to provide additional modifications after 5004 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5005 // string). This results in multiple filter() calls for what the user considers to be 5006 // a single operation. Always undo the whole set of changes in one step. 5007 final boolean forceMerge = isInTextWatcher(); 5008 5009 // Build a new operation with all the information from this edit. 5010 String newText = TextUtils.substring(source, start, end); 5011 String oldText = TextUtils.substring(dest, dstart, dend); 5012 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 5013 recordEdit(edit, forceMerge); 5014 } 5015 5016 /** 5017 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5018 * If forceMerge is true then the new edit is always merged. 5019 */ 5020 private void recordEdit(EditOperation edit, boolean forceMerge) { 5021 // Fetch the last edit operation and attempt to merge in the new edit. 5022 final UndoManager um = mEditor.mUndoManager; 5023 um.beginUpdate("Edit text"); 5024 EditOperation lastEdit = um.getLastOperation( 5025 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5026 if (lastEdit == null) { 5027 // Add this as the first edit. 5028 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5029 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5030 } else if (forceMerge) { 5031 // Forced merges take priority because they could be the result of a non-user-edit 5032 // change and this case should not create a new undo operation. 5033 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5034 lastEdit.forceMergeWith(edit); 5035 } else if (!mIsUserEdit) { 5036 // An application directly modified the Editable outside of a text edit. Treat this 5037 // as a new change and don't attempt to merge. 5038 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5039 um.commitState(mEditor.mUndoOwner); 5040 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5041 } else if (lastEdit.mergeWith(edit)) { 5042 // Merge succeeded, nothing else to do. 5043 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5044 } else { 5045 // Could not merge with the last edit, so commit the last edit and add this edit. 5046 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5047 um.commitState(mEditor.mUndoOwner); 5048 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5049 } 5050 um.endUpdate(); 5051 } 5052 5053 private boolean canUndoEdit(CharSequence source, int start, int end, 5054 Spanned dest, int dstart, int dend) { 5055 if (!mEditor.mAllowUndo) { 5056 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5057 return false; 5058 } 5059 5060 if (mEditor.mUndoManager.isInUndo()) { 5061 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5062 return false; 5063 } 5064 5065 // Text filters run before input operations are applied. However, some input operations 5066 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5067 // attempt to undo invalid operations. 5068 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5069 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5070 return false; 5071 } 5072 5073 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5074 // on an input field. Skip no-op changes. 5075 if (start == end && dstart == dend) { 5076 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5077 return false; 5078 } 5079 5080 return true; 5081 } 5082 5083 private boolean isComposition(CharSequence source) { 5084 if (!(source instanceof Spannable)) { 5085 return false; 5086 } 5087 // This is a composition edit if the source has a non-zero-length composing span. 5088 Spannable text = (Spannable) source; 5089 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 5090 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 5091 return composeBegin < composeEnd; 5092 } 5093 5094 private boolean isInTextWatcher() { 5095 CharSequence text = mEditor.mTextView.getText(); 5096 return (text instanceof SpannableStringBuilder) 5097 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 5098 } 5099 } 5100 5101 /** 5102 * An operation to undo a single "edit" to a text view. 5103 */ 5104 public static class EditOperation extends UndoOperation<Editor> { 5105 private static final int TYPE_INSERT = 0; 5106 private static final int TYPE_DELETE = 1; 5107 private static final int TYPE_REPLACE = 2; 5108 5109 private int mType; 5110 private String mOldText; 5111 private int mOldTextStart; 5112 private String mNewText; 5113 private int mNewTextStart; 5114 5115 private int mOldCursorPos; 5116 private int mNewCursorPos; 5117 5118 /** 5119 * Constructs an edit operation from a text input operation on editor that replaces the 5120 * oldText starting at dstart with newText. 5121 */ 5122 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 5123 super(editor.mUndoOwner); 5124 mOldText = oldText; 5125 mNewText = newText; 5126 5127 // Determine the type of the edit and store where it occurred. Avoid storing 5128 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 5129 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 5130 // outside the bounds of the final text). 5131 if (mNewText.length() > 0 && mOldText.length() == 0) { 5132 mType = TYPE_INSERT; 5133 mNewTextStart = dstart; 5134 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 5135 mType = TYPE_DELETE; 5136 mOldTextStart = dstart; 5137 } else { 5138 mType = TYPE_REPLACE; 5139 mOldTextStart = mNewTextStart = dstart; 5140 } 5141 5142 // Store cursor data. 5143 mOldCursorPos = editor.mTextView.getSelectionStart(); 5144 mNewCursorPos = dstart + mNewText.length(); 5145 } 5146 5147 public EditOperation(Parcel src, ClassLoader loader) { 5148 super(src, loader); 5149 mType = src.readInt(); 5150 mOldText = src.readString(); 5151 mOldTextStart = src.readInt(); 5152 mNewText = src.readString(); 5153 mNewTextStart = src.readInt(); 5154 mOldCursorPos = src.readInt(); 5155 mNewCursorPos = src.readInt(); 5156 } 5157 5158 @Override 5159 public void writeToParcel(Parcel dest, int flags) { 5160 dest.writeInt(mType); 5161 dest.writeString(mOldText); 5162 dest.writeInt(mOldTextStart); 5163 dest.writeString(mNewText); 5164 dest.writeInt(mNewTextStart); 5165 dest.writeInt(mOldCursorPos); 5166 dest.writeInt(mNewCursorPos); 5167 } 5168 5169 private int getNewTextEnd() { 5170 return mNewTextStart + mNewText.length(); 5171 } 5172 5173 private int getOldTextEnd() { 5174 return mOldTextStart + mOldText.length(); 5175 } 5176 5177 @Override 5178 public void commit() { 5179 } 5180 5181 @Override 5182 public void undo() { 5183 if (DEBUG_UNDO) Log.d(TAG, "undo"); 5184 // Remove the new text and insert the old. 5185 Editor editor = getOwnerData(); 5186 Editable text = (Editable) editor.mTextView.getText(); 5187 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5188 mOldCursorPos); 5189 } 5190 5191 @Override 5192 public void redo() { 5193 if (DEBUG_UNDO) Log.d(TAG, "redo"); 5194 // Remove the old text and insert the new. 5195 Editor editor = getOwnerData(); 5196 Editable text = (Editable) editor.mTextView.getText(); 5197 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 5198 mNewCursorPos); 5199 } 5200 5201 /** 5202 * Attempts to merge this existing operation with a new edit. 5203 * @param edit The new edit operation. 5204 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 5205 * object unchanged. 5206 */ 5207 private boolean mergeWith(EditOperation edit) { 5208 if (DEBUG_UNDO) { 5209 Log.d(TAG, "mergeWith old " + this); 5210 Log.d(TAG, "mergeWith new " + edit); 5211 } 5212 switch (mType) { 5213 case TYPE_INSERT: 5214 return mergeInsertWith(edit); 5215 case TYPE_DELETE: 5216 return mergeDeleteWith(edit); 5217 case TYPE_REPLACE: 5218 return mergeReplaceWith(edit); 5219 default: 5220 return false; 5221 } 5222 } 5223 5224 private boolean mergeInsertWith(EditOperation edit) { 5225 // Only merge continuous insertions. 5226 if (edit.mType != TYPE_INSERT) { 5227 return false; 5228 } 5229 // Only merge insertions that are contiguous. 5230 if (getNewTextEnd() != edit.mNewTextStart) { 5231 return false; 5232 } 5233 mNewText += edit.mNewText; 5234 mNewCursorPos = edit.mNewCursorPos; 5235 return true; 5236 } 5237 5238 // TODO: Support forward delete. 5239 private boolean mergeDeleteWith(EditOperation edit) { 5240 // Only merge continuous deletes. 5241 if (edit.mType != TYPE_DELETE) { 5242 return false; 5243 } 5244 // Only merge deletions that are contiguous. 5245 if (mOldTextStart != edit.getOldTextEnd()) { 5246 return false; 5247 } 5248 mOldTextStart = edit.mOldTextStart; 5249 mOldText = edit.mOldText + mOldText; 5250 mNewCursorPos = edit.mNewCursorPos; 5251 return true; 5252 } 5253 5254 private boolean mergeReplaceWith(EditOperation edit) { 5255 // Replacements can merge only with adjacent inserts. 5256 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5257 return false; 5258 } 5259 mOldText += edit.mOldText; 5260 mNewText += edit.mNewText; 5261 mNewCursorPos = edit.mNewCursorPos; 5262 return true; 5263 } 5264 5265 /** 5266 * Forcibly creates a single merged edit operation by simulating the entire text 5267 * contents being replaced. 5268 */ 5269 public void forceMergeWith(EditOperation edit) { 5270 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5271 Editor editor = getOwnerData(); 5272 5273 // Copy the text of the current field. 5274 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5275 // but would require two parallel implementations of modifyText() because Editable and 5276 // StringBuilder do not share an interface for replace/delete/insert. 5277 Editable editable = (Editable) editor.mTextView.getText(); 5278 Editable originalText = new SpannableStringBuilder(editable.toString()); 5279 5280 // Roll back the last operation. 5281 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5282 mOldCursorPos); 5283 5284 // Clone the text again and apply the new operation. 5285 Editable finalText = new SpannableStringBuilder(editable.toString()); 5286 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5287 edit.mNewTextStart, edit.mNewCursorPos); 5288 5289 // Convert this operation into a non-mergeable replacement of the entire string. 5290 mType = TYPE_REPLACE; 5291 mNewText = finalText.toString(); 5292 mNewTextStart = 0; 5293 mOldText = originalText.toString(); 5294 mOldTextStart = 0; 5295 mNewCursorPos = edit.mNewCursorPos; 5296 // mOldCursorPos is unchanged. 5297 } 5298 5299 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5300 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5301 // Apply the edit if it is still valid. 5302 if (isValidRange(text, deleteFrom, deleteTo) && 5303 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5304 if (deleteFrom != deleteTo) { 5305 text.delete(deleteFrom, deleteTo); 5306 } 5307 if (newText.length() != 0) { 5308 text.insert(newTextInsertAt, newText); 5309 } 5310 } 5311 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5312 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5313 // TODO: Select all the text that was undone. 5314 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5315 Selection.setSelection(text, newCursorPos); 5316 } 5317 } 5318 5319 private String getTypeString() { 5320 switch (mType) { 5321 case TYPE_INSERT: 5322 return "insert"; 5323 case TYPE_DELETE: 5324 return "delete"; 5325 case TYPE_REPLACE: 5326 return "replace"; 5327 default: 5328 return ""; 5329 } 5330 } 5331 5332 @Override 5333 public String toString() { 5334 return "[mType=" + getTypeString() + ", " + 5335 "mOldText=" + mOldText + ", " + 5336 "mOldTextStart=" + mOldTextStart + ", " + 5337 "mNewText=" + mNewText + ", " + 5338 "mNewTextStart=" + mNewTextStart + ", " + 5339 "mOldCursorPos=" + mOldCursorPos + ", " + 5340 "mNewCursorPos=" + mNewCursorPos + "]"; 5341 } 5342 5343 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5344 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5345 @Override 5346 public EditOperation createFromParcel(Parcel in) { 5347 return new EditOperation(in, null); 5348 } 5349 5350 @Override 5351 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5352 return new EditOperation(in, loader); 5353 } 5354 5355 @Override 5356 public EditOperation[] newArray(int size) { 5357 return new EditOperation[size]; 5358 } 5359 }; 5360 } 5361} 5362