Editor.java revision 29f37e15975dec1fbb519398e5e80b16d61a5d0c
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 private static final int UNSET_X_VALUE = -1; 127 // Tag used when the Editor maintains its own separate UndoManager. 128 private static final String UNDO_OWNER_TAG = "Editor"; 129 130 // Ordering constants used to place the Action Mode items in their menu. 131 private static final int MENU_ITEM_ORDER_CUT = 1; 132 private static final int MENU_ITEM_ORDER_COPY = 2; 133 private static final int MENU_ITEM_ORDER_PASTE = 3; 134 private static final int MENU_ITEM_ORDER_SHARE = 4; 135 private static final int MENU_ITEM_ORDER_SELECT_ALL = 5; 136 private static final int MENU_ITEM_ORDER_REPLACE = 6; 137 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 10; 138 139 // Each Editor manages its own undo stack. 140 private final UndoManager mUndoManager = new UndoManager(); 141 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 142 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 143 boolean mAllowUndo = true; 144 145 // Cursor Controllers. 146 InsertionPointCursorController mInsertionPointCursorController; 147 SelectionModifierCursorController mSelectionModifierCursorController; 148 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 149 ActionMode mTextActionMode; 150 boolean mInsertionControllerEnabled; 151 boolean mSelectionControllerEnabled; 152 153 // Used to highlight a word when it is corrected by the IME 154 CorrectionHighlighter mCorrectionHighlighter; 155 156 InputContentType mInputContentType; 157 InputMethodState mInputMethodState; 158 159 private static class TextRenderNode { 160 RenderNode renderNode; 161 boolean isDirty; 162 public TextRenderNode(String name) { 163 isDirty = true; 164 renderNode = RenderNode.create(name, null); 165 } 166 boolean needsRecord() { return isDirty || !renderNode.isValid(); } 167 } 168 TextRenderNode[] mTextRenderNodes; 169 170 boolean mFrozenWithFocus; 171 boolean mSelectionMoved; 172 boolean mTouchFocusSelected; 173 174 KeyListener mKeyListener; 175 int mInputType = EditorInfo.TYPE_NULL; 176 177 boolean mDiscardNextActionUp; 178 boolean mIgnoreActionUpEvent; 179 180 long mShowCursor; 181 Blink mBlink; 182 183 boolean mCursorVisible = true; 184 boolean mSelectAllOnFocus; 185 boolean mTextIsSelectable; 186 187 CharSequence mError; 188 boolean mErrorWasChanged; 189 ErrorPopup mErrorPopup; 190 191 /** 192 * This flag is set if the TextView tries to display an error before it 193 * is attached to the window (so its position is still unknown). 194 * It causes the error to be shown later, when onAttachedToWindow() 195 * is called. 196 */ 197 boolean mShowErrorAfterAttach; 198 199 boolean mInBatchEditControllers; 200 boolean mShowSoftInputOnFocus = true; 201 boolean mPreserveDetachedSelection; 202 boolean mTemporaryDetach; 203 204 SuggestionsPopupWindow mSuggestionsPopupWindow; 205 SuggestionRangeSpan mSuggestionRangeSpan; 206 Runnable mShowSuggestionRunnable; 207 208 final Drawable[] mCursorDrawable = new Drawable[2]; 209 int mCursorCount; // Current number of used mCursorDrawable: 0 (resource=0), 1 or 2 (split) 210 211 private Drawable mSelectHandleLeft; 212 private Drawable mSelectHandleRight; 213 private Drawable mSelectHandleCenter; 214 215 // Global listener that detects changes in the global position of the TextView 216 private PositionListener mPositionListener; 217 218 float mLastDownPositionX, mLastDownPositionY; 219 Callback mCustomSelectionActionModeCallback; 220 Callback mCustomInsertionActionModeCallback; 221 222 // Set when this TextView gained focus with some text selected. Will start selection mode. 223 boolean mCreatedWithASelection; 224 225 boolean mDoubleTap = false; 226 227 private Runnable mInsertionActionModeRunnable; 228 229 // The span controller helps monitoring the changes to which the Editor needs to react: 230 // - EasyEditSpans, for which we have some UI to display on attach and on hide 231 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 232 private SpanController mSpanController; 233 234 WordIterator mWordIterator; 235 SpellChecker mSpellChecker; 236 237 // This word iterator is set with text and used to determine word boundaries 238 // when a user is selecting text. 239 private WordIterator mWordIteratorWithText; 240 // Indicate that the text in the word iterator needs to be updated. 241 private boolean mUpdateWordIteratorText; 242 243 private Rect mTempRect; 244 245 private TextView mTextView; 246 247 final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = new CursorAnchorInfoNotifier(); 248 249 private final Runnable mShowFloatingToolbar = new Runnable() { 250 @Override 251 public void run() { 252 if (mTextActionMode != null) { 253 mTextActionMode.hide(0); // hide off. 254 } 255 } 256 }; 257 258 boolean mIsInsertionActionModeStartPending = false; 259 260 Editor(TextView textView) { 261 mTextView = textView; 262 // Synchronize the filter list, which places the undo input filter at the end. 263 mTextView.setFilters(mTextView.getFilters()); 264 } 265 266 ParcelableParcel saveInstanceState() { 267 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 268 Parcel parcel = state.getParcel(); 269 mUndoManager.saveInstanceState(parcel); 270 mUndoInputFilter.saveInstanceState(parcel); 271 return state; 272 } 273 274 void restoreInstanceState(ParcelableParcel state) { 275 Parcel parcel = state.getParcel(); 276 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 277 mUndoInputFilter.restoreInstanceState(parcel); 278 // Re-associate this object as the owner of undo state. 279 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 280 } 281 282 /** 283 * Forgets all undo and redo operations for this Editor. 284 */ 285 void forgetUndoRedo() { 286 UndoOwner[] owners = { mUndoOwner }; 287 mUndoManager.forgetUndos(owners, -1 /* all */); 288 mUndoManager.forgetRedos(owners, -1 /* all */); 289 } 290 291 boolean canUndo() { 292 UndoOwner[] owners = { mUndoOwner }; 293 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 294 } 295 296 boolean canRedo() { 297 UndoOwner[] owners = { mUndoOwner }; 298 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 299 } 300 301 void undo() { 302 if (!mAllowUndo) { 303 return; 304 } 305 UndoOwner[] owners = { mUndoOwner }; 306 mUndoManager.undo(owners, 1); // Undo 1 action. 307 } 308 309 void redo() { 310 if (!mAllowUndo) { 311 return; 312 } 313 UndoOwner[] owners = { mUndoOwner }; 314 mUndoManager.redo(owners, 1); // Redo 1 action. 315 } 316 317 void replace() { 318 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 319 stopTextActionMode(); 320 Selection.setSelection((Spannable) mTextView.getText(), middle); 321 showSuggestions(); 322 } 323 324 void onAttachedToWindow() { 325 if (mShowErrorAfterAttach) { 326 showError(); 327 mShowErrorAfterAttach = false; 328 } 329 mTemporaryDetach = false; 330 331 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 332 // No need to create the controller. 333 // The get method will add the listener on controller creation. 334 if (mInsertionPointCursorController != null) { 335 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 336 } 337 if (mSelectionModifierCursorController != null) { 338 mSelectionModifierCursorController.resetTouchOffsets(); 339 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 340 } 341 updateSpellCheckSpans(0, mTextView.getText().length(), 342 true /* create the spell checker if needed */); 343 344 if (mTextView.hasTransientState() && 345 mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 346 // Since transient state is reference counted make sure it stays matched 347 // with our own calls to it for managing selection. 348 // The action mode callback will set this back again when/if the action mode starts. 349 mTextView.setHasTransientState(false); 350 351 // We had an active selection from before, start the selection mode. 352 startSelectionActionMode(); 353 } 354 355 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 356 resumeBlink(); 357 } 358 359 void onDetachedFromWindow() { 360 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 361 362 if (mError != null) { 363 hideError(); 364 } 365 366 suspendBlink(); 367 368 if (mInsertionPointCursorController != null) { 369 mInsertionPointCursorController.onDetached(); 370 } 371 372 if (mSelectionModifierCursorController != null) { 373 mSelectionModifierCursorController.onDetached(); 374 } 375 376 if (mShowSuggestionRunnable != null) { 377 mTextView.removeCallbacks(mShowSuggestionRunnable); 378 } 379 380 // Cancel the single tap delayed runnable. 381 if (mInsertionActionModeRunnable != null) { 382 mTextView.removeCallbacks(mInsertionActionModeRunnable); 383 } 384 385 mTextView.removeCallbacks(mShowFloatingToolbar); 386 387 destroyDisplayListsData(); 388 389 if (mSpellChecker != null) { 390 mSpellChecker.closeSession(); 391 // Forces the creation of a new SpellChecker next time this window is created. 392 // Will handle the cases where the settings has been changed in the meantime. 393 mSpellChecker = null; 394 } 395 396 mPreserveDetachedSelection = true; 397 hideCursorAndSpanControllers(); 398 stopTextActionMode(); 399 mPreserveDetachedSelection = false; 400 mTemporaryDetach = false; 401 } 402 403 private void destroyDisplayListsData() { 404 if (mTextRenderNodes != null) { 405 for (int i = 0; i < mTextRenderNodes.length; i++) { 406 RenderNode displayList = mTextRenderNodes[i] != null 407 ? mTextRenderNodes[i].renderNode : null; 408 if (displayList != null && displayList.isValid()) { 409 displayList.destroyDisplayListData(); 410 } 411 } 412 } 413 } 414 415 private void showError() { 416 if (mTextView.getWindowToken() == null) { 417 mShowErrorAfterAttach = true; 418 return; 419 } 420 421 if (mErrorPopup == null) { 422 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 423 final TextView err = (TextView) inflater.inflate( 424 com.android.internal.R.layout.textview_hint, null); 425 426 final float scale = mTextView.getResources().getDisplayMetrics().density; 427 mErrorPopup = new ErrorPopup(err, (int)(200 * scale + 0.5f), (int)(50 * scale + 0.5f)); 428 mErrorPopup.setFocusable(false); 429 // The user is entering text, so the input method is needed. We 430 // don't want the popup to be displayed on top of it. 431 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 432 } 433 434 TextView tv = (TextView) mErrorPopup.getContentView(); 435 chooseSize(mErrorPopup, mError, tv); 436 tv.setText(mError); 437 438 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY()); 439 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 440 } 441 442 public void setError(CharSequence error, Drawable icon) { 443 mError = TextUtils.stringOrSpannedString(error); 444 mErrorWasChanged = true; 445 446 if (mError == null) { 447 setErrorIcon(null); 448 if (mErrorPopup != null) { 449 if (mErrorPopup.isShowing()) { 450 mErrorPopup.dismiss(); 451 } 452 453 mErrorPopup = null; 454 } 455 mShowErrorAfterAttach = false; 456 } else { 457 setErrorIcon(icon); 458 if (mTextView.isFocused()) { 459 showError(); 460 } 461 } 462 } 463 464 private void setErrorIcon(Drawable icon) { 465 Drawables dr = mTextView.mDrawables; 466 if (dr == null) { 467 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 468 } 469 dr.setErrorDrawable(icon, mTextView); 470 471 mTextView.resetResolvedDrawables(); 472 mTextView.invalidate(); 473 mTextView.requestLayout(); 474 } 475 476 private void hideError() { 477 if (mErrorPopup != null) { 478 if (mErrorPopup.isShowing()) { 479 mErrorPopup.dismiss(); 480 } 481 } 482 483 mShowErrorAfterAttach = false; 484 } 485 486 /** 487 * Returns the X offset to make the pointy top of the error point 488 * at the middle of the error icon. 489 */ 490 private int getErrorX() { 491 /* 492 * The "25" is the distance between the point and the right edge 493 * of the background 494 */ 495 final float scale = mTextView.getResources().getDisplayMetrics().density; 496 497 final Drawables dr = mTextView.mDrawables; 498 499 final int layoutDirection = mTextView.getLayoutDirection(); 500 int errorX; 501 int offset; 502 switch (layoutDirection) { 503 default: 504 case View.LAYOUT_DIRECTION_LTR: 505 offset = - (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 506 errorX = mTextView.getWidth() - mErrorPopup.getWidth() - 507 mTextView.getPaddingRight() + offset; 508 break; 509 case View.LAYOUT_DIRECTION_RTL: 510 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 511 errorX = mTextView.getPaddingLeft() + offset; 512 break; 513 } 514 return errorX; 515 } 516 517 /** 518 * Returns the Y offset to make the pointy top of the error point 519 * at the bottom of the error icon. 520 */ 521 private int getErrorY() { 522 /* 523 * Compound, not extended, because the icon is not clipped 524 * if the text height is smaller. 525 */ 526 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 527 int vspace = mTextView.getBottom() - mTextView.getTop() - 528 mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 529 530 final Drawables dr = mTextView.mDrawables; 531 532 final int layoutDirection = mTextView.getLayoutDirection(); 533 int height; 534 switch (layoutDirection) { 535 default: 536 case View.LAYOUT_DIRECTION_LTR: 537 height = (dr != null ? dr.mDrawableHeightRight : 0); 538 break; 539 case View.LAYOUT_DIRECTION_RTL: 540 height = (dr != null ? dr.mDrawableHeightLeft : 0); 541 break; 542 } 543 544 int icontop = compoundPaddingTop + (vspace - height) / 2; 545 546 /* 547 * The "2" is the distance between the point and the top edge 548 * of the background. 549 */ 550 final float scale = mTextView.getResources().getDisplayMetrics().density; 551 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 552 } 553 554 void createInputContentTypeIfNeeded() { 555 if (mInputContentType == null) { 556 mInputContentType = new InputContentType(); 557 } 558 } 559 560 void createInputMethodStateIfNeeded() { 561 if (mInputMethodState == null) { 562 mInputMethodState = new InputMethodState(); 563 } 564 } 565 566 boolean isCursorVisible() { 567 // The default value is true, even when there is no associated Editor 568 return mCursorVisible && mTextView.isTextEditable(); 569 } 570 571 void prepareCursorControllers() { 572 boolean windowSupportsHandles = false; 573 574 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 575 if (params instanceof WindowManager.LayoutParams) { 576 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 577 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 578 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 579 } 580 581 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 582 mInsertionControllerEnabled = enabled && isCursorVisible(); 583 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 584 585 if (!mInsertionControllerEnabled) { 586 hideInsertionPointCursorController(); 587 if (mInsertionPointCursorController != null) { 588 mInsertionPointCursorController.onDetached(); 589 mInsertionPointCursorController = null; 590 } 591 } 592 593 if (!mSelectionControllerEnabled) { 594 stopTextActionMode(); 595 if (mSelectionModifierCursorController != null) { 596 mSelectionModifierCursorController.onDetached(); 597 mSelectionModifierCursorController = null; 598 } 599 } 600 } 601 602 void hideInsertionPointCursorController() { 603 if (mInsertionPointCursorController != null) { 604 mInsertionPointCursorController.hide(); 605 } 606 } 607 608 /** 609 * Hides the insertion and span controllers. 610 */ 611 void hideCursorAndSpanControllers() { 612 hideCursorControllers(); 613 hideSpanControllers(); 614 } 615 616 private void hideSpanControllers() { 617 if (mSpanController != null) { 618 mSpanController.hide(); 619 } 620 } 621 622 private void hideCursorControllers() { 623 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 624 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 625 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 626 // to distinguish one from the other. 627 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) || 628 !mSuggestionsPopupWindow.isShowingUp())) { 629 // Should be done before hide insertion point controller since it triggers a show of it 630 mSuggestionsPopupWindow.hide(); 631 } 632 hideInsertionPointCursorController(); 633 } 634 635 /** 636 * Create new SpellCheckSpans on the modified region. 637 */ 638 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 639 // Remove spans whose adjacent characters are text not punctuation 640 mTextView.removeAdjacentSuggestionSpans(start); 641 mTextView.removeAdjacentSuggestionSpans(end); 642 643 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() && 644 !(mTextView.isInExtractedMode())) { 645 if (mSpellChecker == null && createSpellChecker) { 646 mSpellChecker = new SpellChecker(mTextView); 647 } 648 if (mSpellChecker != null) { 649 mSpellChecker.spellCheck(start, end); 650 } 651 } 652 } 653 654 void onScreenStateChanged(int screenState) { 655 switch (screenState) { 656 case View.SCREEN_STATE_ON: 657 resumeBlink(); 658 break; 659 case View.SCREEN_STATE_OFF: 660 suspendBlink(); 661 break; 662 } 663 } 664 665 private void suspendBlink() { 666 if (mBlink != null) { 667 mBlink.cancel(); 668 } 669 } 670 671 private void resumeBlink() { 672 if (mBlink != null) { 673 mBlink.uncancel(); 674 makeBlink(); 675 } 676 } 677 678 void adjustInputType(boolean password, boolean passwordInputType, 679 boolean webPasswordInputType, boolean numberPasswordInputType) { 680 // mInputType has been set from inputType, possibly modified by mInputMethod. 681 // Specialize mInputType to [web]password if we have a text class and the original input 682 // type was a password. 683 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 684 if (password || passwordInputType) { 685 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 686 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 687 } 688 if (webPasswordInputType) { 689 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 690 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 691 } 692 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 693 if (numberPasswordInputType) { 694 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 695 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 696 } 697 } 698 } 699 700 private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) { 701 int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 702 int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 703 704 int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 705 com.android.internal.R.dimen.textview_error_popup_default_width); 706 Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels, 707 Layout.Alignment.ALIGN_NORMAL, 1, 0, true); 708 float max = 0; 709 for (int i = 0; i < l.getLineCount(); i++) { 710 max = Math.max(max, l.getLineWidth(i)); 711 } 712 713 /* 714 * Now set the popup size to be big enough for the text plus the border capped 715 * to DEFAULT_MAX_POPUP_WIDTH 716 */ 717 pop.setWidth(wid + (int) Math.ceil(max)); 718 pop.setHeight(ht + l.getHeight()); 719 } 720 721 void setFrame() { 722 if (mErrorPopup != null) { 723 TextView tv = (TextView) mErrorPopup.getContentView(); 724 chooseSize(mErrorPopup, mError, tv); 725 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 726 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 727 } 728 } 729 730 private int getWordStart(int offset) { 731 // FIXME - For this and similar methods we're not doing anything to check if there's 732 // a LocaleSpan in the text, this may be something we should try handling or checking for. 733 int retOffset = getWordIteratorWithText().prevBoundary(offset); 734 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 735 // On punctuation boundary or within group of punctuation, find punctuation start. 736 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 737 } else { 738 // Not on a punctuation boundary, find the word start. 739 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 740 } 741 if (retOffset == BreakIterator.DONE) { 742 return offset; 743 } 744 return retOffset; 745 } 746 747 private int getWordEnd(int offset) { 748 int retOffset = getWordIteratorWithText().nextBoundary(offset); 749 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 750 // On punctuation boundary or within group of punctuation, find punctuation end. 751 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 752 } else { 753 // Not on a punctuation boundary, find the word end. 754 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 755 } 756 if (retOffset == BreakIterator.DONE) { 757 return offset; 758 } 759 return retOffset; 760 } 761 762 /** 763 * Adjusts selection to the word under last touch offset. Return true if the operation was 764 * successfully performed. 765 */ 766 private boolean selectCurrentWord() { 767 if (!mTextView.canSelectText()) { 768 return false; 769 } 770 771 if (mTextView.hasPasswordTransformationMethod()) { 772 // Always select all on a password field. 773 // Cut/copy menu entries are not available for passwords, but being able to select all 774 // is however useful to delete or paste to replace the entire content. 775 return mTextView.selectAllText(); 776 } 777 778 int inputType = mTextView.getInputType(); 779 int klass = inputType & InputType.TYPE_MASK_CLASS; 780 int variation = inputType & InputType.TYPE_MASK_VARIATION; 781 782 // Specific text field types: select the entire text for these 783 if (klass == InputType.TYPE_CLASS_NUMBER || 784 klass == InputType.TYPE_CLASS_PHONE || 785 klass == InputType.TYPE_CLASS_DATETIME || 786 variation == InputType.TYPE_TEXT_VARIATION_URI || 787 variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS || 788 variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS || 789 variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 790 return mTextView.selectAllText(); 791 } 792 793 long lastTouchOffsets = getLastTouchOffsets(); 794 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 795 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 796 797 // Safety check in case standard touch event handling has been bypassed 798 if (minOffset < 0 || minOffset >= mTextView.getText().length()) return false; 799 if (maxOffset < 0 || maxOffset >= mTextView.getText().length()) return false; 800 801 int selectionStart, selectionEnd; 802 803 // If a URLSpan (web address, email, phone...) is found at that position, select it. 804 URLSpan[] urlSpans = ((Spanned) mTextView.getText()). 805 getSpans(minOffset, maxOffset, URLSpan.class); 806 if (urlSpans.length >= 1) { 807 URLSpan urlSpan = urlSpans[0]; 808 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 809 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 810 } else { 811 // FIXME - We should check if there's a LocaleSpan in the text, this may be 812 // something we should try handling or checking for. 813 final WordIterator wordIterator = getWordIterator(); 814 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 815 816 selectionStart = wordIterator.getBeginning(minOffset); 817 selectionEnd = wordIterator.getEnd(maxOffset); 818 819 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE || 820 selectionStart == selectionEnd) { 821 // Possible when the word iterator does not properly handle the text's language 822 long range = getCharClusterRange(minOffset); 823 selectionStart = TextUtils.unpackRangeStartFromLong(range); 824 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 825 } 826 } 827 828 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 829 return selectionEnd > selectionStart; 830 } 831 832 void onLocaleChanged() { 833 // Will be re-created on demand in getWordIterator with the proper new locale 834 mWordIterator = null; 835 mWordIteratorWithText = null; 836 } 837 838 /** 839 * @hide 840 */ 841 public WordIterator getWordIterator() { 842 if (mWordIterator == null) { 843 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 844 } 845 return mWordIterator; 846 } 847 848 private WordIterator getWordIteratorWithText() { 849 if (mWordIteratorWithText == null) { 850 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 851 mUpdateWordIteratorText = true; 852 } 853 if (mUpdateWordIteratorText) { 854 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 855 // to the user's selection is needed. A possible solution would be to 856 // copy some number N of characters near the selection and then when the 857 // user approaches N then we'd do another copy of the next N characters. 858 CharSequence text = mTextView.getText(); 859 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 860 mUpdateWordIteratorText = false; 861 } 862 return mWordIteratorWithText; 863 } 864 865 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 866 final Layout layout = mTextView.getLayout(); 867 if (layout == null) return offset; 868 final CharSequence text = mTextView.getText(); 869 final int nextOffset = layout.getPaint().getTextRunCursor(text, 0, text.length(), 870 layout.isRtlCharAt(offset) ? Paint.DIRECTION_RTL : Paint.DIRECTION_LTR, 871 offset, findAfterGivenOffset ? Paint.CURSOR_AFTER : Paint.CURSOR_BEFORE); 872 return nextOffset == -1 ? offset : nextOffset; 873 } 874 875 private long getCharClusterRange(int offset) { 876 final int textLength = mTextView.getText().length(); 877 if (offset < textLength) { 878 return TextUtils.packRangeInLong(offset, getNextCursorOffset(offset, true)); 879 } 880 if (offset - 1 >= 0) { 881 return TextUtils.packRangeInLong(getNextCursorOffset(offset, false), offset); 882 } 883 return TextUtils.packRangeInLong(offset, offset); 884 } 885 886 private boolean touchPositionIsInSelection() { 887 int selectionStart = mTextView.getSelectionStart(); 888 int selectionEnd = mTextView.getSelectionEnd(); 889 890 if (selectionStart == selectionEnd) { 891 return false; 892 } 893 894 if (selectionStart > selectionEnd) { 895 int tmp = selectionStart; 896 selectionStart = selectionEnd; 897 selectionEnd = tmp; 898 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 899 } 900 901 SelectionModifierCursorController selectionController = getSelectionController(); 902 int minOffset = selectionController.getMinTouchOffset(); 903 int maxOffset = selectionController.getMaxTouchOffset(); 904 905 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 906 } 907 908 private PositionListener getPositionListener() { 909 if (mPositionListener == null) { 910 mPositionListener = new PositionListener(); 911 } 912 return mPositionListener; 913 } 914 915 private interface TextViewPositionListener { 916 public void updatePosition(int parentPositionX, int parentPositionY, 917 boolean parentPositionChanged, boolean parentScrolled); 918 } 919 920 private boolean isPositionVisible(final float positionX, final float positionY) { 921 synchronized (TEMP_POSITION) { 922 final float[] position = TEMP_POSITION; 923 position[0] = positionX; 924 position[1] = positionY; 925 View view = mTextView; 926 927 while (view != null) { 928 if (view != mTextView) { 929 // Local scroll is already taken into account in positionX/Y 930 position[0] -= view.getScrollX(); 931 position[1] -= view.getScrollY(); 932 } 933 934 if (position[0] < 0 || position[1] < 0 || 935 position[0] > view.getWidth() || position[1] > view.getHeight()) { 936 return false; 937 } 938 939 if (!view.getMatrix().isIdentity()) { 940 view.getMatrix().mapPoints(position); 941 } 942 943 position[0] += view.getLeft(); 944 position[1] += view.getTop(); 945 946 final ViewParent parent = view.getParent(); 947 if (parent instanceof View) { 948 view = (View) parent; 949 } else { 950 // We've reached the ViewRoot, stop iterating 951 view = null; 952 } 953 } 954 } 955 956 // We've been able to walk up the view hierarchy and the position was never clipped 957 return true; 958 } 959 960 private boolean isOffsetVisible(int offset) { 961 Layout layout = mTextView.getLayout(); 962 if (layout == null) return false; 963 964 final int line = layout.getLineForOffset(offset); 965 final int lineBottom = layout.getLineBottom(line); 966 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 967 return isPositionVisible(primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 968 lineBottom + mTextView.viewportToContentVerticalOffset()); 969 } 970 971 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 972 * in the view. Returns false when the position is in the empty space of left/right of text. 973 */ 974 private boolean isPositionOnText(float x, float y) { 975 Layout layout = mTextView.getLayout(); 976 if (layout == null) return false; 977 978 final int line = mTextView.getLineAtCoordinate(y); 979 x = mTextView.convertToLocalHorizontalCoordinate(x); 980 981 if (x < layout.getLineLeft(line)) return false; 982 if (x > layout.getLineRight(line)) return false; 983 return true; 984 } 985 986 public boolean performLongClick(boolean handled) { 987 // Long press in empty space moves cursor and starts the insertion action mode. 988 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) && 989 mInsertionControllerEnabled) { 990 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 991 mLastDownPositionY); 992 stopTextActionMode(); 993 Selection.setSelection((Spannable) mTextView.getText(), offset); 994 getInsertionController().show(); 995 mIsInsertionActionModeStartPending = true; 996 handled = true; 997 } 998 999 if (!handled && mTextActionMode != null) { 1000 if (touchPositionIsInSelection()) { 1001 // Start a drag 1002 final int start = mTextView.getSelectionStart(); 1003 final int end = mTextView.getSelectionEnd(); 1004 CharSequence selectedText = mTextView.getTransformedText(start, end); 1005 ClipData data = ClipData.newPlainText(null, selectedText); 1006 DragLocalState localState = new DragLocalState(mTextView, start, end); 1007 mTextView.startDrag(data, getTextThumbnailBuilder(selectedText), localState, 1008 View.DRAG_FLAG_GLOBAL); 1009 stopTextActionMode(); 1010 } else { 1011 stopTextActionMode(); 1012 selectCurrentWordAndStartDrag(); 1013 } 1014 handled = true; 1015 } 1016 1017 // Start a new selection 1018 if (!handled) { 1019 handled = selectCurrentWordAndStartDrag(); 1020 } 1021 1022 return handled; 1023 } 1024 1025 private long getLastTouchOffsets() { 1026 SelectionModifierCursorController selectionController = getSelectionController(); 1027 final int minOffset = selectionController.getMinTouchOffset(); 1028 final int maxOffset = selectionController.getMaxTouchOffset(); 1029 return TextUtils.packRangeInLong(minOffset, maxOffset); 1030 } 1031 1032 void onFocusChanged(boolean focused, int direction) { 1033 mShowCursor = SystemClock.uptimeMillis(); 1034 ensureEndedBatchEdit(); 1035 1036 if (focused) { 1037 int selStart = mTextView.getSelectionStart(); 1038 int selEnd = mTextView.getSelectionEnd(); 1039 1040 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1041 // mode for these, unless there was a specific selection already started. 1042 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 && 1043 selEnd == mTextView.getText().length(); 1044 1045 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() && 1046 !isFocusHighlighted; 1047 1048 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1049 // If a tap was used to give focus to that view, move cursor at tap position. 1050 // Has to be done before onTakeFocus, which can be overloaded. 1051 final int lastTapPosition = getLastTapPosition(); 1052 if (lastTapPosition >= 0) { 1053 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1054 } 1055 1056 // Note this may have to be moved out of the Editor class 1057 MovementMethod mMovement = mTextView.getMovementMethod(); 1058 if (mMovement != null) { 1059 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1060 } 1061 1062 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1063 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1064 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1065 // This special case ensure that we keep current selection in that case. 1066 // It would be better to know why the DecorView does not have focus at that time. 1067 if (((mTextView.isInExtractedMode()) || mSelectionMoved) && 1068 selStart >= 0 && selEnd >= 0) { 1069 /* 1070 * Someone intentionally set the selection, so let them 1071 * do whatever it is that they wanted to do instead of 1072 * the default on-focus behavior. We reset the selection 1073 * here instead of just skipping the onTakeFocus() call 1074 * because some movement methods do something other than 1075 * just setting the selection in theirs and we still 1076 * need to go through that path. 1077 */ 1078 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1079 } 1080 1081 if (mSelectAllOnFocus) { 1082 mTextView.selectAllText(); 1083 } 1084 1085 mTouchFocusSelected = true; 1086 } 1087 1088 mFrozenWithFocus = false; 1089 mSelectionMoved = false; 1090 1091 if (mError != null) { 1092 showError(); 1093 } 1094 1095 makeBlink(); 1096 } else { 1097 if (mError != null) { 1098 hideError(); 1099 } 1100 // Don't leave us in the middle of a batch edit. 1101 mTextView.onEndBatchEdit(); 1102 1103 if (mTextView.isInExtractedMode()) { 1104 // terminateTextSelectionMode removes selection, which we want to keep when 1105 // ExtractEditText goes out of focus. 1106 final int selStart = mTextView.getSelectionStart(); 1107 final int selEnd = mTextView.getSelectionEnd(); 1108 hideCursorAndSpanControllers(); 1109 stopTextActionMode(); 1110 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1111 } else { 1112 if (mTemporaryDetach) mPreserveDetachedSelection = true; 1113 hideCursorAndSpanControllers(); 1114 stopTextActionMode(); 1115 if (mTemporaryDetach) mPreserveDetachedSelection = false; 1116 downgradeEasyCorrectionSpans(); 1117 } 1118 1119 // No need to create the controller 1120 if (mSelectionModifierCursorController != null) { 1121 mSelectionModifierCursorController.resetTouchOffsets(); 1122 } 1123 } 1124 } 1125 1126 /** 1127 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1128 * span. 1129 */ 1130 private void downgradeEasyCorrectionSpans() { 1131 CharSequence text = mTextView.getText(); 1132 if (text instanceof Spannable) { 1133 Spannable spannable = (Spannable) text; 1134 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1135 spannable.length(), SuggestionSpan.class); 1136 for (int i = 0; i < suggestionSpans.length; i++) { 1137 int flags = suggestionSpans[i].getFlags(); 1138 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1139 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1140 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1141 suggestionSpans[i].setFlags(flags); 1142 } 1143 } 1144 } 1145 } 1146 1147 void sendOnTextChanged(int start, int after) { 1148 updateSpellCheckSpans(start, start + after, false); 1149 1150 // Flip flag to indicate the word iterator needs to have the text reset. 1151 mUpdateWordIteratorText = true; 1152 1153 // Hide the controllers as soon as text is modified (typing, procedural...) 1154 // We do not hide the span controllers, since they can be added when a new text is 1155 // inserted into the text view (voice IME). 1156 hideCursorControllers(); 1157 // Reset drag accelerator. 1158 if (mSelectionModifierCursorController != null) { 1159 mSelectionModifierCursorController.resetTouchOffsets(); 1160 } 1161 stopTextActionMode(); 1162 } 1163 1164 private int getLastTapPosition() { 1165 // No need to create the controller at that point, no last tap position saved 1166 if (mSelectionModifierCursorController != null) { 1167 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1168 if (lastTapPosition >= 0) { 1169 // Safety check, should not be possible. 1170 if (lastTapPosition > mTextView.getText().length()) { 1171 lastTapPosition = mTextView.getText().length(); 1172 } 1173 return lastTapPosition; 1174 } 1175 } 1176 1177 return -1; 1178 } 1179 1180 void onWindowFocusChanged(boolean hasWindowFocus) { 1181 if (hasWindowFocus) { 1182 if (mBlink != null) { 1183 mBlink.uncancel(); 1184 makeBlink(); 1185 } 1186 final InputMethodManager imm = InputMethodManager.peekInstance(); 1187 final boolean immFullScreen = (imm != null && imm.isFullscreenMode()); 1188 if (mSelectionModifierCursorController != null && mTextView.hasSelection() 1189 && !immFullScreen) { 1190 mSelectionModifierCursorController.show(); 1191 } 1192 } else { 1193 if (mBlink != null) { 1194 mBlink.cancel(); 1195 } 1196 if (mInputContentType != null) { 1197 mInputContentType.enterDown = false; 1198 } 1199 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1200 hideCursorAndSpanControllers(); 1201 if (mSelectionModifierCursorController != null) { 1202 mSelectionModifierCursorController.hide(); 1203 } 1204 if (mSuggestionsPopupWindow != null) { 1205 mSuggestionsPopupWindow.onParentLostFocus(); 1206 } 1207 1208 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1209 ensureEndedBatchEdit(); 1210 } 1211 } 1212 1213 void onTouchEvent(MotionEvent event) { 1214 updateFloatingToolbarVisibility(event); 1215 1216 if (hasSelectionController()) { 1217 getSelectionController().onTouchEvent(event); 1218 } 1219 1220 if (mShowSuggestionRunnable != null) { 1221 mTextView.removeCallbacks(mShowSuggestionRunnable); 1222 mShowSuggestionRunnable = null; 1223 } 1224 1225 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1226 mLastDownPositionX = event.getX(); 1227 mLastDownPositionY = event.getY(); 1228 1229 // Reset this state; it will be re-set if super.onTouchEvent 1230 // causes focus to move to the view. 1231 mTouchFocusSelected = false; 1232 mIgnoreActionUpEvent = false; 1233 } 1234 } 1235 1236 private void updateFloatingToolbarVisibility(MotionEvent event) { 1237 if (mTextActionMode != null) { 1238 switch (event.getActionMasked()) { 1239 case MotionEvent.ACTION_MOVE: 1240 hideFloatingToolbar(); 1241 break; 1242 case MotionEvent.ACTION_UP: // fall through 1243 case MotionEvent.ACTION_CANCEL: 1244 showFloatingToolbar(); 1245 } 1246 } 1247 } 1248 1249 private void hideFloatingToolbar() { 1250 if (mTextActionMode != null) { 1251 mTextView.removeCallbacks(mShowFloatingToolbar); 1252 mTextActionMode.hide(ActionMode.DEFAULT_HIDE_DURATION); 1253 } 1254 } 1255 1256 private void showFloatingToolbar() { 1257 if (mTextActionMode != null) { 1258 // Delay "show" so it doesn't interfere with click confirmations 1259 // or double-clicks that could "dismiss" the floating toolbar. 1260 int delay = ViewConfiguration.getDoubleTapTimeout(); 1261 mTextView.postDelayed(mShowFloatingToolbar, delay); 1262 } 1263 } 1264 1265 public void beginBatchEdit() { 1266 mInBatchEditControllers = true; 1267 final InputMethodState ims = mInputMethodState; 1268 if (ims != null) { 1269 int nesting = ++ims.mBatchEditNesting; 1270 if (nesting == 1) { 1271 ims.mCursorChanged = false; 1272 ims.mChangedDelta = 0; 1273 if (ims.mContentChanged) { 1274 // We already have a pending change from somewhere else, 1275 // so turn this into a full update. 1276 ims.mChangedStart = 0; 1277 ims.mChangedEnd = mTextView.getText().length(); 1278 } else { 1279 ims.mChangedStart = EXTRACT_UNKNOWN; 1280 ims.mChangedEnd = EXTRACT_UNKNOWN; 1281 ims.mContentChanged = false; 1282 } 1283 mUndoInputFilter.beginBatchEdit(); 1284 mTextView.onBeginBatchEdit(); 1285 } 1286 } 1287 } 1288 1289 public void endBatchEdit() { 1290 mInBatchEditControllers = false; 1291 final InputMethodState ims = mInputMethodState; 1292 if (ims != null) { 1293 int nesting = --ims.mBatchEditNesting; 1294 if (nesting == 0) { 1295 finishBatchEdit(ims); 1296 } 1297 } 1298 } 1299 1300 void ensureEndedBatchEdit() { 1301 final InputMethodState ims = mInputMethodState; 1302 if (ims != null && ims.mBatchEditNesting != 0) { 1303 ims.mBatchEditNesting = 0; 1304 finishBatchEdit(ims); 1305 } 1306 } 1307 1308 void finishBatchEdit(final InputMethodState ims) { 1309 mTextView.onEndBatchEdit(); 1310 mUndoInputFilter.endBatchEdit(); 1311 1312 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1313 mTextView.updateAfterEdit(); 1314 reportExtractedText(); 1315 } else if (ims.mCursorChanged) { 1316 // Cheesy way to get us to report the current cursor location. 1317 mTextView.invalidateCursor(); 1318 } 1319 // sendUpdateSelection knows to avoid sending if the selection did 1320 // not actually change. 1321 sendUpdateSelection(); 1322 } 1323 1324 static final int EXTRACT_NOTHING = -2; 1325 static final int EXTRACT_UNKNOWN = -1; 1326 1327 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1328 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1329 EXTRACT_UNKNOWN, outText); 1330 } 1331 1332 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1333 int partialStartOffset, int partialEndOffset, int delta, 1334 @Nullable ExtractedText outText) { 1335 if (request == null || outText == null) { 1336 return false; 1337 } 1338 1339 final CharSequence content = mTextView.getText(); 1340 if (content == null) { 1341 return false; 1342 } 1343 1344 if (partialStartOffset != EXTRACT_NOTHING) { 1345 final int N = content.length(); 1346 if (partialStartOffset < 0) { 1347 outText.partialStartOffset = outText.partialEndOffset = -1; 1348 partialStartOffset = 0; 1349 partialEndOffset = N; 1350 } else { 1351 // Now use the delta to determine the actual amount of text 1352 // we need. 1353 partialEndOffset += delta; 1354 // Adjust offsets to ensure we contain full spans. 1355 if (content instanceof Spanned) { 1356 Spanned spanned = (Spanned)content; 1357 Object[] spans = spanned.getSpans(partialStartOffset, 1358 partialEndOffset, ParcelableSpan.class); 1359 int i = spans.length; 1360 while (i > 0) { 1361 i--; 1362 int j = spanned.getSpanStart(spans[i]); 1363 if (j < partialStartOffset) partialStartOffset = j; 1364 j = spanned.getSpanEnd(spans[i]); 1365 if (j > partialEndOffset) partialEndOffset = j; 1366 } 1367 } 1368 outText.partialStartOffset = partialStartOffset; 1369 outText.partialEndOffset = partialEndOffset - delta; 1370 1371 if (partialStartOffset > N) { 1372 partialStartOffset = N; 1373 } else if (partialStartOffset < 0) { 1374 partialStartOffset = 0; 1375 } 1376 if (partialEndOffset > N) { 1377 partialEndOffset = N; 1378 } else if (partialEndOffset < 0) { 1379 partialEndOffset = 0; 1380 } 1381 } 1382 if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1383 outText.text = content.subSequence(partialStartOffset, 1384 partialEndOffset); 1385 } else { 1386 outText.text = TextUtils.substring(content, partialStartOffset, 1387 partialEndOffset); 1388 } 1389 } else { 1390 outText.partialStartOffset = 0; 1391 outText.partialEndOffset = 0; 1392 outText.text = ""; 1393 } 1394 outText.flags = 0; 1395 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1396 outText.flags |= ExtractedText.FLAG_SELECTING; 1397 } 1398 if (mTextView.isSingleLine()) { 1399 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1400 } 1401 outText.startOffset = 0; 1402 outText.selectionStart = mTextView.getSelectionStart(); 1403 outText.selectionEnd = mTextView.getSelectionEnd(); 1404 return true; 1405 } 1406 1407 boolean reportExtractedText() { 1408 final Editor.InputMethodState ims = mInputMethodState; 1409 if (ims != null) { 1410 final boolean contentChanged = ims.mContentChanged; 1411 if (contentChanged || ims.mSelectionModeChanged) { 1412 ims.mContentChanged = false; 1413 ims.mSelectionModeChanged = false; 1414 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1415 if (req != null) { 1416 InputMethodManager imm = InputMethodManager.peekInstance(); 1417 if (imm != null) { 1418 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1419 "Retrieving extracted start=" + ims.mChangedStart + 1420 " end=" + ims.mChangedEnd + 1421 " delta=" + ims.mChangedDelta); 1422 if (ims.mChangedStart < 0 && !contentChanged) { 1423 ims.mChangedStart = EXTRACT_NOTHING; 1424 } 1425 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1426 ims.mChangedDelta, ims.mExtractedText)) { 1427 if (TextView.DEBUG_EXTRACT) Log.v(TextView.LOG_TAG, 1428 "Reporting extracted start=" + 1429 ims.mExtractedText.partialStartOffset + 1430 " end=" + ims.mExtractedText.partialEndOffset + 1431 ": " + ims.mExtractedText.text); 1432 1433 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1434 ims.mChangedStart = EXTRACT_UNKNOWN; 1435 ims.mChangedEnd = EXTRACT_UNKNOWN; 1436 ims.mChangedDelta = 0; 1437 ims.mContentChanged = false; 1438 return true; 1439 } 1440 } 1441 } 1442 } 1443 } 1444 return false; 1445 } 1446 1447 private void sendUpdateSelection() { 1448 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1449 final InputMethodManager imm = InputMethodManager.peekInstance(); 1450 if (null != imm) { 1451 final int selectionStart = mTextView.getSelectionStart(); 1452 final int selectionEnd = mTextView.getSelectionEnd(); 1453 int candStart = -1; 1454 int candEnd = -1; 1455 if (mTextView.getText() instanceof Spannable) { 1456 final Spannable sp = (Spannable) mTextView.getText(); 1457 candStart = EditableInputConnection.getComposingSpanStart(sp); 1458 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1459 } 1460 // InputMethodManager#updateSelection skips sending the message if 1461 // none of the parameters have changed since the last time we called it. 1462 imm.updateSelection(mTextView, 1463 selectionStart, selectionEnd, candStart, candEnd); 1464 } 1465 } 1466 } 1467 1468 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1469 int cursorOffsetVertical) { 1470 final int selectionStart = mTextView.getSelectionStart(); 1471 final int selectionEnd = mTextView.getSelectionEnd(); 1472 1473 final InputMethodState ims = mInputMethodState; 1474 if (ims != null && ims.mBatchEditNesting == 0) { 1475 InputMethodManager imm = InputMethodManager.peekInstance(); 1476 if (imm != null) { 1477 if (imm.isActive(mTextView)) { 1478 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1479 // We are in extract mode and the content has changed 1480 // in some way... just report complete new text to the 1481 // input method. 1482 reportExtractedText(); 1483 } 1484 } 1485 } 1486 } 1487 1488 if (mCorrectionHighlighter != null) { 1489 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1490 } 1491 1492 if (highlight != null && selectionStart == selectionEnd && mCursorCount > 0) { 1493 drawCursor(canvas, cursorOffsetVertical); 1494 // Rely on the drawable entirely, do not draw the cursor line. 1495 // Has to be done after the IMM related code above which relies on the highlight. 1496 highlight = null; 1497 } 1498 1499 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1500 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1501 cursorOffsetVertical); 1502 } else { 1503 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1504 } 1505 } 1506 1507 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1508 Paint highlightPaint, int cursorOffsetVertical) { 1509 final long lineRange = layout.getLineRangeForDraw(canvas); 1510 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1511 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1512 if (lastLine < 0) return; 1513 1514 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1515 firstLine, lastLine); 1516 1517 if (layout instanceof DynamicLayout) { 1518 if (mTextRenderNodes == null) { 1519 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1520 } 1521 1522 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1523 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1524 int[] blockIndices = dynamicLayout.getBlockIndices(); 1525 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1526 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1527 1528 int endOfPreviousBlock = -1; 1529 int searchStartIndex = 0; 1530 for (int i = 0; i < numberOfBlocks; i++) { 1531 int blockEndLine = blockEndLines[i]; 1532 int blockIndex = blockIndices[i]; 1533 1534 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1535 if (blockIsInvalid) { 1536 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1537 searchStartIndex); 1538 // Note how dynamic layout's internal block indices get updated from Editor 1539 blockIndices[i] = blockIndex; 1540 if (mTextRenderNodes[blockIndex] != null) { 1541 mTextRenderNodes[blockIndex].isDirty = true; 1542 } 1543 searchStartIndex = blockIndex + 1; 1544 } 1545 1546 if (mTextRenderNodes[blockIndex] == null) { 1547 mTextRenderNodes[blockIndex] = 1548 new TextRenderNode("Text " + blockIndex); 1549 } 1550 1551 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1552 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1553 if (i >= indexFirstChangedBlock || blockDisplayListIsInvalid) { 1554 final int blockBeginLine = endOfPreviousBlock + 1; 1555 final int top = layout.getLineTop(blockBeginLine); 1556 final int bottom = layout.getLineBottom(blockEndLine); 1557 int left = 0; 1558 int right = mTextView.getWidth(); 1559 if (mTextView.getHorizontallyScrolling()) { 1560 float min = Float.MAX_VALUE; 1561 float max = Float.MIN_VALUE; 1562 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1563 min = Math.min(min, layout.getLineLeft(line)); 1564 max = Math.max(max, layout.getLineRight(line)); 1565 } 1566 left = (int) min; 1567 right = (int) (max + 0.5f); 1568 } 1569 1570 // Rebuild display list if it is invalid 1571 if (blockDisplayListIsInvalid) { 1572 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1573 right - left, bottom - top); 1574 try { 1575 // drawText is always relative to TextView's origin, this translation 1576 // brings this range of text back to the top left corner of the viewport 1577 displayListCanvas.translate(-left, -top); 1578 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1579 mTextRenderNodes[blockIndex].isDirty = false; 1580 // No need to untranslate, previous context is popped after 1581 // drawDisplayList 1582 } finally { 1583 blockDisplayList.end(displayListCanvas); 1584 // Same as drawDisplayList below, handled by our TextView's parent 1585 blockDisplayList.setClipToBounds(false); 1586 } 1587 } 1588 1589 // Valid disply list whose index is >= indexFirstChangedBlock 1590 // only needs to update its drawing location. 1591 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1592 } 1593 1594 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1595 1596 endOfPreviousBlock = blockEndLine; 1597 } 1598 1599 dynamicLayout.setIndexFirstChangedBlock(numberOfBlocks); 1600 } else { 1601 // Boring layout is used for empty and hint text 1602 layout.drawText(canvas, firstLine, lastLine); 1603 } 1604 } 1605 1606 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1607 int searchStartIndex) { 1608 int length = mTextRenderNodes.length; 1609 for (int i = searchStartIndex; i < length; i++) { 1610 boolean blockIndexFound = false; 1611 for (int j = 0; j < numberOfBlocks; j++) { 1612 if (blockIndices[j] == i) { 1613 blockIndexFound = true; 1614 break; 1615 } 1616 } 1617 if (blockIndexFound) continue; 1618 return i; 1619 } 1620 1621 // No available index found, the pool has to grow 1622 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1623 return length; 1624 } 1625 1626 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1627 final boolean translate = cursorOffsetVertical != 0; 1628 if (translate) canvas.translate(0, cursorOffsetVertical); 1629 for (int i = 0; i < mCursorCount; i++) { 1630 mCursorDrawable[i].draw(canvas); 1631 } 1632 if (translate) canvas.translate(0, -cursorOffsetVertical); 1633 } 1634 1635 /** 1636 * Invalidates all the sub-display lists that overlap the specified character range 1637 */ 1638 void invalidateTextDisplayList(Layout layout, int start, int end) { 1639 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1640 final int firstLine = layout.getLineForOffset(start); 1641 final int lastLine = layout.getLineForOffset(end); 1642 1643 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1644 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1645 int[] blockIndices = dynamicLayout.getBlockIndices(); 1646 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1647 1648 int i = 0; 1649 // Skip the blocks before firstLine 1650 while (i < numberOfBlocks) { 1651 if (blockEndLines[i] >= firstLine) break; 1652 i++; 1653 } 1654 1655 // Invalidate all subsequent blocks until lastLine is passed 1656 while (i < numberOfBlocks) { 1657 final int blockIndex = blockIndices[i]; 1658 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 1659 mTextRenderNodes[blockIndex].isDirty = true; 1660 } 1661 if (blockEndLines[i] >= lastLine) break; 1662 i++; 1663 } 1664 } 1665 } 1666 1667 void invalidateTextDisplayList() { 1668 if (mTextRenderNodes != null) { 1669 for (int i = 0; i < mTextRenderNodes.length; i++) { 1670 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 1671 } 1672 } 1673 } 1674 1675 void updateCursorsPositions() { 1676 if (mTextView.mCursorDrawableRes == 0) { 1677 mCursorCount = 0; 1678 return; 1679 } 1680 1681 Layout layout = mTextView.getLayout(); 1682 Layout hintLayout = mTextView.getHintLayout(); 1683 final int offset = mTextView.getSelectionStart(); 1684 final int line = layout.getLineForOffset(offset); 1685 final int top = layout.getLineTop(line); 1686 final int bottom = layout.getLineTop(line + 1); 1687 1688 mCursorCount = layout.isLevelBoundary(offset) ? 2 : 1; 1689 1690 int middle = bottom; 1691 if (mCursorCount == 2) { 1692 // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)} 1693 middle = (top + bottom) >> 1; 1694 } 1695 1696 boolean clamped = layout.shouldClampCursor(line); 1697 updateCursorPosition(0, top, middle, 1698 getPrimaryHorizontal(layout, hintLayout, offset, clamped)); 1699 1700 if (mCursorCount == 2) { 1701 updateCursorPosition(1, middle, bottom, 1702 layout.getSecondaryHorizontal(offset, clamped)); 1703 } 1704 } 1705 1706 private float getPrimaryHorizontal(Layout layout, Layout hintLayout, int offset, 1707 boolean clamped) { 1708 if (TextUtils.isEmpty(layout.getText()) && 1709 hintLayout != null && 1710 !TextUtils.isEmpty(hintLayout.getText())) { 1711 return hintLayout.getPrimaryHorizontal(offset, clamped); 1712 } else { 1713 return layout.getPrimaryHorizontal(offset, clamped); 1714 } 1715 } 1716 1717 /** 1718 * Start an Insertion action mode. 1719 */ 1720 void startInsertionActionMode() { 1721 if (mInsertionActionModeRunnable != null) { 1722 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1723 } 1724 if (extractedTextModeWillBeStarted()) { 1725 return; 1726 } 1727 stopTextActionMode(); 1728 1729 ActionMode.Callback actionModeCallback = 1730 new TextActionModeCallback(false /* hasSelection */); 1731 mTextActionMode = mTextView.startActionMode( 1732 actionModeCallback, ActionMode.TYPE_FLOATING); 1733 if (mTextActionMode != null && getInsertionController() != null) { 1734 getInsertionController().show(); 1735 } 1736 } 1737 1738 /** 1739 * Starts a Selection Action Mode with the current selection and ensures the selection handles 1740 * are shown if there is a selection, otherwise the insertion handle is shown. This should be 1741 * used when the mode is started from a non-touch event. 1742 * 1743 * @return true if the selection mode was actually started. 1744 */ 1745 boolean startSelectionActionMode() { 1746 boolean selectionStarted = startSelectionActionModeInternal(); 1747 if (selectionStarted) { 1748 getSelectionController().show(); 1749 } else if (getInsertionController() != null) { 1750 getInsertionController().show(); 1751 } 1752 return selectionStarted; 1753 } 1754 1755 /** 1756 * If the TextView allows text selection, selects the current word when no existing selection 1757 * was available and starts a drag. 1758 * 1759 * @return true if the drag was started. 1760 */ 1761 private boolean selectCurrentWordAndStartDrag() { 1762 if (mInsertionActionModeRunnable != null) { 1763 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1764 } 1765 if (extractedTextModeWillBeStarted()) { 1766 return false; 1767 } 1768 if (mTextActionMode != null) { 1769 mTextActionMode.finish(); 1770 } 1771 if (!checkFieldAndSelectCurrentWord()) { 1772 return false; 1773 } 1774 1775 // Avoid dismissing the selection if it exists. 1776 mPreserveDetachedSelection = true; 1777 stopTextActionMode(); 1778 mPreserveDetachedSelection = false; 1779 1780 getSelectionController().enterDrag(); 1781 return true; 1782 } 1783 1784 /** 1785 * Checks whether a selection can be performed on the current TextView and if so selects 1786 * the current word. 1787 * 1788 * @return true if there already was a selection or if the current word was selected. 1789 */ 1790 private boolean checkFieldAndSelectCurrentWord() { 1791 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 1792 Log.w(TextView.LOG_TAG, 1793 "TextView does not support text selection. Selection cancelled."); 1794 return false; 1795 } 1796 1797 if (!mTextView.hasSelection()) { 1798 // There may already be a selection on device rotation 1799 return selectCurrentWord(); 1800 } 1801 return true; 1802 } 1803 1804 private boolean startSelectionActionModeInternal() { 1805 if (mTextActionMode != null) { 1806 // Text action mode is already started 1807 mTextActionMode.invalidate(); 1808 return false; 1809 } 1810 1811 if (!checkFieldAndSelectCurrentWord()) { 1812 return false; 1813 } 1814 1815 boolean willExtract = extractedTextModeWillBeStarted(); 1816 1817 // Do not start the action mode when extracted text will show up full screen, which would 1818 // immediately hide the newly created action bar and would be visually distracting. 1819 if (!willExtract) { 1820 ActionMode.Callback actionModeCallback = 1821 new TextActionModeCallback(true /* hasSelection */); 1822 mTextActionMode = mTextView.startActionMode( 1823 actionModeCallback, ActionMode.TYPE_FLOATING); 1824 } 1825 1826 final boolean selectionStarted = mTextActionMode != null || willExtract; 1827 if (selectionStarted && !mTextView.isTextSelectable() && mShowSoftInputOnFocus) { 1828 // Show the IME to be able to replace text, except when selecting non editable text. 1829 final InputMethodManager imm = InputMethodManager.peekInstance(); 1830 if (imm != null) { 1831 imm.showSoftInput(mTextView, 0, null); 1832 } 1833 } 1834 return selectionStarted; 1835 } 1836 1837 private boolean extractedTextModeWillBeStarted() { 1838 if (!(mTextView.isInExtractedMode())) { 1839 final InputMethodManager imm = InputMethodManager.peekInstance(); 1840 return imm != null && imm.isFullscreenMode(); 1841 } 1842 return false; 1843 } 1844 1845 /** 1846 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 1847 * the current cursor position or selection range. This method is consistent with the 1848 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 1849 */ 1850 private boolean shouldOfferToShowSuggestions() { 1851 CharSequence text = mTextView.getText(); 1852 if (!(text instanceof Spannable)) return false; 1853 1854 final Spannable spannable = (Spannable) text; 1855 final int selectionStart = mTextView.getSelectionStart(); 1856 final int selectionEnd = mTextView.getSelectionEnd(); 1857 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 1858 SuggestionSpan.class); 1859 if (suggestionSpans.length == 0) { 1860 return false; 1861 } 1862 if (selectionStart == selectionEnd) { 1863 // Spans overlap the cursor. 1864 for (int i = 0; i < suggestionSpans.length; i++) { 1865 if (suggestionSpans[i].getSuggestions().length > 0) { 1866 return true; 1867 } 1868 } 1869 return false; 1870 } 1871 int minSpanStart = mTextView.getText().length(); 1872 int maxSpanEnd = 0; 1873 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 1874 int unionOfSpansCoveringSelectionStartEnd = 0; 1875 boolean hasValidSuggestions = false; 1876 for (int i = 0; i < suggestionSpans.length; i++) { 1877 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 1878 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 1879 minSpanStart = Math.min(minSpanStart, spanStart); 1880 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 1881 if (selectionStart < spanStart || selectionStart > spanEnd) { 1882 // The span doesn't cover the current selection start point. 1883 continue; 1884 } 1885 hasValidSuggestions = 1886 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 1887 unionOfSpansCoveringSelectionStartStart = 1888 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 1889 unionOfSpansCoveringSelectionStartEnd = 1890 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 1891 } 1892 if (!hasValidSuggestions) { 1893 return false; 1894 } 1895 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 1896 // No spans cover the selection start point. 1897 return false; 1898 } 1899 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 1900 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 1901 // There is a span that is not covered by the union. In this case, we soouldn't offer 1902 // to show suggestions as it's confusing. 1903 return false; 1904 } 1905 return true; 1906 } 1907 1908 /** 1909 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 1910 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 1911 */ 1912 private boolean isCursorInsideEasyCorrectionSpan() { 1913 Spannable spannable = (Spannable) mTextView.getText(); 1914 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 1915 mTextView.getSelectionEnd(), SuggestionSpan.class); 1916 for (int i = 0; i < suggestionSpans.length; i++) { 1917 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 1918 return true; 1919 } 1920 } 1921 return false; 1922 } 1923 1924 void onTouchUpEvent(MotionEvent event) { 1925 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 1926 hideCursorAndSpanControllers(); 1927 stopTextActionMode(); 1928 CharSequence text = mTextView.getText(); 1929 if (!selectAllGotFocus && text.length() > 0) { 1930 // Move cursor 1931 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 1932 Selection.setSelection((Spannable) text, offset); 1933 if (mSpellChecker != null) { 1934 // When the cursor moves, the word that was typed may need spell check 1935 mSpellChecker.onSelectionChanged(); 1936 } 1937 1938 if (!extractedTextModeWillBeStarted()) { 1939 if (isCursorInsideEasyCorrectionSpan()) { 1940 // Cancel the single tap delayed runnable. 1941 if (mInsertionActionModeRunnable != null) { 1942 mTextView.removeCallbacks(mInsertionActionModeRunnable); 1943 } 1944 1945 mShowSuggestionRunnable = new Runnable() { 1946 public void run() { 1947 showSuggestions(); 1948 } 1949 }; 1950 // removeCallbacks is performed on every touch 1951 mTextView.postDelayed(mShowSuggestionRunnable, 1952 ViewConfiguration.getDoubleTapTimeout()); 1953 } else if (hasInsertionController()) { 1954 getInsertionController().show(); 1955 } 1956 } 1957 } 1958 } 1959 1960 protected void stopTextActionMode() { 1961 if (mTextActionMode != null) { 1962 // This will hide the mSelectionModifierCursorController 1963 mTextActionMode.finish(); 1964 } 1965 } 1966 1967 /** 1968 * @return True if this view supports insertion handles. 1969 */ 1970 boolean hasInsertionController() { 1971 return mInsertionControllerEnabled; 1972 } 1973 1974 /** 1975 * @return True if this view supports selection handles. 1976 */ 1977 boolean hasSelectionController() { 1978 return mSelectionControllerEnabled; 1979 } 1980 1981 InsertionPointCursorController getInsertionController() { 1982 if (!mInsertionControllerEnabled) { 1983 return null; 1984 } 1985 1986 if (mInsertionPointCursorController == null) { 1987 mInsertionPointCursorController = new InsertionPointCursorController(); 1988 1989 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 1990 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 1991 } 1992 1993 return mInsertionPointCursorController; 1994 } 1995 1996 SelectionModifierCursorController getSelectionController() { 1997 if (!mSelectionControllerEnabled) { 1998 return null; 1999 } 2000 2001 if (mSelectionModifierCursorController == null) { 2002 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2003 2004 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2005 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2006 } 2007 2008 return mSelectionModifierCursorController; 2009 } 2010 2011 private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) { 2012 if (mCursorDrawable[cursorIndex] == null) 2013 mCursorDrawable[cursorIndex] = mTextView.getContext().getDrawable( 2014 mTextView.mCursorDrawableRes); 2015 2016 if (mTempRect == null) mTempRect = new Rect(); 2017 mCursorDrawable[cursorIndex].getPadding(mTempRect); 2018 final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth(); 2019 horizontal = Math.max(0.5f, horizontal - 0.5f); 2020 final int left = (int) (horizontal) - mTempRect.left; 2021 mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width, 2022 bottom + mTempRect.bottom); 2023 } 2024 2025 /** 2026 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2027 * a dictionary) from the current input method, provided by it calling 2028 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2029 * implementation flashes the background of the corrected word to provide feedback to the user. 2030 * 2031 * @param info The auto correct info about the text that was corrected. 2032 */ 2033 public void onCommitCorrection(CorrectionInfo info) { 2034 if (mCorrectionHighlighter == null) { 2035 mCorrectionHighlighter = new CorrectionHighlighter(); 2036 } else { 2037 mCorrectionHighlighter.invalidate(false); 2038 } 2039 2040 mCorrectionHighlighter.highlight(info); 2041 } 2042 2043 void showSuggestions() { 2044 if (mSuggestionsPopupWindow == null) { 2045 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 2046 } 2047 hideCursorAndSpanControllers(); 2048 stopTextActionMode(); 2049 mSuggestionsPopupWindow.show(); 2050 } 2051 2052 void onScrollChanged() { 2053 if (mPositionListener != null) { 2054 mPositionListener.onScrollChanged(); 2055 } 2056 if (mTextActionMode != null) { 2057 mTextActionMode.invalidateContentRect(); 2058 } 2059 } 2060 2061 /** 2062 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2063 */ 2064 private boolean shouldBlink() { 2065 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2066 2067 final int start = mTextView.getSelectionStart(); 2068 if (start < 0) return false; 2069 2070 final int end = mTextView.getSelectionEnd(); 2071 if (end < 0) return false; 2072 2073 return start == end; 2074 } 2075 2076 void makeBlink() { 2077 if (shouldBlink()) { 2078 mShowCursor = SystemClock.uptimeMillis(); 2079 if (mBlink == null) mBlink = new Blink(); 2080 mBlink.removeCallbacks(mBlink); 2081 mBlink.postAtTime(mBlink, mShowCursor + BLINK); 2082 } else { 2083 if (mBlink != null) mBlink.removeCallbacks(mBlink); 2084 } 2085 } 2086 2087 private class Blink extends Handler implements Runnable { 2088 private boolean mCancelled; 2089 2090 public void run() { 2091 if (mCancelled) { 2092 return; 2093 } 2094 2095 removeCallbacks(Blink.this); 2096 2097 if (shouldBlink()) { 2098 if (mTextView.getLayout() != null) { 2099 mTextView.invalidateCursorPath(); 2100 } 2101 2102 postAtTime(this, SystemClock.uptimeMillis() + BLINK); 2103 } 2104 } 2105 2106 void cancel() { 2107 if (!mCancelled) { 2108 removeCallbacks(Blink.this); 2109 mCancelled = true; 2110 } 2111 } 2112 2113 void uncancel() { 2114 mCancelled = false; 2115 } 2116 } 2117 2118 private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) { 2119 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2120 com.android.internal.R.layout.text_drag_thumbnail, null); 2121 2122 if (shadowView == null) { 2123 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2124 } 2125 2126 if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2127 text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH); 2128 } 2129 shadowView.setText(text); 2130 shadowView.setTextColor(mTextView.getTextColors()); 2131 2132 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2133 shadowView.setGravity(Gravity.CENTER); 2134 2135 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2136 ViewGroup.LayoutParams.WRAP_CONTENT)); 2137 2138 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2139 shadowView.measure(size, size); 2140 2141 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2142 shadowView.invalidate(); 2143 return new DragShadowBuilder(shadowView); 2144 } 2145 2146 private static class DragLocalState { 2147 public TextView sourceTextView; 2148 public int start, end; 2149 2150 public DragLocalState(TextView sourceTextView, int start, int end) { 2151 this.sourceTextView = sourceTextView; 2152 this.start = start; 2153 this.end = end; 2154 } 2155 } 2156 2157 void onDrop(DragEvent event) { 2158 StringBuilder content = new StringBuilder(""); 2159 ClipData clipData = event.getClipData(); 2160 final int itemCount = clipData.getItemCount(); 2161 for (int i=0; i < itemCount; i++) { 2162 Item item = clipData.getItemAt(i); 2163 content.append(item.coerceToStyledText(mTextView.getContext())); 2164 } 2165 2166 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2167 2168 Object localState = event.getLocalState(); 2169 DragLocalState dragLocalState = null; 2170 if (localState instanceof DragLocalState) { 2171 dragLocalState = (DragLocalState) localState; 2172 } 2173 boolean dragDropIntoItself = dragLocalState != null && 2174 dragLocalState.sourceTextView == mTextView; 2175 2176 if (dragDropIntoItself) { 2177 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2178 // A drop inside the original selection discards the drop. 2179 return; 2180 } 2181 } 2182 2183 final int originalLength = mTextView.getText().length(); 2184 int min = offset; 2185 int max = offset; 2186 2187 Selection.setSelection((Spannable) mTextView.getText(), max); 2188 mTextView.replaceText_internal(min, max, content); 2189 2190 if (dragDropIntoItself) { 2191 int dragSourceStart = dragLocalState.start; 2192 int dragSourceEnd = dragLocalState.end; 2193 if (max <= dragSourceStart) { 2194 // Inserting text before selection has shifted positions 2195 final int shift = mTextView.getText().length() - originalLength; 2196 dragSourceStart += shift; 2197 dragSourceEnd += shift; 2198 } 2199 2200 // Delete original selection 2201 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2202 2203 // Make sure we do not leave two adjacent spaces. 2204 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2205 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2206 if (nextCharIdx > prevCharIdx + 1) { 2207 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2208 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2209 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2210 } 2211 } 2212 } 2213 } 2214 2215 public void addSpanWatchers(Spannable text) { 2216 final int textLength = text.length(); 2217 2218 if (mKeyListener != null) { 2219 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2220 } 2221 2222 if (mSpanController == null) { 2223 mSpanController = new SpanController(); 2224 } 2225 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2226 } 2227 2228 /** 2229 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2230 * pop-up should be displayed. 2231 * Also monitors {@link Selection} to call back to the attached input method. 2232 */ 2233 class SpanController implements SpanWatcher { 2234 2235 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2236 2237 private EasyEditPopupWindow mPopupWindow; 2238 2239 private Runnable mHidePopup; 2240 2241 // This function is pure but inner classes can't have static functions 2242 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2243 final Object span) { 2244 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2245 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2246 } 2247 2248 @Override 2249 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2250 if (isNonIntermediateSelectionSpan(text, span)) { 2251 sendUpdateSelection(); 2252 } else if (span instanceof EasyEditSpan) { 2253 if (mPopupWindow == null) { 2254 mPopupWindow = new EasyEditPopupWindow(); 2255 mHidePopup = new Runnable() { 2256 @Override 2257 public void run() { 2258 hide(); 2259 } 2260 }; 2261 } 2262 2263 // Make sure there is only at most one EasyEditSpan in the text 2264 if (mPopupWindow.mEasyEditSpan != null) { 2265 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2266 } 2267 2268 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2269 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2270 @Override 2271 public void onDeleteClick(EasyEditSpan span) { 2272 Editable editable = (Editable) mTextView.getText(); 2273 int start = editable.getSpanStart(span); 2274 int end = editable.getSpanEnd(span); 2275 if (start >= 0 && end >= 0) { 2276 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2277 mTextView.deleteText_internal(start, end); 2278 } 2279 editable.removeSpan(span); 2280 } 2281 }); 2282 2283 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2284 // The window is not visible yet, ignore the text change. 2285 return; 2286 } 2287 2288 if (mTextView.getLayout() == null) { 2289 // The view has not been laid out yet, ignore the text change 2290 return; 2291 } 2292 2293 if (extractedTextModeWillBeStarted()) { 2294 // The input is in extract mode. Do not handle the easy edit in 2295 // the original TextView, as the ExtractEditText will do 2296 return; 2297 } 2298 2299 mPopupWindow.show(); 2300 mTextView.removeCallbacks(mHidePopup); 2301 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2302 } 2303 } 2304 2305 @Override 2306 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2307 if (isNonIntermediateSelectionSpan(text, span)) { 2308 sendUpdateSelection(); 2309 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2310 hide(); 2311 } 2312 } 2313 2314 @Override 2315 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2316 int newStart, int newEnd) { 2317 if (isNonIntermediateSelectionSpan(text, span)) { 2318 sendUpdateSelection(); 2319 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2320 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2321 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2322 text.removeSpan(easyEditSpan); 2323 } 2324 } 2325 2326 public void hide() { 2327 if (mPopupWindow != null) { 2328 mPopupWindow.hide(); 2329 mTextView.removeCallbacks(mHidePopup); 2330 } 2331 } 2332 2333 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 2334 try { 2335 PendingIntent pendingIntent = span.getPendingIntent(); 2336 if (pendingIntent != null) { 2337 Intent intent = new Intent(); 2338 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 2339 pendingIntent.send(mTextView.getContext(), 0, intent); 2340 } 2341 } catch (CanceledException e) { 2342 // This should not happen, as we should try to send the intent only once. 2343 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 2344 } 2345 } 2346 } 2347 2348 /** 2349 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 2350 */ 2351 private interface EasyEditDeleteListener { 2352 2353 /** 2354 * Clicks the delete pop-up. 2355 */ 2356 void onDeleteClick(EasyEditSpan span); 2357 } 2358 2359 /** 2360 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 2361 * by {@link SpanController}. 2362 */ 2363 private class EasyEditPopupWindow extends PinnedPopupWindow 2364 implements OnClickListener { 2365 private static final int POPUP_TEXT_LAYOUT = 2366 com.android.internal.R.layout.text_edit_action_popup_text; 2367 private TextView mDeleteTextView; 2368 private EasyEditSpan mEasyEditSpan; 2369 private EasyEditDeleteListener mOnDeleteListener; 2370 2371 @Override 2372 protected void createPopupWindow() { 2373 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 2374 com.android.internal.R.attr.textSelectHandleWindowStyle); 2375 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2376 mPopupWindow.setClippingEnabled(true); 2377 } 2378 2379 @Override 2380 protected void initContentView() { 2381 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 2382 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 2383 mContentView = linearLayout; 2384 mContentView.setBackgroundResource( 2385 com.android.internal.R.drawable.text_edit_side_paste_window); 2386 2387 LayoutInflater inflater = (LayoutInflater)mTextView.getContext(). 2388 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2389 2390 LayoutParams wrapContent = new LayoutParams( 2391 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 2392 2393 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 2394 mDeleteTextView.setLayoutParams(wrapContent); 2395 mDeleteTextView.setText(com.android.internal.R.string.delete); 2396 mDeleteTextView.setOnClickListener(this); 2397 mContentView.addView(mDeleteTextView); 2398 } 2399 2400 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 2401 mEasyEditSpan = easyEditSpan; 2402 } 2403 2404 private void setOnDeleteListener(EasyEditDeleteListener listener) { 2405 mOnDeleteListener = listener; 2406 } 2407 2408 @Override 2409 public void onClick(View view) { 2410 if (view == mDeleteTextView 2411 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 2412 && mOnDeleteListener != null) { 2413 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 2414 } 2415 } 2416 2417 @Override 2418 public void hide() { 2419 if (mEasyEditSpan != null) { 2420 mEasyEditSpan.setDeleteEnabled(false); 2421 } 2422 mOnDeleteListener = null; 2423 super.hide(); 2424 } 2425 2426 @Override 2427 protected int getTextOffset() { 2428 // Place the pop-up at the end of the span 2429 Editable editable = (Editable) mTextView.getText(); 2430 return editable.getSpanEnd(mEasyEditSpan); 2431 } 2432 2433 @Override 2434 protected int getVerticalLocalPosition(int line) { 2435 return mTextView.getLayout().getLineBottom(line); 2436 } 2437 2438 @Override 2439 protected int clipVertically(int positionY) { 2440 // As we display the pop-up below the span, no vertical clipping is required. 2441 return positionY; 2442 } 2443 } 2444 2445 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 2446 // 3 handles 2447 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 2448 // 1 CursorAnchorInfoNotifier 2449 private final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 2450 private TextViewPositionListener[] mPositionListeners = 2451 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 2452 private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 2453 private boolean mPositionHasChanged = true; 2454 // Absolute position of the TextView with respect to its parent window 2455 private int mPositionX, mPositionY; 2456 private int mNumberOfListeners; 2457 private boolean mScrollHasChanged; 2458 final int[] mTempCoords = new int[2]; 2459 2460 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 2461 if (mNumberOfListeners == 0) { 2462 updatePosition(); 2463 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2464 vto.addOnPreDrawListener(this); 2465 } 2466 2467 int emptySlotIndex = -1; 2468 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2469 TextViewPositionListener listener = mPositionListeners[i]; 2470 if (listener == positionListener) { 2471 return; 2472 } else if (emptySlotIndex < 0 && listener == null) { 2473 emptySlotIndex = i; 2474 } 2475 } 2476 2477 mPositionListeners[emptySlotIndex] = positionListener; 2478 mCanMove[emptySlotIndex] = canMove; 2479 mNumberOfListeners++; 2480 } 2481 2482 public void removeSubscriber(TextViewPositionListener positionListener) { 2483 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2484 if (mPositionListeners[i] == positionListener) { 2485 mPositionListeners[i] = null; 2486 mNumberOfListeners--; 2487 break; 2488 } 2489 } 2490 2491 if (mNumberOfListeners == 0) { 2492 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 2493 vto.removeOnPreDrawListener(this); 2494 } 2495 } 2496 2497 public int getPositionX() { 2498 return mPositionX; 2499 } 2500 2501 public int getPositionY() { 2502 return mPositionY; 2503 } 2504 2505 @Override 2506 public boolean onPreDraw() { 2507 updatePosition(); 2508 2509 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 2510 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 2511 TextViewPositionListener positionListener = mPositionListeners[i]; 2512 if (positionListener != null) { 2513 positionListener.updatePosition(mPositionX, mPositionY, 2514 mPositionHasChanged, mScrollHasChanged); 2515 } 2516 } 2517 } 2518 2519 mScrollHasChanged = false; 2520 return true; 2521 } 2522 2523 private void updatePosition() { 2524 mTextView.getLocationInWindow(mTempCoords); 2525 2526 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 2527 2528 mPositionX = mTempCoords[0]; 2529 mPositionY = mTempCoords[1]; 2530 } 2531 2532 public void onScrollChanged() { 2533 mScrollHasChanged = true; 2534 } 2535 } 2536 2537 private abstract class PinnedPopupWindow implements TextViewPositionListener { 2538 protected PopupWindow mPopupWindow; 2539 protected ViewGroup mContentView; 2540 int mPositionX, mPositionY; 2541 2542 protected abstract void createPopupWindow(); 2543 protected abstract void initContentView(); 2544 protected abstract int getTextOffset(); 2545 protected abstract int getVerticalLocalPosition(int line); 2546 protected abstract int clipVertically(int positionY); 2547 2548 public PinnedPopupWindow() { 2549 createPopupWindow(); 2550 2551 mPopupWindow.setWindowLayoutType( 2552 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 2553 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 2554 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 2555 2556 initContentView(); 2557 2558 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2559 ViewGroup.LayoutParams.WRAP_CONTENT); 2560 mContentView.setLayoutParams(wrapContent); 2561 2562 mPopupWindow.setContentView(mContentView); 2563 } 2564 2565 public void show() { 2566 getPositionListener().addSubscriber(this, false /* offset is fixed */); 2567 2568 computeLocalPosition(); 2569 2570 final PositionListener positionListener = getPositionListener(); 2571 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 2572 } 2573 2574 protected void measureContent() { 2575 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2576 mContentView.measure( 2577 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 2578 View.MeasureSpec.AT_MOST), 2579 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 2580 View.MeasureSpec.AT_MOST)); 2581 } 2582 2583 /* The popup window will be horizontally centered on the getTextOffset() and vertically 2584 * positioned according to viewportToContentHorizontalOffset. 2585 * 2586 * This method assumes that mContentView has properly been measured from its content. */ 2587 private void computeLocalPosition() { 2588 measureContent(); 2589 final int width = mContentView.getMeasuredWidth(); 2590 final int offset = getTextOffset(); 2591 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 2592 mPositionX += mTextView.viewportToContentHorizontalOffset(); 2593 2594 final int line = mTextView.getLayout().getLineForOffset(offset); 2595 mPositionY = getVerticalLocalPosition(line); 2596 mPositionY += mTextView.viewportToContentVerticalOffset(); 2597 } 2598 2599 private void updatePosition(int parentPositionX, int parentPositionY) { 2600 int positionX = parentPositionX + mPositionX; 2601 int positionY = parentPositionY + mPositionY; 2602 2603 positionY = clipVertically(positionY); 2604 2605 // Horizontal clipping 2606 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2607 final int width = mContentView.getMeasuredWidth(); 2608 positionX = Math.min(displayMetrics.widthPixels - width, positionX); 2609 positionX = Math.max(0, positionX); 2610 2611 if (isShowing()) { 2612 mPopupWindow.update(positionX, positionY, -1, -1); 2613 } else { 2614 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 2615 positionX, positionY); 2616 } 2617 } 2618 2619 public void hide() { 2620 mPopupWindow.dismiss(); 2621 getPositionListener().removeSubscriber(this); 2622 } 2623 2624 @Override 2625 public void updatePosition(int parentPositionX, int parentPositionY, 2626 boolean parentPositionChanged, boolean parentScrolled) { 2627 // Either parentPositionChanged or parentScrolled is true, check if still visible 2628 if (isShowing() && isOffsetVisible(getTextOffset())) { 2629 if (parentScrolled) computeLocalPosition(); 2630 updatePosition(parentPositionX, parentPositionY); 2631 } else { 2632 hide(); 2633 } 2634 } 2635 2636 public boolean isShowing() { 2637 return mPopupWindow.isShowing(); 2638 } 2639 } 2640 2641 private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 2642 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 2643 private static final int ADD_TO_DICTIONARY = -1; 2644 private static final int DELETE_TEXT = -2; 2645 private SuggestionInfo[] mSuggestionInfos; 2646 private int mNumberOfSuggestions; 2647 private boolean mCursorWasVisibleBeforeSuggestions; 2648 private boolean mIsShowingUp = false; 2649 private SuggestionAdapter mSuggestionsAdapter; 2650 private final Comparator<SuggestionSpan> mSuggestionSpanComparator; 2651 private final HashMap<SuggestionSpan, Integer> mSpansLengths; 2652 2653 private class CustomPopupWindow extends PopupWindow { 2654 public CustomPopupWindow(Context context, int defStyleAttr) { 2655 super(context, null, defStyleAttr); 2656 } 2657 2658 @Override 2659 public void dismiss() { 2660 super.dismiss(); 2661 2662 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 2663 2664 // Safe cast since show() checks that mTextView.getText() is an Editable 2665 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 2666 2667 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 2668 if (hasInsertionController()) { 2669 getInsertionController().show(); 2670 } 2671 } 2672 } 2673 2674 public SuggestionsPopupWindow() { 2675 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2676 mSuggestionSpanComparator = new SuggestionSpanComparator(); 2677 mSpansLengths = new HashMap<SuggestionSpan, Integer>(); 2678 } 2679 2680 @Override 2681 protected void createPopupWindow() { 2682 mPopupWindow = new CustomPopupWindow(mTextView.getContext(), 2683 com.android.internal.R.attr.textSuggestionsWindowStyle); 2684 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 2685 mPopupWindow.setFocusable(true); 2686 mPopupWindow.setClippingEnabled(false); 2687 } 2688 2689 @Override 2690 protected void initContentView() { 2691 ListView listView = new ListView(mTextView.getContext()); 2692 mSuggestionsAdapter = new SuggestionAdapter(); 2693 listView.setAdapter(mSuggestionsAdapter); 2694 listView.setOnItemClickListener(this); 2695 mContentView = listView; 2696 2697 // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete 2698 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2]; 2699 for (int i = 0; i < mSuggestionInfos.length; i++) { 2700 mSuggestionInfos[i] = new SuggestionInfo(); 2701 } 2702 } 2703 2704 public boolean isShowingUp() { 2705 return mIsShowingUp; 2706 } 2707 2708 public void onParentLostFocus() { 2709 mIsShowingUp = false; 2710 } 2711 2712 private class SuggestionInfo { 2713 int suggestionStart, suggestionEnd; // range of actual suggestion within text 2714 SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents 2715 int suggestionIndex; // the index of this suggestion inside suggestionSpan 2716 SpannableStringBuilder text = new SpannableStringBuilder(); 2717 TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mTextView.getContext(), 2718 android.R.style.TextAppearance_SuggestionHighlight); 2719 } 2720 2721 private class SuggestionAdapter extends BaseAdapter { 2722 private LayoutInflater mInflater = (LayoutInflater) mTextView.getContext(). 2723 getSystemService(Context.LAYOUT_INFLATER_SERVICE); 2724 2725 @Override 2726 public int getCount() { 2727 return mNumberOfSuggestions; 2728 } 2729 2730 @Override 2731 public Object getItem(int position) { 2732 return mSuggestionInfos[position]; 2733 } 2734 2735 @Override 2736 public long getItemId(int position) { 2737 return position; 2738 } 2739 2740 @Override 2741 public View getView(int position, View convertView, ViewGroup parent) { 2742 TextView textView = (TextView) convertView; 2743 2744 if (textView == null) { 2745 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 2746 parent, false); 2747 } 2748 2749 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 2750 textView.setText(suggestionInfo.text); 2751 2752 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY || 2753 suggestionInfo.suggestionIndex == DELETE_TEXT) { 2754 textView.setBackgroundColor(Color.TRANSPARENT); 2755 } else { 2756 textView.setBackgroundColor(Color.WHITE); 2757 } 2758 2759 return textView; 2760 } 2761 } 2762 2763 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 2764 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 2765 final int flag1 = span1.getFlags(); 2766 final int flag2 = span2.getFlags(); 2767 if (flag1 != flag2) { 2768 // The order here should match what is used in updateDrawState 2769 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2770 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 2771 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2772 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 2773 if (easy1 && !misspelled1) return -1; 2774 if (easy2 && !misspelled2) return 1; 2775 if (misspelled1) return -1; 2776 if (misspelled2) return 1; 2777 } 2778 2779 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 2780 } 2781 } 2782 2783 /** 2784 * Returns the suggestion spans that cover the current cursor position. The suggestion 2785 * spans are sorted according to the length of text that they are attached to. 2786 */ 2787 private SuggestionSpan[] getSuggestionSpans() { 2788 int pos = mTextView.getSelectionStart(); 2789 Spannable spannable = (Spannable) mTextView.getText(); 2790 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 2791 2792 mSpansLengths.clear(); 2793 for (SuggestionSpan suggestionSpan : suggestionSpans) { 2794 int start = spannable.getSpanStart(suggestionSpan); 2795 int end = spannable.getSpanEnd(suggestionSpan); 2796 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 2797 } 2798 2799 // The suggestions are sorted according to their types (easy correction first, then 2800 // misspelled) and to the length of the text that they cover (shorter first). 2801 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 2802 return suggestionSpans; 2803 } 2804 2805 @Override 2806 public void show() { 2807 if (!(mTextView.getText() instanceof Editable)) return; 2808 2809 if (updateSuggestions()) { 2810 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 2811 mTextView.setCursorVisible(false); 2812 mIsShowingUp = true; 2813 super.show(); 2814 } 2815 } 2816 2817 @Override 2818 protected void measureContent() { 2819 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2820 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 2821 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 2822 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 2823 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 2824 2825 int width = 0; 2826 View view = null; 2827 for (int i = 0; i < mNumberOfSuggestions; i++) { 2828 view = mSuggestionsAdapter.getView(i, view, mContentView); 2829 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 2830 view.measure(horizontalMeasure, verticalMeasure); 2831 width = Math.max(width, view.getMeasuredWidth()); 2832 } 2833 2834 // Enforce the width based on actual text widths 2835 mContentView.measure( 2836 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 2837 verticalMeasure); 2838 2839 Drawable popupBackground = mPopupWindow.getBackground(); 2840 if (popupBackground != null) { 2841 if (mTempRect == null) mTempRect = new Rect(); 2842 popupBackground.getPadding(mTempRect); 2843 width += mTempRect.left + mTempRect.right; 2844 } 2845 mPopupWindow.setWidth(width); 2846 } 2847 2848 @Override 2849 protected int getTextOffset() { 2850 return mTextView.getSelectionStart(); 2851 } 2852 2853 @Override 2854 protected int getVerticalLocalPosition(int line) { 2855 return mTextView.getLayout().getLineBottom(line); 2856 } 2857 2858 @Override 2859 protected int clipVertically(int positionY) { 2860 final int height = mContentView.getMeasuredHeight(); 2861 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 2862 return Math.min(positionY, displayMetrics.heightPixels - height); 2863 } 2864 2865 @Override 2866 public void hide() { 2867 super.hide(); 2868 } 2869 2870 private boolean updateSuggestions() { 2871 Spannable spannable = (Spannable) mTextView.getText(); 2872 SuggestionSpan[] suggestionSpans = getSuggestionSpans(); 2873 2874 final int nbSpans = suggestionSpans.length; 2875 // Suggestions are shown after a delay: the underlying spans may have been removed 2876 if (nbSpans == 0) return false; 2877 2878 mNumberOfSuggestions = 0; 2879 int spanUnionStart = mTextView.getText().length(); 2880 int spanUnionEnd = 0; 2881 2882 SuggestionSpan misspelledSpan = null; 2883 int underlineColor = 0; 2884 2885 for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) { 2886 SuggestionSpan suggestionSpan = suggestionSpans[spanIndex]; 2887 final int spanStart = spannable.getSpanStart(suggestionSpan); 2888 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 2889 spanUnionStart = Math.min(spanStart, spanUnionStart); 2890 spanUnionEnd = Math.max(spanEnd, spanUnionEnd); 2891 2892 if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2893 misspelledSpan = suggestionSpan; 2894 } 2895 2896 // The first span dictates the background color of the highlighted text 2897 if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor(); 2898 2899 String[] suggestions = suggestionSpan.getSuggestions(); 2900 int nbSuggestions = suggestions.length; 2901 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 2902 String suggestion = suggestions[suggestionIndex]; 2903 2904 boolean suggestionIsDuplicate = false; 2905 for (int i = 0; i < mNumberOfSuggestions; i++) { 2906 if (mSuggestionInfos[i].text.toString().equals(suggestion)) { 2907 SuggestionSpan otherSuggestionSpan = mSuggestionInfos[i].suggestionSpan; 2908 final int otherSpanStart = spannable.getSpanStart(otherSuggestionSpan); 2909 final int otherSpanEnd = spannable.getSpanEnd(otherSuggestionSpan); 2910 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 2911 suggestionIsDuplicate = true; 2912 break; 2913 } 2914 } 2915 } 2916 2917 if (!suggestionIsDuplicate) { 2918 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2919 suggestionInfo.suggestionSpan = suggestionSpan; 2920 suggestionInfo.suggestionIndex = suggestionIndex; 2921 suggestionInfo.text.replace(0, suggestionInfo.text.length(), suggestion); 2922 2923 mNumberOfSuggestions++; 2924 2925 if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) { 2926 // Also end outer for loop 2927 spanIndex = nbSpans; 2928 break; 2929 } 2930 } 2931 } 2932 } 2933 2934 for (int i = 0; i < mNumberOfSuggestions; i++) { 2935 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 2936 } 2937 2938 // Add "Add to dictionary" item if there is a span with the misspelled flag 2939 if (misspelledSpan != null) { 2940 final int misspelledStart = spannable.getSpanStart(misspelledSpan); 2941 final int misspelledEnd = spannable.getSpanEnd(misspelledSpan); 2942 if (misspelledStart >= 0 && misspelledEnd > misspelledStart) { 2943 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2944 suggestionInfo.suggestionSpan = misspelledSpan; 2945 suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY; 2946 suggestionInfo.text.replace(0, suggestionInfo.text.length(), mTextView. 2947 getContext().getString(com.android.internal.R.string.addToDictionary)); 2948 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2949 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2950 2951 mNumberOfSuggestions++; 2952 } 2953 } 2954 2955 // Delete item 2956 SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions]; 2957 suggestionInfo.suggestionSpan = null; 2958 suggestionInfo.suggestionIndex = DELETE_TEXT; 2959 suggestionInfo.text.replace(0, suggestionInfo.text.length(), 2960 mTextView.getContext().getString(com.android.internal.R.string.deleteText)); 2961 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0, 2962 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2963 mNumberOfSuggestions++; 2964 2965 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 2966 if (underlineColor == 0) { 2967 // Fallback on the default highlight color when the first span does not provide one 2968 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 2969 } else { 2970 final float BACKGROUND_TRANSPARENCY = 0.4f; 2971 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 2972 mSuggestionRangeSpan.setBackgroundColor( 2973 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 2974 } 2975 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 2976 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2977 2978 mSuggestionsAdapter.notifyDataSetChanged(); 2979 return true; 2980 } 2981 2982 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 2983 int unionEnd) { 2984 final Spannable text = (Spannable) mTextView.getText(); 2985 final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan); 2986 final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan); 2987 2988 // Adjust the start/end of the suggestion span 2989 suggestionInfo.suggestionStart = spanStart - unionStart; 2990 suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart 2991 + suggestionInfo.text.length(); 2992 2993 suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 2994 suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 2995 2996 // Add the text before and after the span. 2997 final String textAsString = text.toString(); 2998 suggestionInfo.text.insert(0, textAsString.substring(unionStart, spanStart)); 2999 suggestionInfo.text.append(textAsString.substring(spanEnd, unionEnd)); 3000 } 3001 3002 @Override 3003 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3004 Editable editable = (Editable) mTextView.getText(); 3005 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3006 3007 if (suggestionInfo.suggestionIndex == DELETE_TEXT) { 3008 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3009 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3010 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3011 // Do not leave two adjacent spaces after deletion, or one at beginning of text 3012 if (spanUnionEnd < editable.length() && 3013 Character.isSpaceChar(editable.charAt(spanUnionEnd)) && 3014 (spanUnionStart == 0 || 3015 Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) { 3016 spanUnionEnd = spanUnionEnd + 1; 3017 } 3018 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3019 } 3020 hide(); 3021 return; 3022 } 3023 3024 final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan); 3025 final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan); 3026 if (spanStart < 0 || spanEnd <= spanStart) { 3027 // Span has been removed 3028 hide(); 3029 return; 3030 } 3031 3032 final String originalText = editable.toString().substring(spanStart, spanEnd); 3033 3034 if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) { 3035 Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3036 intent.putExtra("word", originalText); 3037 intent.putExtra("locale", mTextView.getTextServicesLocale().toString()); 3038 // Put a listener to replace the original text with a word which the user 3039 // modified in a user dictionary dialog. 3040 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3041 mTextView.getContext().startActivity(intent); 3042 // There is no way to know if the word was indeed added. Re-check. 3043 // TODO The ExtractEditText should remove the span in the original text instead 3044 editable.removeSpan(suggestionInfo.suggestionSpan); 3045 Selection.setSelection(editable, spanEnd); 3046 updateSpellCheckSpans(spanStart, spanEnd, false); 3047 } else { 3048 // SuggestionSpans are removed by replace: save them before 3049 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 3050 SuggestionSpan.class); 3051 final int length = suggestionSpans.length; 3052 int[] suggestionSpansStarts = new int[length]; 3053 int[] suggestionSpansEnds = new int[length]; 3054 int[] suggestionSpansFlags = new int[length]; 3055 for (int i = 0; i < length; i++) { 3056 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 3057 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 3058 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 3059 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 3060 3061 // Remove potential misspelled flags 3062 int suggestionSpanFlags = suggestionSpan.getFlags(); 3063 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) { 3064 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 3065 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 3066 suggestionSpan.setFlags(suggestionSpanFlags); 3067 } 3068 } 3069 3070 final int suggestionStart = suggestionInfo.suggestionStart; 3071 final int suggestionEnd = suggestionInfo.suggestionEnd; 3072 final String suggestion = suggestionInfo.text.subSequence( 3073 suggestionStart, suggestionEnd).toString(); 3074 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 3075 3076 // Notify source IME of the suggestion pick. Do this before 3077 // swaping texts. 3078 suggestionInfo.suggestionSpan.notifySelection( 3079 mTextView.getContext(), originalText, suggestionInfo.suggestionIndex); 3080 3081 // Swap text content between actual text and Suggestion span 3082 String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions(); 3083 suggestions[suggestionInfo.suggestionIndex] = originalText; 3084 3085 // Restore previous SuggestionSpans 3086 final int lengthDifference = suggestion.length() - (spanEnd - spanStart); 3087 for (int i = 0; i < length; i++) { 3088 // Only spans that include the modified region make sense after replacement 3089 // Spans partially included in the replaced region are removed, there is no 3090 // way to assign them a valid range after replacement 3091 if (suggestionSpansStarts[i] <= spanStart && 3092 suggestionSpansEnds[i] >= spanEnd) { 3093 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 3094 suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]); 3095 } 3096 } 3097 3098 // Move cursor at the end of the replaced word 3099 final int newCursorPosition = spanEnd + lengthDifference; 3100 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 3101 } 3102 3103 hide(); 3104 } 3105 } 3106 3107 /** 3108 * An ActionMode Callback class that is used to provide actions while in text insertion or 3109 * selection mode. 3110 * 3111 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3112 * actions, depending on which of these this TextView supports and the current selection. 3113 */ 3114 private class TextActionModeCallback extends ActionMode.Callback2 { 3115 private final Path mSelectionPath = new Path(); 3116 private final RectF mSelectionBounds = new RectF(); 3117 private final boolean mHasSelection; 3118 3119 private int mHandleHeight; 3120 3121 public TextActionModeCallback(boolean hasSelection) { 3122 mHasSelection = hasSelection; 3123 if (mHasSelection) { 3124 SelectionModifierCursorController selectionController = getSelectionController(); 3125 if (selectionController.mStartHandle == null) { 3126 // As these are for initializing selectionController, hide() must be called. 3127 selectionController.initDrawables(); 3128 selectionController.initHandles(); 3129 selectionController.hide(); 3130 } 3131 mHandleHeight = Math.max( 3132 mSelectHandleLeft.getMinimumHeight(), 3133 mSelectHandleRight.getMinimumHeight()); 3134 } else { 3135 InsertionPointCursorController insertionController = getInsertionController(); 3136 if (insertionController != null) { 3137 insertionController.getHandle(); 3138 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3139 } 3140 } 3141 } 3142 3143 @Override 3144 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3145 mode.setTitle(null); 3146 mode.setSubtitle(null); 3147 mode.setTitleOptionalHint(true); 3148 populateMenuWithItems(menu); 3149 3150 Callback customCallback = getCustomCallback(); 3151 if (customCallback != null) { 3152 if (!customCallback.onCreateActionMode(mode, menu)) { 3153 // The custom mode can choose to cancel the action mode, dismiss selection. 3154 Selection.setSelection((Spannable) mTextView.getText(), 3155 mTextView.getSelectionEnd()); 3156 return false; 3157 } 3158 } 3159 3160 addIntentMenuItemsForTextProcessing(menu); 3161 3162 if (menu.hasVisibleItems() || mode.getCustomView() != null) { 3163 mTextView.setHasTransientState(true); 3164 return true; 3165 } else { 3166 return false; 3167 } 3168 } 3169 3170 private Callback getCustomCallback() { 3171 return mHasSelection 3172 ? mCustomSelectionActionModeCallback 3173 : mCustomInsertionActionModeCallback; 3174 } 3175 3176 private void populateMenuWithItems(Menu menu) { 3177 if (mTextView.canCut()) { 3178 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3179 com.android.internal.R.string.cut). 3180 setAlphabeticShortcut('x'). 3181 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3182 } 3183 3184 if (mTextView.canCopy()) { 3185 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3186 com.android.internal.R.string.copy). 3187 setAlphabeticShortcut('c'). 3188 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3189 } 3190 3191 if (mTextView.canPaste()) { 3192 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3193 com.android.internal.R.string.paste). 3194 setAlphabeticShortcut('v'). 3195 setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3196 } 3197 3198 if (mTextView.canShare()) { 3199 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3200 com.android.internal.R.string.share). 3201 setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3202 } 3203 3204 updateSelectAllItem(menu); 3205 updateReplaceItem(menu); 3206 } 3207 3208 private void addIntentMenuItemsForTextProcessing(Menu menu) { 3209 if (mTextView.canProcessText()) { 3210 PackageManager packageManager = mTextView.getContext().getPackageManager(); 3211 List<ResolveInfo> supportedActivities = 3212 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 3213 for (int i = 0; i < supportedActivities.size(); ++i) { 3214 ResolveInfo info = supportedActivities.get(i); 3215 menu.add(Menu.NONE, Menu.NONE, 3216 MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i, 3217 info.loadLabel(packageManager)) 3218 .setIntent(createProcessTextIntentForResolveInfo(info)) 3219 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3220 } 3221 } 3222 } 3223 3224 private Intent createProcessTextIntent() { 3225 return new Intent() 3226 .setAction(Intent.ACTION_PROCESS_TEXT) 3227 .setType("text/plain"); 3228 } 3229 3230 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 3231 return createProcessTextIntent() 3232 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 3233 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 3234 } 3235 3236 @Override 3237 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 3238 updateSelectAllItem(menu); 3239 updateReplaceItem(menu); 3240 3241 Callback customCallback = getCustomCallback(); 3242 if (customCallback != null) { 3243 return customCallback.onPrepareActionMode(mode, menu); 3244 } 3245 return true; 3246 } 3247 3248 private void updateSelectAllItem(Menu menu) { 3249 boolean canSelectAll = mTextView.canSelectAllText(); 3250 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 3251 if (canSelectAll && !selectAllItemExists) { 3252 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 3253 com.android.internal.R.string.selectAll) 3254 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3255 } else if (!canSelectAll && selectAllItemExists) { 3256 menu.removeItem(TextView.ID_SELECT_ALL); 3257 } 3258 } 3259 3260 private void updateReplaceItem(Menu menu) { 3261 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 3262 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 3263 if (canReplace && !replaceItemExists) { 3264 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 3265 com.android.internal.R.string.replace) 3266 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3267 } else if (!canReplace && replaceItemExists) { 3268 menu.removeItem(TextView.ID_REPLACE); 3269 } 3270 } 3271 3272 @Override 3273 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 3274 if (item.getIntent() != null 3275 && item.getIntent().getAction().equals(Intent.ACTION_PROCESS_TEXT)) { 3276 item.getIntent().putExtra(Intent.EXTRA_PROCESS_TEXT, mTextView.getSelectedText()); 3277 mPreserveDetachedSelection = true; 3278 mTextView.startActivityForResult( 3279 item.getIntent(), TextView.PROCESS_TEXT_REQUEST_CODE); 3280 return true; 3281 } 3282 Callback customCallback = getCustomCallback(); 3283 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 3284 return true; 3285 } 3286 return mTextView.onTextContextMenuItem(item.getItemId()); 3287 } 3288 3289 @Override 3290 public void onDestroyActionMode(ActionMode mode) { 3291 Callback customCallback = getCustomCallback(); 3292 if (customCallback != null) { 3293 customCallback.onDestroyActionMode(mode); 3294 } 3295 3296 /* 3297 * If we're ending this mode because we're detaching from a window, 3298 * we still have selection state to preserve. Don't clear it, we'll 3299 * bring back the selection mode when (if) we get reattached. 3300 */ 3301 if (!mPreserveDetachedSelection) { 3302 Selection.setSelection((Spannable) mTextView.getText(), 3303 mTextView.getSelectionEnd()); 3304 mTextView.setHasTransientState(false); 3305 } 3306 3307 if (mSelectionModifierCursorController != null) { 3308 mSelectionModifierCursorController.hide(); 3309 } 3310 3311 mTextActionMode = null; 3312 } 3313 3314 @Override 3315 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 3316 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 3317 super.onGetContentRect(mode, view, outRect); 3318 return; 3319 } 3320 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 3321 // We have a selection. 3322 mSelectionPath.reset(); 3323 mTextView.getLayout().getSelectionPath( 3324 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 3325 mSelectionPath.computeBounds(mSelectionBounds, true); 3326 mSelectionBounds.bottom += mHandleHeight; 3327 } else if (mCursorCount == 2) { 3328 // We have a split cursor. In this case, we take the rectangle that includes both 3329 // parts of the cursor to ensure we don't obscure either of them. 3330 Rect firstCursorBounds = mCursorDrawable[0].getBounds(); 3331 Rect secondCursorBounds = mCursorDrawable[1].getBounds(); 3332 mSelectionBounds.set( 3333 Math.min(firstCursorBounds.left, secondCursorBounds.left), 3334 Math.min(firstCursorBounds.top, secondCursorBounds.top), 3335 Math.max(firstCursorBounds.right, secondCursorBounds.right), 3336 Math.max(firstCursorBounds.bottom, secondCursorBounds.bottom) 3337 + mHandleHeight); 3338 } else { 3339 // We have a single cursor. 3340 int line = mTextView.getLayout().getLineForOffset(mTextView.getSelectionStart()); 3341 float primaryHorizontal = 3342 mTextView.getLayout().getPrimaryHorizontal(mTextView.getSelectionStart()); 3343 mSelectionBounds.set( 3344 primaryHorizontal, 3345 mTextView.getLayout().getLineTop(line), 3346 primaryHorizontal + 1, 3347 mTextView.getLayout().getLineTop(line + 1) + mHandleHeight); 3348 } 3349 // Take TextView's padding and scroll into account. 3350 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 3351 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 3352 outRect.set( 3353 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 3354 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 3355 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 3356 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 3357 } 3358 } 3359 3360 /** 3361 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 3362 * while the input method is requesting the cursor/anchor position. Does nothing as long as 3363 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 3364 */ 3365 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 3366 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 3367 final int[] mTmpIntOffset = new int[2]; 3368 final Matrix mViewToScreenMatrix = new Matrix(); 3369 3370 @Override 3371 public void updatePosition(int parentPositionX, int parentPositionY, 3372 boolean parentPositionChanged, boolean parentScrolled) { 3373 final InputMethodState ims = mInputMethodState; 3374 if (ims == null || ims.mBatchEditNesting > 0) { 3375 return; 3376 } 3377 final InputMethodManager imm = InputMethodManager.peekInstance(); 3378 if (null == imm) { 3379 return; 3380 } 3381 if (!imm.isActive(mTextView)) { 3382 return; 3383 } 3384 // Skip if the IME has not requested the cursor/anchor position. 3385 if (!imm.isCursorAnchorInfoEnabled()) { 3386 return; 3387 } 3388 Layout layout = mTextView.getLayout(); 3389 if (layout == null) { 3390 return; 3391 } 3392 3393 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 3394 builder.reset(); 3395 3396 final int selectionStart = mTextView.getSelectionStart(); 3397 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 3398 3399 // Construct transformation matrix from view local coordinates to screen coordinates. 3400 mViewToScreenMatrix.set(mTextView.getMatrix()); 3401 mTextView.getLocationOnScreen(mTmpIntOffset); 3402 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 3403 builder.setMatrix(mViewToScreenMatrix); 3404 3405 final float viewportToContentHorizontalOffset = 3406 mTextView.viewportToContentHorizontalOffset(); 3407 final float viewportToContentVerticalOffset = 3408 mTextView.viewportToContentVerticalOffset(); 3409 3410 final CharSequence text = mTextView.getText(); 3411 if (text instanceof Spannable) { 3412 final Spannable sp = (Spannable) text; 3413 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 3414 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 3415 if (composingTextEnd < composingTextStart) { 3416 final int temp = composingTextEnd; 3417 composingTextEnd = composingTextStart; 3418 composingTextStart = temp; 3419 } 3420 final boolean hasComposingText = 3421 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 3422 if (hasComposingText) { 3423 final CharSequence composingText = text.subSequence(composingTextStart, 3424 composingTextEnd); 3425 builder.setComposingText(composingTextStart, composingText); 3426 3427 final int minLine = layout.getLineForOffset(composingTextStart); 3428 final int maxLine = layout.getLineForOffset(composingTextEnd - 1); 3429 for (int line = minLine; line <= maxLine; ++line) { 3430 final int lineStart = layout.getLineStart(line); 3431 final int lineEnd = layout.getLineEnd(line); 3432 final int offsetStart = Math.max(lineStart, composingTextStart); 3433 final int offsetEnd = Math.min(lineEnd, composingTextEnd); 3434 final boolean ltrLine = 3435 layout.getParagraphDirection(line) == Layout.DIR_LEFT_TO_RIGHT; 3436 final float[] widths = new float[offsetEnd - offsetStart]; 3437 layout.getPaint().getTextWidths(text, offsetStart, offsetEnd, widths); 3438 final float top = layout.getLineTop(line); 3439 final float bottom = layout.getLineBottom(line); 3440 for (int offset = offsetStart; offset < offsetEnd; ++offset) { 3441 final float charWidth = widths[offset - offsetStart]; 3442 final boolean isRtl = layout.isRtlCharAt(offset); 3443 final float primary = layout.getPrimaryHorizontal(offset); 3444 final float secondary = layout.getSecondaryHorizontal(offset); 3445 // TODO: This doesn't work perfectly for text with custom styles and 3446 // TAB chars. 3447 final float left; 3448 final float right; 3449 if (ltrLine) { 3450 if (isRtl) { 3451 left = secondary - charWidth; 3452 right = secondary; 3453 } else { 3454 left = primary; 3455 right = primary + charWidth; 3456 } 3457 } else { 3458 if (!isRtl) { 3459 left = secondary; 3460 right = secondary + charWidth; 3461 } else { 3462 left = primary - charWidth; 3463 right = primary; 3464 } 3465 } 3466 // TODO: Check top-right and bottom-left as well. 3467 final float localLeft = left + viewportToContentHorizontalOffset; 3468 final float localRight = right + viewportToContentHorizontalOffset; 3469 final float localTop = top + viewportToContentVerticalOffset; 3470 final float localBottom = bottom + viewportToContentVerticalOffset; 3471 final boolean isTopLeftVisible = isPositionVisible(localLeft, localTop); 3472 final boolean isBottomRightVisible = 3473 isPositionVisible(localRight, localBottom); 3474 int characterBoundsFlags = 0; 3475 if (isTopLeftVisible || isBottomRightVisible) { 3476 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3477 } 3478 if (!isTopLeftVisible || !isBottomRightVisible) { 3479 characterBoundsFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3480 } 3481 if (isRtl) { 3482 characterBoundsFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3483 } 3484 // Here offset is the index in Java chars. 3485 builder.addCharacterBounds(offset, localLeft, localTop, localRight, 3486 localBottom, characterBoundsFlags); 3487 } 3488 } 3489 } 3490 } 3491 3492 // Treat selectionStart as the insertion point. 3493 if (0 <= selectionStart) { 3494 final int offset = selectionStart; 3495 final int line = layout.getLineForOffset(offset); 3496 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 3497 + viewportToContentHorizontalOffset; 3498 final float insertionMarkerTop = layout.getLineTop(line) 3499 + viewportToContentVerticalOffset; 3500 final float insertionMarkerBaseline = layout.getLineBaseline(line) 3501 + viewportToContentVerticalOffset; 3502 final float insertionMarkerBottom = layout.getLineBottom(line) 3503 + viewportToContentVerticalOffset; 3504 final boolean isTopVisible = 3505 isPositionVisible(insertionMarkerX, insertionMarkerTop); 3506 final boolean isBottomVisible = 3507 isPositionVisible(insertionMarkerX, insertionMarkerBottom); 3508 int insertionMarkerFlags = 0; 3509 if (isTopVisible || isBottomVisible) { 3510 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 3511 } 3512 if (!isTopVisible || !isBottomVisible) { 3513 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 3514 } 3515 if (layout.isRtlCharAt(offset)) { 3516 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 3517 } 3518 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 3519 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 3520 } 3521 3522 imm.updateCursorAnchorInfo(mTextView, builder.build()); 3523 } 3524 } 3525 3526 private abstract class HandleView extends View implements TextViewPositionListener { 3527 protected Drawable mDrawable; 3528 protected Drawable mDrawableLtr; 3529 protected Drawable mDrawableRtl; 3530 private final PopupWindow mContainer; 3531 // Position with respect to the parent TextView 3532 private int mPositionX, mPositionY; 3533 private boolean mIsDragging; 3534 // Offset from touch position to mPosition 3535 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 3536 protected int mHotspotX; 3537 protected int mHorizontalGravity; 3538 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 3539 private float mTouchOffsetY; 3540 // Where the touch position should be on the handle to ensure a maximum cursor visibility 3541 private float mIdealVerticalOffset; 3542 // Parent's (TextView) previous position in window 3543 private int mLastParentX, mLastParentY; 3544 // Previous text character offset 3545 protected int mPreviousOffset = -1; 3546 // Previous text character offset 3547 private boolean mPositionHasChanged = true; 3548 // Minimum touch target size for handles 3549 private int mMinSize; 3550 // Indicates the line of text that the handle is on. 3551 protected int mPrevLine = -1; 3552 3553 public HandleView(Drawable drawableLtr, Drawable drawableRtl) { 3554 super(mTextView.getContext()); 3555 mContainer = new PopupWindow(mTextView.getContext(), null, 3556 com.android.internal.R.attr.textSelectHandleWindowStyle); 3557 mContainer.setSplitTouchEnabled(true); 3558 mContainer.setClippingEnabled(false); 3559 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 3560 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3561 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3562 mContainer.setContentView(this); 3563 3564 mDrawableLtr = drawableLtr; 3565 mDrawableRtl = drawableRtl; 3566 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 3567 com.android.internal.R.dimen.text_handle_min_size); 3568 3569 updateDrawable(); 3570 3571 final int handleHeight = getPreferredHeight(); 3572 mTouchOffsetY = -0.3f * handleHeight; 3573 mIdealVerticalOffset = 0.7f * handleHeight; 3574 } 3575 3576 public float getIdealVerticalOffset() { 3577 return mIdealVerticalOffset; 3578 } 3579 3580 protected void updateDrawable() { 3581 if (mIsDragging) { 3582 // Don't update drawable during dragging. 3583 return; 3584 } 3585 final int offset = getCurrentCursorOffset(); 3586 final boolean isRtlCharAtOffset = mTextView.getLayout().isRtlCharAt(offset); 3587 final Drawable oldDrawable = mDrawable; 3588 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 3589 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 3590 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 3591 final Layout layout = mTextView.getLayout(); 3592 if (layout != null && oldDrawable != mDrawable && isShowing()) { 3593 // Update popup window position. 3594 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3595 getHorizontalOffset() + getCursorOffset()); 3596 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3597 mPositionHasChanged = true; 3598 updatePosition(mLastParentX, mLastParentY, false, false); 3599 postInvalidate(); 3600 } 3601 } 3602 3603 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 3604 protected abstract int getHorizontalGravity(boolean isRtlRun); 3605 3606 // Touch-up filter: number of previous positions remembered 3607 private static final int HISTORY_SIZE = 5; 3608 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 3609 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 3610 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 3611 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 3612 private int mPreviousOffsetIndex = 0; 3613 private int mNumberPreviousOffsets = 0; 3614 3615 private void startTouchUpFilter(int offset) { 3616 mNumberPreviousOffsets = 0; 3617 addPositionToTouchUpFilter(offset); 3618 } 3619 3620 private void addPositionToTouchUpFilter(int offset) { 3621 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 3622 mPreviousOffsets[mPreviousOffsetIndex] = offset; 3623 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 3624 mNumberPreviousOffsets++; 3625 } 3626 3627 private void filterOnTouchUp() { 3628 final long now = SystemClock.uptimeMillis(); 3629 int i = 0; 3630 int index = mPreviousOffsetIndex; 3631 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 3632 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 3633 i++; 3634 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 3635 } 3636 3637 if (i > 0 && i < iMax && 3638 (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 3639 positionAtCursorOffset(mPreviousOffsets[index], false); 3640 } 3641 } 3642 3643 public boolean offsetHasBeenChanged() { 3644 return mNumberPreviousOffsets > 1; 3645 } 3646 3647 @Override 3648 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 3649 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 3650 } 3651 3652 private int getPreferredWidth() { 3653 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 3654 } 3655 3656 private int getPreferredHeight() { 3657 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 3658 } 3659 3660 public void show() { 3661 if (isShowing()) return; 3662 3663 getPositionListener().addSubscriber(this, true /* local position may change */); 3664 3665 // Make sure the offset is always considered new, even when focusing at same position 3666 mPreviousOffset = -1; 3667 positionAtCursorOffset(getCurrentCursorOffset(), false); 3668 } 3669 3670 protected void dismiss() { 3671 mIsDragging = false; 3672 mContainer.dismiss(); 3673 onDetached(); 3674 } 3675 3676 public void hide() { 3677 dismiss(); 3678 3679 getPositionListener().removeSubscriber(this); 3680 } 3681 3682 public boolean isShowing() { 3683 return mContainer.isShowing(); 3684 } 3685 3686 private boolean isVisible() { 3687 // Always show a dragging handle. 3688 if (mIsDragging) { 3689 return true; 3690 } 3691 3692 if (mTextView.isInBatchEditMode()) { 3693 return false; 3694 } 3695 3696 return isPositionVisible(mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 3697 } 3698 3699 public abstract int getCurrentCursorOffset(); 3700 3701 protected abstract void updateSelection(int offset); 3702 3703 public abstract void updatePosition(float x, float y); 3704 3705 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 3706 // A HandleView relies on the layout, which may be nulled by external methods 3707 Layout layout = mTextView.getLayout(); 3708 if (layout == null) { 3709 // Will update controllers' state, hiding them and stopping selection mode if needed 3710 prepareCursorControllers(); 3711 return; 3712 } 3713 3714 boolean offsetChanged = offset != mPreviousOffset; 3715 if (offsetChanged || parentScrolled) { 3716 if (offsetChanged) { 3717 updateSelection(offset); 3718 addPositionToTouchUpFilter(offset); 3719 } 3720 final int line = layout.getLineForOffset(offset); 3721 mPrevLine = line; 3722 3723 mPositionX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX - 3724 getHorizontalOffset() + getCursorOffset()); 3725 mPositionY = layout.getLineBottom(line); 3726 3727 // Take TextView's padding and scroll into account. 3728 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3729 mPositionY += mTextView.viewportToContentVerticalOffset(); 3730 3731 mPreviousOffset = offset; 3732 mPositionHasChanged = true; 3733 } 3734 } 3735 3736 public void updatePosition(int parentPositionX, int parentPositionY, 3737 boolean parentPositionChanged, boolean parentScrolled) { 3738 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled); 3739 if (parentPositionChanged || mPositionHasChanged) { 3740 if (mIsDragging) { 3741 // Update touchToWindow offset in case of parent scrolling while dragging 3742 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 3743 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 3744 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 3745 mLastParentX = parentPositionX; 3746 mLastParentY = parentPositionY; 3747 } 3748 3749 onHandleMoved(); 3750 } 3751 3752 if (isVisible()) { 3753 final int positionX = parentPositionX + mPositionX; 3754 final int positionY = parentPositionY + mPositionY; 3755 if (isShowing()) { 3756 mContainer.update(positionX, positionY, -1, -1); 3757 } else { 3758 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3759 positionX, positionY); 3760 } 3761 } else { 3762 if (isShowing()) { 3763 dismiss(); 3764 } 3765 } 3766 3767 mPositionHasChanged = false; 3768 } 3769 } 3770 3771 public void showAtLocation(int offset) { 3772 // TODO - investigate if there's a better way to show the handles 3773 // after the drag accelerator has occured. 3774 int[] tmpCords = new int[2]; 3775 mTextView.getLocationInWindow(tmpCords); 3776 3777 Layout layout = mTextView.getLayout(); 3778 int posX = tmpCords[0]; 3779 int posY = tmpCords[1]; 3780 3781 final int line = layout.getLineForOffset(offset); 3782 3783 int startX = (int) (layout.getPrimaryHorizontal(offset) - 0.5f 3784 - mHotspotX - getHorizontalOffset() + getCursorOffset()); 3785 int startY = layout.getLineBottom(line); 3786 3787 // Take TextView's padding and scroll into account. 3788 startX += mTextView.viewportToContentHorizontalOffset(); 3789 startY += mTextView.viewportToContentVerticalOffset(); 3790 3791 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3792 startX + posX, startY + posY); 3793 } 3794 3795 @Override 3796 protected void onDraw(Canvas c) { 3797 final int drawWidth = mDrawable.getIntrinsicWidth(); 3798 final int left = getHorizontalOffset(); 3799 3800 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 3801 mDrawable.draw(c); 3802 } 3803 3804 private int getHorizontalOffset() { 3805 final int width = getPreferredWidth(); 3806 final int drawWidth = mDrawable.getIntrinsicWidth(); 3807 final int left; 3808 switch (mHorizontalGravity) { 3809 case Gravity.LEFT: 3810 left = 0; 3811 break; 3812 default: 3813 case Gravity.CENTER: 3814 left = (width - drawWidth) / 2; 3815 break; 3816 case Gravity.RIGHT: 3817 left = width - drawWidth; 3818 break; 3819 } 3820 return left; 3821 } 3822 3823 protected int getCursorOffset() { 3824 return 0; 3825 } 3826 3827 @Override 3828 public boolean onTouchEvent(MotionEvent ev) { 3829 updateFloatingToolbarVisibility(ev); 3830 3831 switch (ev.getActionMasked()) { 3832 case MotionEvent.ACTION_DOWN: { 3833 startTouchUpFilter(getCurrentCursorOffset()); 3834 mTouchToWindowOffsetX = ev.getRawX() - mPositionX; 3835 mTouchToWindowOffsetY = ev.getRawY() - mPositionY; 3836 3837 final PositionListener positionListener = getPositionListener(); 3838 mLastParentX = positionListener.getPositionX(); 3839 mLastParentY = positionListener.getPositionY(); 3840 mIsDragging = true; 3841 break; 3842 } 3843 3844 case MotionEvent.ACTION_MOVE: { 3845 final float rawX = ev.getRawX(); 3846 final float rawY = ev.getRawY(); 3847 3848 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 3849 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 3850 final float currentVerticalOffset = rawY - mPositionY - mLastParentY; 3851 float newVerticalOffset; 3852 if (previousVerticalOffset < mIdealVerticalOffset) { 3853 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 3854 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 3855 } else { 3856 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 3857 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 3858 } 3859 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 3860 3861 final float newPosX = 3862 rawX - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 3863 final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY; 3864 3865 updatePosition(newPosX, newPosY); 3866 break; 3867 } 3868 3869 case MotionEvent.ACTION_UP: 3870 filterOnTouchUp(); 3871 mIsDragging = false; 3872 updateDrawable(); 3873 break; 3874 3875 case MotionEvent.ACTION_CANCEL: 3876 mIsDragging = false; 3877 updateDrawable(); 3878 break; 3879 } 3880 return true; 3881 } 3882 3883 public boolean isDragging() { 3884 return mIsDragging; 3885 } 3886 3887 void onHandleMoved() {} 3888 3889 public void onDetached() {} 3890 } 3891 3892 private class InsertionHandleView extends HandleView { 3893 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 3894 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 3895 3896 // Used to detect taps on the insertion handle, which will affect the insertion action mode 3897 private float mDownPositionX, mDownPositionY; 3898 private Runnable mHider; 3899 3900 public InsertionHandleView(Drawable drawable) { 3901 super(drawable, drawable); 3902 } 3903 3904 @Override 3905 public void show() { 3906 super.show(); 3907 3908 final long durationSinceCutOrCopy = 3909 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 3910 3911 // Cancel the single tap delayed runnable. 3912 if (mInsertionActionModeRunnable != null 3913 && (mDoubleTap || isCursorInsideEasyCorrectionSpan())) { 3914 mTextView.removeCallbacks(mInsertionActionModeRunnable); 3915 } 3916 3917 // Prepare and schedule the single tap runnable to run exactly after the double tap 3918 // timeout has passed. 3919 if (!mDoubleTap && !isCursorInsideEasyCorrectionSpan() 3920 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 3921 if (mTextActionMode == null) { 3922 if (mInsertionActionModeRunnable == null) { 3923 mInsertionActionModeRunnable = new Runnable() { 3924 @Override 3925 public void run() { 3926 startInsertionActionMode(); 3927 } 3928 }; 3929 } 3930 mTextView.postDelayed( 3931 mInsertionActionModeRunnable, 3932 ViewConfiguration.getDoubleTapTimeout() + 1); 3933 } 3934 3935 } 3936 3937 hideAfterDelay(); 3938 } 3939 3940 private void hideAfterDelay() { 3941 if (mHider == null) { 3942 mHider = new Runnable() { 3943 public void run() { 3944 hide(); 3945 } 3946 }; 3947 } else { 3948 removeHiderCallback(); 3949 } 3950 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 3951 } 3952 3953 private void removeHiderCallback() { 3954 if (mHider != null) { 3955 mTextView.removeCallbacks(mHider); 3956 } 3957 } 3958 3959 @Override 3960 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 3961 return drawable.getIntrinsicWidth() / 2; 3962 } 3963 3964 @Override 3965 protected int getHorizontalGravity(boolean isRtlRun) { 3966 return Gravity.CENTER_HORIZONTAL; 3967 } 3968 3969 @Override 3970 protected int getCursorOffset() { 3971 int offset = super.getCursorOffset(); 3972 final Drawable cursor = mCursorCount > 0 ? mCursorDrawable[0] : null; 3973 if (cursor != null) { 3974 cursor.getPadding(mTempRect); 3975 offset += (cursor.getIntrinsicWidth() - mTempRect.left - mTempRect.right) / 2; 3976 } 3977 return offset; 3978 } 3979 3980 @Override 3981 public boolean onTouchEvent(MotionEvent ev) { 3982 final boolean result = super.onTouchEvent(ev); 3983 3984 switch (ev.getActionMasked()) { 3985 case MotionEvent.ACTION_DOWN: 3986 mDownPositionX = ev.getRawX(); 3987 mDownPositionY = ev.getRawY(); 3988 break; 3989 3990 case MotionEvent.ACTION_UP: 3991 if (!offsetHasBeenChanged()) { 3992 final float deltaX = mDownPositionX - ev.getRawX(); 3993 final float deltaY = mDownPositionY - ev.getRawY(); 3994 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 3995 3996 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 3997 mTextView.getContext()); 3998 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 3999 4000 if (distanceSquared < touchSlop * touchSlop) { 4001 // Tapping on the handle toggles the insertion action mode. 4002 if (mTextActionMode != null) { 4003 mTextActionMode.finish(); 4004 } else { 4005 startInsertionActionMode(); 4006 } 4007 } 4008 } else { 4009 if (mTextActionMode != null) { 4010 mTextActionMode.invalidateContentRect(); 4011 } 4012 } 4013 hideAfterDelay(); 4014 break; 4015 4016 case MotionEvent.ACTION_CANCEL: 4017 hideAfterDelay(); 4018 break; 4019 4020 default: 4021 break; 4022 } 4023 4024 return result; 4025 } 4026 4027 @Override 4028 public int getCurrentCursorOffset() { 4029 return mTextView.getSelectionStart(); 4030 } 4031 4032 @Override 4033 public void updateSelection(int offset) { 4034 Selection.setSelection((Spannable) mTextView.getText(), offset); 4035 } 4036 4037 @Override 4038 public void updatePosition(float x, float y) { 4039 Layout layout = mTextView.getLayout(); 4040 int offset; 4041 if (layout != null) { 4042 int currLine = getCurrentLineAdjustedForSlop(layout, mPrevLine, y); 4043 offset = mTextView.getOffsetAtCoordinate(currLine, x); 4044 } else { 4045 offset = mTextView.getOffsetForPosition(x, y); 4046 } 4047 positionAtCursorOffset(offset, false); 4048 if (mTextActionMode != null) { 4049 mTextActionMode.invalidate(); 4050 } 4051 } 4052 4053 @Override 4054 void onHandleMoved() { 4055 super.onHandleMoved(); 4056 removeHiderCallback(); 4057 } 4058 4059 @Override 4060 public void onDetached() { 4061 super.onDetached(); 4062 removeHiderCallback(); 4063 } 4064 } 4065 4066 private class SelectionStartHandleView extends HandleView { 4067 // Indicates whether the cursor is making adjustments within a word. 4068 private boolean mInWord = false; 4069 // Difference between touch position and word boundary position. 4070 private float mTouchWordDelta; 4071 // X value of the previous updatePosition call. 4072 private float mPrevX; 4073 // Indicates if the handle has moved a boundary between LTR and RTL text. 4074 private boolean mLanguageDirectionChanged = false; 4075 4076 public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4077 super(drawableLtr, drawableRtl); 4078 } 4079 4080 @Override 4081 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4082 if (isRtlRun) { 4083 return drawable.getIntrinsicWidth() / 4; 4084 } else { 4085 return (drawable.getIntrinsicWidth() * 3) / 4; 4086 } 4087 } 4088 4089 @Override 4090 protected int getHorizontalGravity(boolean isRtlRun) { 4091 return isRtlRun ? Gravity.LEFT : Gravity.RIGHT; 4092 } 4093 4094 @Override 4095 public int getCurrentCursorOffset() { 4096 return mTextView.getSelectionStart(); 4097 } 4098 4099 @Override 4100 public void updateSelection(int offset) { 4101 Selection.setSelection((Spannable) mTextView.getText(), offset, 4102 mTextView.getSelectionEnd()); 4103 updateDrawable(); 4104 if (mTextActionMode != null) { 4105 mTextActionMode.invalidate(); 4106 } 4107 } 4108 4109 @Override 4110 public void updatePosition(float x, float y) { 4111 final Layout layout = mTextView.getLayout(); 4112 if (layout == null) { 4113 // HandleView will deal appropriately in positionAtCursorOffset when 4114 // layout is null. 4115 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 4116 return; 4117 } 4118 4119 boolean positionCursor = false; 4120 final int selectionEnd = mTextView.getSelectionEnd(); 4121 int currLine = getCurrentLineAdjustedForSlop(layout, mPrevLine, y); 4122 int initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4123 4124 if (initialOffset >= selectionEnd) { 4125 // Handles have crossed, bound it to the last selected line and 4126 // adjust by word / char as normal. 4127 currLine = layout.getLineForOffset(selectionEnd); 4128 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4129 } 4130 4131 int offset = initialOffset; 4132 int end = getWordEnd(offset); 4133 int start = getWordStart(offset); 4134 4135 if (mPrevX == UNSET_X_VALUE) { 4136 mPrevX = x; 4137 } 4138 4139 final int selectionStart = mTextView.getSelectionStart(); 4140 final boolean selectionStartRtl = layout.isRtlCharAt(selectionStart); 4141 final boolean atRtl = layout.isRtlCharAt(offset); 4142 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4143 boolean isExpanding; 4144 4145 // We can't determine if the user is expanding or shrinking the selection if they're 4146 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4147 // the cursor at the current position. 4148 if (isLvlBoundary || (selectionStartRtl && !atRtl) || (!selectionStartRtl && atRtl)) { 4149 // We're on a boundary or this is the first direction change -- just update 4150 // to the current position. 4151 mLanguageDirectionChanged = true; 4152 mTouchWordDelta = 0.0f; 4153 positionAtCursorOffset(offset, false); 4154 return; 4155 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4156 // We've just moved past the boundary so update the position. After this we can 4157 // figure out if the user is expanding or shrinking to go by word or character. 4158 positionAtCursorOffset(offset, false); 4159 mTouchWordDelta = 0.0f; 4160 mLanguageDirectionChanged = false; 4161 return; 4162 } else { 4163 final float xDiff = x - mPrevX; 4164 if (atRtl) { 4165 isExpanding = xDiff > 0 || currLine > mPrevLine; 4166 } else { 4167 isExpanding = xDiff < 0 || currLine < mPrevLine; 4168 } 4169 } 4170 4171 if (isExpanding) { 4172 // User is increasing the selection. 4173 if (!mInWord || currLine < mPrevLine) { 4174 // We're not in a word, or we're on a different line so we'll expand by 4175 // word. First ensure the user has at least entered the next word. 4176 int offsetToWord = (end - start) / 2; 4177 if (offset <= end - offsetToWord || currLine < mPrevLine) { 4178 offset = start; 4179 } else { 4180 offset = mPreviousOffset; 4181 } 4182 } 4183 if (layout != null && offset < initialOffset) { 4184 final float adjustedX = layout.getPrimaryHorizontal(offset); 4185 mTouchWordDelta = 4186 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4187 } else { 4188 mTouchWordDelta = 0.0f; 4189 } 4190 positionCursor = true; 4191 } else { 4192 final int adjustedOffset = 4193 mTextView.getOffsetAtCoordinate(currLine, x - mTouchWordDelta); 4194 if (adjustedOffset > mPreviousOffset || currLine > mPrevLine) { 4195 // User is shrinking the selection. 4196 if (currLine > mPrevLine) { 4197 // We're on a different line, so we'll snap to word boundaries. 4198 offset = start; 4199 if (layout != null && offset < initialOffset) { 4200 final float adjustedX = layout.getPrimaryHorizontal(offset); 4201 mTouchWordDelta = 4202 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 4203 } else { 4204 mTouchWordDelta = 0.0f; 4205 } 4206 } else { 4207 offset = adjustedOffset; 4208 } 4209 positionCursor = true; 4210 } else if (adjustedOffset < mPreviousOffset) { 4211 // Handle has jumped to the start of the word, and the user is moving 4212 // their finger towards the handle, the delta should be updated. 4213 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 4214 - layout.getPrimaryHorizontal(mPreviousOffset); 4215 } 4216 } 4217 4218 if (positionCursor) { 4219 // Handles can not cross and selection is at least one character. 4220 if (offset >= selectionEnd) { 4221 offset = getNextCursorOffset(selectionEnd, false); 4222 mTouchWordDelta = 0.0f; 4223 } 4224 positionAtCursorOffset(offset, false); 4225 } 4226 mPrevX = x; 4227 } 4228 4229 @Override 4230 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4231 super.positionAtCursorOffset(offset, parentScrolled); 4232 mInWord = !getWordIteratorWithText().isBoundary(offset); 4233 } 4234 4235 @Override 4236 public boolean onTouchEvent(MotionEvent event) { 4237 boolean superResult = super.onTouchEvent(event); 4238 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4239 // Reset the touch word offset when the user has lifted their finger. 4240 mTouchWordDelta = 0.0f; 4241 mPrevX = UNSET_X_VALUE; 4242 } 4243 return superResult; 4244 } 4245 } 4246 4247 private class SelectionEndHandleView extends HandleView { 4248 // Indicates whether the cursor is making adjustments within a word. 4249 private boolean mInWord = false; 4250 // Difference between touch position and word boundary position. 4251 private float mTouchWordDelta; 4252 // X value of the previous updatePosition call. 4253 private float mPrevX; 4254 // Indicates if the handle has moved a boundary between LTR and RTL text. 4255 private boolean mLanguageDirectionChanged = false; 4256 4257 public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) { 4258 super(drawableLtr, drawableRtl); 4259 } 4260 4261 @Override 4262 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 4263 if (isRtlRun) { 4264 return (drawable.getIntrinsicWidth() * 3) / 4; 4265 } else { 4266 return drawable.getIntrinsicWidth() / 4; 4267 } 4268 } 4269 4270 @Override 4271 protected int getHorizontalGravity(boolean isRtlRun) { 4272 return isRtlRun ? Gravity.RIGHT : Gravity.LEFT; 4273 } 4274 4275 @Override 4276 public int getCurrentCursorOffset() { 4277 return mTextView.getSelectionEnd(); 4278 } 4279 4280 @Override 4281 public void updateSelection(int offset) { 4282 Selection.setSelection((Spannable) mTextView.getText(), 4283 mTextView.getSelectionStart(), offset); 4284 if (mTextActionMode != null) { 4285 mTextActionMode.invalidate(); 4286 } 4287 updateDrawable(); 4288 } 4289 4290 @Override 4291 public void updatePosition(float x, float y) { 4292 final Layout layout = mTextView.getLayout(); 4293 if (layout == null) { 4294 // HandleView will deal appropriately in positionAtCursorOffset when 4295 // layout is null. 4296 positionAtCursorOffset(mTextView.getOffsetForPosition(x, y), false); 4297 return; 4298 } 4299 4300 boolean positionCursor = false; 4301 final int selectionStart = mTextView.getSelectionStart(); 4302 int currLine = getCurrentLineAdjustedForSlop(layout, mPrevLine, y); 4303 int initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4304 4305 if (initialOffset <= selectionStart) { 4306 // Handles have crossed, bound it to the first selected line and 4307 // adjust by word / char as normal. 4308 currLine = layout.getLineForOffset(selectionStart); 4309 initialOffset = mTextView.getOffsetAtCoordinate(currLine, x); 4310 } 4311 4312 int offset = initialOffset; 4313 int end = getWordEnd(offset); 4314 int start = getWordStart(offset); 4315 4316 if (mPrevX == UNSET_X_VALUE) { 4317 mPrevX = x; 4318 } 4319 4320 final int selectionEnd = mTextView.getSelectionEnd(); 4321 final boolean selectionEndRtl = layout.isRtlCharAt(selectionEnd); 4322 final boolean atRtl = layout.isRtlCharAt(offset); 4323 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 4324 boolean isExpanding; 4325 4326 // We can't determine if the user is expanding or shrinking the selection if they're 4327 // on a bi-di boundary, so until they've moved past the boundary we'll just place 4328 // the cursor at the current position. 4329 if (isLvlBoundary || (selectionEndRtl && !atRtl) || (!selectionEndRtl && atRtl)) { 4330 // We're on a boundary or this is the first direction change -- just update 4331 // to the current position. 4332 mLanguageDirectionChanged = true; 4333 mTouchWordDelta = 0.0f; 4334 positionAtCursorOffset(offset, false); 4335 return; 4336 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 4337 // We've just moved past the boundary so update the position. After this we can 4338 // figure out if the user is expanding or shrinking to go by word or character. 4339 positionAtCursorOffset(offset, false); 4340 mTouchWordDelta = 0.0f; 4341 mLanguageDirectionChanged = false; 4342 return; 4343 } else { 4344 final float xDiff = x - mPrevX; 4345 if (atRtl) { 4346 isExpanding = xDiff < 0 || currLine < mPrevLine; 4347 } else { 4348 isExpanding = xDiff > 0 || currLine > mPrevLine; 4349 } 4350 } 4351 4352 if (isExpanding) { 4353 // User is increasing the selection. 4354 if (!mInWord || currLine > mPrevLine) { 4355 // We're not in a word, or we're on a different line so we'll expand by 4356 // word. First ensure the user has at least entered the next word. 4357 int midPoint = (end - start) / 2; 4358 if (offset >= start + midPoint || currLine > mPrevLine) { 4359 offset = end; 4360 } else { 4361 offset = mPreviousOffset; 4362 } 4363 } 4364 if (offset > initialOffset) { 4365 final float adjustedX = layout.getPrimaryHorizontal(offset); 4366 mTouchWordDelta = 4367 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4368 } else { 4369 mTouchWordDelta = 0.0f; 4370 } 4371 positionCursor = true; 4372 } else { 4373 final int adjustedOffset = 4374 mTextView.getOffsetAtCoordinate(currLine, x + mTouchWordDelta); 4375 if (adjustedOffset < mPreviousOffset || currLine < mPrevLine) { 4376 // User is shrinking the selection. 4377 if (currLine < mPrevLine) { 4378 // We're on a different line, so we'll snap to word boundaries. 4379 offset = end; 4380 if (offset > initialOffset) { 4381 final float adjustedX = layout.getPrimaryHorizontal(offset); 4382 mTouchWordDelta = 4383 adjustedX - mTextView.convertToLocalHorizontalCoordinate(x); 4384 } else { 4385 mTouchWordDelta = 0.0f; 4386 } 4387 } else { 4388 offset = adjustedOffset; 4389 } 4390 positionCursor = true; 4391 } else if (adjustedOffset > mPreviousOffset) { 4392 // Handle has jumped to the end of the word, and the user is moving 4393 // their finger towards the handle, the delta should be updated. 4394 mTouchWordDelta = layout.getPrimaryHorizontal(mPreviousOffset) 4395 - mTextView.convertToLocalHorizontalCoordinate(x); 4396 } 4397 } 4398 4399 if (positionCursor) { 4400 // Handles can not cross and selection is at least one character. 4401 if (offset <= selectionStart) { 4402 offset = getNextCursorOffset(selectionStart, true); 4403 mTouchWordDelta = 0.0f; 4404 } 4405 positionAtCursorOffset(offset, false); 4406 } 4407 mPrevX = x; 4408 } 4409 4410 @Override 4411 protected void positionAtCursorOffset(int offset, boolean parentScrolled) { 4412 super.positionAtCursorOffset(offset, parentScrolled); 4413 mInWord = !getWordIteratorWithText().isBoundary(offset); 4414 } 4415 4416 @Override 4417 public boolean onTouchEvent(MotionEvent event) { 4418 boolean superResult = super.onTouchEvent(event); 4419 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 4420 // Reset the touch word offset when the user has lifted their finger. 4421 mTouchWordDelta = 0.0f; 4422 mPrevX = UNSET_X_VALUE; 4423 } 4424 return superResult; 4425 } 4426 } 4427 4428 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 4429 if (layout == null || prevLine > layout.getLineCount() 4430 || layout.getLineCount() <= 0 || prevLine < 0) { 4431 // Invalid parameters, just return whatever line is at y. 4432 return mTextView.getLineAtCoordinate(y); 4433 } 4434 4435 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 4436 final int lineCount = layout.getLineCount(); 4437 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 4438 4439 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 4440 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 4441 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 4442 4443 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 4444 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 4445 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 4446 4447 // Determine if we've moved lines based on y position and previous line. 4448 int currLine; 4449 if (y <= yTopBound) { 4450 currLine = Math.max(prevLine - 1, 0); 4451 } else if (y >= yBottomBound) { 4452 currLine = Math.min(prevLine + 1, lineCount - 1); 4453 } else { 4454 currLine = prevLine; 4455 } 4456 return currLine; 4457 } 4458 4459 /** 4460 * A CursorController instance can be used to control a cursor in the text. 4461 */ 4462 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 4463 /** 4464 * Makes the cursor controller visible on screen. 4465 * See also {@link #hide()}. 4466 */ 4467 public void show(); 4468 4469 /** 4470 * Hide the cursor controller from screen. 4471 * See also {@link #show()}. 4472 */ 4473 public void hide(); 4474 4475 /** 4476 * Called when the view is detached from window. Perform house keeping task, such as 4477 * stopping Runnable thread that would otherwise keep a reference on the context, thus 4478 * preventing the activity from being recycled. 4479 */ 4480 public void onDetached(); 4481 } 4482 4483 private class InsertionPointCursorController implements CursorController { 4484 private InsertionHandleView mHandle; 4485 4486 public void show() { 4487 getHandle().show(); 4488 4489 if (mSelectionModifierCursorController != null) { 4490 mSelectionModifierCursorController.hide(); 4491 } 4492 } 4493 4494 public void hide() { 4495 if (mHandle != null) { 4496 mHandle.hide(); 4497 } 4498 } 4499 4500 public void onTouchModeChanged(boolean isInTouchMode) { 4501 if (!isInTouchMode) { 4502 hide(); 4503 } 4504 } 4505 4506 private InsertionHandleView getHandle() { 4507 if (mSelectHandleCenter == null) { 4508 mSelectHandleCenter = mTextView.getContext().getDrawable( 4509 mTextView.mTextSelectHandleRes); 4510 } 4511 if (mHandle == null) { 4512 mHandle = new InsertionHandleView(mSelectHandleCenter); 4513 } 4514 return mHandle; 4515 } 4516 4517 @Override 4518 public void onDetached() { 4519 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4520 observer.removeOnTouchModeChangeListener(this); 4521 4522 if (mHandle != null) mHandle.onDetached(); 4523 } 4524 } 4525 4526 class SelectionModifierCursorController implements CursorController { 4527 // The cursor controller handles, lazily created when shown. 4528 private SelectionStartHandleView mStartHandle; 4529 private SelectionEndHandleView mEndHandle; 4530 // The offsets of that last touch down event. Remembered to start selection there. 4531 private int mMinTouchOffset, mMaxTouchOffset; 4532 4533 private float mDownPositionX, mDownPositionY; 4534 private boolean mGestureStayedInTapRegion; 4535 4536 // Where the user first starts the drag motion. 4537 private int mStartOffset = -1; 4538 // Indicates whether the user is selecting text and using the drag accelerator. 4539 private boolean mDragAcceleratorActive; 4540 private boolean mHaventMovedEnoughToStartDrag; 4541 // The line that a selection happened most recently with the drag accelerator. 4542 private int mLineSelectionIsOn = -1; 4543 // Whether the drag accelerator has selected past the initial line. 4544 private boolean mSwitchedLines = false; 4545 4546 SelectionModifierCursorController() { 4547 resetTouchOffsets(); 4548 } 4549 4550 public void show() { 4551 if (mTextView.isInBatchEditMode()) { 4552 return; 4553 } 4554 initDrawables(); 4555 initHandles(); 4556 hideInsertionPointCursorController(); 4557 } 4558 4559 private void initDrawables() { 4560 if (mSelectHandleLeft == null) { 4561 mSelectHandleLeft = mTextView.getContext().getDrawable( 4562 mTextView.mTextSelectHandleLeftRes); 4563 } 4564 if (mSelectHandleRight == null) { 4565 mSelectHandleRight = mTextView.getContext().getDrawable( 4566 mTextView.mTextSelectHandleRightRes); 4567 } 4568 } 4569 4570 private void initHandles() { 4571 // Lazy object creation has to be done before updatePosition() is called. 4572 if (mStartHandle == null) { 4573 mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight); 4574 } 4575 if (mEndHandle == null) { 4576 mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft); 4577 } 4578 4579 mStartHandle.show(); 4580 mEndHandle.show(); 4581 4582 hideInsertionPointCursorController(); 4583 } 4584 4585 public void hide() { 4586 if (mStartHandle != null) mStartHandle.hide(); 4587 if (mEndHandle != null) mEndHandle.hide(); 4588 } 4589 4590 public void enterDrag() { 4591 // Just need to init the handles / hide insertion cursor. 4592 show(); 4593 mDragAcceleratorActive = true; 4594 // Start location of selection. 4595 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 4596 mLastDownPositionY); 4597 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 4598 // Don't show the handles until user has lifted finger. 4599 hide(); 4600 4601 // This stops scrolling parents from intercepting the touch event, allowing 4602 // the user to continue dragging across the screen to select text; TextView will 4603 // scroll as necessary. 4604 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 4605 } 4606 4607 public void onTouchEvent(MotionEvent event) { 4608 // This is done even when the View does not have focus, so that long presses can start 4609 // selection and tap can move cursor from this tap position. 4610 final float eventX = event.getX(); 4611 final float eventY = event.getY(); 4612 switch (event.getActionMasked()) { 4613 case MotionEvent.ACTION_DOWN: 4614 if (extractedTextModeWillBeStarted()) { 4615 // Prevent duplicating the selection handles until the mode starts. 4616 hide(); 4617 } else { 4618 // Remember finger down position, to be able to start selection from there. 4619 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 4620 eventX, eventY); 4621 4622 // Double tap detection 4623 if (mGestureStayedInTapRegion) { 4624 if (mDoubleTap) { 4625 final float deltaX = eventX - mDownPositionX; 4626 final float deltaY = eventY - mDownPositionY; 4627 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4628 4629 ViewConfiguration viewConfiguration = ViewConfiguration.get( 4630 mTextView.getContext()); 4631 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 4632 boolean stayedInArea = 4633 distanceSquared < doubleTapSlop * doubleTapSlop; 4634 4635 if (stayedInArea && isPositionOnText(eventX, eventY)) { 4636 selectCurrentWordAndStartDrag(); 4637 mDiscardNextActionUp = true; 4638 } 4639 } 4640 } 4641 4642 mDownPositionX = eventX; 4643 mDownPositionY = eventY; 4644 mGestureStayedInTapRegion = true; 4645 mHaventMovedEnoughToStartDrag = true; 4646 } 4647 break; 4648 4649 case MotionEvent.ACTION_POINTER_DOWN: 4650 case MotionEvent.ACTION_POINTER_UP: 4651 // Handle multi-point gestures. Keep min and max offset positions. 4652 // Only activated for devices that correctly handle multi-touch. 4653 if (mTextView.getContext().getPackageManager().hasSystemFeature( 4654 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 4655 updateMinAndMaxOffsets(event); 4656 } 4657 break; 4658 4659 case MotionEvent.ACTION_MOVE: 4660 final ViewConfiguration viewConfig = ViewConfiguration.get( 4661 mTextView.getContext()); 4662 final int touchSlop = viewConfig.getScaledTouchSlop(); 4663 4664 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 4665 final float deltaX = eventX - mDownPositionX; 4666 final float deltaY = eventY - mDownPositionY; 4667 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 4668 4669 if (mGestureStayedInTapRegion) { 4670 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 4671 mGestureStayedInTapRegion = 4672 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 4673 } 4674 if (mHaventMovedEnoughToStartDrag) { 4675 // We don't start dragging until the user has moved enough. 4676 mHaventMovedEnoughToStartDrag = 4677 distanceSquared <= touchSlop * touchSlop; 4678 } 4679 } 4680 4681 if (mStartHandle != null && mStartHandle.isShowing()) { 4682 // Don't do the drag if the handles are showing already. 4683 break; 4684 } 4685 4686 if (mStartOffset != -1 && mTextView.getLayout() != null) { 4687 if (!mHaventMovedEnoughToStartDrag) { 4688 4689 float y = eventY; 4690 if (mSwitchedLines) { 4691 // Offset the finger by the same vertical offset as the handles. 4692 // This improves visibility of the content being selected by 4693 // shifting the finger below the content, this is applied once 4694 // the user has switched lines. 4695 final float fingerOffset = (mStartHandle != null) 4696 ? mStartHandle.getIdealVerticalOffset() 4697 : touchSlop; 4698 y = eventY - fingerOffset; 4699 } 4700 4701 final int currLine = getCurrentLineAdjustedForSlop( 4702 mTextView.getLayout(), 4703 mLineSelectionIsOn, y); 4704 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 4705 // Break early here, we want to offset the finger position from 4706 // the selection highlight, once the user moved their finger 4707 // to a different line we should apply the offset and *not* switch 4708 // lines until recomputing the position with the finger offset. 4709 mSwitchedLines = true; 4710 break; 4711 } 4712 4713 int startOffset; 4714 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 4715 // Snap to word boundaries. 4716 if (mStartOffset < offset) { 4717 // Expanding with end handle. 4718 offset = getWordEnd(offset); 4719 startOffset = getWordStart(mStartOffset); 4720 } else { 4721 // Expanding with start handle. 4722 offset = getWordStart(offset); 4723 startOffset = getWordEnd(mStartOffset); 4724 } 4725 mLineSelectionIsOn = currLine; 4726 Selection.setSelection((Spannable) mTextView.getText(), 4727 startOffset, offset); 4728 } 4729 } 4730 break; 4731 4732 case MotionEvent.ACTION_UP: 4733 if (mDragAcceleratorActive) { 4734 // No longer dragging to select text, let the parent intercept events. 4735 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 4736 4737 show(); 4738 int startOffset = mTextView.getSelectionStart(); 4739 int endOffset = mTextView.getSelectionEnd(); 4740 4741 // Since we don't let drag handles pass once they're visible, we need to 4742 // make sure the start / end locations are correct because the user *can* 4743 // switch directions during the initial drag. 4744 if (endOffset < startOffset) { 4745 int tmp = endOffset; 4746 endOffset = startOffset; 4747 startOffset = tmp; 4748 4749 // Also update the selection with the right offsets in this case. 4750 Selection.setSelection((Spannable) mTextView.getText(), 4751 startOffset, endOffset); 4752 } 4753 4754 // Need to do this to display the handles. 4755 mStartHandle.showAtLocation(startOffset); 4756 mEndHandle.showAtLocation(endOffset); 4757 4758 // No longer the first dragging motion, reset. 4759 if (!(mTextView.isInExtractedMode())) { 4760 startSelectionActionMode(); 4761 } 4762 mDragAcceleratorActive = false; 4763 mStartOffset = -1; 4764 mSwitchedLines = false; 4765 } 4766 break; 4767 } 4768 } 4769 4770 /** 4771 * @param event 4772 */ 4773 private void updateMinAndMaxOffsets(MotionEvent event) { 4774 int pointerCount = event.getPointerCount(); 4775 for (int index = 0; index < pointerCount; index++) { 4776 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 4777 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 4778 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 4779 } 4780 } 4781 4782 public int getMinTouchOffset() { 4783 return mMinTouchOffset; 4784 } 4785 4786 public int getMaxTouchOffset() { 4787 return mMaxTouchOffset; 4788 } 4789 4790 public void resetTouchOffsets() { 4791 mMinTouchOffset = mMaxTouchOffset = -1; 4792 mStartOffset = -1; 4793 mDragAcceleratorActive = false; 4794 mSwitchedLines = false; 4795 } 4796 4797 /** 4798 * @return true iff this controller is currently used to move the selection start. 4799 */ 4800 public boolean isSelectionStartDragged() { 4801 return mStartHandle != null && mStartHandle.isDragging(); 4802 } 4803 4804 /** 4805 * @return true if the user is selecting text using the drag accelerator. 4806 */ 4807 public boolean isDragAcceleratorActive() { 4808 return mDragAcceleratorActive; 4809 } 4810 4811 public void onTouchModeChanged(boolean isInTouchMode) { 4812 if (!isInTouchMode) { 4813 hide(); 4814 } 4815 } 4816 4817 @Override 4818 public void onDetached() { 4819 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 4820 observer.removeOnTouchModeChangeListener(this); 4821 4822 if (mStartHandle != null) mStartHandle.onDetached(); 4823 if (mEndHandle != null) mEndHandle.onDetached(); 4824 } 4825 } 4826 4827 private class CorrectionHighlighter { 4828 private final Path mPath = new Path(); 4829 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 4830 private int mStart, mEnd; 4831 private long mFadingStartTime; 4832 private RectF mTempRectF; 4833 private final static int FADE_OUT_DURATION = 400; 4834 4835 public CorrectionHighlighter() { 4836 mPaint.setCompatibilityScaling(mTextView.getResources().getCompatibilityInfo(). 4837 applicationScale); 4838 mPaint.setStyle(Paint.Style.FILL); 4839 } 4840 4841 public void highlight(CorrectionInfo info) { 4842 mStart = info.getOffset(); 4843 mEnd = mStart + info.getNewText().length(); 4844 mFadingStartTime = SystemClock.uptimeMillis(); 4845 4846 if (mStart < 0 || mEnd < 0) { 4847 stopAnimation(); 4848 } 4849 } 4850 4851 public void draw(Canvas canvas, int cursorOffsetVertical) { 4852 if (updatePath() && updatePaint()) { 4853 if (cursorOffsetVertical != 0) { 4854 canvas.translate(0, cursorOffsetVertical); 4855 } 4856 4857 canvas.drawPath(mPath, mPaint); 4858 4859 if (cursorOffsetVertical != 0) { 4860 canvas.translate(0, -cursorOffsetVertical); 4861 } 4862 invalidate(true); // TODO invalidate cursor region only 4863 } else { 4864 stopAnimation(); 4865 invalidate(false); // TODO invalidate cursor region only 4866 } 4867 } 4868 4869 private boolean updatePaint() { 4870 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 4871 if (duration > FADE_OUT_DURATION) return false; 4872 4873 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 4874 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 4875 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) + 4876 ((int) (highlightColorAlpha * coef) << 24); 4877 mPaint.setColor(color); 4878 return true; 4879 } 4880 4881 private boolean updatePath() { 4882 final Layout layout = mTextView.getLayout(); 4883 if (layout == null) return false; 4884 4885 // Update in case text is edited while the animation is run 4886 final int length = mTextView.getText().length(); 4887 int start = Math.min(length, mStart); 4888 int end = Math.min(length, mEnd); 4889 4890 mPath.reset(); 4891 layout.getSelectionPath(start, end, mPath); 4892 return true; 4893 } 4894 4895 private void invalidate(boolean delayed) { 4896 if (mTextView.getLayout() == null) return; 4897 4898 if (mTempRectF == null) mTempRectF = new RectF(); 4899 mPath.computeBounds(mTempRectF, false); 4900 4901 int left = mTextView.getCompoundPaddingLeft(); 4902 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 4903 4904 if (delayed) { 4905 mTextView.postInvalidateOnAnimation( 4906 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 4907 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 4908 } else { 4909 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 4910 (int) mTempRectF.right, (int) mTempRectF.bottom); 4911 } 4912 } 4913 4914 private void stopAnimation() { 4915 Editor.this.mCorrectionHighlighter = null; 4916 } 4917 } 4918 4919 private static class ErrorPopup extends PopupWindow { 4920 private boolean mAbove = false; 4921 private final TextView mView; 4922 private int mPopupInlineErrorBackgroundId = 0; 4923 private int mPopupInlineErrorAboveBackgroundId = 0; 4924 4925 ErrorPopup(TextView v, int width, int height) { 4926 super(v, width, height); 4927 mView = v; 4928 // Make sure the TextView has a background set as it will be used the first time it is 4929 // shown and positioned. Initialized with below background, which should have 4930 // dimensions identical to the above version for this to work (and is more likely). 4931 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4932 com.android.internal.R.styleable.Theme_errorMessageBackground); 4933 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 4934 } 4935 4936 void fixDirection(boolean above) { 4937 mAbove = above; 4938 4939 if (above) { 4940 mPopupInlineErrorAboveBackgroundId = 4941 getResourceId(mPopupInlineErrorAboveBackgroundId, 4942 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 4943 } else { 4944 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 4945 com.android.internal.R.styleable.Theme_errorMessageBackground); 4946 } 4947 4948 mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId : 4949 mPopupInlineErrorBackgroundId); 4950 } 4951 4952 private int getResourceId(int currentId, int index) { 4953 if (currentId == 0) { 4954 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 4955 R.styleable.Theme); 4956 currentId = styledAttributes.getResourceId(index, 0); 4957 styledAttributes.recycle(); 4958 } 4959 return currentId; 4960 } 4961 4962 @Override 4963 public void update(int x, int y, int w, int h, boolean force) { 4964 super.update(x, y, w, h, force); 4965 4966 boolean above = isAboveAnchor(); 4967 if (above != mAbove) { 4968 fixDirection(above); 4969 } 4970 } 4971 } 4972 4973 static class InputContentType { 4974 int imeOptions = EditorInfo.IME_NULL; 4975 String privateImeOptions; 4976 CharSequence imeActionLabel; 4977 int imeActionId; 4978 Bundle extras; 4979 OnEditorActionListener onEditorActionListener; 4980 boolean enterDown; 4981 } 4982 4983 static class InputMethodState { 4984 ExtractedTextRequest mExtractedTextRequest; 4985 final ExtractedText mExtractedText = new ExtractedText(); 4986 int mBatchEditNesting; 4987 boolean mCursorChanged; 4988 boolean mSelectionModeChanged; 4989 boolean mContentChanged; 4990 int mChangedStart, mChangedEnd, mChangedDelta; 4991 } 4992 4993 /** 4994 * @return True iff (start, end) is a valid range within the text. 4995 */ 4996 private static boolean isValidRange(CharSequence text, int start, int end) { 4997 return 0 <= start && start <= end && end <= text.length(); 4998 } 4999 5000 /** 5001 * An InputFilter that monitors text input to maintain undo history. It does not modify the 5002 * text being typed (and hence always returns null from the filter() method). 5003 */ 5004 public static class UndoInputFilter implements InputFilter { 5005 private final Editor mEditor; 5006 5007 // Whether the current filter pass is directly caused by an end-user text edit. 5008 private boolean mIsUserEdit; 5009 5010 // Whether the text field is handling an IME composition. Must be parceled in case the user 5011 // rotates the screen during composition. 5012 private boolean mHasComposition; 5013 5014 public UndoInputFilter(Editor editor) { 5015 mEditor = editor; 5016 } 5017 5018 public void saveInstanceState(Parcel parcel) { 5019 parcel.writeInt(mIsUserEdit ? 1 : 0); 5020 parcel.writeInt(mHasComposition ? 1 : 0); 5021 } 5022 5023 public void restoreInstanceState(Parcel parcel) { 5024 mIsUserEdit = parcel.readInt() != 0; 5025 mHasComposition = parcel.readInt() != 0; 5026 } 5027 5028 /** 5029 * Signals that a user-triggered edit is starting. 5030 */ 5031 public void beginBatchEdit() { 5032 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 5033 mIsUserEdit = true; 5034 } 5035 5036 public void endBatchEdit() { 5037 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 5038 mIsUserEdit = false; 5039 } 5040 5041 @Override 5042 public CharSequence filter(CharSequence source, int start, int end, 5043 Spanned dest, int dstart, int dend) { 5044 if (DEBUG_UNDO) { 5045 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " + 5046 "dest=" + dest + " (" + dstart + "-" + dend + ")"); 5047 } 5048 5049 // Check to see if this edit should be tracked for undo. 5050 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 5051 return null; 5052 } 5053 5054 // Check for and handle IME composition edits. 5055 if (handleCompositionEdit(source, start, end, dstart)) { 5056 return null; 5057 } 5058 5059 // Handle keyboard edits. 5060 handleKeyboardEdit(source, start, end, dest, dstart, dend); 5061 return null; 5062 } 5063 5064 /** 5065 * Returns true iff the edit was handled, either because it should be ignored or because 5066 * this function created an undo operation for it. 5067 */ 5068 private boolean handleCompositionEdit(CharSequence source, int start, int end, int dstart) { 5069 // Ignore edits while the user is composing. 5070 if (isComposition(source)) { 5071 mHasComposition = true; 5072 return true; 5073 } 5074 final boolean hadComposition = mHasComposition; 5075 mHasComposition = false; 5076 5077 // Check for the transition out of the composing state. 5078 if (hadComposition) { 5079 // If there was no text the user canceled composition. Ignore the edit. 5080 if (start == end) { 5081 return true; 5082 } 5083 5084 // Otherwise the user inserted the composition. 5085 String newText = TextUtils.substring(source, start, end); 5086 EditOperation edit = new EditOperation(mEditor, "", dstart, newText); 5087 recordEdit(edit, false /* forceMerge */); 5088 return true; 5089 } 5090 5091 // This was neither a composition event nor a transition out of composing. 5092 return false; 5093 } 5094 5095 private void handleKeyboardEdit(CharSequence source, int start, int end, 5096 Spanned dest, int dstart, int dend) { 5097 // An application may install a TextWatcher to provide additional modifications after 5098 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 5099 // string). This results in multiple filter() calls for what the user considers to be 5100 // a single operation. Always undo the whole set of changes in one step. 5101 final boolean forceMerge = isInTextWatcher(); 5102 5103 // Build a new operation with all the information from this edit. 5104 String newText = TextUtils.substring(source, start, end); 5105 String oldText = TextUtils.substring(dest, dstart, dend); 5106 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText); 5107 recordEdit(edit, forceMerge); 5108 } 5109 5110 /** 5111 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 5112 * If forceMerge is true then the new edit is always merged. 5113 */ 5114 private void recordEdit(EditOperation edit, boolean forceMerge) { 5115 // Fetch the last edit operation and attempt to merge in the new edit. 5116 final UndoManager um = mEditor.mUndoManager; 5117 um.beginUpdate("Edit text"); 5118 EditOperation lastEdit = um.getLastOperation( 5119 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 5120 if (lastEdit == null) { 5121 // Add this as the first edit. 5122 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 5123 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5124 } else if (forceMerge) { 5125 // Forced merges take priority because they could be the result of a non-user-edit 5126 // change and this case should not create a new undo operation. 5127 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 5128 lastEdit.forceMergeWith(edit); 5129 } else if (!mIsUserEdit) { 5130 // An application directly modified the Editable outside of a text edit. Treat this 5131 // as a new change and don't attempt to merge. 5132 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 5133 um.commitState(mEditor.mUndoOwner); 5134 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5135 } else if (lastEdit.mergeWith(edit)) { 5136 // Merge succeeded, nothing else to do. 5137 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 5138 } else { 5139 // Could not merge with the last edit, so commit the last edit and add this edit. 5140 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 5141 um.commitState(mEditor.mUndoOwner); 5142 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 5143 } 5144 um.endUpdate(); 5145 } 5146 5147 private boolean canUndoEdit(CharSequence source, int start, int end, 5148 Spanned dest, int dstart, int dend) { 5149 if (!mEditor.mAllowUndo) { 5150 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 5151 return false; 5152 } 5153 5154 if (mEditor.mUndoManager.isInUndo()) { 5155 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 5156 return false; 5157 } 5158 5159 // Text filters run before input operations are applied. However, some input operations 5160 // are invalid and will throw exceptions when applied. This is common in tests. Don't 5161 // attempt to undo invalid operations. 5162 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 5163 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 5164 return false; 5165 } 5166 5167 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 5168 // on an input field. Skip no-op changes. 5169 if (start == end && dstart == dend) { 5170 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 5171 return false; 5172 } 5173 5174 return true; 5175 } 5176 5177 private boolean isComposition(CharSequence source) { 5178 if (!(source instanceof Spannable)) { 5179 return false; 5180 } 5181 // This is a composition edit if the source has a non-zero-length composing span. 5182 Spannable text = (Spannable) source; 5183 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 5184 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 5185 return composeBegin < composeEnd; 5186 } 5187 5188 private boolean isInTextWatcher() { 5189 CharSequence text = mEditor.mTextView.getText(); 5190 return (text instanceof SpannableStringBuilder) 5191 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 5192 } 5193 } 5194 5195 /** 5196 * An operation to undo a single "edit" to a text view. 5197 */ 5198 public static class EditOperation extends UndoOperation<Editor> { 5199 private static final int TYPE_INSERT = 0; 5200 private static final int TYPE_DELETE = 1; 5201 private static final int TYPE_REPLACE = 2; 5202 5203 private int mType; 5204 private String mOldText; 5205 private int mOldTextStart; 5206 private String mNewText; 5207 private int mNewTextStart; 5208 5209 private int mOldCursorPos; 5210 private int mNewCursorPos; 5211 5212 /** 5213 * Constructs an edit operation from a text input operation on editor that replaces the 5214 * oldText starting at dstart with newText. 5215 */ 5216 public EditOperation(Editor editor, String oldText, int dstart, String newText) { 5217 super(editor.mUndoOwner); 5218 mOldText = oldText; 5219 mNewText = newText; 5220 5221 // Determine the type of the edit and store where it occurred. Avoid storing 5222 // irrevelant data (e.g. mNewTextStart for a delete) because that makes the 5223 // merging logic more complex (e.g. merging deletes could lead to mNewTextStart being 5224 // outside the bounds of the final text). 5225 if (mNewText.length() > 0 && mOldText.length() == 0) { 5226 mType = TYPE_INSERT; 5227 mNewTextStart = dstart; 5228 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 5229 mType = TYPE_DELETE; 5230 mOldTextStart = dstart; 5231 } else { 5232 mType = TYPE_REPLACE; 5233 mOldTextStart = mNewTextStart = dstart; 5234 } 5235 5236 // Store cursor data. 5237 mOldCursorPos = editor.mTextView.getSelectionStart(); 5238 mNewCursorPos = dstart + mNewText.length(); 5239 } 5240 5241 public EditOperation(Parcel src, ClassLoader loader) { 5242 super(src, loader); 5243 mType = src.readInt(); 5244 mOldText = src.readString(); 5245 mOldTextStart = src.readInt(); 5246 mNewText = src.readString(); 5247 mNewTextStart = src.readInt(); 5248 mOldCursorPos = src.readInt(); 5249 mNewCursorPos = src.readInt(); 5250 } 5251 5252 @Override 5253 public void writeToParcel(Parcel dest, int flags) { 5254 dest.writeInt(mType); 5255 dest.writeString(mOldText); 5256 dest.writeInt(mOldTextStart); 5257 dest.writeString(mNewText); 5258 dest.writeInt(mNewTextStart); 5259 dest.writeInt(mOldCursorPos); 5260 dest.writeInt(mNewCursorPos); 5261 } 5262 5263 private int getNewTextEnd() { 5264 return mNewTextStart + mNewText.length(); 5265 } 5266 5267 private int getOldTextEnd() { 5268 return mOldTextStart + mOldText.length(); 5269 } 5270 5271 @Override 5272 public void commit() { 5273 } 5274 5275 @Override 5276 public void undo() { 5277 if (DEBUG_UNDO) Log.d(TAG, "undo"); 5278 // Remove the new text and insert the old. 5279 Editor editor = getOwnerData(); 5280 Editable text = (Editable) editor.mTextView.getText(); 5281 modifyText(text, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5282 mOldCursorPos); 5283 } 5284 5285 @Override 5286 public void redo() { 5287 if (DEBUG_UNDO) Log.d(TAG, "redo"); 5288 // Remove the old text and insert the new. 5289 Editor editor = getOwnerData(); 5290 Editable text = (Editable) editor.mTextView.getText(); 5291 modifyText(text, mOldTextStart, getOldTextEnd(), mNewText, mNewTextStart, 5292 mNewCursorPos); 5293 } 5294 5295 /** 5296 * Attempts to merge this existing operation with a new edit. 5297 * @param edit The new edit operation. 5298 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 5299 * object unchanged. 5300 */ 5301 private boolean mergeWith(EditOperation edit) { 5302 if (DEBUG_UNDO) { 5303 Log.d(TAG, "mergeWith old " + this); 5304 Log.d(TAG, "mergeWith new " + edit); 5305 } 5306 switch (mType) { 5307 case TYPE_INSERT: 5308 return mergeInsertWith(edit); 5309 case TYPE_DELETE: 5310 return mergeDeleteWith(edit); 5311 case TYPE_REPLACE: 5312 return mergeReplaceWith(edit); 5313 default: 5314 return false; 5315 } 5316 } 5317 5318 private boolean mergeInsertWith(EditOperation edit) { 5319 // Only merge continuous insertions. 5320 if (edit.mType != TYPE_INSERT) { 5321 return false; 5322 } 5323 // Only merge insertions that are contiguous. 5324 if (getNewTextEnd() != edit.mNewTextStart) { 5325 return false; 5326 } 5327 mNewText += edit.mNewText; 5328 mNewCursorPos = edit.mNewCursorPos; 5329 return true; 5330 } 5331 5332 // TODO: Support forward delete. 5333 private boolean mergeDeleteWith(EditOperation edit) { 5334 // Only merge continuous deletes. 5335 if (edit.mType != TYPE_DELETE) { 5336 return false; 5337 } 5338 // Only merge deletions that are contiguous. 5339 if (mOldTextStart != edit.getOldTextEnd()) { 5340 return false; 5341 } 5342 mOldTextStart = edit.mOldTextStart; 5343 mOldText = edit.mOldText + mOldText; 5344 mNewCursorPos = edit.mNewCursorPos; 5345 return true; 5346 } 5347 5348 private boolean mergeReplaceWith(EditOperation edit) { 5349 // Replacements can merge only with adjacent inserts. 5350 if (edit.mType != TYPE_INSERT || getNewTextEnd() != edit.mNewTextStart) { 5351 return false; 5352 } 5353 mOldText += edit.mOldText; 5354 mNewText += edit.mNewText; 5355 mNewCursorPos = edit.mNewCursorPos; 5356 return true; 5357 } 5358 5359 /** 5360 * Forcibly creates a single merged edit operation by simulating the entire text 5361 * contents being replaced. 5362 */ 5363 public void forceMergeWith(EditOperation edit) { 5364 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 5365 Editor editor = getOwnerData(); 5366 5367 // Copy the text of the current field. 5368 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 5369 // but would require two parallel implementations of modifyText() because Editable and 5370 // StringBuilder do not share an interface for replace/delete/insert. 5371 Editable editable = (Editable) editor.mTextView.getText(); 5372 Editable originalText = new SpannableStringBuilder(editable.toString()); 5373 5374 // Roll back the last operation. 5375 modifyText(originalText, mNewTextStart, getNewTextEnd(), mOldText, mOldTextStart, 5376 mOldCursorPos); 5377 5378 // Clone the text again and apply the new operation. 5379 Editable finalText = new SpannableStringBuilder(editable.toString()); 5380 modifyText(finalText, edit.mOldTextStart, edit.getOldTextEnd(), edit.mNewText, 5381 edit.mNewTextStart, edit.mNewCursorPos); 5382 5383 // Convert this operation into a non-mergeable replacement of the entire string. 5384 mType = TYPE_REPLACE; 5385 mNewText = finalText.toString(); 5386 mNewTextStart = 0; 5387 mOldText = originalText.toString(); 5388 mOldTextStart = 0; 5389 mNewCursorPos = edit.mNewCursorPos; 5390 // mOldCursorPos is unchanged. 5391 } 5392 5393 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 5394 CharSequence newText, int newTextInsertAt, int newCursorPos) { 5395 // Apply the edit if it is still valid. 5396 if (isValidRange(text, deleteFrom, deleteTo) && 5397 newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 5398 if (deleteFrom != deleteTo) { 5399 text.delete(deleteFrom, deleteTo); 5400 } 5401 if (newText.length() != 0) { 5402 text.insert(newTextInsertAt, newText); 5403 } 5404 } 5405 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 5406 // don't explicitly set it and rely on SpannableStringBuilder to position it. 5407 // TODO: Select all the text that was undone. 5408 if (0 <= newCursorPos && newCursorPos <= text.length()) { 5409 Selection.setSelection(text, newCursorPos); 5410 } 5411 } 5412 5413 private String getTypeString() { 5414 switch (mType) { 5415 case TYPE_INSERT: 5416 return "insert"; 5417 case TYPE_DELETE: 5418 return "delete"; 5419 case TYPE_REPLACE: 5420 return "replace"; 5421 default: 5422 return ""; 5423 } 5424 } 5425 5426 @Override 5427 public String toString() { 5428 return "[mType=" + getTypeString() + ", " + 5429 "mOldText=" + mOldText + ", " + 5430 "mOldTextStart=" + mOldTextStart + ", " + 5431 "mNewText=" + mNewText + ", " + 5432 "mNewTextStart=" + mNewTextStart + ", " + 5433 "mOldCursorPos=" + mOldCursorPos + ", " + 5434 "mNewCursorPos=" + mNewCursorPos + "]"; 5435 } 5436 5437 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR 5438 = new Parcelable.ClassLoaderCreator<EditOperation>() { 5439 @Override 5440 public EditOperation createFromParcel(Parcel in) { 5441 return new EditOperation(in, null); 5442 } 5443 5444 @Override 5445 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 5446 return new EditOperation(in, loader); 5447 } 5448 5449 @Override 5450 public EditOperation[] newArray(int size) { 5451 return new EditOperation[size]; 5452 } 5453 }; 5454 } 5455} 5456