SearchActivity.java revision dfe0df4a730c54bdc963b891f9a3080c38055ebb
1/* 2 * Copyright (C) 2009 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 com.android.quicksearchbox; 18 19import com.android.common.Search; 20import com.android.quicksearchbox.ui.CorpusViewFactory; 21import com.android.quicksearchbox.ui.SuggestionClickListener; 22import com.android.quicksearchbox.ui.SuggestionSelectionListener; 23import com.android.quicksearchbox.ui.SuggestionsAdapter; 24import com.android.quicksearchbox.ui.SuggestionsFooter; 25import com.android.quicksearchbox.ui.SuggestionsView; 26 27import android.app.Activity; 28import android.app.SearchManager; 29import android.content.DialogInterface; 30import android.content.Intent; 31import android.graphics.drawable.Drawable; 32import android.net.Uri; 33import android.os.Bundle; 34import android.os.Handler; 35import android.text.Editable; 36import android.text.TextUtils; 37import android.text.TextWatcher; 38import android.util.Log; 39import android.view.KeyEvent; 40import android.view.Menu; 41import android.view.View; 42import android.view.ViewGroup; 43import android.view.View.OnFocusChangeListener; 44import android.view.inputmethod.InputMethodManager; 45import android.widget.EditText; 46import android.widget.ImageButton; 47 48import java.util.Collection; 49import java.util.Collections; 50import java.util.List; 51 52/** 53 * The main activity for Quick Search Box. Shows the search UI. 54 * 55 */ 56public class SearchActivity extends Activity { 57 58 private static final boolean DBG = true; 59 private static final String TAG = "QSB.SearchActivity"; 60 61 private static final String SCHEME_CORPUS = "qsb.corpus"; 62 63 public static final String INTENT_ACTION_QSB_AND_SELECT_CORPUS 64 = "com.android.quicksearchbox.action.QSB_AND_SELECT_CORPUS"; 65 66 // The string used for privateImeOptions to identify to the IME that it should not show 67 // a microphone button since one already exists in the search dialog. 68 // TODO: This should move to android-common or something. 69 private static final String IME_OPTION_NO_MICROPHONE = "nm"; 70 71 // Keys for the saved instance state. 72 private static final String INSTANCE_KEY_CORPUS = "corpus"; 73 private static final String INSTANCE_KEY_USER_QUERY = "query"; 74 75 // Measures time from for last onCreate()/onNewIntent() call. 76 private LatencyTracker mStartLatencyTracker; 77 // Whether QSB is starting. True between the calls to onCreate()/onNewIntent() and onResume(). 78 private boolean mStarting; 79 // True if the user has taken some action, e.g. launching a search, voice search, 80 // or suggestions, since QSB was last started. 81 private boolean mTookAction; 82 83 private CorpusSelectionDialog mCorpusSelectionDialog; 84 85 protected SuggestionsAdapter mSuggestionsAdapter; 86 87 protected EditText mQueryTextView; 88 // True if the query was empty on the previous call to updateQuery() 89 protected boolean mQueryWasEmpty = true; 90 91 protected SuggestionsView mSuggestionsView; 92 protected SuggestionsFooter mSuggestionsFooter; 93 94 protected ImageButton mSearchGoButton; 95 protected ImageButton mVoiceSearchButton; 96 protected ImageButton mCorpusIndicator; 97 98 private Launcher mLauncher; 99 100 private Corpus mCorpus; 101 private Bundle mAppSearchData; 102 private boolean mUpdateSuggestions; 103 private String mUserQuery; 104 private boolean mSelectAll; 105 106 private Handler mUpdateSuggestionsHandler = new Handler(); 107 private Runnable mUpdateSuggestionsTask = new Runnable() { 108 public void run() { 109 updateSuggestions(getQuery()); 110 } 111 }; 112 113 /** Called when the activity is first created. */ 114 @Override 115 public void onCreate(Bundle savedInstanceState) { 116 recordStartTime(); 117 if (DBG) Log.d(TAG, "onCreate()"); 118 super.onCreate(savedInstanceState); 119 120 setContentView(R.layout.search_activity); 121 122 mSuggestionsAdapter = getQsbApplication().createSuggestionsAdapter(); 123 124 mQueryTextView = (EditText) findViewById(R.id.search_src_text); 125 mSuggestionsView = (SuggestionsView) findViewById(R.id.suggestions); 126 mSuggestionsView.setSuggestionClickListener(new ClickHandler()); 127 mSuggestionsView.setSuggestionSelectionListener(new SelectionHandler()); 128 mSuggestionsView.setInteractionListener(new InputMethodCloser()); 129 mSuggestionsView.setOnKeyListener(new SuggestionsViewKeyListener()); 130 mSuggestionsView.setOnFocusChangeListener(new SuggestListFocusListener()); 131 132 mSuggestionsFooter = getQsbApplication().createSuggestionsFooter(); 133 ViewGroup footerFrame = (ViewGroup) findViewById(R.id.footer); 134 mSuggestionsFooter.addToContainer(footerFrame); 135 136 mSearchGoButton = (ImageButton) findViewById(R.id.search_go_btn); 137 mVoiceSearchButton = (ImageButton) findViewById(R.id.search_voice_btn); 138 mCorpusIndicator = (ImageButton) findViewById(R.id.corpus_indicator); 139 140 mLauncher = new Launcher(this); 141 142 mQueryTextView.addTextChangedListener(new SearchTextWatcher()); 143 mQueryTextView.setOnKeyListener(new QueryTextViewKeyListener()); 144 mQueryTextView.setOnFocusChangeListener(new QueryTextViewFocusListener()); 145 146 mCorpusIndicator.setOnClickListener(new CorpusIndicatorClickListener()); 147 148 mSearchGoButton.setOnClickListener(new SearchGoButtonClickListener()); 149 150 mVoiceSearchButton.setOnClickListener(new VoiceSearchButtonClickListener()); 151 152 ButtonsKeyListener buttonsKeyListener = new ButtonsKeyListener(); 153 mSearchGoButton.setOnKeyListener(buttonsKeyListener); 154 mVoiceSearchButton.setOnKeyListener(buttonsKeyListener); 155 mCorpusIndicator.setOnKeyListener(buttonsKeyListener); 156 157 mUpdateSuggestions = true; 158 159 // First get setup from intent 160 Intent intent = getIntent(); 161 setupFromIntent(intent); 162 // Then restore any saved instance state 163 restoreInstanceState(savedInstanceState); 164 165 // Do this at the end, to avoid updating the list view when setSource() 166 // is called. 167 mSuggestionsView.setAdapter(mSuggestionsAdapter); 168 mSuggestionsFooter.setAdapter(mSuggestionsAdapter); 169 } 170 171 @Override 172 protected void onNewIntent(Intent intent) { 173 recordStartTime(); 174 setIntent(intent); 175 setupFromIntent(intent); 176 } 177 178 private void recordStartTime() { 179 mStartLatencyTracker = new LatencyTracker(); 180 mStarting = true; 181 mTookAction = false; 182 } 183 184 protected void restoreInstanceState(Bundle savedInstanceState) { 185 if (savedInstanceState == null) return; 186 String corpusName = savedInstanceState.getString(INSTANCE_KEY_CORPUS); 187 String query = savedInstanceState.getString(INSTANCE_KEY_USER_QUERY); 188 setCorpus(getCorpus(corpusName)); 189 setUserQuery(query); 190 } 191 192 @Override 193 protected void onSaveInstanceState(Bundle outState) { 194 super.onSaveInstanceState(outState); 195 // We don't save appSearchData, since we always get the value 196 // from the intent and the user can't change it. 197 198 String corpusName = mCorpus == null ? null : mCorpus.getName(); 199 outState.putString(INSTANCE_KEY_CORPUS, corpusName); 200 outState.putString(INSTANCE_KEY_USER_QUERY, mUserQuery); 201 } 202 203 private void setupFromIntent(Intent intent) { 204 if (DBG) Log.d(TAG, "setupFromIntent(" + intent.toUri(0) + ")"); 205 Corpus corpus = getCorpusFromUri(intent.getData()); 206 String query = intent.getStringExtra(SearchManager.QUERY); 207 Bundle appSearchData = intent.getBundleExtra(SearchManager.APP_DATA); 208 209 setCorpus(corpus); 210 setUserQuery(query); 211 mSelectAll = intent.getBooleanExtra(SearchManager.EXTRA_SELECT_QUERY, false); 212 mAppSearchData = appSearchData; 213 214 if (startedIntoCorpusSelectionDialog()) { 215 showCorpusSelectionDialog(); 216 } 217 } 218 219 public boolean startedIntoCorpusSelectionDialog() { 220 return INTENT_ACTION_QSB_AND_SELECT_CORPUS.equals(getIntent().getAction()); 221 } 222 223 /** 224 * Removes corpus selector intent action, so that BACK works normally after 225 * dismissing and reopening the corpus selector. 226 */ 227 private void clearStartedIntoCorpusSelectionDialog() { 228 Intent oldIntent = getIntent(); 229 if (SearchActivity.INTENT_ACTION_QSB_AND_SELECT_CORPUS.equals(oldIntent.getAction())) { 230 Intent newIntent = new Intent(oldIntent); 231 newIntent.setAction(SearchManager.INTENT_ACTION_GLOBAL_SEARCH); 232 setIntent(newIntent); 233 } 234 } 235 236 public static Uri getCorpusUri(Corpus corpus) { 237 if (corpus == null) return null; 238 return new Uri.Builder() 239 .scheme(SCHEME_CORPUS) 240 .authority(corpus.getName()) 241 .build(); 242 } 243 244 private Corpus getCorpusFromUri(Uri uri) { 245 if (uri == null) return null; 246 if (!SCHEME_CORPUS.equals(uri.getScheme())) return null; 247 String name = uri.getAuthority(); 248 return getCorpus(name); 249 } 250 251 private Corpus getCorpus(String sourceName) { 252 if (sourceName == null) return null; 253 Corpus corpus = getCorpora().getCorpus(sourceName); 254 if (corpus == null) { 255 Log.w(TAG, "Unknown corpus " + sourceName); 256 return null; 257 } 258 return corpus; 259 } 260 261 private void setCorpus(Corpus corpus) { 262 if (DBG) Log.d(TAG, "setCorpus(" + corpus + ")"); 263 mCorpus = corpus; 264 Drawable sourceIcon; 265 if (corpus == null) { 266 sourceIcon = getCorpusViewFactory().getGlobalSearchIcon(); 267 } else { 268 sourceIcon = corpus.getCorpusIcon(); 269 } 270 mSuggestionsAdapter.setCorpus(corpus); 271 mCorpusIndicator.setImageDrawable(sourceIcon); 272 273 updateUi(getQuery().length() == 0); 274 } 275 276 private QsbApplication getQsbApplication() { 277 return (QsbApplication) getApplication(); 278 } 279 280 private Config getConfig() { 281 return getQsbApplication().getConfig(); 282 } 283 284 private Corpora getCorpora() { 285 return getQsbApplication().getCorpora(); 286 } 287 288 private ShortcutRepository getShortcutRepository() { 289 return getQsbApplication().getShortcutRepository(); 290 } 291 292 private SuggestionsProvider getSuggestionsProvider() { 293 return getQsbApplication().getSuggestionsProvider(); 294 } 295 296 private CorpusRanker getCorpusRanker() { 297 return getQsbApplication().getCorpusRanker(); 298 } 299 300 private CorpusViewFactory getCorpusViewFactory() { 301 return getQsbApplication().getCorpusViewFactory(); 302 } 303 304 private Logger getLogger() { 305 return getQsbApplication().getLogger(); 306 } 307 308 @Override 309 protected void onDestroy() { 310 if (DBG) Log.d(TAG, "onDestroy()"); 311 super.onDestroy(); 312 mSuggestionsFooter.setAdapter(null); 313 mSuggestionsView.setAdapter(null); // closes mSuggestionsAdapter 314 } 315 316 @Override 317 protected void onStop() { 318 if (DBG) Log.d(TAG, "onStop()"); 319 if (!mTookAction) { 320 // TODO: This gets logged when starting other activities, e.g. by opening he search 321 // settings, or clicking a notification in the status bar. 322 getLogger().logExit(getCurrentSuggestions(), getQuery().length()); 323 } 324 // Close all open suggestion cursors. The query will be redone in onResume() 325 // if we come back to this activity. 326 mSuggestionsAdapter.setSuggestions(null); 327 getQsbApplication().getShortcutRefresher().reset(); 328 dismissCorpusSelectionDialog(); 329 super.onStop(); 330 } 331 332 @Override 333 protected void onResume() { 334 if (DBG) Log.d(TAG, "onResume()"); 335 super.onResume(); 336 setQuery(mUserQuery, mSelectAll); 337 // Only select everything the first time after creating the activity. 338 mSelectAll = false; 339 updateSuggestions(mUserQuery); 340 if (!isCorpusSelectionDialogShowing()) { 341 mQueryTextView.requestFocus(); 342 showInputMethodForQuery(); 343 } 344 if (mStarting) { 345 mStarting = false; 346 String source = getIntent().getStringExtra(Search.SOURCE); 347 List<Corpus> rankedCorpora = getCorpusRanker().getRankedCorpora(); 348 int latency = mStartLatencyTracker.getLatency(); 349 getLogger().logStart(latency, source, mCorpus, rankedCorpora); 350 } 351 } 352 353 @Override 354 public boolean onCreateOptionsMenu(Menu menu) { 355 super.onCreateOptionsMenu(menu); 356 SearchSettings.addSearchSettingsMenuItem(this, menu); 357 return true; 358 } 359 360 /** 361 * Sets the query as typed by the user. Does not update the suggestions 362 * or the text in the query box. 363 */ 364 protected void setUserQuery(String userQuery) { 365 if (userQuery == null) userQuery = ""; 366 mUserQuery = userQuery; 367 } 368 369 protected String getQuery() { 370 CharSequence q = mQueryTextView.getText(); 371 return q == null ? "" : q.toString(); 372 } 373 374 /** 375 * Restores the query entered by the user. 376 */ 377 private void restoreUserQuery() { 378 if (DBG) Log.d(TAG, "Restoring query to '" + mUserQuery + "'"); 379 setQuery(mUserQuery, false); 380 } 381 382 /** 383 * Sets the text in the query box. Does not update the suggestions, 384 * and does not change the saved user-entered query. 385 * {@link #restoreUserQuery()} will restore the query to the last 386 * user-entered query. 387 */ 388 private void setQuery(String query, boolean selectAll) { 389 mUpdateSuggestions = false; 390 mQueryTextView.setText(query); 391 setTextSelection(selectAll); 392 mUpdateSuggestions = true; 393 } 394 395 /** 396 * Sets the text selection in the query text view. 397 * 398 * @param selectAll If {@code true}, selects the entire query. 399 * If {@false}, no characters are selected, and the cursor is placed 400 * at the end of the query. 401 */ 402 private void setTextSelection(boolean selectAll) { 403 if (selectAll) { 404 mQueryTextView.selectAll(); 405 } else { 406 mQueryTextView.setSelection(mQueryTextView.length()); 407 } 408 } 409 410 private void updateUi(boolean queryEmpty) { 411 updateQueryTextView(queryEmpty); 412 updateSearchGoButton(queryEmpty); 413 updateVoiceSearchButton(queryEmpty); 414 } 415 416 private void updateQueryTextView(boolean queryEmpty) { 417 if (queryEmpty) { 418 if (mCorpus == null || mCorpus.isWebCorpus()) { 419 mQueryTextView.setBackgroundResource(R.drawable.textfield_search_empty_google); 420 mQueryTextView.setHint(null); 421 } else { 422 mQueryTextView.setBackgroundResource(R.drawable.textfield_search_empty); 423 mQueryTextView.setHint(mCorpus.getHint()); 424 } 425 } else { 426 mQueryTextView.setBackgroundResource(R.drawable.textfield_search); 427 } 428 } 429 430 private void updateSearchGoButton(boolean queryEmpty) { 431 if (queryEmpty) { 432 mSearchGoButton.setVisibility(View.GONE); 433 } else { 434 mSearchGoButton.setVisibility(View.VISIBLE); 435 } 436 } 437 438 protected void updateVoiceSearchButton(boolean queryEmpty) { 439 if (queryEmpty && mLauncher.shouldShowVoiceSearch(mCorpus)) { 440 mVoiceSearchButton.setVisibility(View.VISIBLE); 441 mQueryTextView.setPrivateImeOptions(IME_OPTION_NO_MICROPHONE); 442 } else { 443 mVoiceSearchButton.setVisibility(View.GONE); 444 mQueryTextView.setPrivateImeOptions(null); 445 } 446 } 447 448 protected void showCorpusSelectionDialog() { 449 if (mCorpusSelectionDialog == null) { 450 mCorpusSelectionDialog = new CorpusSelectionDialog(this); 451 mCorpusSelectionDialog.setOwnerActivity(this); 452 mCorpusSelectionDialog.setOnDismissListener(new CorpusSelectorDismissListener()); 453 mCorpusSelectionDialog.setOnCorpusSelectedListener(new CorpusSelectionListener()); 454 } 455 mCorpusSelectionDialog.show(mCorpus); 456 } 457 458 protected boolean isCorpusSelectionDialogShowing() { 459 return mCorpusSelectionDialog != null && mCorpusSelectionDialog.isShowing(); 460 } 461 462 protected void dismissCorpusSelectionDialog() { 463 if (mCorpusSelectionDialog != null) { 464 mCorpusSelectionDialog.dismiss(); 465 } 466 } 467 468 protected void onSearchClicked(int method) { 469 String query = getQuery(); 470 if (DBG) Log.d(TAG, "Search clicked, query=" + query); 471 472 // Don't do empty queries 473 if (TextUtils.getTrimmedLength(query) == 0) return; 474 475 Corpus searchCorpus = mLauncher.getSearchCorpus(getCorpora(), mCorpus); 476 if (searchCorpus == null) return; 477 478 mTookAction = true; 479 480 // Log search start 481 getLogger().logSearch(mCorpus, method, query.length()); 482 483 // Create shortcut 484 SuggestionData searchShortcut = searchCorpus.createSearchShortcut(query); 485 if (searchShortcut != null) { 486 DataSuggestionCursor cursor = new DataSuggestionCursor(query); 487 cursor.add(searchShortcut); 488 getShortcutRepository().reportClick(cursor, 0); 489 } 490 491 // Start search 492 Intent intent = searchCorpus.createSearchIntent(query, mAppSearchData); 493 mLauncher.launchIntent(intent); 494 } 495 496 protected void onVoiceSearchClicked() { 497 if (DBG) Log.d(TAG, "Voice Search clicked"); 498 Corpus searchCorpus = mLauncher.getSearchCorpus(getCorpora(), mCorpus); 499 if (searchCorpus == null) return; 500 501 mTookAction = true; 502 503 // Log voice search start 504 getLogger().logVoiceSearch(searchCorpus); 505 506 // Start voice search 507 Intent intent = searchCorpus.createVoiceSearchIntent(mAppSearchData); 508 mLauncher.launchIntent(intent); 509 } 510 511 protected SuggestionCursor getCurrentSuggestions() { 512 return mSuggestionsAdapter.getCurrentSuggestions(); 513 } 514 515 protected boolean launchSuggestion(int position) { 516 if (DBG) Log.d(TAG, "Launching suggestion " + position); 517 mTookAction = true; 518 519 SuggestionCursor suggestions = getCurrentSuggestions(); 520 521 // Log suggestion click 522 Collection<Corpus> corpora = mSuggestionsAdapter.getSuggestions().getIncludedCorpora(); 523 getLogger().logSuggestionClick(position, suggestions, corpora); 524 525 // Create shortcut 526 getShortcutRepository().reportClick(suggestions, position); 527 528 // Launch intent 529 Intent intent = mLauncher.getSuggestionIntent(suggestions, position, mAppSearchData); 530 mLauncher.launchIntent(intent); 531 532 return true; 533 } 534 535 protected boolean onSuggestionLongClicked(int position) { 536 if (DBG) Log.d(TAG, "Long clicked on suggestion " + position); 537 return false; 538 } 539 540 protected boolean onSuggestionKeyDown(int position, int keyCode, KeyEvent event) { 541 // Treat enter or search as a click 542 if (keyCode == KeyEvent.KEYCODE_ENTER || keyCode == KeyEvent.KEYCODE_SEARCH) { 543 return launchSuggestion(position); 544 } 545 546 if (keyCode == KeyEvent.KEYCODE_DPAD_UP 547 && mSuggestionsView.getSelectedItemPosition() == 0) { 548 // Moved up from the top suggestion, restore the user query and focus query box 549 if (DBG) Log.d(TAG, "Up and out"); 550 restoreUserQuery(); 551 return false; // let the framework handle the move 552 } 553 554 if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT 555 || keyCode == KeyEvent.KEYCODE_DPAD_RIGHT) { 556 // Moved left / right from a suggestion, keep current query, move 557 // focus to query box, and move cursor to far left / right 558 if (DBG) Log.d(TAG, "Left/right on a suggestion"); 559 String query = getQuery(); 560 int cursorPos = (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) ? 0 : query.length(); 561 mQueryTextView.setSelection(cursorPos); 562 mQueryTextView.requestFocus(); 563 updateSuggestions(query); 564 return true; 565 } 566 567 return false; 568 } 569 570 protected void onSourceSelected() { 571 if (DBG) Log.d(TAG, "No suggestion selected"); 572 restoreUserQuery(); 573 } 574 575 protected int getSelectedPosition() { 576 return mSuggestionsView.getSelectedPosition(); 577 } 578 579 /** 580 * Hides the input method. 581 */ 582 protected void hideInputMethod() { 583 InputMethodManager imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE); 584 if (imm != null) { 585 imm.hideSoftInputFromWindow(mQueryTextView.getWindowToken(), 0); 586 } 587 } 588 589 protected void showInputMethodForQuery() { 590 InputMethodManager imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE); 591 if (imm != null) { 592 imm.showSoftInput(mQueryTextView, InputMethodManager.SHOW_IMPLICIT); 593 } 594 } 595 596 /** 597 * Hides the input method when the suggestions get focus. 598 */ 599 private class SuggestListFocusListener implements OnFocusChangeListener { 600 public void onFocusChange(View v, boolean focused) { 601 if (DBG) Log.d(TAG, "Suggestions focus change, now: " + focused); 602 if (focused) { 603 // The suggestions list got focus, hide the input method 604 hideInputMethod(); 605 } 606 } 607 } 608 609 private class QueryTextViewFocusListener implements OnFocusChangeListener { 610 public void onFocusChange(View v, boolean focused) { 611 if (DBG) Log.d(TAG, "Query focus change, now: " + focused); 612 if (focused) { 613 // The query box got focus, show the input method 614 showInputMethodForQuery(); 615 } 616 } 617 } 618 619 private List<Corpus> getCorporaToQuery() { 620 if (mCorpus == null) { 621 return getCorpusRanker().getRankedCorpora(); 622 } else { 623 return Collections.singletonList(mCorpus); 624 } 625 } 626 627 private int getMaxSuggestions() { 628 Config config = getConfig(); 629 return mCorpus == null 630 ? config.getMaxPromotedSuggestions() 631 : config.getMaxResultsPerSource(); 632 } 633 634 private void updateSuggestionsBuffered() { 635 mUpdateSuggestionsHandler.removeCallbacks(mUpdateSuggestionsTask); 636 long delay = getConfig().getTypingUpdateSuggestionsDelayMillis(); 637 mUpdateSuggestionsHandler.postDelayed(mUpdateSuggestionsTask, delay); 638 } 639 640 private void updateSuggestions(String query) { 641 query = ltrim(query); 642 List<Corpus> corporaToQuery = getCorporaToQuery(); 643 Suggestions suggestions = getSuggestionsProvider().getSuggestions( 644 query, corporaToQuery, getMaxSuggestions()); 645 mSuggestionsAdapter.setSuggestions(suggestions); 646 } 647 648 private boolean forwardKeyToQueryTextView(int keyCode, KeyEvent event) { 649 if (!event.isSystem() && !isDpadKey(keyCode)) { 650 if (DBG) Log.d(TAG, "Forwarding key to query box: " + event); 651 if (mQueryTextView.requestFocus()) { 652 return mQueryTextView.dispatchKeyEvent(event); 653 } 654 } 655 return false; 656 } 657 658 private boolean isDpadKey(int keyCode) { 659 switch (keyCode) { 660 case KeyEvent.KEYCODE_DPAD_UP: 661 case KeyEvent.KEYCODE_DPAD_DOWN: 662 case KeyEvent.KEYCODE_DPAD_LEFT: 663 case KeyEvent.KEYCODE_DPAD_RIGHT: 664 case KeyEvent.KEYCODE_DPAD_CENTER: 665 return true; 666 default: 667 return false; 668 } 669 } 670 671 /** 672 * Filters the suggestions list when the search text changes. 673 */ 674 private class SearchTextWatcher implements TextWatcher { 675 public void afterTextChanged(Editable s) { 676 boolean empty = s.length() == 0; 677 if (empty != mQueryWasEmpty) { 678 mQueryWasEmpty = empty; 679 updateUi(empty); 680 } 681 if (mUpdateSuggestions) { 682 String query = s == null ? "" : s.toString(); 683 setUserQuery(query); 684 updateSuggestionsBuffered(); 685 } 686 } 687 688 public void beforeTextChanged(CharSequence s, int start, int count, int after) { 689 } 690 691 public void onTextChanged(CharSequence s, int start, int before, int count) { 692 } 693 } 694 695 /** 696 * Handles non-text keys in the query text view. 697 */ 698 private class QueryTextViewKeyListener implements View.OnKeyListener { 699 public boolean onKey(View view, int keyCode, KeyEvent event) { 700 // Handle IME search action key 701 if (keyCode == KeyEvent.KEYCODE_ENTER && event.getAction() == KeyEvent.ACTION_UP) { 702 onSearchClicked(Logger.SEARCH_METHOD_KEYBOARD); 703 } 704 return false; 705 } 706 } 707 708 /** 709 * Handles key events on the search and voice search buttons, 710 * by refocusing to EditText. 711 */ 712 private class ButtonsKeyListener implements View.OnKeyListener { 713 public boolean onKey(View v, int keyCode, KeyEvent event) { 714 return forwardKeyToQueryTextView(keyCode, event); 715 } 716 } 717 718 /** 719 * Handles key events on the suggestions list view. 720 */ 721 private class SuggestionsViewKeyListener implements View.OnKeyListener { 722 public boolean onKey(View v, int keyCode, KeyEvent event) { 723 if (event.getAction() == KeyEvent.ACTION_DOWN) { 724 int position = getSelectedPosition(); 725 if (onSuggestionKeyDown(position, keyCode, event)) { 726 return true; 727 } 728 } 729 return forwardKeyToQueryTextView(keyCode, event); 730 } 731 } 732 733 private class InputMethodCloser implements SuggestionsView.InteractionListener { 734 public void onInteraction() { 735 hideInputMethod(); 736 } 737 } 738 739 private class ClickHandler implements SuggestionClickListener { 740 public void onSuggestionClicked(int position) { 741 launchSuggestion(position); 742 } 743 744 public boolean onSuggestionLongClicked(int position) { 745 return SearchActivity.this.onSuggestionLongClicked(position); 746 } 747 } 748 749 private class SelectionHandler implements SuggestionSelectionListener { 750 public void onSuggestionSelected(int position) { 751 SuggestionCursor suggestions = getCurrentSuggestions(); 752 suggestions.moveTo(position); 753 String displayQuery = suggestions.getSuggestionDisplayQuery(); 754 if (TextUtils.isEmpty(displayQuery)) { 755 restoreUserQuery(); 756 } else { 757 setQuery(displayQuery, false); 758 } 759 } 760 761 public void onNothingSelected() { 762 // This happens when a suggestion has been selected with the 763 // dpad / trackball and then a different UI element is touched. 764 // Do nothing, since we want to keep the query of the selection 765 // in the search box. 766 } 767 } 768 769 /** 770 * Listens for clicks on the source selector. 771 */ 772 private class SearchGoButtonClickListener implements View.OnClickListener { 773 public void onClick(View view) { 774 onSearchClicked(Logger.SEARCH_METHOD_BUTTON); 775 } 776 } 777 778 /** 779 * Listens for clicks on the search button. 780 */ 781 private class CorpusIndicatorClickListener implements View.OnClickListener { 782 public void onClick(View view) { 783 showCorpusSelectionDialog(); 784 } 785 } 786 787 private class CorpusSelectorDismissListener implements DialogInterface.OnDismissListener { 788 public void onDismiss(DialogInterface dialog) { 789 if (DBG) Log.d(TAG, "Corpus selector dismissed"); 790 clearStartedIntoCorpusSelectionDialog(); 791 } 792 } 793 794 private class CorpusSelectionListener 795 implements CorpusSelectionDialog.OnCorpusSelectedListener { 796 public void onCorpusSelected(Corpus corpus) { 797 setCorpus(corpus); 798 updateSuggestions(getQuery()); 799 mQueryTextView.requestFocus(); 800 showInputMethodForQuery(); 801 } 802 } 803 804 /** 805 * Listens for clicks on the voice search button. 806 */ 807 private class VoiceSearchButtonClickListener implements View.OnClickListener { 808 public void onClick(View view) { 809 onVoiceSearchClicked(); 810 } 811 } 812 813 private static String ltrim(String text) { 814 int start = 0; 815 int length = text.length(); 816 while (start < length && Character.isWhitespace(text.charAt(start))) { 817 start++; 818 } 819 return start > 0 ? text.substring(start, length) : text; 820 } 821 822} 823