| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.launcher3.allapps; |
| |
| import android.os.Handler; |
| |
| import com.android.launcher3.AppInfo; |
| import com.android.launcher3.util.ComponentKey; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.regex.Pattern; |
| |
| /** |
| * The default search implementation. |
| */ |
| public class DefaultAppSearchAlgorithm { |
| |
| private static final Pattern SPLIT_PATTERN = Pattern.compile("[\\s|\\p{javaSpaceChar}]+"); |
| |
| private final List<AppInfo> mApps; |
| protected final Handler mResultHandler; |
| |
| public DefaultAppSearchAlgorithm(List<AppInfo> apps) { |
| mApps = apps; |
| mResultHandler = new Handler(); |
| } |
| |
| public void cancel(boolean interruptActiveRequests) { |
| if (interruptActiveRequests) { |
| mResultHandler.removeCallbacksAndMessages(null); |
| } |
| } |
| |
| public void doSearch(final String query, |
| final AllAppsSearchBarController.Callbacks callback) { |
| final ArrayList<ComponentKey> result = getTitleMatchResult(query); |
| mResultHandler.post(new Runnable() { |
| |
| @Override |
| public void run() { |
| callback.onSearchResult(query, result); |
| } |
| }); |
| } |
| |
| protected ArrayList<ComponentKey> getTitleMatchResult(String query) { |
| // Do an intersection of the words in the query and each title, and filter out all the |
| // apps that don't match all of the words in the query. |
| final String queryTextLower = query.toLowerCase(); |
| final String[] queryWords = SPLIT_PATTERN.split(queryTextLower); |
| |
| final ArrayList<ComponentKey> result = new ArrayList<>(); |
| for (AppInfo info : mApps) { |
| if (matches(info, queryWords)) { |
| result.add(info.toComponentKey()); |
| } |
| } |
| return result; |
| } |
| |
| protected boolean matches(AppInfo info, String[] queryWords) { |
| String title = info.title.toString(); |
| String[] words = SPLIT_PATTERN.split(title.toLowerCase()); |
| for (int qi = 0; qi < queryWords.length; qi++) { |
| boolean foundMatch = false; |
| for (int i = 0; i < words.length; i++) { |
| if (words[i].startsWith(queryWords[qi])) { |
| foundMatch = true; |
| break; |
| } |
| } |
| if (!foundMatch) { |
| // If there is a word in the query that does not match any words in this |
| // title, so skip it. |
| return false; |
| } |
| } |
| return true; |
| } |
| } |