diff options
Diffstat (limited to 'src/com/android/launcher3/allapps/DefaultAppSearchAlgorithm.java')
-rw-r--r-- | src/com/android/launcher3/allapps/DefaultAppSearchAlgorithm.java | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/src/com/android/launcher3/allapps/DefaultAppSearchAlgorithm.java b/src/com/android/launcher3/allapps/DefaultAppSearchAlgorithm.java new file mode 100644 index 000000000..10740ec77 --- /dev/null +++ b/src/com/android/launcher3/allapps/DefaultAppSearchAlgorithm.java @@ -0,0 +1,94 @@ +/* + * 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; + } +} |