Sunny Goyal
100 lines
3.7 KiB
Java
100 lines
3.7 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.model;
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import android.content.Context;
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import com.android.launcher3.AppInfo;
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import com.android.launcher3.ItemInfo;
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import com.android.launcher3.util.Thunk;
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import java.text.Collator;
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import java.util.Comparator;
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/**
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* Class to manage access to an app name comparator.
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* <p>
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* Used to sort application name in all apps view and widget tray view.
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*/
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public class AppNameComparator {
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private final Collator mCollator;
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private final AbstractUserComparator<ItemInfo> mAppInfoComparator;
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private final Comparator<String> mSectionNameComparator;
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public AppNameComparator(Context context) {
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mCollator = Collator.getInstance();
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mAppInfoComparator = new AbstractUserComparator<ItemInfo>(context) {
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@Override
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public final int compare(ItemInfo a, ItemInfo b) {
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// Order by the title in the current locale
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int result = compareTitles(a.title.toString(), b.title.toString());
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if (result == 0 && a instanceof AppInfo && b instanceof AppInfo) {
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AppInfo aAppInfo = (AppInfo) a;
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AppInfo bAppInfo = (AppInfo) b;
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// If two apps have the same title, then order by the component name
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result = aAppInfo.componentName.compareTo(bAppInfo.componentName);
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if (result == 0) {
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// If the two apps are the same component, then prioritize by the order that
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// the app user was created (prioritizing the main user's apps)
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return super.compare(a, b);
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}
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}
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return result;
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}
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};
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mSectionNameComparator = new Comparator<String>() {
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@Override
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public int compare(String o1, String o2) {
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return compareTitles(o1, o2);
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}
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};
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}
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/**
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* Returns a locale-aware comparator that will alphabetically order a list of applications.
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*/
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public Comparator<ItemInfo> getAppInfoComparator() {
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return mAppInfoComparator;
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}
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/**
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* Returns a locale-aware comparator that will alphabetically order a list of section names.
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*/
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public Comparator<String> getSectionNameComparator() {
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return mSectionNameComparator;
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}
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/**
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* Compares two titles with the same return value semantics as Comparator.
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*/
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@Thunk int compareTitles(String titleA, String titleB) {
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// Ensure that we de-prioritize any titles that don't start with a linguistic letter or digit
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boolean aStartsWithLetter = (titleA.length() > 0) &&
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Character.isLetterOrDigit(titleA.codePointAt(0));
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boolean bStartsWithLetter = (titleB.length() > 0) &&
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Character.isLetterOrDigit(titleB.codePointAt(0));
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if (aStartsWithLetter && !bStartsWithLetter) {
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return -1;
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} else if (!aStartsWithLetter && bStartsWithLetter) {
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return 1;
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}
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// Order by the title in the current locale
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return mCollator.compare(titleA, titleB);
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}
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}
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