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      1 /*
      2  * Copyright (C) 2010 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 
     17 package com.android.contacts.util;
     18 
     19 import android.accounts.AccountManager;
     20 import android.accounts.AuthenticatorDescription;
     21 import android.content.Context;
     22 import android.content.pm.PackageManager;
     23 import android.content.pm.PackageManager.NameNotFoundException;
     24 import android.content.res.Resources;
     25 import android.content.res.Resources.NotFoundException;
     26 import android.content.res.TypedArray;
     27 import android.content.res.XmlResourceParser;
     28 import android.util.AttributeSet;
     29 import android.util.Xml;
     30 
     31 import com.android.contacts.R;
     32 import com.android.contacts.model.account.ExternalAccountType;
     33 
     34 import org.xmlpull.v1.XmlPullParser;
     35 import org.xmlpull.v1.XmlPullParserException;
     36 
     37 import java.io.IOException;
     38 
     39 /**
     40  * Retrieves localized names per account type. This allows customizing texts like
     41  * "All Contacts" for certain account types, but e.g. "All Friends" or "All Connections" for others.
     42  */
     43 public class LocalizedNameResolver  {
     44     private static final String TAG = "LocalizedNameResolver";
     45 
     46     private static final String CONTACTS_DATA_KIND = "ContactsDataKind";
     47 
     48     /**
     49      * Returns the name for All Contacts for the specified account type.
     50      */
     51     public static String getAllContactsName(Context context, String accountType) {
     52         if (context == null) throw new IllegalArgumentException("Context must not be null");
     53         if (accountType == null) return null;
     54 
     55         return resolveAllContactsName(context, accountType);
     56      }
     57 
     58     /**
     59      * Finds "All Contacts"-Name for the specified account type.
     60      */
     61     private static String resolveAllContactsName(Context context, String accountType) {
     62         final AccountManager am = AccountManager.get(context);
     63 
     64         for (AuthenticatorDescription auth : am.getAuthenticatorTypes()) {
     65             if (accountType.equals(auth.type)) {
     66                 return resolveAllContactsNameFromMetaData(context, auth.packageName);
     67             }
     68         }
     69 
     70         return null;
     71     }
     72 
     73     /**
     74      * Finds the meta-data XML containing the contacts configuration and
     75      * reads the picture priority from that file.
     76      */
     77     private static String resolveAllContactsNameFromMetaData(Context context, String packageName) {
     78         final XmlResourceParser parser = ExternalAccountType.loadContactsXml(context, packageName);
     79         if (parser != null) {
     80             return loadAllContactsNameFromXml(context, parser, packageName);
     81         }
     82         return null;
     83     }
     84 
     85     private static String loadAllContactsNameFromXml(Context context, XmlPullParser parser,
     86             String packageName) {
     87         try {
     88             final AttributeSet attrs = Xml.asAttributeSet(parser);
     89             int type;
     90             while ((type = parser.next()) != XmlPullParser.START_TAG
     91                     && type != XmlPullParser.END_DOCUMENT) {
     92                 // Drain comments and whitespace
     93             }
     94 
     95             if (type != XmlPullParser.START_TAG) {
     96                 throw new IllegalStateException("No start tag found");
     97             }
     98 
     99             final int depth = parser.getDepth();
    100             while (((type = parser.next()) != XmlPullParser.END_TAG || parser.getDepth() > depth)
    101                     && type != XmlPullParser.END_DOCUMENT) {
    102                 String name = parser.getName();
    103                 if (type == XmlPullParser.START_TAG && CONTACTS_DATA_KIND.equals(name)) {
    104                     final TypedArray typedArray = context.obtainStyledAttributes(attrs,
    105                             R.styleable.ContactsDataKind);
    106                     try {
    107                         // See if a string has been hardcoded directly into the xml
    108                         final String nonResourceString = typedArray.getNonResourceString(
    109                                 R.styleable.ContactsDataKind_android_allContactsName);
    110                         if (nonResourceString != null) {
    111                             return nonResourceString;
    112                         }
    113 
    114                         // See if a resource is referenced. We can't rely on getString
    115                         // to automatically resolve it as the resource lives in a different package
    116                         int id = typedArray.getResourceId(
    117                                 R.styleable.ContactsDataKind_android_allContactsName, 0);
    118                         if (id == 0) return null;
    119 
    120                         // Resolve the resource Id
    121                         final PackageManager packageManager = context.getPackageManager();
    122                         final Resources resources;
    123                         try {
    124                             resources = packageManager.getResourcesForApplication(packageName);
    125                         } catch (NameNotFoundException e) {
    126                             return null;
    127                         }
    128                         try {
    129                             return resources.getString(id);
    130                         } catch (NotFoundException e) {
    131                             return null;
    132                         }
    133                     } finally {
    134                         typedArray.recycle();
    135                     }
    136                 }
    137             }
    138             return null;
    139         } catch (XmlPullParserException e) {
    140             throw new IllegalStateException("Problem reading XML", e);
    141         } catch (IOException e) {
    142             throw new IllegalStateException("Problem reading XML", e);
    143         }
    144     }
    145 }
    146