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      1 /*
      2  * Copyright (C) 2013 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.inputmethod.latin;
     18 
     19 import android.app.AlertDialog;
     20 import android.content.Context;
     21 import android.content.DialogInterface;
     22 import android.content.DialogInterface.OnClickListener;
     23 import android.os.Environment;
     24 
     25 import com.android.inputmethod.latin.makedict.FormatSpec.FileHeader;
     26 
     27 import java.io.BufferedInputStream;
     28 import java.io.BufferedOutputStream;
     29 import java.io.File;
     30 import java.io.FileInputStream;
     31 import java.io.FileOutputStream;
     32 import java.io.IOException;
     33 import java.util.ArrayList;
     34 import java.util.Locale;
     35 
     36 /**
     37  * A class to read a local file as a dictionary for debugging purposes.
     38  */
     39 public class ExternalDictionaryGetterForDebug {
     40     private static final String SOURCE_FOLDER = Environment.getExternalStorageDirectory().getPath()
     41             + "/Download";
     42 
     43     private static String[] findDictionariesInTheDownloadedFolder() {
     44         final File[] files = new File(SOURCE_FOLDER).listFiles();
     45         final ArrayList<String> eligibleList = CollectionUtils.newArrayList();
     46         for (File f : files) {
     47             final FileHeader header = DictionaryInfoUtils.getDictionaryFileHeaderOrNull(f);
     48             if (null == header) continue;
     49             eligibleList.add(f.getName());
     50         }
     51         return eligibleList.toArray(new String[0]);
     52     }
     53 
     54     public static void chooseAndInstallDictionary(final Context context) {
     55         final String[] fileNames = findDictionariesInTheDownloadedFolder();
     56         if (0 == fileNames.length) {
     57             showNoFileDialog(context);
     58         } else if (1 == fileNames.length) {
     59             askInstallFile(context, fileNames[0]);
     60         } else {
     61             showChooseFileDialog(context, fileNames);
     62         }
     63     }
     64 
     65     private static void showNoFileDialog(final Context context) {
     66         new AlertDialog.Builder(context)
     67                 .setMessage(R.string.read_external_dictionary_no_files_message)
     68                 .setPositiveButton(android.R.string.ok, new OnClickListener() {
     69                     @Override
     70                     public void onClick(final DialogInterface dialog, final int which) {
     71                         dialog.dismiss();
     72                     }
     73                 }).create().show();
     74     }
     75 
     76     private static void showChooseFileDialog(final Context context, final String[] fileNames) {
     77         final AlertDialog.Builder builder = new AlertDialog.Builder(context);
     78         builder.setTitle(R.string.read_external_dictionary_multiple_files_title)
     79                 .setItems(fileNames, new OnClickListener() {
     80                     @Override
     81                     public void onClick(final DialogInterface dialog, final int which) {
     82                         askInstallFile(context, fileNames[which]);
     83                     }
     84                 })
     85                 .create().show();
     86     }
     87 
     88     private static void askInstallFile(final Context context, final String fileName) {
     89         final File file = new File(SOURCE_FOLDER, fileName.toString());
     90         final FileHeader header = DictionaryInfoUtils.getDictionaryFileHeaderOrNull(file);
     91         final StringBuilder message = new StringBuilder();
     92         final String locale = header.getLocaleString();
     93         for (String key : header.mDictionaryOptions.mAttributes.keySet()) {
     94             message.append(key + " = " + header.mDictionaryOptions.mAttributes.get(key));
     95             message.append("\n");
     96         }
     97         final String languageName = LocaleUtils.constructLocaleFromString(locale)
     98                 .getDisplayName(Locale.getDefault());
     99         final String title = String.format(
    100                 context.getString(R.string.read_external_dictionary_confirm_install_message),
    101                 languageName);
    102         new AlertDialog.Builder(context)
    103                 .setTitle(title)
    104                 .setMessage(message)
    105                 .setNegativeButton(android.R.string.cancel, new OnClickListener() {
    106                     @Override
    107                     public void onClick(final DialogInterface dialog, final int which) {
    108                         dialog.dismiss();
    109                     }
    110                 }).setPositiveButton(android.R.string.ok, new OnClickListener() {
    111                     @Override
    112                     public void onClick(final DialogInterface dialog, final int which) {
    113                         installFile(context, file, header);
    114                         dialog.dismiss();
    115                     }
    116                 }).create().show();
    117     }
    118 
    119     private static void installFile(final Context context, final File file,
    120             final FileHeader header) {
    121         BufferedOutputStream outputStream = null;
    122         File tempFile = null;
    123         try {
    124             final String locale = header.getLocaleString();
    125             // Create the id for a main dictionary for this locale
    126             final String id = BinaryDictionaryGetter.MAIN_DICTIONARY_CATEGORY
    127                     + BinaryDictionaryGetter.ID_CATEGORY_SEPARATOR + locale;
    128             final String finalFileName = DictionaryInfoUtils.getCacheFileName(id, locale, context);
    129             final String tempFileName = BinaryDictionaryGetter.getTempFileName(id, context);
    130             tempFile = new File(tempFileName);
    131             tempFile.delete();
    132             outputStream = new BufferedOutputStream(new FileOutputStream(tempFile));
    133             final BufferedInputStream bufferedStream = new BufferedInputStream(
    134                     new FileInputStream(file));
    135             BinaryDictionaryFileDumper.checkMagicAndCopyFileTo(bufferedStream, outputStream);
    136             outputStream.flush();
    137             final File finalFile = new File(finalFileName);
    138             finalFile.delete();
    139             if (!tempFile.renameTo(finalFile)) {
    140                 throw new IOException("Can't move the file to its final name");
    141             }
    142         } catch (IOException e) {
    143             // There was an error: show a dialog
    144             new AlertDialog.Builder(context)
    145                     .setTitle(R.string.error)
    146                     .setMessage(e.toString())
    147                     .setPositiveButton(android.R.string.ok, new OnClickListener() {
    148                         @Override
    149                         public void onClick(final DialogInterface dialog, final int which) {
    150                             dialog.dismiss();
    151                         }
    152                     }).create().show();
    153             return;
    154         } finally {
    155             try {
    156                 if (null != outputStream) outputStream.close();
    157                 if (null != tempFile) tempFile.delete();
    158             } catch (IOException e) {
    159                 // Don't do anything
    160             }
    161         }
    162     }
    163 }
    164