src/com/owncloud/android/DisplayUtils.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2011  Bartek Przybylski
   3  *   Copyright (C) 2012-2013 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation, either version 3 of the License, or
   8  *   (at your option) any later version.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *   GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 package com.owncloud.android;
  21
  22 import java.util.Arrays;
  23 import java.util.Date;
  24 import java.util.HashMap;
  25 import java.util.HashSet;
  26 import java.util.Set;
  27
  28 import android.util.Log;
  29
  30 /**
  31  * A helper class for some string operations.
  32  *
  33  * @author Bartek Przybylski
  34  * @author David A. Velasco
  35  */
  36 public class DisplayUtils {
  37
  38     private static String TAG = DisplayUtils.class.getSimpleName();
  39
  40     private static final String[] sizeSuffixes = { "B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };
  41
  42     private static HashMap<String, String> mimeType2HUmanReadable;
  43     static {
  44         mimeType2HUmanReadable = new HashMap<String, String>();
  45         // images
  46         mimeType2HUmanReadable.put("image/jpeg", "JPEG image");
  47         mimeType2HUmanReadable.put("image/jpg", "JPEG image");
  48         mimeType2HUmanReadable.put("image/png", "PNG image");
  49         mimeType2HUmanReadable.put("image/bmp", "Bitmap image");
  50         mimeType2HUmanReadable.put("image/gif", "GIF image");
  51         mimeType2HUmanReadable.put("image/svg+xml", "JPEG image");
  52         mimeType2HUmanReadable.put("image/tiff", "TIFF image");
  53         // music
  54         mimeType2HUmanReadable.put("audio/mpeg", "MP3 music file");
  55         mimeType2HUmanReadable.put("application/ogg", "OGG music file");
  56
  57     }
  58
  59     private static final String TYPE_APPLICATION = "application";
  60     private static final String TYPE_AUDIO = "audio";
  61     private static final String TYPE_IMAGE = "image";
  62     private static final String TYPE_TXT = "text";
  63     private static final String TYPE_VIDEO = "video";
  64
  65     private static final String SUBTYPE_PDF = "pdf";
  66     private static final String[] SUBTYPES_DOCUMENT = { "msword", "mspowerpoint", "msexcel",
  67                                                         "vnd.oasis.opendocument.presentation",
  68                                                         "vnd.oasis.opendocument.spreadsheet",
  69                                                         "vnd.oasis.opendocument.text"
  70                                                         };
  71     private static Set<String> SUBTYPES_DOCUMENT_SET = new HashSet<String>(Arrays.asList(SUBTYPES_DOCUMENT));
  72     private static final String[] SUBTYPES_COMPRESSED = {"x-tar", "x-gzip", "zip"};
  73     private static final Set<String> SUBTYPES_COMPRESSED_SET = new HashSet<String>(Arrays.asList(SUBTYPES_COMPRESSED));
  74
  75     /**
  76      * Converts the file size in bytes to human readable output.
  77      *
  78      * @param bytes Input file size
  79      * @return Like something readable like "12 MB"
  80      */
  81     public static String bytesToHumanReadable(long bytes) {
  82         double result = bytes;
  83         int attachedsuff = 0;
  84         while (result > 1024 && attachedsuff < sizeSuffixes.length) {
  85             result /= 1024.;
  86             attachedsuff++;
  87         }
  88         result = ((int) (result * 100)) / 100.;
  89         return result + " " + sizeSuffixes[attachedsuff];
  90     }
  91
  92     /**
  93      * Removes special HTML entities from a string
  94      *
  95      * @param s Input string
  96      * @return A cleaned version of the string
  97      */
  98     public static String HtmlDecode(String s) {
  99         /*
 100          * TODO: Perhaps we should use something more proven like:
 101          * http://commons.apache.org/lang/api-2.6/org/apache/commons/lang/StringEscapeUtils.html#unescapeHtml%28java.lang.String%29
 102          */
 103
 104         String ret = "";
 105         for (int i = 0; i < s.length(); ++i) {
 106             if (s.charAt(i) == '%') {
 107                 ret += (char) Integer.parseInt(s.substring(i + 1, i + 3), 16);
 108                 i += 2;
 109             } else {
 110                 ret += s.charAt(i);
 111             }
 112         }
 113         return ret;
 114     }
 115
 116     /**
 117      * Converts MIME types like "image/jpg" to more end user friendly output
 118      * like "JPG image".
 119      *
 120      * @param mimetype MIME type to convert
 121      * @return A human friendly version of the MIME type
 122      */
 123     public static String convertMIMEtoPrettyPrint(String mimetype) {
 124         if (mimeType2HUmanReadable.containsKey(mimetype)) {
 125             return mimeType2HUmanReadable.get(mimetype);
 126         }
 127         if (mimetype.split("/").length >= 2)
 128             return mimetype.split("/")[1].toUpperCase() + " file";
 129         return "Unknown type";
 130     }
 131
 132
 133     /**
 134      * Returns the resource identifier of an image resource to use as icon associated to a
 135      * known MIME type.
 136      *
 137      * @param mimetype      MIME type string.
 138      * @return              Resource identifier of an image resource.
 139      */
 140     public static int getResourceId(String mimetype) {
 141
 142         if (mimetype == null || "DIR".equals(mimetype)) {
 143             return R.drawable.ic_menu_archive;
 144
 145         } else {
 146             String [] parts = mimetype.split("/");
 147             String type = parts[0];
 148             String subtype = parts[1];
 149
 150             if(TYPE_TXT.equals(type)) {
 151                 return R.drawable.file_doc;
 152
 153             } else if(TYPE_IMAGE.equals(type)) {
 154                 return R.drawable.file_image;
 155
 156             } else if(TYPE_VIDEO.equals(type)) {
 157                 return R.drawable.file_movie;
 158
 159             } else if(TYPE_AUDIO.equals(type)) {
 160                 return R.drawable.file_sound;
 161
 162             } else if(TYPE_APPLICATION.equals(type)) {
 163
 164                 if (SUBTYPE_PDF.equals(subtype)) {
 165                     return R.drawable.file_pdf;
 166
 167                 } else if (SUBTYPES_DOCUMENT_SET.contains(subtype)) {
 168                     return R.drawable.file_doc;
 169
 170                 } else if (SUBTYPES_COMPRESSED_SET.contains(subtype)) {
 171                     return R.drawable.file_zip;
 172                 }
 173
 174             }
 175             // problems: RAR, RTF, 3GP are send as application/octet-stream from the server ; extension in the filename should be explicitly reviewed
 176         }
 177
 178         // default icon
 179         return R.drawable.file;
 180     }
 181
 182
 183
 184     /**
 185      * Converts Unix time to human readable format
 186      * @param miliseconds that have passed since 01/01/1970
 187      * @return The human readable time for the users locale
 188      */
 189     public static String unixTimeToHumanReadable(long milliseconds) {
 190         Date date = new Date(milliseconds);
 191         return date.toLocaleString();
 192     }
 193 }