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