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.camera.ui;
18 
19 import android.app.AlertDialog;
20 import android.app.Dialog;
21 import android.content.Context;
22 import android.content.DialogInterface;
23 import android.graphics.Bitmap;
24 import android.graphics.BitmapFactory;
25 import android.text.format.Formatter;
26 import android.view.LayoutInflater;
27 import android.view.View;
28 import android.view.ViewGroup;
29 import android.widget.BaseAdapter;
30 import android.widget.ListView;
31 import android.widget.TextView;
32 
33 import com.android.camera.data.MediaDetails;
34 import com.android.camera2.R;
35 
36 import java.text.DecimalFormat;
37 import java.text.NumberFormat;
38 import java.util.ArrayList;
39 import java.util.Locale;
40 import java.util.Map.Entry;
41 
42 /**
43  * Displays details (such as Exif) of a local media item.
44  */
45 public class DetailsDialog {
46 
47     /**
48      * Creates a dialog for showing media data.
49      *
50      * @param context the Android context.
51      * @param mediaDetails the media details to display.
52      * @return A dialog that can be made visible to show the media details.
53      */
create(Context context, MediaDetails mediaDetails)54     public static Dialog create(Context context, MediaDetails mediaDetails) {
55         ListView detailsList = (ListView) LayoutInflater.from(context).inflate(
56                 R.layout.details_list, null, false);
57         detailsList.setAdapter(new DetailsAdapter(context, mediaDetails));
58 
59         final AlertDialog.Builder builder =
60                 new AlertDialog.Builder(context);
61         return builder.setTitle(R.string.details).setView(detailsList)
62                 .setPositiveButton(R.string.close, new DialogInterface.OnClickListener() {
63                     @Override
64                     public void onClick(DialogInterface dialog, int whichButton) {
65                         dialog.dismiss();
66                     }
67                 }).create();
68     }
69 
70     /**
71      * An adapter for feeding a details list view with the contents of a
72      * {@link MediaDetails} instance.
73      */
74     private static class DetailsAdapter extends BaseAdapter {
75         private final Context mContext;
76         private final MediaDetails mMediaDetails;
77         private final ArrayList<String> mItems;
78         private final Locale mDefaultLocale = Locale.getDefault();
79         private final DecimalFormat mDecimalFormat = new DecimalFormat(".####");
80         private int mWidthIndex = -1;
81         private int mHeightIndex = -1;
82 
83         public DetailsAdapter(Context context, MediaDetails details) {
84             mContext = context;
85             mMediaDetails = details;
86             mItems = new ArrayList<String>(details.size());
87             setDetails(context, details);
88         }
89 
90         private void setDetails(Context context, MediaDetails details) {
91             boolean resolutionIsValid = true;
92             String path = null;
93             for (Entry<Integer, Object> detail : details) {
94                 String value;
95                 switch (detail.getKey()) {
96                     case MediaDetails.INDEX_SIZE: {
97                         value = Formatter.formatFileSize(
98                                 context, (Long) detail.getValue());
99                         break;
100                     }
101                     case MediaDetails.INDEX_WHITE_BALANCE: {
102                         value = "1".equals(detail.getValue())
103                                 ? context.getString(R.string.manual)
104                                 : context.getString(R.string.auto);
105                         break;
106                     }
107                     case MediaDetails.INDEX_FLASH: {
108                         MediaDetails.FlashState flash =
109                                 (MediaDetails.FlashState) detail.getValue();
110                         // TODO: camera doesn't fill in the complete values,
111                         // show more information when it is fixed.
112                         if (flash.isFlashFired()) {
113                             value = context.getString(R.string.flash_on);
114                         } else {
115                             value = context.getString(R.string.flash_off);
116                         }
117                         break;
118                     }
119                     case MediaDetails.INDEX_EXPOSURE_TIME: {
120                         value = (String) detail.getValue();
121                         double time = Double.valueOf(value);
122                         if (time < 1.0f) {
123                             value = String.format(mDefaultLocale, "%d/%d", 1,
124                                     (int) (0.5f + 1 / time));
125                         } else {
126                             int integer = (int) time;
127                             time -= integer;
128                             value = String.valueOf(integer) + "''";
129                             if (time > 0.0001) {
130                                 value += String.format(mDefaultLocale, " %d/%d", 1,
131                                         (int) (0.5f + 1 / time));
132                             }
133                         }
134                         break;
135                     }
136                     case MediaDetails.INDEX_WIDTH:
137                         mWidthIndex = mItems.size();
138                         if (detail.getValue().toString().equalsIgnoreCase("0")) {
139                             value = context.getString(R.string.unknown);
140                             resolutionIsValid = false;
141                         } else {
142                             value = toLocalInteger(detail.getValue());
143                         }
144                         break;
145                     case MediaDetails.INDEX_HEIGHT: {
146                         mHeightIndex = mItems.size();
147                         if (detail.getValue().toString().equalsIgnoreCase("0")) {
148                             value = context.getString(R.string.unknown);
149                             resolutionIsValid = false;
150                         } else {
151                             value = toLocalInteger(detail.getValue());
152                         }
153                         break;
154                     }
155                     case MediaDetails.INDEX_PATH:
156                         // Prepend the new-line as a) paths are usually long, so
157                         // the formatting is better and b) an RTL UI will see it
158                         // as a separate section and interpret it for what it
159                         // is, rather than trying to make it RTL (which messes
160                         // up the path).
161                         value = "\n" + detail.getValue().toString();
162                         path = detail.getValue().toString();
163                         break;
164                     case MediaDetails.INDEX_ORIENTATION:
165                         value = toLocalInteger(detail.getValue());
166                         break;
167                     case MediaDetails.INDEX_ISO:
168                         value = toLocalNumber(Integer.parseInt((String) detail.getValue()));
169                         break;
170                     case MediaDetails.INDEX_FOCAL_LENGTH:
171                         double focalLength = Double.parseDouble(detail.getValue().toString());
172                         value = toLocalNumber(focalLength);
173                         break;
174                     default: {
175                         Object valueObj = detail.getValue();
176                         // This shouldn't happen, log its key to help us
177                         // diagnose the problem.
178                         if (valueObj == null) {
179                             fail("%s's value is Null",
180                                     getDetailsName(context,
181                                             detail.getKey()));
182                         }
183                         value = valueObj.toString();
184                     }
185                 }
186                 int key = detail.getKey();
187                 if (details.hasUnit(key)) {
188                     value = String.format("%s: %s %s", getDetailsName(
189                             context, key), value, context.getString(details.getUnit(key)));
190                 } else {
191                     value = String.format("%s: %s", getDetailsName(
192                             context, key), value);
193                 }
194                 mItems.add(value);
195             }
196             if (!resolutionIsValid) {
197                 resolveResolution(path);
198             }
199         }
200 
201         public void resolveResolution(String path) {
202             Bitmap bitmap = BitmapFactory.decodeFile(path);
203             if (bitmap == null)
204                 return;
205             onResolutionAvailable(bitmap.getWidth(), bitmap.getHeight());
206         }
207 
208         @Override
209         public boolean areAllItemsEnabled() {
210             return false;
211         }
212 
213         @Override
214         public boolean isEnabled(int position) {
215             return false;
216         }
217 
218         @Override
219         public int getCount() {
220             return mItems.size();
221         }
222 
223         @Override
224         public Object getItem(int position) {
225             return mMediaDetails.getDetail(position);
226         }
227 
228         @Override
229         public long getItemId(int position) {
230             return position;
231         }
232 
233         @Override
234         public View getView(int position, View convertView, ViewGroup parent) {
235             TextView tv;
236             if (convertView == null) {
237                 tv = (TextView) LayoutInflater.from(mContext).inflate(
238                         R.layout.details, parent, false);
239             } else {
240                 tv = (TextView) convertView;
241             }
242             tv.setText(mItems.get(position));
243             return tv;
244         }
245 
246         public void onResolutionAvailable(int width, int height) {
247             if (width == 0 || height == 0)
248                 return;
249             // Update the resolution with the new width and height
250             String widthString = String.format(mDefaultLocale, "%s: %d",
251                     getDetailsName(
252                             mContext, MediaDetails.INDEX_WIDTH), width);
253             String heightString = String.format(mDefaultLocale, "%s: %d",
254                     getDetailsName(
255                             mContext, MediaDetails.INDEX_HEIGHT), height);
256             mItems.set(mWidthIndex, String.valueOf(widthString));
257             mItems.set(mHeightIndex, String.valueOf(heightString));
258             notifyDataSetChanged();
259         }
260 
261         /**
262          * Converts the given integer (given as String or Integer object) to a
263          * localized String version.
264          */
265         private String toLocalInteger(Object valueObj) {
266             if (valueObj instanceof Integer) {
267                 return toLocalNumber((Integer) valueObj);
268             } else {
269                 String value = valueObj.toString();
270                 try {
271                     value = toLocalNumber(Integer.parseInt(value));
272                 } catch (NumberFormatException ex) {
273                     // Just keep the current "value" if we cannot
274                     // parse it as a fallback.
275                 }
276                 return value;
277             }
278         }
279 
280         /** Converts the given integer to a localized String version. */
281         private String toLocalNumber(int n) {
282             return String.format(mDefaultLocale, "%d", n);
283         }
284 
285         /** Converts the given double to a localized String version. */
286         private String toLocalNumber(double n) {
287             return mDecimalFormat.format(n);
288         }
289     }
290 
291     public static String getDetailsName(Context context, int key) {
292         switch (key) {
293             case MediaDetails.INDEX_TITLE:
294                 return context.getString(R.string.title);
295             case MediaDetails.INDEX_DESCRIPTION:
296                 return context.getString(R.string.description);
297             case MediaDetails.INDEX_DATETIME:
298                 return context.getString(R.string.time);
299             case MediaDetails.INDEX_LOCATION:
300                 return context.getString(R.string.location);
301             case MediaDetails.INDEX_PATH:
302                 return context.getString(R.string.path);
303             case MediaDetails.INDEX_WIDTH:
304                 return context.getString(R.string.width);
305             case MediaDetails.INDEX_HEIGHT:
306                 return context.getString(R.string.height);
307             case MediaDetails.INDEX_ORIENTATION:
308                 return context.getString(R.string.orientation);
309             case MediaDetails.INDEX_DURATION:
310                 return context.getString(R.string.duration);
311             case MediaDetails.INDEX_MIMETYPE:
312                 return context.getString(R.string.mimetype);
313             case MediaDetails.INDEX_SIZE:
314                 return context.getString(R.string.file_size);
315             case MediaDetails.INDEX_MAKE:
316                 return context.getString(R.string.maker);
317             case MediaDetails.INDEX_MODEL:
318                 return context.getString(R.string.model);
319             case MediaDetails.INDEX_FLASH:
320                 return context.getString(R.string.flash);
321             case MediaDetails.INDEX_APERTURE:
322                 return context.getString(R.string.aperture);
323             case MediaDetails.INDEX_FOCAL_LENGTH:
324                 return context.getString(R.string.focal_length);
325             case MediaDetails.INDEX_WHITE_BALANCE:
326                 return context.getString(R.string.white_balance);
327             case MediaDetails.INDEX_EXPOSURE_TIME:
328                 return context.getString(R.string.exposure_time);
329             case MediaDetails.INDEX_ISO:
330                 return context.getString(R.string.iso);
331             default:
332                 return "Unknown key" + key;
333         }
334     }
335 
336     /**
337      * Throw an assertion error wit the given message.
338      *
339      * @param message the message, can contain placeholders.
340      * @param args if he message contains placeholders, these values will be
341      *            used to fill them.
342      */
343     private static void fail(String message, Object... args) {
344         throw new AssertionError(
345                 args.length == 0 ? message : String.format(message, args));
346     }
347 }
348