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
17package com.android.camera.ui;
18
19import android.app.AlertDialog;
20import android.app.Dialog;
21import android.content.Context;
22import android.content.DialogInterface;
23import android.graphics.Bitmap;
24import android.graphics.BitmapFactory;
25import android.text.format.Formatter;
26import android.view.LayoutInflater;
27import android.view.View;
28import android.view.ViewGroup;
29import android.widget.BaseAdapter;
30import android.widget.ListView;
31import android.widget.TextView;
32
33import com.android.camera.data.MediaDetails;
34import com.android.camera2.R;
35
36import java.text.DecimalFormat;
37import java.text.NumberFormat;
38import java.util.ArrayList;
39import java.util.Locale;
40import java.util.Map.Entry;
41
42/**
43 * Displays details (such as Exif) of a local media item.
44 */
45public 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     */
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