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.data; 18 19 import android.content.Context; 20 import android.net.Uri; 21 import android.os.Bundle; 22 import android.view.View; 23 24 import com.android.camera.debug.Log; 25 import com.android.camera.filmstrip.ImageData; 26 27 import java.util.Comparator; 28 29 /** 30 * An abstract interface that represents the local media data. Also implements 31 * Comparable interface so we can sort in DataAdapter. 32 * Note that all the sub-class of LocalData are designed to be immutable, i.e: 33 * all the members need to be final, and there is no setter. In this way, we 34 * can guarantee thread safety for LocalData. 35 */ 36 public interface LocalData extends ImageData { 37 /** 38 * An action callback to be used for actions on the local media data items. 39 */ 40 public static interface ActionCallback { 41 /** Plays the video with the given URI and title. */ 42 public void playVideo(Uri uri, String title); 43 } 44 45 static final Log.Tag TAG = new Log.Tag("LocalData"); 46 47 public static final String MIME_TYPE_JPEG = "image/jpeg"; 48 49 // Data actions. 50 public static final int DATA_ACTION_NONE = 0; 51 public static final int DATA_ACTION_PLAY = 1; 52 public static final int DATA_ACTION_DELETE = (1 << 1); 53 public static final int DATA_ACTION_EDIT = (1 << 2); 54 public static final int DATA_ACTION_SHARE = (1 << 3); 55 56 // Local data types. Returned by getLocalDataType(). 57 /** 58 * Constant for denoting a camera preview. 59 */ 60 public static final int LOCAL_CAMERA_PREVIEW = 1; 61 /** 62 * Constant for denoting an arbitrary view. 63 */ 64 public static final int LOCAL_VIEW = 2; 65 /** 66 * Constant for denoting a still image. 67 */ 68 public static final int LOCAL_IMAGE = 3; 69 /** 70 * Constant for denoting a video. 71 */ 72 public static final int LOCAL_VIDEO = 4; 73 /** 74 * Constant for denoting an in-progress item which should not be touched 75 * before the related task is done. Data of this type should not support 76 * any actions like sharing, editing, etc. 77 */ 78 public static final int LOCAL_IN_PROGRESS_DATA = 5; 79 80 // TODO: Re-think how the in-progress logic works. We shouldn't need to pass 81 // in the information about whether this session is in progress. 82 83 /** 84 * Creates View to represent media. 85 * 86 * @param context The {@link android.content.Context} to create the view. 87 * @param thumbWidth Width in pixels of the suggested zoomed out view/image size. 88 * @param thumbHeight Height in pixels of the suggested zoomed out view/image size. 89 * @param adapter Data adapter for this data item. 90 */ 91 View getView(Context context, View recycled, int thumbWidth, int thumbHeight, 92 int placeHolderResourceId, LocalDataAdapter adapter, boolean isInProgress, 93 ActionCallback actionCallback); 94 95 /** Returns a unique identifier for the view created by this data so that the view 96 * can be reused. 97 * 98 * @see android.widget.BaseAdapter#getItemViewType(int) 99 */ 100 LocalDataViewType getItemViewType(); 101 102 /** 103 * Request resize of View created by getView(). 104 * 105 * @param context The {@link android.content.Context} to create the view. 106 * @param thumbWidth Width in pixels of the suggested zoomed out view/image size. 107 * @param thumbHeight Height in pixels of the suggested zoomed out view/image size. 108 * @param view View created by getView(); 109 * @param adapter Data adapter for this data item. 110 */ 111 public void loadFullImage(Context context, int thumbWidth, int thumbHeight, View view, 112 LocalDataAdapter adapter); 113 114 /** 115 * Gets the date when this data is created. The returned date is also used 116 * for sorting data. Value is epoch milliseconds. 117 * 118 * @return The date when this data is created. 119 * @see {@link NewestFirstComparator} 120 */ 121 long getDateTaken(); 122 123 /** 124 * Gets the date when this data is modified. The returned date is also used 125 * for sorting data. Value is epoch seconds. 126 * 127 * @return The date when this data is modified. 128 * @see {@link NewestFirstComparator} 129 */ 130 long getDateModified(); 131 132 /** Gets the title of this data */ 133 String getTitle(); 134 135 /** 136 * Checks if the data actions (delete/play ...) can be applied on this data. 137 * 138 * @param actions The actions to check. 139 * @return Whether all the actions are supported. 140 */ 141 boolean isDataActionSupported(int actions); 142 143 /** Removes the data from the storage if possible. */ 144 boolean delete(Context c); 145 146 void onFullScreen(boolean fullScreen); 147 148 /** Returns {@code true} if it allows swipe to filmstrip in full screen. */ 149 boolean canSwipeInFullScreen(); 150 151 /** 152 * Returns the path to the data on the storage. 153 * 154 * @return Empty path if there's none. 155 */ 156 String getPath(); 157 158 /** 159 * @return The mimetype of this data item, or null, if this item has no 160 * mimetype associated with it. 161 */ 162 String getMimeType(); 163 164 /** 165 * @return The media details (such as EXIF) for the data. {@code null} if 166 * not available for the data. 167 */ 168 MediaDetails getMediaDetails(Context context); 169 170 /** 171 * Returns the type of the local data defined by {@link LocalData}. 172 * 173 * @return The local data type. Could be one of the following: 174 * {@code LOCAL_CAMERA_PREVIEW}, {@code LOCAL_VIEW}, {@code LOCAL_IMAGE}, 175 * {@code LOCAL_VIDEO}, {@code LOCAL_PHOTO_SPHERE}, 176 * {@code LOCAL_360_PHOTO_SPHERE}, and {@code LOCAL_RGBZ} 177 */ 178 int getLocalDataType(); 179 180 /** 181 * @return The size of the data in bytes 182 */ 183 long getSizeInBytes(); 184 185 /** 186 * Refresh the data content. 187 * 188 * @param context The Android {@link android.content.Context}. 189 * @return A new LocalData object if success, null otherwise. 190 */ 191 LocalData refresh(Context context); 192 193 /** 194 * @return the {@link android.content.ContentResolver} Id of the data. 195 */ 196 long getContentId(); 197 198 /** 199 * @return the metadata. Should never be {@code null}. 200 */ 201 Bundle getMetadata(); 202 203 /** 204 * Any media store attribute that can potentially change the local data 205 * should be included in this signature, primarily oriented at detecting 206 * edits. 207 * 208 * @return A string identifying the set of changeable attributes. 209 */ 210 String getSignature(); 211 212 /** 213 * @return whether the metadata is updated. 214 */ 215 public boolean isMetadataUpdated(); 216 217 static class NewestFirstComparator implements Comparator<LocalData> { 218 219 /** Compare taken/modified date of LocalData in descent order to make 220 newer data in the front. 221 The negative numbers here are always considered "bigger" than 222 positive ones. Thus, if any one of the numbers is negative, the logic 223 is reversed. */ 224 private static int compareDate(long v1, long v2) { 225 if (v1 >= 0 && v2 >= 0) { 226 return ((v1 < v2) ? 1 : ((v1 > v2) ? -1 : 0)); 227 } 228 return ((v2 < v1) ? 1 : ((v2 > v1) ? -1 : 0)); 229 } 230 231 @Override 232 public int compare(LocalData d1, LocalData d2) { 233 int cmp = compareDate(d1.getDateTaken(), d2.getDateTaken()); 234 if (cmp == 0) { 235 cmp = compareDate(d1.getDateModified(), d2.getDateModified()); 236 } 237 if (cmp == 0) { 238 cmp = d1.getTitle().compareTo(d2.getTitle()); 239 } 240 return cmp; 241 } 242 } 243 } 244
