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