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.documentsui; 18 19 import static com.android.documentsui.Shared.DEBUG; 20 import static com.android.documentsui.model.DocumentInfo.getCursorString; 21 22 import android.content.ContentProvider; 23 import android.content.ContentResolver; 24 import android.content.ContentValues; 25 import android.content.Context; 26 import android.content.Intent; 27 import android.content.UriMatcher; 28 import android.content.pm.ResolveInfo; 29 import android.database.Cursor; 30 import android.database.sqlite.SQLiteDatabase; 31 import android.database.sqlite.SQLiteOpenHelper; 32 import android.net.Uri; 33 import android.os.Bundle; 34 import android.provider.DocumentsContract; 35 import android.provider.DocumentsContract.Document; 36 import android.provider.DocumentsContract.Root; 37 import android.text.format.DateUtils; 38 import android.util.Log; 39 40 import com.android.documentsui.model.DocumentStack; 41 import com.android.documentsui.model.DurableUtils; 42 import com.android.internal.util.Predicate; 43 44 import com.google.android.collect.Sets; 45 46 import libcore.io.IoUtils; 47 48 import java.io.IOException; 49 import java.util.Set; 50 51 public class RecentsProvider extends ContentProvider { 52 private static final String TAG = "RecentsProvider"; 53 54 private static final long MAX_HISTORY_IN_MILLIS = 45 * DateUtils.DAY_IN_MILLIS; 55 56 private static final String AUTHORITY = "com.android.documentsui.recents"; 57 58 private static final UriMatcher sMatcher = new UriMatcher(UriMatcher.NO_MATCH); 59 60 private static final int URI_RECENT = 1; 61 private static final int URI_STATE = 2; 62 private static final int URI_RESUME = 3; 63 64 public static final String METHOD_PURGE = "purge"; 65 public static final String METHOD_PURGE_PACKAGE = "purgePackage"; 66 67 static { 68 sMatcher.addURI(AUTHORITY, "recent", URI_RECENT); 69 // state/authority/rootId/docId 70 sMatcher.addURI(AUTHORITY, "state/*/*/*", URI_STATE); 71 // resume/packageName 72 sMatcher.addURI(AUTHORITY, "resume/*", URI_RESUME); 73 } 74 75 public static final String TABLE_RECENT = "recent"; 76 public static final String TABLE_STATE = "state"; 77 public static final String TABLE_RESUME = "resume"; 78 79 public static class RecentColumns { 80 public static final String KEY = "key"; 81 public static final String STACK = "stack"; 82 public static final String TIMESTAMP = "timestamp"; 83 } 84 85 public static class StateColumns { 86 public static final String AUTHORITY = "authority"; 87 public static final String ROOT_ID = Root.COLUMN_ROOT_ID; 88 public static final String DOCUMENT_ID = Document.COLUMN_DOCUMENT_ID; 89 90 @Deprecated // mode is tracked in local preferences now...by root only 91 public static final String MODE = "mode"; 92 public static final String SORT_ORDER = "sortOrder"; 93 } 94 95 public static class ResumeColumns { 96 public static final String PACKAGE_NAME = "package_name"; 97 public static final String STACK = "stack"; 98 public static final String TIMESTAMP = "timestamp"; 99 // Indicates handler was an external app, like photos. 100 public static final String EXTERNAL = "external"; 101 } 102 103 public static Uri buildRecent() { 104 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT) 105 .authority(AUTHORITY).appendPath("recent").build(); 106 } 107 108 public static Uri buildState(String authority, String rootId, String documentId) { 109 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT).authority(AUTHORITY) 110 .appendPath("state").appendPath(authority).appendPath(rootId).appendPath(documentId) 111 .build(); 112 } 113 114 public static Uri buildResume(String packageName) { 115 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT) 116 .authority(AUTHORITY).appendPath("resume").appendPath(packageName).build(); 117 } 118 119 private DatabaseHelper mHelper; 120 121 private static class DatabaseHelper extends SQLiteOpenHelper { 122 private static final String DB_NAME = "recents.db"; 123 124 private static final int VERSION_INIT = 1; 125 private static final int VERSION_AS_BLOB = 3; 126 private static final int VERSION_ADD_EXTERNAL = 4; 127 private static final int VERSION_ADD_RECENT_KEY = 5; 128 129 public DatabaseHelper(Context context) { 130 super(context, DB_NAME, null, VERSION_ADD_RECENT_KEY); 131 } 132 133 @Override 134 public void onCreate(SQLiteDatabase db) { 135 136 db.execSQL("CREATE TABLE " + TABLE_RECENT + " (" + 137 RecentColumns.KEY + " TEXT PRIMARY KEY ON CONFLICT REPLACE," + 138 RecentColumns.STACK + " BLOB DEFAULT NULL," + 139 RecentColumns.TIMESTAMP + " INTEGER" + 140 ")"); 141 142 db.execSQL("CREATE TABLE " + TABLE_STATE + " (" + 143 StateColumns.AUTHORITY + " TEXT," + 144 StateColumns.ROOT_ID + " TEXT," + 145 StateColumns.DOCUMENT_ID + " TEXT," + 146 StateColumns.MODE + " INTEGER," + 147 StateColumns.SORT_ORDER + " INTEGER," + 148 "PRIMARY KEY (" + StateColumns.AUTHORITY + ", " + StateColumns.ROOT_ID + ", " 149 + StateColumns.DOCUMENT_ID + ")" + 150 ")"); 151 152 db.execSQL("CREATE TABLE " + TABLE_RESUME + " (" + 153 ResumeColumns.PACKAGE_NAME + " TEXT NOT NULL PRIMARY KEY," + 154 ResumeColumns.STACK + " BLOB DEFAULT NULL," + 155 ResumeColumns.TIMESTAMP + " INTEGER," + 156 ResumeColumns.EXTERNAL + " INTEGER NOT NULL DEFAULT 0" + 157 ")"); 158 } 159 160 @Override 161 public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 162 Log.w(TAG, "Upgrading database; wiping app data"); 163 db.execSQL("DROP TABLE IF EXISTS " + TABLE_RECENT); 164 db.execSQL("DROP TABLE IF EXISTS " + TABLE_STATE); 165 db.execSQL("DROP TABLE IF EXISTS " + TABLE_RESUME); 166 onCreate(db); 167 } 168 } 169 170 @Override 171 public boolean onCreate() { 172 mHelper = new DatabaseHelper(getContext()); 173 return true; 174 } 175 176 @Override 177 public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, 178 String sortOrder) { 179 final SQLiteDatabase db = mHelper.getReadableDatabase(); 180 switch (sMatcher.match(uri)) { 181 case URI_RECENT: 182 final long cutoff = System.currentTimeMillis() - MAX_HISTORY_IN_MILLIS; 183 return db.query(TABLE_RECENT, projection, RecentColumns.TIMESTAMP + ">" + cutoff, 184 null, null, null, sortOrder); 185 case URI_STATE: 186 final String authority = uri.getPathSegments().get(1); 187 final String rootId = uri.getPathSegments().get(2); 188 final String documentId = uri.getPathSegments().get(3); 189 return db.query(TABLE_STATE, projection, StateColumns.AUTHORITY + "=? AND " 190 + StateColumns.ROOT_ID + "=? AND " + StateColumns.DOCUMENT_ID + "=?", 191 new String[] { authority, rootId, documentId }, null, null, sortOrder); 192 case URI_RESUME: 193 final String packageName = uri.getPathSegments().get(1); 194 return db.query(TABLE_RESUME, projection, ResumeColumns.PACKAGE_NAME + "=?", 195 new String[] { packageName }, null, null, sortOrder); 196 default: 197 throw new UnsupportedOperationException("Unsupported Uri " + uri); 198 } 199 } 200 201 @Override 202 public String getType(Uri uri) { 203 return null; 204 } 205 206 @Override 207 public Uri insert(Uri uri, ContentValues values) { 208 final SQLiteDatabase db = mHelper.getWritableDatabase(); 209 final ContentValues key = new ContentValues(); 210 switch (sMatcher.match(uri)) { 211 case URI_RECENT: 212 values.put(RecentColumns.TIMESTAMP, System.currentTimeMillis()); 213 db.insert(TABLE_RECENT, null, values); 214 final long cutoff = System.currentTimeMillis() - MAX_HISTORY_IN_MILLIS; 215 db.delete(TABLE_RECENT, RecentColumns.TIMESTAMP + "<" + cutoff, null); 216 return uri; 217 case URI_STATE: 218 final String authority = uri.getPathSegments().get(1); 219 final String rootId = uri.getPathSegments().get(2); 220 final String documentId = uri.getPathSegments().get(3); 221 222 key.put(StateColumns.AUTHORITY, authority); 223 key.put(StateColumns.ROOT_ID, rootId); 224 key.put(StateColumns.DOCUMENT_ID, documentId); 225 226 // Ensure that row exists, then update with changed values 227 db.insertWithOnConflict(TABLE_STATE, null, key, SQLiteDatabase.CONFLICT_IGNORE); 228 db.update(TABLE_STATE, values, StateColumns.AUTHORITY + "=? AND " 229 + StateColumns.ROOT_ID + "=? AND " + StateColumns.DOCUMENT_ID + "=?", 230 new String[] { authority, rootId, documentId }); 231 232 return uri; 233 case URI_RESUME: 234 values.put(ResumeColumns.TIMESTAMP, System.currentTimeMillis()); 235 236 final String packageName = uri.getPathSegments().get(1); 237 key.put(ResumeColumns.PACKAGE_NAME, packageName); 238 239 // Ensure that row exists, then update with changed values 240 db.insertWithOnConflict(TABLE_RESUME, null, key, SQLiteDatabase.CONFLICT_IGNORE); 241 db.update(TABLE_RESUME, values, ResumeColumns.PACKAGE_NAME + "=?", 242 new String[] { packageName }); 243 return uri; 244 default: 245 throw new UnsupportedOperationException("Unsupported Uri " + uri); 246 } 247 } 248 249 @Override 250 public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { 251 throw new UnsupportedOperationException("Unsupported Uri " + uri); 252 } 253 254 @Override 255 public int delete(Uri uri, String selection, String[] selectionArgs) { 256 throw new UnsupportedOperationException("Unsupported Uri " + uri); 257 } 258 259 @Override 260 public Bundle call(String method, String arg, Bundle extras) { 261 if (METHOD_PURGE.equals(method)) { 262 // Purge references to unknown authorities 263 final Intent intent = new Intent(DocumentsContract.PROVIDER_INTERFACE); 264 final Set<String> knownAuth = Sets.newHashSet(); 265 for (ResolveInfo info : getContext() 266 .getPackageManager().queryIntentContentProviders(intent, 0)) { 267 knownAuth.add(info.providerInfo.authority); 268 } 269 270 purgeByAuthority(new Predicate<String>() { 271 @Override 272 public boolean apply(String authority) { 273 // Purge unknown authorities 274 return !knownAuth.contains(authority); 275 } 276 }); 277 278 return null; 279 280 } else if (METHOD_PURGE_PACKAGE.equals(method)) { 281 // Purge references to authorities in given package 282 final Intent intent = new Intent(DocumentsContract.PROVIDER_INTERFACE); 283 intent.setPackage(arg); 284 final Set<String> packageAuth = Sets.newHashSet(); 285 for (ResolveInfo info : getContext() 286 .getPackageManager().queryIntentContentProviders(intent, 0)) { 287 packageAuth.add(info.providerInfo.authority); 288 } 289 290 if (!packageAuth.isEmpty()) { 291 purgeByAuthority(new Predicate<String>() { 292 @Override 293 public boolean apply(String authority) { 294 // Purge authority matches 295 return packageAuth.contains(authority); 296 } 297 }); 298 } 299 300 return null; 301 302 } else { 303 return super.call(method, arg, extras); 304 } 305 } 306 307 /** 308 * Purge all internal data whose authority matches the given 309 * {@link Predicate}. 310 */ 311 private void purgeByAuthority(Predicate<String> predicate) { 312 final SQLiteDatabase db = mHelper.getWritableDatabase(); 313 final DocumentStack stack = new DocumentStack(); 314 315 Cursor cursor = db.query(TABLE_RECENT, null, null, null, null, null, null); 316 try { 317 while (cursor.moveToNext()) { 318 try { 319 final byte[] rawStack = cursor.getBlob( 320 cursor.getColumnIndex(RecentColumns.STACK)); 321 DurableUtils.readFromArray(rawStack, stack); 322 323 if (stack.root != null && predicate.apply(stack.root.authority)) { 324 final String key = getCursorString(cursor, RecentColumns.KEY); 325 db.delete(TABLE_RECENT, RecentColumns.KEY + "=?", new String[] { key }); 326 } 327 } catch (IOException ignored) { 328 } 329 } 330 } finally { 331 IoUtils.closeQuietly(cursor); 332 } 333 334 cursor = db.query(TABLE_STATE, new String[] { 335 StateColumns.AUTHORITY }, null, null, StateColumns.AUTHORITY, null, null); 336 try { 337 while (cursor.moveToNext()) { 338 final String authority = getCursorString(cursor, StateColumns.AUTHORITY); 339 if (predicate.apply(authority)) { 340 db.delete(TABLE_STATE, StateColumns.AUTHORITY + "=?", new String[] { 341 authority }); 342 if (DEBUG) Log.d(TAG, "Purged state for " + authority); 343 } 344 } 345 } finally { 346 IoUtils.closeQuietly(cursor); 347 } 348 349 cursor = db.query(TABLE_RESUME, null, null, null, null, null, null); 350 try { 351 while (cursor.moveToNext()) { 352 try { 353 final byte[] rawStack = cursor.getBlob( 354 cursor.getColumnIndex(ResumeColumns.STACK)); 355 DurableUtils.readFromArray(rawStack, stack); 356 357 if (stack.root != null && predicate.apply(stack.root.authority)) { 358 final String packageName = getCursorString( 359 cursor, ResumeColumns.PACKAGE_NAME); 360 db.delete(TABLE_RESUME, ResumeColumns.PACKAGE_NAME + "=?", 361 new String[] { packageName }); 362 } 363 } catch (IOException ignored) { 364 } 365 } 366 } finally { 367 IoUtils.closeQuietly(cursor); 368 } 369 } 370 } 371
