Owen Lin | 5f01ca6 | 2011-09-09 13:33:44 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 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.gallery3d.ui; |
| 18 | |
Owen Lin | 5f01ca6 | 2011-09-09 13:33:44 +0800 | [diff] [blame] | 19 | import android.content.Context; |
| 20 | import android.os.StatFs; |
| 21 | |
Owen Lin | 73a04ff | 2012-03-14 17:27:24 +0800 | [diff] [blame] | 22 | import com.android.gallery3d.app.GalleryActivity; |
| 23 | import com.android.gallery3d.util.ThreadPool.JobContext; |
| 24 | |
Owen Lin | 5f01ca6 | 2011-09-09 13:33:44 +0800 | [diff] [blame] | 25 | import java.io.File; |
| 26 | |
| 27 | public class CacheStorageUsageInfo { |
| 28 | private static final String TAG = "CacheStorageUsageInfo"; |
| 29 | |
| 30 | // number of bytes the storage has. |
| 31 | private long mTotalBytes; |
| 32 | |
| 33 | // number of bytes already used. |
| 34 | private long mUsedBytes; |
| 35 | |
| 36 | // number of bytes used for the cache (should be less then usedBytes). |
| 37 | private long mUsedCacheBytes; |
| 38 | |
| 39 | // number of bytes used for the cache if all pending downloads (and removals) are completed. |
| 40 | private long mTargetCacheBytes; |
| 41 | |
| 42 | private GalleryActivity mActivity; |
| 43 | private Context mContext; |
| 44 | private long mUserChangeDelta; |
| 45 | |
| 46 | public CacheStorageUsageInfo(GalleryActivity activity) { |
| 47 | mActivity = activity; |
| 48 | mContext = activity.getAndroidContext(); |
| 49 | } |
| 50 | |
| 51 | public void increaseTargetCacheSize(long delta) { |
| 52 | mUserChangeDelta += delta; |
| 53 | } |
| 54 | |
| 55 | public void loadStorageInfo(JobContext jc) { |
| 56 | File cacheDir = mContext.getExternalCacheDir(); |
| 57 | if (cacheDir == null) { |
| 58 | cacheDir = mContext.getCacheDir(); |
| 59 | } |
| 60 | |
| 61 | String path = cacheDir.getAbsolutePath(); |
| 62 | StatFs stat = new StatFs(path); |
| 63 | long blockSize = stat.getBlockSize(); |
| 64 | long availableBlocks = stat.getAvailableBlocks(); |
| 65 | long totalBlocks = stat.getBlockCount(); |
| 66 | |
| 67 | mTotalBytes = blockSize * totalBlocks; |
| 68 | mUsedBytes = blockSize * (totalBlocks - availableBlocks); |
| 69 | mUsedCacheBytes = mActivity.getDataManager().getTotalUsedCacheSize(); |
| 70 | mTargetCacheBytes = mActivity.getDataManager().getTotalTargetCacheSize(); |
| 71 | } |
| 72 | |
| 73 | public long getTotalBytes() { |
| 74 | return mTotalBytes; |
| 75 | } |
| 76 | |
| 77 | public long getExpectedUsedBytes() { |
| 78 | return mUsedBytes - mUsedCacheBytes + mTargetCacheBytes + mUserChangeDelta; |
| 79 | } |
| 80 | |
| 81 | public long getUsedBytes() { |
| 82 | // Should it be usedBytes - usedCacheBytes + targetCacheBytes ? |
| 83 | return mUsedBytes; |
| 84 | } |
| 85 | |
| 86 | public long getFreeBytes() { |
| 87 | return mTotalBytes - mUsedBytes; |
| 88 | } |
| 89 | } |