| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.gallery3d.ui; |
| |
| import android.content.Context; |
| import android.os.StatFs; |
| |
| import com.android.gallery3d.app.AbstractGalleryActivity; |
| import com.android.gallery3d.util.ThreadPool.JobContext; |
| |
| import java.io.File; |
| |
| public class CacheStorageUsageInfo { |
| @SuppressWarnings("unused") |
| private static final String TAG = "CacheStorageUsageInfo"; |
| |
| // number of bytes the storage has. |
| private long mTotalBytes; |
| |
| // number of bytes already used. |
| private long mUsedBytes; |
| |
| // number of bytes used for the cache (should be less then usedBytes). |
| private long mUsedCacheBytes; |
| |
| // number of bytes used for the cache if all pending downloads (and removals) are completed. |
| private long mTargetCacheBytes; |
| |
| private AbstractGalleryActivity mActivity; |
| private Context mContext; |
| private long mUserChangeDelta; |
| |
| public CacheStorageUsageInfo(AbstractGalleryActivity activity) { |
| mActivity = activity; |
| mContext = activity.getAndroidContext(); |
| } |
| |
| public void increaseTargetCacheSize(long delta) { |
| mUserChangeDelta += delta; |
| } |
| |
| public void loadStorageInfo(JobContext jc) { |
| File cacheDir = mContext.getExternalCacheDir(); |
| if (cacheDir == null) { |
| cacheDir = mContext.getCacheDir(); |
| } |
| |
| String path = cacheDir.getAbsolutePath(); |
| StatFs stat = new StatFs(path); |
| long blockSize = stat.getBlockSize(); |
| long availableBlocks = stat.getAvailableBlocks(); |
| long totalBlocks = stat.getBlockCount(); |
| |
| mTotalBytes = blockSize * totalBlocks; |
| mUsedBytes = blockSize * (totalBlocks - availableBlocks); |
| mUsedCacheBytes = mActivity.getDataManager().getTotalUsedCacheSize(); |
| mTargetCacheBytes = mActivity.getDataManager().getTotalTargetCacheSize(); |
| } |
| |
| public long getTotalBytes() { |
| return mTotalBytes; |
| } |
| |
| public long getExpectedUsedBytes() { |
| return mUsedBytes - mUsedCacheBytes + mTargetCacheBytes + mUserChangeDelta; |
| } |
| |
| public long getUsedBytes() { |
| // Should it be usedBytes - usedCacheBytes + targetCacheBytes ? |
| return mUsedBytes; |
| } |
| |
| public long getFreeBytes() { |
| return mTotalBytes - mUsedBytes; |
| } |
| } |