1 files changed, 90 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/ui/CacheStorageUsageInfo.java b/src/com/android/gallery3d/ui/CacheStorageUsageInfo.java
new file mode 100644
index 000000000..46f7a2433
--- /dev/null
+++ b/src/com/android/gallery3d/ui/CacheStorageUsageInfo.java
@@ -0,0 +1,90 @@
+/*
+ * 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;
+    }
+}