1 files changed, 89 insertions, 0 deletions
diff --git a/src/org/cyanogenmod/themes/provider/util/PreviewUtils.java b/src/org/cyanogenmod/themes/provider/util/PreviewUtils.java
new file mode 100644
index 0000000..de86092
--- /dev/null
+++ b/src/org/cyanogenmod/themes/provider/util/PreviewUtils.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2015 The CyanogenMod 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 org.cyanogenmod.themes.provider.util;
+
+import android.graphics.Bitmap;
+import android.os.FileUtils;
+import android.util.Log;
+
+import java.io.File;
+import java.io.FileOutputStream;
+
+public class PreviewUtils {
+    private static final String TAG = PreviewUtils.class.getSimpleName();
+
+    public static final String PREVIEWS_DIR = "previews";
+
+    public static boolean dirExists(String dirPath) {
+        final File dir = new File(dirPath);
+        return dir.exists() && dir.isDirectory();
+    }
+
+    public static void createDirIfNotExists(String dirPath) {
+        if (!dirExists(dirPath)) {
+            File dir = new File(dirPath);
+            if (dir.mkdir()) {
+                FileUtils.setPermissions(dir, FileUtils.S_IRWXU |
+                        FileUtils.S_IRWXG | FileUtils.S_IROTH | FileUtils.S_IXOTH, -1, -1);
+            }
+        }
+    }
+
+    public static String getPreviewsDir(String baseDir) {
+        return baseDir + File.separator + PREVIEWS_DIR;
+    }
+
+    private static String saveCompressedImage(byte[] image, String baseDir, String pkgName,
+            String fileName) {
+        if (image == null) return null;
+        // Create relevant directories
+        String previewsDir = PreviewUtils.getPreviewsDir(baseDir);
+        String pkgDir = previewsDir + File.separator + pkgName;
+        String filePath = pkgDir + File.separator + fileName;
+        PreviewUtils.createDirIfNotExists(previewsDir);
+        PreviewUtils.createDirIfNotExists(pkgDir);
+
+        // Save blob
+        FileOutputStream outputStream;
+        final File pkgPreviewDir = new File(pkgDir);
+        try {
+            File outFile = new File(pkgPreviewDir, fileName);
+            outputStream = new FileOutputStream(outFile);
+            outputStream.write(image);
+            outputStream.close();
+            FileUtils.setPermissions(outFile,
+                    FileUtils.S_IRWXU | FileUtils.S_IRWXG | FileUtils.S_IROTH,
+                    -1, -1);
+        } catch (Exception e) {
+            Log.w(TAG, "Unable to save preview " + pkgName + File.separator + fileName, e);
+            filePath = null;
+        }
+
+        return filePath;
+    }
+
+    public static String compressAndSavePng(Bitmap bmp, String baseDir, String pkgName,
+            String fileName) {
+        byte[] image = BitmapUtils.getBitmapBlobPng(bmp);
+        return saveCompressedImage(image, baseDir, pkgName, fileName);
+    }
+
+    public static String compressAndSaveJpg(Bitmap bmp, String baseDir, String pkgName,
+            String fileName) {
+        byte[] image = BitmapUtils.getBitmapBlobJpg(bmp);
+        return saveCompressedImage(image, baseDir, pkgName, fileName);
+    }
+}