Add rotate support in Film Strip

Move the exif related code under src.com.android.camera.exif.
Refactor the member variables under LocalMediaData.java.
Refactor the LocalData to make sure they are immutables for thread safety.

bug:10367037
Change-Id: I0e84bcc0097925b2be749fe016984177a68e0a4d

1 files changed, 28 insertions, 2 deletions

diff --git a/src/com/android/camera/data/LocalData.java b/src/com/android/camera/data/LocalData.java
index 11d36da82..45bcb9ffa 100644
--- a/src/com/android/camera/data/LocalData.java
+++ b/src/com/android/camera/data/LocalData.java
@@ -29,10 +29,15 @@ import java.util.Comparator;
 /**
  * An abstract interface that represents the local media data. Also implements
  * Comparable interface so we can sort in DataAdapter.
+ * Note that all the sub-class of LocalData are designed to be immutable, i.e:
+ * all the members need to be final, and there is no setter. In this way, we
+ * can guarantee thread safety for LocalData.
  */
 public interface LocalData extends FilmStripView.ImageData {
     static final String TAG = "CAM_LocalData";
 
+    public static final String MIME_TYPE_JPEG = "image/jpeg";
+
     public static final int ACTION_NONE = 0;
     public static final int ACTION_PLAY = 1;
     public static final int ACTION_DELETE = (1 << 1);
@@ -97,6 +102,17 @@ public interface LocalData extends FilmStripView.ImageData {
     /** Removes the data from the storage if possible. */
     boolean delete(Context c);
 
+    /**
+     * Rotate the image in 90 degrees. This is a no-op for non-image.
+     *
+     * @param context Used to update the content provider when rotation is done.
+     * @param adapter Used to update the view.
+     * @param currentDataId Used to update the view.
+     * @param clockwise True if the rotation goes clockwise.
+     */
+    void rotate90Degrees(Context context, LocalDataAdapter adapter,
+            int currentDataId, boolean clockwise);
+
     void onFullScreen(boolean fullScreen);
 
     /** Returns {@code true} if it allows swipe to filmstrip in full screen. */
@@ -137,12 +153,17 @@ public interface LocalData extends FilmStripView.ImageData {
     int getLocalDataType();
 
     /**
+     * @return The size of the data in bytes
+     */
+    long getSizeInBytes();
+
+    /**
      * Refresh the data content.
      *
      * @param resolver {@link ContentResolver} to refresh the data.
-     * @return {@code true} if success, {@code false} otherwise.
+     * @return A new LocalData object if success, null otherwise.
      */
-    boolean refresh(ContentResolver resolver);
+    LocalData refresh(ContentResolver resolver);
 
     static class NewestFirstComparator implements Comparator<LocalData> {
 
@@ -170,5 +191,10 @@ public interface LocalData extends FilmStripView.ImageData {
             return cmp;
         }
     }
+
+    /**
+     * @return the Id of the data.
+     */
+    long getId();
 }