1 files changed, 191 insertions, 0 deletions
diff --git a/WordPress/src/main/java/org/wordpress/android/ui/media/MediaGalleryEditFragment.java b/WordPress/src/main/java/org/wordpress/android/ui/media/MediaGalleryEditFragment.java
new file mode 100644
index 000000000..e99418720
--- /dev/null
+++ b/WordPress/src/main/java/org/wordpress/android/ui/media/MediaGalleryEditFragment.java
@@ -0,0 +1,191 @@
+package org.wordpress.android.ui.media;
+
+import android.app.Fragment;
+import android.database.Cursor;
+import android.database.CursorWrapper;
+import android.os.Bundle;
+import android.util.SparseIntArray;
+import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
+import android.view.LayoutInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+
+import com.mobeta.android.dslv.DragSortListView;
+import com.mobeta.android.dslv.DragSortListView.DropListener;
+import com.mobeta.android.dslv.DragSortListView.RemoveListener;
+
+import org.wordpress.android.R;
+import org.wordpress.android.WordPress;
+
+import java.util.ArrayList;
+import java.util.Collections;
+
+/**
+ * Fragment where containing a drag-sort listview where the user can drag items
+ * to change their position in a media gallery
+ */
+public class MediaGalleryEditFragment extends Fragment implements DropListener, RemoveListener {
+    private static final String SAVED_MEDIA_IDS = "SAVED_MEDIA_IDS";
+    private MediaGalleryAdapter mGridAdapter;
+    private ArrayList<String> mIds;
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        super.onCreateView(inflater, container, savedInstanceState);
+
+        mIds = new ArrayList<String>();
+        if (savedInstanceState != null) {
+            mIds = savedInstanceState.getStringArrayList(SAVED_MEDIA_IDS);
+        }
+
+        mGridAdapter = new MediaGalleryAdapter(getActivity(), R.layout.media_gallery_item, null, true,
+                MediaImageLoader.getInstance());
+
+        View view = inflater.inflate(R.layout.media_gallery_edit_fragment, container, false);
+
+        DragSortListView gridView = (DragSortListView) view.findViewById(R.id.edit_media_gallery_gridview);
+        gridView.setAdapter(mGridAdapter);
+        gridView.setOnCreateContextMenuListener(this);
+        gridView.setDropListener(this);
+        gridView.setRemoveListener(this);
+        refreshGridView();
+
+        return view;
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putStringArrayList(SAVED_MEDIA_IDS, mIds);
+    }
+
+    private void refreshGridView() {
+        if (WordPress.getCurrentBlog() == null) {
+            return;
+        }
+
+        String blogId = String.valueOf(WordPress.getCurrentBlog().getLocalTableBlogId());
+        Cursor cursor = WordPress.wpDB.getMediaFiles(blogId, mIds);
+        if (cursor == null) {
+            mGridAdapter.changeCursor(null);
+            return;
+        }
+        SparseIntArray positions = mapIdsToCursorPositions(cursor);
+        mGridAdapter.swapCursor(new OrderedCursor(cursor, positions));
+    }
+
+    private SparseIntArray mapIdsToCursorPositions(Cursor cursor) {
+        SparseIntArray positions = new SparseIntArray();
+        int size = mIds.size();
+        for (int i = 0; i < size; i++) {
+            while (cursor.moveToNext()) {
+                String mediaId = cursor.getString(cursor.getColumnIndex("mediaId"));
+                if (mediaId.equals(mIds.get(i))) {
+                    positions.put(i, cursor.getPosition());
+                    cursor.moveToPosition(-1);
+                    break;
+                }
+            }
+        }
+        return positions;
+    }
+
+    public void setMediaIds(ArrayList<String> ids) {
+        mIds = ids;
+        refreshGridView();
+    }
+
+    public ArrayList<String> getMediaIds() {
+        return mIds;
+    }
+
+    public void reverseIds() {
+        Collections.reverse(mIds);
+        refreshGridView();
+    }
+
+    private class OrderedCursor extends CursorWrapper {
+        final int mPos;
+        private final int mCount;
+
+        // a map of custom position to cursor position
+        private final SparseIntArray mPositions;
+
+        /**
+         * A wrapper to allow for a custom order of items in a cursor *
+         */
+        public OrderedCursor(Cursor cursor, SparseIntArray positions) {
+            super(cursor);
+            cursor.moveToPosition(-1);
+            mPos = 0;
+            mCount = cursor.getCount();
+            mPositions = positions;
+        }
+
+        @Override
+        public boolean move(int offset) {
+            return this.moveToPosition(this.mPos + offset);
+        }
+
+        @Override
+        public boolean moveToNext() {
+            return this.moveToPosition(this.mPos + 1);
+        }
+
+        @Override
+        public boolean moveToPrevious() {
+            return this.moveToPosition(this.mPos - 1);
+        }
+
+        @Override
+        public boolean moveToFirst() {
+            return this.moveToPosition(0);
+        }
+
+        @Override
+        public boolean moveToLast() {
+            return this.moveToPosition(this.mCount - 1);
+        }
+
+        @Override
+        public boolean moveToPosition(int position) {
+            return super.moveToPosition(mPositions.get(position));
+        }
+    }
+
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
+        AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) menuInfo;
+        Cursor cursor = mGridAdapter.getCursor();
+        if (cursor == null) {
+            return;
+        }
+        cursor.moveToPosition(info.position);
+        String mediaId = cursor.getString(cursor.getColumnIndex("mediaId"));
+
+        menu.add(ContextMenu.NONE, mIds.indexOf(mediaId), ContextMenu.NONE, R.string.delete);
+    }
+
+    @Override
+    public boolean onContextItemSelected(MenuItem item) {
+        int index = item.getItemId();
+        mIds.remove(index);
+        refreshGridView();
+        return true;
+    }
+
+    @Override
+    public void drop(int from, int to) {
+        String id = mIds.get(from);
+        mIds.remove(id);
+        mIds.add(to, id);
+        refreshGridView();
+    }
+
+    @Override
+    public void remove(int position) {
+    }
+}