filter out unknown linked ids

1 files changed, 76 insertions, 0 deletions

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/FilterCursorWrapper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/FilterCursorWrapper.java
new file mode 100644
index 000000000..ab73f59b8
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/FilterCursorWrapper.java
@@ -0,0 +1,76 @@
+package org.sufficientlysecure.keychain.util;
+
+
+import android.database.Cursor;
+import android.database.CursorWrapper;
+
+public abstract class FilterCursorWrapper extends CursorWrapper {
+    private int[] mIndex;
+    private int mCount = 0;
+    private int mPos = 0;
+
+    public abstract boolean isVisible(Cursor cursor);
+
+    public FilterCursorWrapper(Cursor cursor) {
+        super(cursor);
+        mCount = super.getCount();
+        mIndex = new int[mCount];
+        for (int i = 0; i < mCount; i++) {
+            super.moveToPosition(i);
+            if (isVisible(cursor)) {
+                mIndex[mPos++] = i;
+            }
+        }
+        mCount = mPos;
+        mPos = 0;
+        super.moveToFirst();
+    }
+
+    @Override
+    public boolean move(int offset) {
+        return this.moveToPosition(mPos + offset);
+    }
+
+    @Override
+    public boolean moveToNext() {
+        return this.moveToPosition(mPos + 1);
+    }
+
+    @Override
+    public boolean moveToPrevious() {
+        return this.moveToPosition(mPos - 1);
+    }
+
+    @Override
+    public boolean moveToFirst() {
+        return this.moveToPosition(0);
+    }
+
+    @Override
+    public boolean moveToLast() {
+        return this.moveToPosition(mCount - 1);
+    }
+
+    @Override
+    public boolean moveToPosition(int position) {
+        if (position >= mCount || position < 0) {
+            return false;
+        }
+        return super.moveToPosition(mIndex[position]);
+    }
+
+    @Override
+    public int getCount() {
+        return mCount;
+    }
+
+    public int getHiddenCount() {
+        return super.getCount() - mCount;
+    }
+
+    @Override
+    public int getPosition() {
+        return mPos;
+    }
+
+}
\ No newline at end of file