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/*
* Copyright (C) 2015 Dominik Schürmann <dominik@dominikschuermann.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
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;
}
}
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