1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.layoutlib.bridge.util;
18
19import java.io.File;
20import java.io.FileInputStream;
21import java.io.FileNotFoundException;
22
23/**
24 * Simpler wrapper around FileInputStream. This is used when the input stream represent
25 * not a normal bitmap but a nine patch.
26 * This is useful when the InputStream is created in a method but used in another that needs
27 * to know whether this is 9-patch or not, such as BitmapFactory.
28 */
29public class NinePatchInputStream extends FileInputStream {
30    private boolean mFakeMarkSupport = true;
31    public NinePatchInputStream(File file) throws FileNotFoundException {
32        super(file);
33    }
34
35    @Override
36    public boolean markSupported() {
37        if (mFakeMarkSupport) {
38            // this is needed so that BitmapFactory doesn't wrap this in a BufferedInputStream.
39            return true;
40        }
41
42        return super.markSupported();
43    }
44
45    public void disableFakeMarkSupport() {
46        // disable fake mark support so that in case codec actually try to use them
47        // we don't lie to them.
48        mFakeMarkSupport = false;
49    }
50}
51