1/*
2 * Copyright 2014, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.smalidea.psi.impl;
33
34import org.jetbrains.annotations.Nullable;
35import org.jf.smalidea.psi.SmaliCompositeElementFactory;
36import org.jf.smalidea.psi.SmaliElementTypes;
37
38public class SmaliLabel extends SmaliCompositeElement {
39    public static final SmaliCompositeElementFactory FACTORY = new SmaliCompositeElementFactory() {
40        @Override public SmaliCompositeElement createElement() {
41            return new SmaliLabel();
42        }
43    };
44
45    public SmaliLabel() {
46        super(SmaliElementTypes.LABEL);
47    }
48
49    @Override public String getName() {
50        return getText().substring(1);
51    }
52
53    @Nullable
54    public SmaliInstruction getInstruction() {
55        return findNextSiblingByClass(SmaliInstruction.class);
56    }
57
58    @Nullable
59    private SmaliInstruction getPreviousInstruction() {
60        return findPrevSiblingByClass(SmaliInstruction.class);
61    }
62
63    public int getOffset() {
64        SmaliInstruction instruction = getInstruction();
65        if (instruction == null) {
66            instruction = getPreviousInstruction();
67            if (instruction == null) {
68                return 0;
69            }
70            // TODO: handle variable size instructions
71            return instruction.getOffset() + instruction.getOpcode().format.size;
72        }
73        return instruction.getOffset();
74    }
75}
76