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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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 met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include <AK/RefPtr.h>
30
31class LayoutNode;
32
33struct LayoutPosition {
34 bool operator>=(const LayoutPosition& other) const
35 {
36 if (layout_node == other.layout_node)
37 return index_in_node >= other.index_in_node;
38
39 // FIXME: Implement.
40 return true;
41 }
42
43 bool operator<=(const LayoutPosition& other) const
44 {
45 if (layout_node == other.layout_node)
46 return index_in_node <= other.index_in_node;
47
48 // FIXME: Implement.
49 return false;
50 }
51
52 RefPtr<LayoutNode> layout_node;
53 int index_in_node { 0 };
54};
55
56class LayoutRange {
57public:
58 LayoutRange() {}
59 LayoutRange(const LayoutPosition& start, const LayoutPosition& end)
60 : m_start(start)
61 , m_end(end)
62 {
63 }
64
65 bool is_valid() const { return m_start.layout_node && m_end.layout_node; }
66
67 void set(const LayoutPosition& start, const LayoutPosition& end)
68 {
69 m_start = start;
70 m_end = end;
71 }
72
73 void set_start(const LayoutPosition& start) { m_start = start; }
74 void set_end(const LayoutPosition& end) { m_end = end; }
75
76 const LayoutPosition& start() const { return m_start; }
77 const LayoutPosition& end() const { return m_end; }
78
79private:
80 LayoutPosition m_start;
81 LayoutPosition m_end;
82};