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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/LogStream.h>
30#include <LibGUI/TextPosition.h>
31
32namespace GUI {
33
34class TextRange {
35public:
36 TextRange() {}
37 TextRange(const TextPosition& start, const TextPosition& end)
38 : m_start(start)
39 , m_end(end)
40 {
41 }
42
43 bool is_valid() const { return m_start.is_valid() && m_end.is_valid(); }
44 void clear()
45 {
46 m_start = {};
47 m_end = {};
48 }
49
50 TextPosition& start() { return m_start; }
51 TextPosition& end() { return m_end; }
52 const TextPosition& start() const { return m_start; }
53 const TextPosition& end() const { return m_end; }
54
55 TextRange normalized() const { return TextRange(normalized_start(), normalized_end()); }
56
57 void set_start(const TextPosition& position) { m_start = position; }
58 void set_end(const TextPosition& position) { m_end = position; }
59
60 void set(const TextPosition& start, const TextPosition& end)
61 {
62 m_start = start;
63 m_end = end;
64 }
65
66 bool operator==(const TextRange& other) const
67 {
68 return m_start == other.m_start && m_end == other.m_end;
69 }
70
71 bool contains(const TextPosition& position) const
72 {
73 if (!(position.line() > m_start.line() || (position.line() == m_start.line() && position.column() >= m_start.column())))
74 return false;
75 if (!(position.line() < m_end.line() || (position.line() == m_end.line() && position.column() <= m_end.column())))
76 return false;
77 return true;
78 }
79
80private:
81 TextPosition normalized_start() const { return m_start < m_end ? m_start : m_end; }
82 TextPosition normalized_end() const { return m_start < m_end ? m_end : m_start; }
83
84 TextPosition m_start;
85 TextPosition m_end;
86};
87
88inline const LogStream& operator<<(const LogStream& stream, const TextRange& value)
89{
90 if (!value.is_valid())
91 return stream << "GUI::TextRange(Invalid)";
92 return stream << value.start() << '-' << value.end();
93}
94
95}