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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/BinarySearch.h>
30#include <AK/FileSystemPath.h>
31#include <AK/QuickSort.h>
32#include <AK/String.h>
33#include <AK/Vector.h>
34#include <LibCore/DirIterator.h>
35#include <sys/stat.h>
36
37class LineEditor {
38public:
39 LineEditor();
40 ~LineEditor();
41
42 String get_line(const String& prompt);
43
44 void add_to_history(const String&);
45 const Vector<String>& history() const { return m_history; }
46
47 void cache_path();
48
49private:
50 void clear_line();
51 void insert(const String&);
52 void insert(const char);
53 void cut_mismatching_chars(String& completion, const String& other, size_t start_compare);
54 Vector<String> tab_complete_first_token(const String&);
55 Vector<String> tab_complete_other_token(String&);
56 void vt_save_cursor();
57 void vt_restore_cursor();
58 void vt_clear_to_end_of_line();
59
60 Vector<char, 1024> m_buffer;
61 size_t m_cursor { 0 };
62 size_t m_times_tab_pressed { 0 };
63 size_t m_num_columns { 0 };
64
65 // FIXME: This should be something more take_first()-friendly.
66 Vector<String> m_history;
67 size_t m_history_cursor { 0 };
68 size_t m_history_capacity { 100 };
69
70 Vector<String, 256> m_path;
71
72 enum class InputState {
73 Free,
74 ExpectBracket,
75 ExpectFinal,
76 ExpectTerminator,
77 };
78 InputState m_state { InputState::Free };
79};