jcs.org
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#include <AK/JsonObject.h>
28#include <LibCore/File.h>
29#include <stdio.h>
30
31#include <Kernel/Syscall.h>
32#include <AK/Optional.h>
33#include <AK/StdLibExtras.h>
34#include <AK/kmalloc.h>
35#include <stdio.h>
36#include <string.h>
37#include <sys/stat.h>
38#include <unistd.h>
39
40char* read_map(const JsonObject& json, const String& name)
41{
42 if (!json.has(name))
43 return nullptr;
44
45 char* map = new char[0x80]();
46 auto map_arr = json.get(name).as_array();
47
48 for (int i = 0; i < map_arr.size(); i++) {
49 auto key_value = map_arr.at(i).as_string();
50 char character = 0;
51 if (key_value.length() == 0) {
52 ;
53 } else if (key_value.length() == 1) {
54 character = key_value.characters()[0];
55 } else if (key_value.length() == 4) {
56 // FIXME: Replace this workaround with "\u001B" in the keymap files
57 // after these kind of escape sequences are implemented in JsonParser.
58 if (key_value == "0x1B") {
59 character = 0x1B;
60 }
61 } else {
62 fprintf(stderr, "Unknown character in %s[%u] = %s.\n", name.characters(), i, key_value.characters());
63 ASSERT_NOT_REACHED();
64 }
65
66 map[i] = character;
67 }
68
69 return map;
70}
71
72RefPtr<Core::File> open_keymap_file(String& filename)
73{
74 auto file = Core::File::construct(filename);
75 if (file->open(Core::IODevice::ReadOnly))
76 return file;
77
78 if (!filename.ends_with(".json")) {
79 StringBuilder full_path;
80 full_path.append("/res/keymaps/");
81 full_path.append(filename);
82 full_path.append(".json");
83 filename = full_path.to_string();
84 file = Core::File::construct(filename);
85 if (file->open(Core::IODevice::ReadOnly))
86 return file;
87 }
88
89 return file;
90}
91
92int read_map_from_file(String& filename)
93{
94 auto file = open_keymap_file(filename);
95 if (!file->is_open()) {
96 fprintf(stderr, "Failed to open %s: %s\n", filename.characters(), file->error_string());
97 return 1;
98 }
99
100 auto file_contents = file->read_all();
101 auto json = JsonValue::from_string(file_contents).as_object();
102
103 char* map = read_map(json, "map");
104 char* shift_map = read_map(json, "shift_map");
105 char* alt_map = read_map(json, "alt_map");
106 char* altgr_map = read_map(json, "altgr_map");
107
108 if (!altgr_map) {
109 // AltGr map was not found, using Alt map as fallback.
110 altgr_map = alt_map;
111 }
112
113 Syscall::SC_setkeymap_params params { map, shift_map, alt_map, altgr_map };
114 return syscall(SC_setkeymap, ¶ms);
115}
116
117int main(int argc, char** argv)
118{
119 if (argc != 2) {
120 fprintf(stderr, "usage: keymap <name|file>\n");
121 return 0;
122 }
123
124 String filename = argv[1];
125 int ret_val = read_map_from_file(filename);
126
127 if (ret_val == -EPERM)
128 fprintf(stderr, "Permission denied.\n");
129
130 if (ret_val == 0)
131 fprintf(stderr, "New keymap loaded from \"%s\".\n", filename.characters());
132
133 return ret_val;
134}