1 /**
2  * Copyright (c) 2018, Timothy Stack
3  *
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are met:
8  *
9  * * Redistributions of source code must retain the above copyright notice, this
10  * list of conditions and the following disclaimer.
11  * * 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  * * Neither the name of Timothy Stack nor the names of its contributors
15  * may be used to endorse or promote products derived from this software
16  * without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
19  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
25  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  *
29  * @file input_dispatcher.hh
30  */
31 
32 #ifndef INPUT_DISPATCHER_HH
33 #define INPUT_DISPATCHER_HH
34 
35 #include <sys/types.h>
36 
37 #include <functional>
38 
39 #define KEY_ESCAPE    0x1b
40 #define KEY_CTRL_RBRACKET 0x1d
41 
42 class input_dispatcher {
43 public:
44     void new_input(const struct timeval &current_time, int ch);
45 
46     void poll(const struct timeval &current_time);
47 
in_escape() const48     bool in_escape() const {
49         return this->id_escape_index > 0;
50     }
51 
52     enum class escape_match_t {
53         NONE,
54         PARTIAL,
55         FULL,
56     };
57 
58     std::function<escape_match_t(const char *)> id_escape_matcher;
59     std::function<bool(int)> id_key_handler;
60     std::function<void(const char *)> id_escape_handler;
61     std::function<void()> id_mouse_handler;
62     std::function<void(const char *)> id_unhandled_handler;
63 private:
64     void reset_escape_buffer(int ch,
65                              const struct timeval &current_time,
66                              ssize_t expected_size = -1);
67     void append_to_escape_buffer(int ch);
68 
69     char id_escape_buffer[32];
70     ssize_t id_escape_index{0};
71     ssize_t id_escape_expected_size{-1};
72     struct timeval id_escape_start_time{0, 0};
73 };
74 
75 #endif
76