1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
* Copyright (C) 2003 Robert Kooima
*
* NEVERBALL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2 of the License,
* or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <SDL.h>
#include <string.h>
#include "common.h"
#include "text.h"
/*---------------------------------------------------------------------------*/
int text_add_char(Uint32 unicode, char *string, int maxbytes)
{
size_t pos = strlen(string);
int l;
if (unicode < 0x80) l = 1;
else if (unicode < 0x0800) l = 2;
else if (unicode < 0x10000) l = 3;
else l = 4;
if (pos + l >= maxbytes)
return 0;
if (unicode < 0x80)
string[pos++] = (char) unicode;
else if (unicode < 0x0800)
{
string[pos++] = (char) ((unicode >> 6) | 0xC0);
string[pos++] = (char) ((unicode & 0x3F) | 0x80);
}
else if (unicode < 0x10000)
{
string[pos++] = (char) ((unicode >> 12) | 0xE0);
string[pos++] = (char) (((unicode >> 6) & 0x3F) | 0x80);
string[pos++] = (char) ((unicode & 0x3F) | 0x80);
}
else
{
string[pos++] = (char) ((unicode >> 18) | 0xF0);
string[pos++] = (char) (((unicode >> 12) & 0x3F) | 0x80);
string[pos++] = (char) (((unicode >> 6) & 0x3F) | 0x80);
string[pos++] = (char) ((unicode & 0x3F) | 0x80);
}
string[pos++] = 0;
return l;
}
int text_del_char(char *string)
{
int pos = (int) strlen(string) - 1;
while (pos >= 0 && ((string[pos] & 0xC0) == 0x80))
string[pos--] = 0;
if (pos >= 0)
{
string[pos] = 0;
return 1;
}
return 0;
}
int text_length(const char *string)
{
int result = 0;
while (*string != '\0')
if ((*string++ & 0xC0) != 0x80)
result++;
return result;
}
/*---------------------------------------------------------------------------*/
char text_input[MAXSTR];
static void (*on_text_input)(int);
#define CALLBACK(typing) do { \
if (on_text_input) \
on_text_input(typing); \
} while (0)
void text_input_start(void (*cb)(int))
{
on_text_input = cb;
text_input[0] = 0;
CALLBACK(0);
SDL_StartTextInput();
}
void text_input_stop(void)
{
on_text_input = NULL;
SDL_StopTextInput();
}
int text_input_str(const char *input, int typing)
{
if (input && *input)
{
SAFECAT(text_input, input);
CALLBACK(typing);
return 1;
}
return 0;
}
int text_input_char(int input)
{
if (text_add_char(input, text_input, sizeof (text_input)))
{
CALLBACK(0);
return 1;
}
return 0;
}
int text_input_del(void)
{
if (text_del_char(text_input))
{
CALLBACK(0);
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
|
