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
|
//
// "$Id: Fl_compose.cxx,v 1.1.2.7 2001/03/14 17:20:01 spitzak Exp $"
//
// Character compose processing for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2001 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@fltk.org".
//
#include <FL/Fl.H>
static const char* const compose_pairs =
" ! % # $ y=| & : c a <<~ - r _ * +-2 3 ' u p . , 1 o >>141234? "
"`A'A^A~A:A*AAE,C`E'E^E:E`I'I^I:I-D~N`O'O^O~O:Ox O/`U'U^U:U'YTHss"
"`a'a^a~a:a*aae,c`e'e^e:e`i'i^i:i-d~n`o'o^o~o:o-:o/`u'u^u:u'yth:y";
#ifndef WIN32 // X only
// X dead-key lookup table. This turns a dead-key keysym into the
// first of two characters for one of the compose sequences. These
// keysyms start at 0xFE50.
// Win32 handles the dead keys before fltk can see them. This is
// unfortunate, because you don't get the preview effect.
static char dead_keys[] = {
'`', // XK_dead_grave
'\'', // XK_dead_acute
'^', // XK_dead_circumflex
'~', // XK_dead_tilde
'_', // XK_dead_macron
0, // XK_dead_breve
'.', // XK_dead_abovedot
':', // XK_dead_diaeresis
'*', // XK_dead_abovering
0, // XK_dead_doubleacute
'v', // XK_dead_caron
',' // XK_dead_cedilla
// 0, // XK_dead_ogonek
// 0, // XK_dead_iota
// 0, // XK_dead_voiced_sound
// 0, // XK_dead_semivoiced_sound
// 0 // XK_dead_belowdot
};
#endif
int Fl::compose_state;
int Fl::compose(int& del) {
del = 0;
char ascii = e_text[0];
// Alt+letters are reserved for shortcuts. But alt+foreign letters
// has to be allowed, because some key layouts require alt to be held
// down in order to type them...
if (e_state & (FL_ALT|FL_META) && !(ascii & 128)) return 0;
if (compose_state == 1) { // after the compose key
if (ascii == ' ') { // space turns into nbsp
e_text[0] = char(0xA0);
compose_state = 0;
return 1;
}
// see if it is either character of any pair:
for (const char *p = compose_pairs; *p; p += 2)
if (p[0] == ascii || p[1] == ascii) {
if (p[1] == ' ') e_text[0] = (p-compose_pairs)/2+0xA0;
compose_state = ascii;
return 1;
}
if (e_length) { // compose key also "quotes" control characters
compose_state = 0;
return 1;
}
} else if (compose_state) { // second character of compose
char c1 = char(compose_state); // retrieve first character
// now search for the pair in either order:
for (const char *p = compose_pairs; *p; p += 2) {
if (p[0] == ascii && p[1] == c1 || p[1] == ascii && p[0] == c1) {
e_text[0] = (p-compose_pairs)/2+0xA0;
del = 1; // delete the old character and insert new one
compose_state = 0;
return 1;
}
}
}
int i = e_keysym;
// See if they type the compose prefix key:
if (i == FL_Control_R || i == 0xff20/* Multi-Key */) {
compose_state = 1;
return 1;
}
#ifndef WIN32 // X only
// See if they typed a dead key. This gets it into the same state as
// typing prefix+accent:
if (i >= 0xfe50 && i <= 0xfe5b) {
ascii = dead_keys[i-0xfe50];
for (const char *p = compose_pairs; *p; p += 2)
if (p[0] == ascii) {
compose_state = ascii;
return 1;
}
compose_state = 0;
return 1;
}
#endif
// Only insert non-control characters:
if (e_length && (ascii & ~31 && ascii!=127)) {compose_state = 0; return 1;}
return 0;
}
|
