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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* Copyright 2018 Avi Halachmi (:avih) avihpit@yahoo.com https://github.com/avih
* MIT/X Consortium License
*/
/*
* U+25XX codepoints data
*
* References:
* http://www.unicode.org/charts/PDF/U2500.pdf
* http://www.unicode.org/charts/PDF/U2580.pdf
*
* Test page:
* https://github.com/GNOME/vte/blob/master/doc/boxes.txt
*/
/* Each shape is encoded as 16-bits. Higher bits are category, lower are data */
/* Categories (mutually exclusive except BDB): */
/* For convenience, BDL/BDA/BBS/BDB are 1 bit each, the rest are enums */
#define BDL (1<<8) /* Box Draw Lines (light/double/heavy) */
#define BDA (1<<9) /* Box Draw Arc (light) */
#define BBD (1<<10) /* Box Block Down (lower) X/8 */
#define BBL (2<<10) /* Box Block Left X/8 */
#define BBU (3<<10) /* Box Block Upper X/8 */
#define BBR (4<<10) /* Box Block Right X/8 */
#define BBQ (5<<10) /* Box Block Quadrants */
#define BRL (6<<10) /* Box Braille (data is lower byte of U28XX) */
#define BBS (1<<14) /* Box Block Shades */
#define BDB (1<<15) /* Box Draw is Bold */
/* (BDL/BDA) Light/Double/Heavy x Left/Up/Right/Down/Horizontal/Vertical */
/* Heavy is light+double (literally drawing light+double align to form heavy) */
#define LL (1<<0)
#define LU (1<<1)
#define LR (1<<2)
#define LD (1<<3)
#define LH (LL+LR)
#define LV (LU+LD)
#define DL (1<<4)
#define DU (1<<5)
#define DR (1<<6)
#define DD (1<<7)
#define DH (DL+DR)
#define DV (DU+DD)
#define HL (LL+DL)
#define HU (LU+DU)
#define HR (LR+DR)
#define HD (LD+DD)
#define HH (HL+HR)
#define HV (HU+HD)
/* (BBQ) Quadrants Top/Bottom x Left/Right */
#define TL (1<<0)
#define TR (1<<1)
#define BL (1<<2)
#define BR (1<<3)
/* Data for U+2500 - U+259F except dashes/diagonals */
static const unsigned short boxdata[256] = {
/* light lines */
[0x00] = BDL + LH, /* light horizontal */
[0x02] = BDL + LV, /* light vertical */
[0x0c] = BDL + LD + LR, /* light down and right */
[0x10] = BDL + LD + LL, /* light down and left */
[0x14] = BDL + LU + LR, /* light up and right */
[0x18] = BDL + LU + LL, /* light up and left */
[0x1c] = BDL + LV + LR, /* light vertical and right */
[0x24] = BDL + LV + LL, /* light vertical and left */
[0x2c] = BDL + LH + LD, /* light horizontal and down */
[0x34] = BDL + LH + LU, /* light horizontal and up */
[0x3c] = BDL + LV + LH, /* light vertical and horizontal */
[0x74] = BDL + LL, /* light left */
[0x75] = BDL + LU, /* light up */
[0x76] = BDL + LR, /* light right */
[0x77] = BDL + LD, /* light down */
/* heavy [+light] lines */
[0x01] = BDL + HH,
[0x03] = BDL + HV,
[0x0d] = BDL + HR + LD,
[0x0e] = BDL + HD + LR,
[0x0f] = BDL + HD + HR,
[0x11] = BDL + HL + LD,
[0x12] = BDL + HD + LL,
[0x13] = BDL + HD + HL,
[0x15] = BDL + HR + LU,
[0x16] = BDL + HU + LR,
[0x17] = BDL + HU + HR,
[0x19] = BDL + HL + LU,
[0x1a] = BDL + HU + LL,
[0x1b] = BDL + HU + HL,
[0x1d] = BDL + HR + LV,
[0x1e] = BDL + HU + LD + LR,
[0x1f] = BDL + HD + LR + LU,
[0x20] = BDL + HV + LR,
[0x21] = BDL + HU + HR + LD,
[0x22] = BDL + HD + HR + LU,
[0x23] = BDL + HV + HR,
[0x25] = BDL + HL + LV,
[0x26] = BDL + HU + LD + LL,
[0x27] = BDL + HD + LU + LL,
[0x28] = BDL + HV + LL,
[0x29] = BDL + HU + HL + LD,
[0x2a] = BDL + HD + HL + LU,
[0x2b] = BDL + HV + HL,
[0x2d] = BDL + HL + LD + LR,
[0x2e] = BDL + HR + LL + LD,
[0x2f] = BDL + HH + LD,
[0x30] = BDL + HD + LH,
[0x31] = BDL + HD + HL + LR,
[0x32] = BDL + HR + HD + LL,
[0x33] = BDL + HH + HD,
[0x35] = BDL + HL + LU + LR,
[0x36] = BDL + HR + LU + LL,
[0x37] = BDL + HH + LU,
[0x38] = BDL + HU + LH,
[0x39] = BDL + HU + HL + LR,
[0x3a] = BDL + HU + HR + LL,
[0x3b] = BDL + HH + HU,
[0x3d] = BDL + HL + LV + LR,
[0x3e] = BDL + HR + LV + LL,
[0x3f] = BDL + HH + LV,
[0x40] = BDL + HU + LH + LD,
[0x41] = BDL + HD + LH + LU,
[0x42] = BDL + HV + LH,
[0x43] = BDL + HU + HL + LD + LR,
[0x44] = BDL + HU + HR + LD + LL,
[0x45] = BDL + HD + HL + LU + LR,
[0x46] = BDL + HD + HR + LU + LL,
[0x47] = BDL + HH + HU + LD,
[0x48] = BDL + HH + HD + LU,
[0x49] = BDL + HV + HL + LR,
[0x4a] = BDL + HV + HR + LL,
[0x4b] = BDL + HV + HH,
[0x78] = BDL + HL,
[0x79] = BDL + HU,
[0x7a] = BDL + HR,
[0x7b] = BDL + HD,
[0x7c] = BDL + HR + LL,
[0x7d] = BDL + HD + LU,
[0x7e] = BDL + HL + LR,
[0x7f] = BDL + HU + LD,
/* double [+light] lines */
[0x50] = BDL + DH,
[0x51] = BDL + DV,
[0x52] = BDL + DR + LD,
[0x53] = BDL + DD + LR,
[0x54] = BDL + DR + DD,
[0x55] = BDL + DL + LD,
[0x56] = BDL + DD + LL,
[0x57] = BDL + DL + DD,
[0x58] = BDL + DR + LU,
[0x59] = BDL + DU + LR,
[0x5a] = BDL + DU + DR,
[0x5b] = BDL + DL + LU,
[0x5c] = BDL + DU + LL,
[0x5d] = BDL + DL + DU,
[0x5e] = BDL + DR + LV,
[0x5f] = BDL + DV + LR,
[0x60] = BDL + DV + DR,
[0x61] = BDL + DL + LV,
[0x62] = BDL + DV + LL,
[0x63] = BDL + DV + DL,
[0x64] = BDL + DH + LD,
[0x65] = BDL + DD + LH,
[0x66] = BDL + DD + DH,
[0x67] = BDL + DH + LU,
[0x68] = BDL + DU + LH,
[0x69] = BDL + DH + DU,
[0x6a] = BDL + DH + LV,
[0x6b] = BDL + DV + LH,
[0x6c] = BDL + DH + DV,
/* (light) arcs */
[0x6d] = BDA + LD + LR,
[0x6e] = BDA + LD + LL,
[0x6f] = BDA + LU + LL,
[0x70] = BDA + LU + LR,
/* Lower (Down) X/8 block (data is 8 - X) */
[0x81] = BBD + 7, [0x82] = BBD + 6, [0x83] = BBD + 5, [0x84] = BBD + 4,
[0x85] = BBD + 3, [0x86] = BBD + 2, [0x87] = BBD + 1, [0x88] = BBD + 0,
/* Left X/8 block (data is X) */
[0x89] = BBL + 7, [0x8a] = BBL + 6, [0x8b] = BBL + 5, [0x8c] = BBL + 4,
[0x8d] = BBL + 3, [0x8e] = BBL + 2, [0x8f] = BBL + 1,
/* upper 1/2 (4/8), 1/8 block (X), right 1/2, 1/8 block (8-X) */
[0x80] = BBU + 4, [0x94] = BBU + 1,
[0x90] = BBR + 4, [0x95] = BBR + 7,
/* Quadrants */
[0x96] = BBQ + BL,
[0x97] = BBQ + BR,
[0x98] = BBQ + TL,
[0x99] = BBQ + TL + BL + BR,
[0x9a] = BBQ + TL + BR,
[0x9b] = BBQ + TL + TR + BL,
[0x9c] = BBQ + TL + TR + BR,
[0x9d] = BBQ + TR,
[0x9e] = BBQ + BL + TR,
[0x9f] = BBQ + BL + TR + BR,
/* Shades, data is an alpha value in 25% units (1/4, 1/2, 3/4) */
[0x91] = BBS + 1, [0x92] = BBS + 2, [0x93] = BBS + 3,
/* U+2504 - U+250B, U+254C - U+254F: unsupported (dashes) */
/* U+2571 - U+2573: unsupported (diagonals) */
};
|
