1 /*!
2
3 This library implements
4 [Unicode Vertical_Orientation Property](https://www.unicode.org/reports/tr50/tr50-19.html)
5 (annex #50).
6
7 ```rust
8 use unicode_vo::*;
9
10 assert_eq!(char_orientation('A'), Orientation::Rotated);
11 assert_eq!(char_orientation('本'), Orientation::Upright);
12 ```
13
14 */
15
16 #![doc(html_root_url = "https://docs.rs/unicode-vo/0.1.0")]
17
18 #![forbid(unsafe_code)]
19
20 /// Character orientation.
21 #[derive(Clone, Copy, PartialEq, Debug)]
22 pub enum Orientation {
23 /// Characters which are displayed upright, with the same orientation that appears in
24 /// the code charts.
25 ///
26 /// Original name: **U**
27 Upright,
28
29 /// Characters which are displayed sideways, rotated 90 degrees clockwise compared to
30 /// the code charts.
31 ///
32 /// Original name: **R**
33 Rotated,
34
35 /// Characters which are not just upright or sideways, but generally require
36 /// a different glyph than in the code charts when used in vertical texts.
37 /// In addition, as a fallback, the character can be displayed with
38 /// the code chart glyph upright.
39 ///
40 /// Original name: **Tu**
41 TransformedOrUpright,
42
43 /// Same as Tu except that, as a fallback, the character can be displayed with
44 /// the code chart glyph rotated 90 degrees clockwise.
45 ///
46 /// Original name: **Tr**
47 TransformedOrRotated,
48 }
49
50 /// Returns a vertical orientation of a character.
51 ///
52 /// Based on <https://www.unicode.org/Public/vertical/revision-17/VerticalOrientation-17.txt>.
char_orientation(c: char) -> Orientation53 pub fn char_orientation(c: char) -> Orientation {
54 match c as u32 {
55 0x00A7 => Orientation::Upright,
56 0x00A9 => Orientation::Upright,
57 0x00AE => Orientation::Upright,
58 0x00B1 => Orientation::Upright,
59 0x00BC...0x00BE => Orientation::Upright,
60 0x00D7 => Orientation::Upright,
61 0x00F7 => Orientation::Upright,
62 0x02EA...0x02EB => Orientation::Upright,
63 0x1100...0x11FF => Orientation::Upright,
64 0x1401...0x167F => Orientation::Upright,
65 0x18B0...0x18FF => Orientation::Upright,
66 0x2016 => Orientation::Upright,
67 0x2020...0x2021 => Orientation::Upright,
68 0x2030...0x2031 => Orientation::Upright,
69 0x203B...0x203C => Orientation::Upright,
70 0x2042 => Orientation::Upright,
71 0x2047...0x2049 => Orientation::Upright,
72 0x2051 => Orientation::Upright,
73 0x2065 => Orientation::Upright,
74 0x20DD...0x20E0 => Orientation::Upright,
75 0x20E2...0x20E4 => Orientation::Upright,
76 0x2100...0x2101 => Orientation::Upright,
77 0x2103...0x2109 => Orientation::Upright,
78 0x210F => Orientation::Upright,
79 0x2113...0x2114 => Orientation::Upright,
80 0x2116...0x2117 => Orientation::Upright,
81 0x211E...0x2123 => Orientation::Upright,
82 0x2125 => Orientation::Upright,
83 0x2127 => Orientation::Upright,
84 0x2129 => Orientation::Upright,
85 0x212E => Orientation::Upright,
86 0x2135...0x213F => Orientation::Upright,
87 0x2145...0x214A => Orientation::Upright,
88 0x214C...0x214D => Orientation::Upright,
89 0x214F => Orientation::Upright,
90 0x2150...0x2189 => Orientation::Upright,
91 0x218C...0x218F => Orientation::Upright,
92 0x221E => Orientation::Upright,
93 0x2234...0x2235 => Orientation::Upright,
94 0x2300...0x2307 => Orientation::Upright,
95 0x230C...0x231F => Orientation::Upright,
96 0x2324...0x2328 => Orientation::Upright,
97 0x2329...0x232A => Orientation::TransformedOrRotated,
98 0x232B => Orientation::Upright,
99 0x237D...0x239A => Orientation::Upright,
100 0x23BE...0x23CD => Orientation::Upright,
101 0x23CF => Orientation::Upright,
102 0x23D1...0x23DB => Orientation::Upright,
103 0x23E2...0x23FF => Orientation::Upright,
104 0x2400...0x2422 => Orientation::Upright,
105 0x2424...0x243F => Orientation::Upright,
106 0x2440...0x245F => Orientation::Upright,
107 0x2460...0x24FF => Orientation::Upright,
108 0x25A0...0x25FF => Orientation::Upright,
109 0x2600...0x2619 => Orientation::Upright,
110 0x2620...0x26FF => Orientation::Upright,
111 0x2700...0x2767 => Orientation::Upright,
112 0x2776...0x2793 => Orientation::Upright,
113 0x2B12...0x2B2F => Orientation::Upright,
114 0x2B50...0x2B59 => Orientation::Upright,
115 0x2BB8...0x2BEB => Orientation::Upright,
116 0x2BF0...0x2BFF => Orientation::Upright,
117 0x2E80...0x2EFF => Orientation::Upright,
118 0x2F00...0x2FDF => Orientation::Upright,
119 0x2FE0...0x2FEF => Orientation::Upright,
120 0x2FF0...0x2FFF => Orientation::Upright,
121 0x3000 => Orientation::Upright,
122 0x3001...0x3002 => Orientation::TransformedOrUpright,
123 0x3003...0x3007 => Orientation::Upright,
124 0x3008...0x3011 => Orientation::TransformedOrRotated,
125 0x3012...0x3013 => Orientation::Upright,
126 0x3014...0x301F => Orientation::TransformedOrRotated,
127 0x3020...0x302F => Orientation::Upright,
128 0x3030 => Orientation::TransformedOrRotated,
129 0x3031...0x3040 => Orientation::Upright,
130 0x3041 => Orientation::TransformedOrUpright,
131 0x3042 => Orientation::Upright,
132 0x3043 => Orientation::TransformedOrUpright,
133 0x3044 => Orientation::Upright,
134 0x3045 => Orientation::TransformedOrUpright,
135 0x3046 => Orientation::Upright,
136 0x3047 => Orientation::TransformedOrUpright,
137 0x3048 => Orientation::Upright,
138 0x3049 => Orientation::TransformedOrUpright,
139 0x304A...0x3062 => Orientation::Upright,
140 0x3063 => Orientation::TransformedOrUpright,
141 0x3064...0x3082 => Orientation::Upright,
142 0x3083 => Orientation::TransformedOrUpright,
143 0x3084 => Orientation::Upright,
144 0x3085 => Orientation::TransformedOrUpright,
145 0x3086 => Orientation::Upright,
146 0x3087 => Orientation::TransformedOrUpright,
147 0x3088...0x308D => Orientation::Upright,
148 0x308E => Orientation::TransformedOrUpright,
149 0x308F...0x3094 => Orientation::Upright,
150 0x3095...0x3096 => Orientation::TransformedOrUpright,
151 0x3097...0x309A => Orientation::Upright,
152 0x309B...0x309C => Orientation::TransformedOrUpright,
153 0x309D...0x309F => Orientation::Upright,
154 0x30A0 => Orientation::TransformedOrRotated,
155 0x30A1 => Orientation::TransformedOrUpright,
156 0x30A2 => Orientation::Upright,
157 0x30A3 => Orientation::TransformedOrUpright,
158 0x30A4 => Orientation::Upright,
159 0x30A5 => Orientation::TransformedOrUpright,
160 0x30A6 => Orientation::Upright,
161 0x30A7 => Orientation::TransformedOrUpright,
162 0x30A8 => Orientation::Upright,
163 0x30A9 => Orientation::TransformedOrUpright,
164 0x30AA...0x30C2 => Orientation::Upright,
165 0x30C3 => Orientation::TransformedOrUpright,
166 0x30C4...0x30E2 => Orientation::Upright,
167 0x30E3 => Orientation::TransformedOrUpright,
168 0x30E4 => Orientation::Upright,
169 0x30E5 => Orientation::TransformedOrUpright,
170 0x30E6 => Orientation::Upright,
171 0x30E7 => Orientation::TransformedOrUpright,
172 0x30E8...0x30ED => Orientation::Upright,
173 0x30EE => Orientation::TransformedOrUpright,
174 0x30EF...0x30F4 => Orientation::Upright,
175 0x30F5...0x30F6 => Orientation::TransformedOrUpright,
176 0x30F7...0x30FB => Orientation::Upright,
177 0x30FC => Orientation::TransformedOrRotated,
178 0x30FD...0x30FF => Orientation::Upright,
179 0x3100...0x3126 => Orientation::Upright,
180 0x3127 => Orientation::TransformedOrUpright,
181 0x3128...0x312F => Orientation::Upright,
182 0x3130...0x318F => Orientation::Upright,
183 0x3190...0x319F => Orientation::Upright,
184 0x31A0...0x31BF => Orientation::Upright,
185 0x31C0...0x31EF => Orientation::Upright,
186 0x31F0...0x31FF => Orientation::TransformedOrUpright,
187 0x3200...0x321E => Orientation::Upright,
188 0x321F...0x32FF => Orientation::Upright,
189 0x3300...0x3357 => Orientation::TransformedOrUpright,
190 0x3358...0x337A => Orientation::Upright,
191 0x337B...0x337F => Orientation::TransformedOrUpright,
192 0x3380...0x33FF => Orientation::Upright,
193 0x3400...0x4DBF => Orientation::Upright,
194 0x4DC0...0x4DFF => Orientation::Upright,
195 0x4E00...0x9FFF => Orientation::Upright,
196 0xA000...0xA48F => Orientation::Upright,
197 0xA490...0xA4CF => Orientation::Upright,
198 0xA960...0xA97F => Orientation::Upright,
199 0xAC00...0xD7AF => Orientation::Upright,
200 0xD7B0...0xD7FF => Orientation::Upright,
201 0xE000...0xF8FF => Orientation::Upright,
202 0xF900...0xFAFF => Orientation::Upright,
203 0xFE10...0xFE19 => Orientation::Upright,
204 0xFE1A...0xFE1F => Orientation::Upright,
205 0xFE30...0xFE48 => Orientation::Upright,
206 0xFE50...0xFE52 => Orientation::TransformedOrUpright,
207 0xFE53...0xFE57 => Orientation::Upright,
208 0xFE59...0xFE5E => Orientation::TransformedOrRotated,
209 0xFE5F...0xFE62 => Orientation::Upright,
210 0xFE67...0xFE6B => Orientation::Upright,
211 0xFE6C...0xFE6F => Orientation::Upright,
212 0xFF01 => Orientation::TransformedOrUpright,
213 0xFF02...0xFF07 => Orientation::Upright,
214 0xFF08...0xFF09 => Orientation::TransformedOrRotated,
215 0xFF0A...0xFF0B => Orientation::Upright,
216 0xFF0C => Orientation::TransformedOrUpright,
217 0xFF0E => Orientation::TransformedOrUpright,
218 0xFF0F...0xFF19 => Orientation::Upright,
219 0xFF1A...0xFF1B => Orientation::TransformedOrRotated,
220 0xFF1F => Orientation::TransformedOrUpright,
221 0xFF20 => Orientation::Upright,
222 0xFF21...0xFF3A => Orientation::Upright,
223 0xFF3B => Orientation::TransformedOrRotated,
224 0xFF3C => Orientation::Upright,
225 0xFF3D => Orientation::TransformedOrRotated,
226 0xFF3E => Orientation::Upright,
227 0xFF3F => Orientation::TransformedOrRotated,
228 0xFF40 => Orientation::Upright,
229 0xFF41...0xFF5A => Orientation::Upright,
230 0xFF5B...0xFF60 => Orientation::TransformedOrRotated,
231 0xFFE0...0xFFE2 => Orientation::Upright,
232 0xFFE3 => Orientation::TransformedOrRotated,
233 0xFFE4...0xFFE7 => Orientation::Upright,
234 0xFFF0...0xFFF8 => Orientation::Upright,
235 0xFFFC...0xFFFD => Orientation::Upright,
236 0x10980...0x1099F => Orientation::Upright,
237 0x11580...0x115FF => Orientation::Upright,
238 0x13000...0x1342F => Orientation::Upright,
239 0x14400...0x1467F => Orientation::Upright,
240 0x16FE0...0x16FFF => Orientation::Upright,
241 0x17000...0x187FF => Orientation::Upright,
242 0x18800...0x18AFF => Orientation::Upright,
243 0x1B000...0x1B0FF => Orientation::Upright,
244 0x1D000...0x1D0FF => Orientation::Upright,
245 0x1D100...0x1D1FF => Orientation::Upright,
246 0x1D300...0x1D35F => Orientation::Upright,
247 0x1D360...0x1D37F => Orientation::Upright,
248 0x1D800...0x1DAAF => Orientation::Upright,
249 0x1F000...0x1F02F => Orientation::Upright,
250 0x1F030...0x1F09F => Orientation::Upright,
251 0x1F0A0...0x1F0FF => Orientation::Upright,
252 0x1F100...0x1F1FF => Orientation::Upright,
253 0x1F200...0x1F201 => Orientation::TransformedOrUpright,
254 0x1F202...0x1F2FF => Orientation::Upright,
255 0x1F300...0x1F5FF => Orientation::Upright,
256 0x1F600...0x1F64F => Orientation::Upright,
257 0x1F650...0x1F67F => Orientation::Upright,
258 0x1F680...0x1F6FF => Orientation::Upright,
259 0x1F700...0x1F77F => Orientation::Upright,
260 0x1F780...0x1F7FF => Orientation::Upright,
261 0x1F900...0x1F9FF => Orientation::Upright,
262 0x20000...0x2A6DF => Orientation::Upright,
263 0x2A6E0...0x2A6FF => Orientation::Upright,
264 0x2A700...0x2B73F => Orientation::Upright,
265 0x2B740...0x2B81F => Orientation::Upright,
266 0x2B820...0x2CEAF => Orientation::Upright,
267 0x2CEB0...0x2F7FF => Orientation::Upright,
268 0x2F800...0x2FA1F => Orientation::Upright,
269 0x2FA20...0x2FFFD => Orientation::Upright,
270 0x30000...0x3FFFD => Orientation::Upright,
271 0xF0000...0xFFFFD => Orientation::Upright,
272 0x100000...0x10FFFD => Orientation::Upright,
273 _ => Orientation::Rotated,
274 }
275 }
276