1 #include "pseudolocalize.h"
2
3 using namespace std;
4
5 // String basis to generate expansion
6 static const String16 k_expansion_string = String16("one two three "
7 "four five six seven eight nine ten eleven twelve thirteen "
8 "fourteen fiveteen sixteen seventeen nineteen twenty");
9
10 // Special unicode characters to override directionality of the words
11 static const String16 k_rlm = String16("\xe2\x80\x8f");
12 static const String16 k_rlo = String16("\xE2\x80\xae");
13 static const String16 k_pdf = String16("\xE2\x80\xac");
14
15 // Placeholder marks
16 static const String16 k_placeholder_open = String16("\xc2\xbb");
17 static const String16 k_placeholder_close = String16("\xc2\xab");
18
19 static const char16_t k_arg_start = '{';
20 static const char16_t k_arg_end = '}';
21
Pseudolocalizer(PseudolocalizationMethod m)22 Pseudolocalizer::Pseudolocalizer(PseudolocalizationMethod m)
23 : mImpl(nullptr), mLastDepth(0) {
24 setMethod(m);
25 }
26
setMethod(PseudolocalizationMethod m)27 void Pseudolocalizer::setMethod(PseudolocalizationMethod m) {
28 if (mImpl) {
29 delete mImpl;
30 }
31 if (m == PSEUDO_ACCENTED) {
32 mImpl = new PseudoMethodAccent();
33 } else if (m == PSEUDO_BIDI) {
34 mImpl = new PseudoMethodBidi();
35 } else {
36 mImpl = new PseudoMethodNone();
37 }
38 }
39
text(const String16 & text)40 String16 Pseudolocalizer::text(const String16& text) {
41 String16 out;
42 size_t depth = mLastDepth;
43 size_t lastpos, pos;
44 const size_t length= text.size();
45 const char16_t* str = text.string();
46 bool escaped = false;
47 for (lastpos = pos = 0; pos < length; pos++) {
48 char16_t c = str[pos];
49 if (escaped) {
50 escaped = false;
51 continue;
52 }
53 if (c == '\'') {
54 escaped = true;
55 continue;
56 }
57
58 if (c == k_arg_start) {
59 depth++;
60 } else if (c == k_arg_end && depth) {
61 depth--;
62 }
63
64 if (mLastDepth != depth || pos == length - 1) {
65 bool pseudo = ((mLastDepth % 2) == 0);
66 size_t nextpos = pos;
67 if (!pseudo || depth == mLastDepth) {
68 nextpos++;
69 }
70 size_t size = nextpos - lastpos;
71 if (size) {
72 String16 chunk = String16(text, size, lastpos);
73 if (pseudo) {
74 chunk = mImpl->text(chunk);
75 } else if (str[lastpos] == k_arg_start &&
76 str[nextpos - 1] == k_arg_end) {
77 chunk = mImpl->placeholder(chunk);
78 }
79 out.append(chunk);
80 }
81 if (pseudo && depth < mLastDepth) { // End of message
82 out.append(mImpl->end());
83 } else if (!pseudo && depth > mLastDepth) { // Start of message
84 out.append(mImpl->start());
85 }
86 lastpos = nextpos;
87 mLastDepth = depth;
88 }
89 }
90 return out;
91 }
92
93 static const char*
pseudolocalize_char(const char16_t c)94 pseudolocalize_char(const char16_t c)
95 {
96 switch (c) {
97 case 'a': return "\xc3\xa5";
98 case 'b': return "\xc9\x93";
99 case 'c': return "\xc3\xa7";
100 case 'd': return "\xc3\xb0";
101 case 'e': return "\xc3\xa9";
102 case 'f': return "\xc6\x92";
103 case 'g': return "\xc4\x9d";
104 case 'h': return "\xc4\xa5";
105 case 'i': return "\xc3\xae";
106 case 'j': return "\xc4\xb5";
107 case 'k': return "\xc4\xb7";
108 case 'l': return "\xc4\xbc";
109 case 'm': return "\xe1\xb8\xbf";
110 case 'n': return "\xc3\xb1";
111 case 'o': return "\xc3\xb6";
112 case 'p': return "\xc3\xbe";
113 case 'q': return "\x51";
114 case 'r': return "\xc5\x95";
115 case 's': return "\xc5\xa1";
116 case 't': return "\xc5\xa3";
117 case 'u': return "\xc3\xbb";
118 case 'v': return "\x56";
119 case 'w': return "\xc5\xb5";
120 case 'x': return "\xd1\x85";
121 case 'y': return "\xc3\xbd";
122 case 'z': return "\xc5\xbe";
123 case 'A': return "\xc3\x85";
124 case 'B': return "\xce\xb2";
125 case 'C': return "\xc3\x87";
126 case 'D': return "\xc3\x90";
127 case 'E': return "\xc3\x89";
128 case 'G': return "\xc4\x9c";
129 case 'H': return "\xc4\xa4";
130 case 'I': return "\xc3\x8e";
131 case 'J': return "\xc4\xb4";
132 case 'K': return "\xc4\xb6";
133 case 'L': return "\xc4\xbb";
134 case 'M': return "\xe1\xb8\xbe";
135 case 'N': return "\xc3\x91";
136 case 'O': return "\xc3\x96";
137 case 'P': return "\xc3\x9e";
138 case 'Q': return "\x71";
139 case 'R': return "\xc5\x94";
140 case 'S': return "\xc5\xa0";
141 case 'T': return "\xc5\xa2";
142 case 'U': return "\xc3\x9b";
143 case 'V': return "\xce\xbd";
144 case 'W': return "\xc5\xb4";
145 case 'X': return "\xc3\x97";
146 case 'Y': return "\xc3\x9d";
147 case 'Z': return "\xc5\xbd";
148 case '!': return "\xc2\xa1";
149 case '?': return "\xc2\xbf";
150 case '$': return "\xe2\x82\xac";
151 default: return NULL;
152 }
153 }
154
is_possible_normal_placeholder_end(const char16_t c)155 static bool is_possible_normal_placeholder_end(const char16_t c) {
156 switch (c) {
157 case 's': return true;
158 case 'S': return true;
159 case 'c': return true;
160 case 'C': return true;
161 case 'd': return true;
162 case 'o': return true;
163 case 'x': return true;
164 case 'X': return true;
165 case 'f': return true;
166 case 'e': return true;
167 case 'E': return true;
168 case 'g': return true;
169 case 'G': return true;
170 case 'a': return true;
171 case 'A': return true;
172 case 'b': return true;
173 case 'B': return true;
174 case 'h': return true;
175 case 'H': return true;
176 case '%': return true;
177 case 'n': return true;
178 default: return false;
179 }
180 }
181
pseudo_generate_expansion(const unsigned int length)182 static String16 pseudo_generate_expansion(const unsigned int length) {
183 String16 result = k_expansion_string;
184 const char16_t* s = result.string();
185 if (result.size() < length) {
186 result += String16(" ");
187 result += pseudo_generate_expansion(length - result.size());
188 } else {
189 int ext = 0;
190 // Should contain only whole words, so looking for a space
191 for (unsigned int i = length + 1; i < result.size(); ++i) {
192 ++ext;
193 if (s[i] == ' ') {
194 break;
195 }
196 }
197 result.remove(length + ext, 0);
198 }
199 return result;
200 }
201
is_space(const char16_t c)202 static bool is_space(const char16_t c) {
203 return (c == ' ' || c == '\t' || c == '\n');
204 }
205
start()206 String16 PseudoMethodAccent::start() {
207 String16 result;
208 if (mDepth == 0) {
209 result = String16(String8("["));
210 }
211 mWordCount = mLength = 0;
212 mDepth++;
213 return result;
214 }
215
end()216 String16 PseudoMethodAccent::end() {
217 String16 result;
218 if (mLength) {
219 result.append(String16(String8(" ")));
220 result.append(pseudo_generate_expansion(
221 mWordCount > 3 ? mLength : mLength / 2));
222 }
223 mWordCount = mLength = 0;
224 mDepth--;
225 if (mDepth == 0) {
226 result.append(String16(String8("]")));
227 }
228 return result;
229 }
230
231 /**
232 * Converts characters so they look like they've been localized.
233 *
234 * Note: This leaves escape sequences untouched so they can later be
235 * processed by ResTable::collectString in the normal way.
236 */
text(const String16 & source)237 String16 PseudoMethodAccent::text(const String16& source)
238 {
239 const char16_t* s = source.string();
240 String16 result;
241 const size_t I = source.size();
242 bool lastspace = true;
243 for (size_t i=0; i<I; i++) {
244 char16_t c = s[i];
245 if (c == '\\') {
246 // Escape syntax, no need to pseudolocalize
247 if (i<I-1) {
248 result += String16("\\");
249 i++;
250 c = s[i];
251 switch (c) {
252 case 'u':
253 // this one takes up 5 chars
254 result += String16(s+i, 5);
255 i += 4;
256 break;
257 case 't':
258 case 'n':
259 case '#':
260 case '@':
261 case '?':
262 case '"':
263 case '\'':
264 case '\\':
265 default:
266 result.append(&c, 1);
267 break;
268 }
269 } else {
270 result.append(&c, 1);
271 }
272 } else if (c == '%') {
273 // Placeholder syntax, no need to pseudolocalize
274 String16 chunk;
275 bool end = false;
276 chunk.append(&c, 1);
277 while (!end && i < I) {
278 ++i;
279 c = s[i];
280 chunk.append(&c, 1);
281 if (is_possible_normal_placeholder_end(c)) {
282 end = true;
283 } else if (c == 't') {
284 ++i;
285 c = s[i];
286 chunk.append(&c, 1);
287 end = true;
288 }
289 }
290 // Treat chunk as a placeholder unless it ends with %.
291 result += ((c == '%') ? chunk : placeholder(chunk));
292 } else if (c == '<' || c == '&') {
293 // html syntax, no need to pseudolocalize
294 bool tag_closed = false;
295 while (!tag_closed && i < I) {
296 if (c == '&') {
297 String16 escape_text;
298 escape_text.append(&c, 1);
299 bool end = false;
300 size_t htmlCodePos = i;
301 while (!end && htmlCodePos < I) {
302 ++htmlCodePos;
303 c = s[htmlCodePos];
304 escape_text.append(&c, 1);
305 // Valid html code
306 if (c == ';') {
307 end = true;
308 i = htmlCodePos;
309 }
310 // Wrong html code
311 else if (!((c == '#' ||
312 (c >= 'a' && c <= 'z') ||
313 (c >= 'A' && c <= 'Z') ||
314 (c >= '0' && c <= '9')))) {
315 end = true;
316 }
317 }
318 result += escape_text;
319 if (escape_text != String16("<")) {
320 tag_closed = true;
321 }
322 continue;
323 }
324 if (c == '>') {
325 tag_closed = true;
326 result.append(&c, 1);
327 continue;
328 }
329 result.append(&c, 1);
330 i++;
331 c = s[i];
332 }
333 } else {
334 // This is a pure text that should be pseudolocalized
335 const char* p = pseudolocalize_char(c);
336 if (p != NULL) {
337 result += String16(p);
338 } else {
339 bool space = is_space(c);
340 if (lastspace && !space) {
341 mWordCount++;
342 }
343 lastspace = space;
344 result.append(&c, 1);
345 }
346 // Count only pseudolocalizable chars and delimiters
347 mLength++;
348 }
349 }
350 return result;
351 }
placeholder(const String16 & source)352 String16 PseudoMethodAccent::placeholder(const String16& source) {
353 // Surround a placeholder with brackets
354 return k_placeholder_open + source + k_placeholder_close;
355 }
356
text(const String16 & source)357 String16 PseudoMethodBidi::text(const String16& source)
358 {
359 const char16_t* s = source.string();
360 String16 result;
361 bool lastspace = true;
362 bool space = true;
363 for (size_t i=0; i<source.size(); i++) {
364 char16_t c = s[i];
365 space = is_space(c);
366 if (lastspace && !space) {
367 // Word start
368 result += k_rlm + k_rlo;
369 } else if (!lastspace && space) {
370 // Word end
371 result += k_pdf + k_rlm;
372 }
373 lastspace = space;
374 result.append(&c, 1);
375 }
376 if (!lastspace) {
377 // End of last word
378 result += k_pdf + k_rlm;
379 }
380 return result;
381 }
382
placeholder(const String16 & source)383 String16 PseudoMethodBidi::placeholder(const String16& source) {
384 // Surround a placeholder with directionality change sequence
385 return k_rlm + k_rlo + source + k_pdf + k_rlm;
386 }
387
388