#include "pseudolocalize.h"
using namespace std;
// String basis to generate expansion
static const String16 k_expansion_string = String16("one two three "
"four five six seven eight nine ten eleven twelve thirteen "
"fourteen fiveteen sixteen seventeen nineteen twenty");
// Special unicode characters to override directionality of the words
static const String16 k_rlm = String16("\xe2\x80\x8f");
static const String16 k_rlo = String16("\xE2\x80\xae");
static const String16 k_pdf = String16("\xE2\x80\xac");
// Placeholder marks
static const String16 k_placeholder_open = String16("\xc2\xbb");
static const String16 k_placeholder_close = String16("\xc2\xab");
static const char16_t k_arg_start = '{';
static const char16_t k_arg_end = '}';
Pseudolocalizer::Pseudolocalizer(PseudolocalizationMethod m)
: mImpl(nullptr), mLastDepth(0) {
setMethod(m);
}
void Pseudolocalizer::setMethod(PseudolocalizationMethod m) {
if (mImpl) {
delete mImpl;
}
if (m == PSEUDO_ACCENTED) {
mImpl = new PseudoMethodAccent();
} else if (m == PSEUDO_BIDI) {
mImpl = new PseudoMethodBidi();
} else {
mImpl = new PseudoMethodNone();
}
}
String16 Pseudolocalizer::text(const String16& text) {
String16 out;
size_t depth = mLastDepth;
size_t lastpos, pos;
const size_t length= text.size();
const char16_t* str = text.string();
bool escaped = false;
for (lastpos = pos = 0; pos < length; pos++) {
char16_t c = str[pos];
if (escaped) {
escaped = false;
continue;
}
if (c == '\'') {
escaped = true;
continue;
}
if (c == k_arg_start) {
depth++;
} else if (c == k_arg_end && depth) {
depth--;
}
if (mLastDepth != depth || pos == length - 1) {
bool pseudo = ((mLastDepth % 2) == 0);
size_t nextpos = pos;
if (!pseudo || depth == mLastDepth) {
nextpos++;
}
size_t size = nextpos - lastpos;
if (size) {
String16 chunk = String16(text, size, lastpos);
if (pseudo) {
chunk = mImpl->text(chunk);
} else if (str[lastpos] == k_arg_start &&
str[nextpos - 1] == k_arg_end) {
chunk = mImpl->placeholder(chunk);
}
out.append(chunk);
}
if (pseudo && depth < mLastDepth) { // End of message
out.append(mImpl->end());
} else if (!pseudo && depth > mLastDepth) { // Start of message
out.append(mImpl->start());
}
lastpos = nextpos;
mLastDepth = depth;
}
}
return out;
}
static const char*
pseudolocalize_char(const char16_t c)
{
switch (c) {
case 'a': return "\xc3\xa5";
case 'b': return "\xc9\x93";
case 'c': return "\xc3\xa7";
case 'd': return "\xc3\xb0";
case 'e': return "\xc3\xa9";
case 'f': return "\xc6\x92";
case 'g': return "\xc4\x9d";
case 'h': return "\xc4\xa5";
case 'i': return "\xc3\xae";
case 'j': return "\xc4\xb5";
case 'k': return "\xc4\xb7";
case 'l': return "\xc4\xbc";
case 'm': return "\xe1\xb8\xbf";
case 'n': return "\xc3\xb1";
case 'o': return "\xc3\xb6";
case 'p': return "\xc3\xbe";
case 'q': return "\x51";
case 'r': return "\xc5\x95";
case 's': return "\xc5\xa1";
case 't': return "\xc5\xa3";
case 'u': return "\xc3\xbb";
case 'v': return "\x56";
case 'w': return "\xc5\xb5";
case 'x': return "\xd1\x85";
case 'y': return "\xc3\xbd";
case 'z': return "\xc5\xbe";
case 'A': return "\xc3\x85";
case 'B': return "\xce\xb2";
case 'C': return "\xc3\x87";
case 'D': return "\xc3\x90";
case 'E': return "\xc3\x89";
case 'G': return "\xc4\x9c";
case 'H': return "\xc4\xa4";
case 'I': return "\xc3\x8e";
case 'J': return "\xc4\xb4";
case 'K': return "\xc4\xb6";
case 'L': return "\xc4\xbb";
case 'M': return "\xe1\xb8\xbe";
case 'N': return "\xc3\x91";
case 'O': return "\xc3\x96";
case 'P': return "\xc3\x9e";
case 'Q': return "\x71";
case 'R': return "\xc5\x94";
case 'S': return "\xc5\xa0";
case 'T': return "\xc5\xa2";
case 'U': return "\xc3\x9b";
case 'V': return "\xce\xbd";
case 'W': return "\xc5\xb4";
case 'X': return "\xc3\x97";
case 'Y': return "\xc3\x9d";
case 'Z': return "\xc5\xbd";
case '!': return "\xc2\xa1";
case '?': return "\xc2\xbf";
case '$': return "\xe2\x82\xac";
default: return NULL;
}
}
static bool is_possible_normal_placeholder_end(const char16_t c) {
switch (c) {
case 's': return true;
case 'S': return true;
case 'c': return true;
case 'C': return true;
case 'd': return true;
case 'o': return true;
case 'x': return true;
case 'X': return true;
case 'f': return true;
case 'e': return true;
case 'E': return true;
case 'g': return true;
case 'G': return true;
case 'a': return true;
case 'A': return true;
case 'b': return true;
case 'B': return true;
case 'h': return true;
case 'H': return true;
case '%': return true;
case 'n': return true;
default: return false;
}
}
static String16 pseudo_generate_expansion(const unsigned int length) {
String16 result = k_expansion_string;
const char16_t* s = result.string();
if (result.size() < length) {
result += String16(" ");
result += pseudo_generate_expansion(length - result.size());
} else {
int ext = 0;
// Should contain only whole words, so looking for a space
for (unsigned int i = length + 1; i < result.size(); ++i) {
++ext;
if (s[i] == ' ') {
break;
}
}
result.remove(length + ext, 0);
}
return result;
}
static bool is_space(const char16_t c) {
return (c == ' ' || c == '\t' || c == '\n');
}
String16 PseudoMethodAccent::start() {
String16 result;
if (mDepth == 0) {
result = String16(String8("["));
}
mWordCount = mLength = 0;
mDepth++;
return result;
}
String16 PseudoMethodAccent::end() {
String16 result;
if (mLength) {
result.append(String16(String8(" ")));
result.append(pseudo_generate_expansion(
mWordCount > 3 ? mLength : mLength / 2));
}
mWordCount = mLength = 0;
mDepth--;
if (mDepth == 0) {
result.append(String16(String8("]")));
}
return result;
}
/**
* Converts characters so they look like they've been localized.
*
* Note: This leaves escape sequences untouched so they can later be
* processed by ResTable::collectString in the normal way.
*/
String16 PseudoMethodAccent::text(const String16& source)
{
const char16_t* s = source.string();
String16 result;
const size_t I = source.size();
bool lastspace = true;
for (size_t i=0; i<I; i++) {
char16_t c = s[i];
if (c == '\\') {
// Escape syntax, no need to pseudolocalize
if (i<I-1) {
result += String16("\\");
i++;
c = s[i];
switch (c) {
case 'u':
// this one takes up 5 chars
result += String16(s+i, 5);
i += 4;
break;
case 't':
case 'n':
case '#':
case '@':
case '?':
case '"':
case '\'':
case '\\':
default:
result.append(&c, 1);
break;
}
} else {
result.append(&c, 1);
}
} else if (c == '%') {
// Placeholder syntax, no need to pseudolocalize
String16 chunk;
bool end = false;
chunk.append(&c, 1);
while (!end && i < I) {
++i;
c = s[i];
chunk.append(&c, 1);
if (is_possible_normal_placeholder_end(c)) {
end = true;
} else if (c == 't') {
++i;
c = s[i];
chunk.append(&c, 1);
end = true;
}
}
// Treat chunk as a placeholder unless it ends with %.
result += ((c == '%') ? chunk : placeholder(chunk));
} else if (c == '<' || c == '&') {
// html syntax, no need to pseudolocalize
bool tag_closed = false;
while (!tag_closed && i < I) {
if (c == '&') {
String16 escape_text;
escape_text.append(&c, 1);
bool end = false;
size_t htmlCodePos = i;
while (!end && htmlCodePos < I) {
++htmlCodePos;
c = s[htmlCodePos];
escape_text.append(&c, 1);
// Valid html code
if (c == ';') {
end = true;
i = htmlCodePos;
}
// Wrong html code
else if (!((c == '#' ||
(c >= 'a' && c <= 'z') ||
(c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9')))) {
end = true;
}
}
result += escape_text;
if (escape_text != String16("<")) {
tag_closed = true;
}
continue;
}
if (c == '>') {
tag_closed = true;
result.append(&c, 1);
continue;
}
result.append(&c, 1);
i++;
c = s[i];
}
} else {
// This is a pure text that should be pseudolocalized
const char* p = pseudolocalize_char(c);
if (p != NULL) {
result += String16(p);
} else {
bool space = is_space(c);
if (lastspace && !space) {
mWordCount++;
}
lastspace = space;
result.append(&c, 1);
}
// Count only pseudolocalizable chars and delimiters
mLength++;
}
}
return result;
}
String16 PseudoMethodAccent::placeholder(const String16& source) {
// Surround a placeholder with brackets
return k_placeholder_open + source + k_placeholder_close;
}
String16 PseudoMethodBidi::text(const String16& source)
{
const char16_t* s = source.string();
String16 result;
bool lastspace = true;
bool space = true;
bool escape = false;
const char16_t ESCAPE_CHAR = '\\';
for (size_t i=0; i<source.size(); i++) {
char16_t c = s[i];
if (!escape && c == ESCAPE_CHAR) {
escape = true;
continue;
}
space = (!escape && is_space(c)) || (escape && (c == 'n' || c == 't'));
if (lastspace && !space) {
// Word start
result += k_rlm + k_rlo;
} else if (!lastspace && space) {
// Word end
result += k_pdf + k_rlm;
}
lastspace = space;
if (escape) {
result.append(&ESCAPE_CHAR, 1);
escape=false;
}
result.append(&c, 1);
}
if (!lastspace) {
// End of last word
result += k_pdf + k_rlm;
}
return result;
}
String16 PseudoMethodBidi::placeholder(const String16& source) {
// Surround a placeholder with directionality change sequence
return k_rlm + k_rlo + source + k_pdf + k_rlm;
}