static void add_prefixes(const ucs4::string& str, size_t length, markov_prefix_map& res)
{
for(size_t i = 0; i <= str.size(); ++i) {
const size_t start = i > length ? i - length : 0;
const ucs4::string key(str.begin() + start, str.begin() + i);
const ucs4::char_t c = i != str.size() ? str[i] : 0;
res[key].push_back(c);
}
}
bool addon_filename_legal(const std::string& name)
{
if(name.empty() || name.back() == '.' ||
name.find("..") != std::string::npos ||
name.size() > 255) {
return false;
} else {
// NOTE: We can't use filesystem::base_name() here, since it returns
// the filename up to the *last* dot. "CON.foo.bar" in
// "CON.foo.bar.baz" is still redirected to "CON" on Windows;
// the base_name() approach would cause the name to not match
// any entries on our blacklist.
// Do also note that we're relying on the next check after this
// to flag the name as illegal if it contains a ':' -- a
// trailing colon is a valid way to refer to DOS device names,
// meaning that e.g. "CON:" is equivalent to "CON".
const std::string stem = boost::algorithm::to_upper_copy(name.substr(0, name.find('.')), std::locale::classic());
if(dos_device_names.find(stem) != dos_device_names.end()) {
return false;
}
const ucs4::string name_ucs4 = unicode_cast<ucs4::string>(name);
const std::string name_utf8 = unicode_cast<utf8::string>(name_ucs4);
if(name != name_utf8){ // name is invalid UTF-8
return false;
}
return std::find_if(name_ucs4.begin(), name_ucs4.end(), addon_filename_ucs4char_illegal()) == name_ucs4.end();
}
}
surface textbox::add_text_line(const ucs4::string& text, const SDL_Color& color)
{
line_height_ = font::get_max_height(font_size_);
if(char_y_.empty()) {
char_y_.push_back(0);
} else {
char_y_.push_back(char_y_.back() + line_height_);
}
char_x_.push_back(0);
// Re-calculate the position of each glyph. We approximate this by asking the
// width of each substring, but this is a flawed assumption which won't work with
// some more complex scripts (that is, RTL languages). This part of the work should
// actually be done by the font-rendering system.
std::string visible_string;
ucs4::string wrapped_text;
ucs4::string::const_iterator backup_itor = text.end();
ucs4::string::const_iterator itor = text.begin();
while(itor != text.end()) {
//If this is a space, save copies of the current state so we can roll back
if(char(*itor) == ' ') {
backup_itor = itor;
}
visible_string.append(utils::ucs4char_to_string(*itor));
if(char(*itor) == '\n') {
backup_itor = text.end();
visible_string = "";
}
int w = font::line_width(visible_string, font_size_);
if(wrap_ && w >= inner_location().w) {
if(backup_itor != text.end()) {
int backup = itor - backup_itor;
itor = backup_itor + 1;
if(backup > 0) {
char_x_.erase(char_x_.end()-backup, char_x_.end());
char_y_.erase(char_y_.end()-backup, char_y_.end());
wrapped_text.erase(wrapped_text.end()-backup, wrapped_text.end());
}
}
backup_itor = text.end();
wrapped_text.push_back(ucs4::char_t('\n'));
char_x_.push_back(0);
char_y_.push_back(char_y_.back() + line_height_);
visible_string = "";
} else {
wrapped_text.push_back(*itor);
char_x_.push_back(w);
char_y_.push_back(char_y_.back() + (char(*itor) == '\n' ? line_height_ : 0));
++itor;
}
}
const std::string s = utils::ucs4string_to_string(wrapped_text);
const surface res(font::get_rendered_text(s, font_size_, color));
return res;
}