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 ttext::set_text(const std::string& text, const bool markedup)
{
if(markedup != markedup_text_ || text != text_) {
assert(layout_);
const ucs4::string wide = unicode_cast<ucs4::string>(text);
const std::string narrow = unicode_cast<utf8::string>(wide);
if(text != narrow) {
ERR_GUI_L << "ttext::" << __func__
<< " text '" << text
<< "' contains invalid utf-8, trimmed the invalid parts.\n";
}
if(markedup) {
if(!set_markup(narrow)) {
return false;
}
} else {
/*
* pango_layout_set_text after pango_layout_set_markup might
* leave the layout in an undefined state regarding markup so
* clear it unconditionally.
*/
pango_layout_set_attributes(layout_, nullptr);
pango_layout_set_text(layout_, narrow.c_str(), narrow.size());
}
text_ = narrow;
length_ = wide.size();
markedup_text_ = markedup;
calculation_dirty_ = true;
surface_dirty_ = true;
}
return true;
}