Method FindMissingGlyphs

src/strings.cpp:2306–2326

* Check whether there are glyphs missing in the current language. * @return If glyphs are missing, return \c true, else return \c false. */

 * @return If glyphs are missing, return \c true, else return \c false.
 */
bool MissingGlyphSearcher::FindMissingGlyphs()
{
	FontCache::LoadFontCaches(this->Monospace() ? FontSizes{FS_MONO} : FONTSIZES_REQUIRED);

	this->Reset();
	for (auto text = this->NextString(); text.has_value(); text = this->NextString()) {
		FontSize size = this->DefaultSize();
		FontCache *fc = FontCache::Get(size);
		for (char32_t c : Utf8View(*text)) {
			if (c >= SCC_FIRST_FONT && c <= SCC_LAST_FONT) {
				size = (FontSize)(c - SCC_FIRST_FONT);
				fc = FontCache::Get(size);
			} else if (!IsInsideMM(c, SCC_SPRITE_START, SCC_SPRITE_END) && IsPrintable(c) && !IsTextDirectionChar(c) && fc->MapCharToGlyph(c, false) == 0) {
				/* The character is printable, but not in the normal font. This is the case we were testing for. */
				Debug(fontcache, 0, "Font is missing glyphs to display char 0x{:X} in {} font size", static_cast<uint32_t>(c), FontSizeToName(size));
				return true;
			}
		}
	}
	return false;
}

/** Helper for searching through the language pack. */
class LanguagePackGlyphSearcher : public MissingGlyphSearcher {