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Prevent iconv exception in previews (#13042)

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The preview loader assumes all content is in the main document encoding.

As soon as content was not encodable, LyX crashed. We now check for that
and if non-encodable glyphs are found, we do not produce a preview snippet
and warn.

Ideally, the preview loader should be made aware of encoding changes, or
we should generally use utf8 for previews.
This commit is contained in:
Juergen Spitzmueller 2024-03-16 04:52:51 +01:00
parent 0fb7650786
commit b3fe9cb704
1 changed files with 22 additions and 3 deletions
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25
src/graphics/PreviewLoader.cpp
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@ -849,11 +849,30 @@ void PreviewLoader::Impl::dumpData(odocstream & os,
BitmapFile::const_iterator it = vec.begin();
BitmapFile::const_iterator end = vec.end();
Encoding const & enc = buffer_.params().encoding();
for (; it != end; ++it) {
docstring res;
bool uncodable_content = false;
// check whether the content is encodable
// FIXME: the preview loader should be able
// to handle multiple encodings
// or we should generally use utf8
for (char_type n : from_utf8(it->first)) {
if (!enc.encodable(n)) {
LYXERR0("Uncodable character '"
<< docstring(1, n)
<< "' in preview snippet!");
uncodable_content = true;
} else
res += n;
}
// FIXME UNICODE
os << "\\begin{preview}\n"
<< from_utf8(it->first)
<< "\n\\end{preview}\n\n";
os << "\\begin{preview}\n";
// do not show incomplete preview
if (!uncodable_content)
os << res;
os << "\n\\end{preview}\n\n";
}
}