Fix #9726: Preview does not have correct font size

diff --git a/src/mathed/InsetMathHull.cpp b/src/mathed/InsetMathHull.cpp
index 08bbe414a966285b35c687d3cb73fc3278bcab11..92372f02cb8f206377c69b41b7b422f74c6bd11c 100644 (file)
--- a/src/mathed/InsetMathHull.cpp
+++ b/src/mathed/InsetMathHull.cpp
@@ -713,6 +713,23 @@ void InsetMathHull::preparePreview(DocIterator const & pos,
        for (; it != end; ++it)
                macro_preamble.append(*it);
 
+       // set the font series and size for this snippet
+       DocIterator dit = pos;
+       while (dit.inMathed())
+               dit.pop_back();
+       Paragraph const & par = dit.paragraph();
+       Font font = par.getFontSettings(buffer->params(), dit.pos());
+       font.fontInfo().realize(par.layout().font);
+       string const lsize = font.latexSize();
+       docstring setfont;
+       docstring endfont;
+       if (font.fontInfo().series() == BOLD_SERIES) {
+               setfont += from_ascii("\\textbf{");
+               endfont += '}';
+       }
+       if (lsize != "normalsize" && !prefixIs(lsize, "error"))
+               setfont += from_ascii("\\" + lsize + '\n'); 
+
        docstring setcnt;
        if (forexport && haveNumbers()) {
                docstring eqstr = from_ascii("equation");
@@ -734,7 +751,8 @@ void InsetMathHull::preparePreview(DocIterator const & pos,
                                          '{' + convert<docstring>(num) + '}';
                }
        }
-       docstring const snippet = macro_preamble + setcnt + latexString(*this);
+       docstring const snippet = macro_preamble + setfont + setcnt
+                                 + latexString(*this) + endfont;
        LYXERR(Debug::MACROS, "Preview snippet: " << snippet);
        preview_->addPreview(snippet, *buffer, forexport);
 }