[LyX/master] Cache the MathData version of macro definition

[Jean-Marc Lasgouttes]

commit f043262c39126cccdea7e683345cddd0e9ef3962
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Sat Jun 6 21:33:21 2026 +0200

    Cache the MathData version of macro definition
    
    Add a member definition_data_ to MathData to avoid having to convert
    the string definition over and over.
    
    Improves performance.
    
    Part of ticket #13321.
---
 src/mathed/InsetMathMacro.cpp | 7 ++-----
 src/mathed/MacroTable.cpp     | 7 ++++---
 src/mathed/MacroTable.h       | 8 ++++++--
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/src/mathed/InsetMathMacro.cpp b/src/mathed/InsetMathMacro.cpp
index 290b461264..8495b53b2c 100644
--- a/src/mathed/InsetMathMacro.cpp
+++ b/src/mathed/InsetMathMacro.cpp
@@ -988,11 +988,8 @@ void InsetMathMacro::validate(LaTeXFeatures & features) const
 		if (displayMode() == DISPLAY_NORMAL)
 			d->definition_.validate(features);
 		else if (displayMode() == DISPLAY_INIT) {
-			if (MacroData const * data = buffer().getMacro(name())) {
-				MathData md(const_cast<Buffer *>(&buffer()));
-				asMathData(data->definition(), md);
-				md.validate(features);
-			}
+			if (MacroData const * data = buffer().getMacro(name()))
+				data->definitionData().validate(features);
 		}
 	}
 	features.activeMacros().erase(name());
diff --git a/src/mathed/MacroTable.cpp b/src/mathed/MacroTable.cpp
index f8d4322cde..6ac335a9a2 100644
--- a/src/mathed/MacroTable.cpp
+++ b/src/mathed/MacroTable.cpp
@@ -39,17 +39,17 @@ namespace lyx {
 /////////////////////////////////////////////////////////////////////
 
 MacroData::MacroData(const Buffer * buf)
-	: buffer_(buf), queried_(true)
+	: buffer_(buf), queried_(true), definition_data_(const_cast<Buffer *>(buf))
 {}
 
 
 MacroData::MacroData(Buffer const * buf, DocIterator const & pos)
-	: buffer_(buf), pos_(pos)
+	: buffer_(buf), pos_(pos), definition_data_(const_cast<Buffer *>(buf))
 {}
 
 
 MacroData::MacroData(Buffer const * buf, InsetMathMacroTemplate const & macro)
-	: buffer_(buf)
+	: buffer_(buf), definition_data_(const_cast<Buffer *>(buf))
 {
 	queryData(macro);
 }
@@ -146,6 +146,7 @@ void MacroData::queryData(InsetMathMacroTemplate const & macro) const
 
 	queried_ = true;
 	definition_ = macro.definition();
+	asMathData(definition_, definition_data_);
 	numargs_ = macro.numArgs();
 	display_ = macro.displayDefinition();
 	redefinition_ = macro.redefinition();
diff --git a/src/mathed/MacroTable.h b/src/mathed/MacroTable.h
index 0c905d6c3c..2042280f51 100644
--- a/src/mathed/MacroTable.h
+++ b/src/mathed/MacroTable.h
@@ -15,6 +15,8 @@
 
 #include "DocIterator.h"
 
+#include "mathed/MathData.h"
+
 #include "support/docstring.h"
 
 #include <map>
@@ -23,8 +25,6 @@
 
 namespace lyx {
 
-class Buffer;
-class MathData;
 class InsetMathMacroTemplate;
 class latexkeys;
 
@@ -47,6 +47,8 @@ public:
 	///
 	docstring const & definition() const { updateData(); return definition_; }
 	///
+	MathData const & definitionData() const { updateData(); return definition_data_; }
+	///
 	docstring const & display() const { updateData(); return display_; }
 	/// arity including optional arguments (if there is any)
 	size_t numargs() const { updateData(); return numargs_; }
@@ -124,6 +126,8 @@ private:
 	///
 	mutable docstring definition_;
 	///
+	mutable MathData definition_data_;
+	///
 	mutable size_t numargs_ = 0;
 	///
 	mutable docstring display_;