Add a unique id to math insets

The id is just the memory address.

The status bar now spits out the math inset uid information when in a math cell
in DEVEL_VERSION, like it already does when in a paragraph.

This is preliminary work for extending the cursor<->row tracking to math.

src/Cursor.cpp

@@ -1179,8 +1179,6 @@ void Cursor::info(odocstream & os) const
 		if (inset)
 			prevInset()->infoize2(os);
 	}
-	// overwite old message
-	os << "                    ";
 }
 
 
@@ -2106,6 +2104,13 @@ docstring Cursor::currentState() const
 	if (inMathed()) {
 		odocstringstream os;
 		info(os);
+#ifdef DEVEL_VERSION
+		InsetMath * math = inset().asInsetMath();
+		if (math)
+			os << _(", Inset: ") << math->id();
+		os << _(", Cell: ") << idx();
+		os << _(", Position: ") << pos();
+#endif
 		return os.str();
 	}
 

src/TexRow.h

@@ -23,6 +23,8 @@ namespace lyx {
 class LyXErr;
 class DocIterator;
 
+typedef void const * uid_type;
+
 /// Represents the correspondence between paragraphs and the generated
 /// LaTeX file
 

src/mathed/InsetMath.h

@@ -17,6 +17,8 @@
 
 #include "insets/Inset.h"
 
+#include "TexRow.h"
+
 
 namespace lyx {
 
@@ -44,7 +46,7 @@ Abstract base class for all math objects.  A math insets is for use of the
 math editor only, it isn't a general LyX inset. It's used to represent all
 the math objects.
 
-Math insets do not know there parents, a cursor position or things
+Math insets do not know their parents, a cursor position or things
 like that. They are dumb objects that are contained in other math insets
 (InsetMathNests, in fact) thus forming a tree. The root of this tree is
 always a InsetMathHull, which provides an interface to the Outer World by
@@ -225,6 +227,8 @@ public:
 	bool isInToc() const { return true; }
 	///
 	InsetCode lyxCode() const { return MATH_CODE; }
+	///
+	uid_type id() const { return this; }
 };
 
 ///