introduce test for "equality"

remove a few unneeded declarations


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3036 a592a061-630c-0410-9148-cb99ea01b6c8

src/mathed/math_cursor.h

@@ -25,19 +25,9 @@
 #include "math_inset.h"
 #include "LString.h"
 
-class MathInset;
-class MathAtom;
-class MathGridInset;
-class MathFuncInset;
-class MathHullInset;
-class MathScriptInset;
-class MathSpaceInset;
 class InsetFormulaBase;
-class MathArray;
-class MathXArray;
 class Painter;
 class Selection;
-class latexkeys;
 
 /// Description of a position 
 struct MathCursorPos {

src/mathed/math_data.C

@@ -204,3 +204,14 @@ MathArray::iterator MathArray::end()
 {
 	return bf_.end();
 }
+
+
+bool MathArray::match(MathArray const & ar) const
+{
+	if (size() != ar.size())
+		return false;
+	for (const_iterator it = begin(), jt = ar.begin(); it != end(); ++it, ++jt)
+		if (!it->nucleus()->match(jt->nucleus()))
+			return false;
+	return true;
+}

src/mathed/math_data.h

@@ -19,9 +19,7 @@
 #include <vector>
 
 #include "math_atom.h"
-#include "LString.h"
 
-class MathScriptInset;
 class MathMacro;
 class LaTeXFeatures;
 
@@ -104,6 +102,8 @@ public:
 	void dump2() const;
 	///
 	void substitute(MathMacro const &);
+	///
+	bool match(MathArray const &) const;
 
 	///
 	MathAtom & at(size_type pos);

src/mathed/math_inset.h

@@ -229,6 +229,8 @@ public:
 	virtual void validate(LaTeXFeatures & features) const;
 	///
 	virtual void handleFont(MathTextCodes) {}
+	///
+	virtual bool match(MathInset *) const { return false; }
 
 	/// write normalized content
 	virtual void normalize(NormalStream &) const;

src/mathed/math_nestinset.C

@@ -178,3 +178,14 @@ bool MathNestInset::covers(int x, int y) const
 	}
 	return x >= x0 && x <= x1 && y >= y0 && y <= y1;
 }
+
+
+bool MathNestInset::match(MathInset * p) const
+{
+	if (nargs() != p->nargs())
+		return false;
+	for (idx_type i = 0; i < nargs(); ++i)
+		if (!cell(i).match(p->cell(i)))
+			return false;
+	return true;
+}

src/mathed/math_nestinset.h

@@ -65,6 +65,8 @@ public:
 	void push_back(MathAtom const &);
 	///
 	void dump() const;
+	///
+	bool match(MathInset *) const;
 
 	///
 	void validate(LaTeXFeatures & features) const;