lyx_mirror/src/mathed/math_atom.h

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// -*- C++ -*-
/**
* \file math_atom.h
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Andr<EFBFBD> P<EFBFBD>nitz
*
* Full author contact details are available in file CREDITS.
*/
#ifndef MATH_ATOM_H
#define MATH_ATOM_H
/**
Wrapper for MathInset * with copy-semantics
--
The 'atom' is the major blob in math typesetting. And 'atom' consists
of a nucleus, an optional superscript, and an optional subscript.
Exactly where the subscript and superscript are drawn depends on the
size, and type, of the nucleus they are attached to.
Jules
--
Ok: Implementing it thusly is not feasible since cursor movement gets
hackish. We use MathAtom only as a wrapper around MathInset * with value
semantics.
The MathAtom owns the MathInset * and is responsible for proper cloning and
destruction. Every MathInset * should be put into a MathAtom after its
creation as soon as possible.
Andre'
*/
class InsetBase;
class MathInset;
class MathAtom {
public:
/// default constructor, object is useless, but we need it to put it into
// std::containers
MathAtom();
/// the "real constructor"
explicit MathAtom(InsetBase * p);
/// copy constructor, invokes nucleus_->clone()
MathAtom(MathAtom const &);
/// we really need to clean up
~MathAtom();
/// assignment invokes nucleus_->clone()
MathAtom & operator=(MathAtom const &);
/// access to the inset (checked with gprof)
MathInset * nucleus() { return nucleus_; }
MathInset const * nucleus() const { return nucleus_; }
/// access to the inset
MathInset const * operator->() const { return nucleus_; }
/// width cache. Not nice...
//mutable int width_;
private:
///
MathInset * nucleus_;
};
#endif