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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@8337 a592a061-630c-0410-9148-cb99ea01b6c8
127 lines
3.3 KiB
C++
127 lines
3.3 KiB
C++
// -*- C++ -*-
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/**
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* \file cursor_slice.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Lars Gullik Bjønnes
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* \author Matthias Ettrich
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* \author John Levon
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* \author André Pönitz
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* \author Dekel Tsur
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* \author Jürgen Vigna
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef CURSORSLICE_H
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#define CURSORSLICE_H
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#include <iosfwd>
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#include <cstddef>
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#include "support/types.h"
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class InsetBase;
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class UpdatableInset;
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class MathInset;
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class LyXText;
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class MathArray;
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/// This encapsulates a single slice of a document iterator as used e.g.
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/// for cursors.
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// After IU, the distinction of MathInset and UpdatableInset as well as
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// that of MathArray and LyXText should vanish. They are conceptually the
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// same (now...)
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class CursorSlice {
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public:
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/// type for cell number in inset
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typedef size_t idx_type;
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/// type for paragraph numbers positions within a cell
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typedef lyx::paroffset_type par_type;
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/// type for cursor positions within a cell
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typedef lyx::pos_type pos_type;
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///
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CursorSlice();
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///
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explicit CursorSlice(InsetBase *);
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/// set the paragraph that contains this cursor
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void par(par_type pit);
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/// return the paragraph this cursor is in
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par_type par() const;
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/// set the position within the paragraph
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void pos(pos_type p);
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/// return the position within the paragraph
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pos_type pos() const;
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/// FIXME
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void boundary(bool b);
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/// FIXME
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bool boundary() const;
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///
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/// texted specific stuff
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///
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///
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LyXText * text() const;
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///
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UpdatableInset * asUpdatableInset() const;
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///
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/// mathed specific stuff
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///
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/// returns cell corresponding to this position
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MathArray & cell() const;
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/// returns cell corresponding to this position
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MathArray & cell(idx_type idx) const;
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/// gets screen position of the thing
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void getPos(int & x, int & y) const;
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/// set position
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void setPos(int pos);
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///
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MathInset * asMathInset() const;
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///
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friend std::ostream & operator<<(std::ostream &, CursorSlice const &);
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public:
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/// pointer to an inset
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InsetBase * inset_;
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/// cell index of a position in this inset
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idx_type idx_;
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/// paragraph in this cell (used by texted)
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par_type par_;
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/// position in this cell
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pos_type pos_;
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/**
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* When the cursor position is i, is the cursor is after the i-th char
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* or before the i+1-th char ? Normally, these two interpretations are
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* equivalent, except when the fonts of the i-th and i+1-th char
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* differ.
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* We use boundary_ to distinguish between the two options:
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* If boundary_=true, then the cursor is after the i-th char
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* and if boundary_=false, then the cursor is before the i+1-th char.
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*
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* We currently use the boundary only when the language direction of
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* the i-th char is different than the one of the i+1-th char.
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* In this case it is important to distinguish between the two
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* cursor interpretations, in order to give a reasonable behavior to
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* the user.
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*/
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bool boundary_;
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};
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/// test for equality
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bool operator==(CursorSlice const &, CursorSlice const &);
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/// test for inequality
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bool operator!=(CursorSlice const &, CursorSlice const &);
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/// test for order
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bool operator<(CursorSlice const &, CursorSlice const &);
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/// test for order
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bool operator>(CursorSlice const &, CursorSlice const &);
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#endif
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