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dcd8fb0428
invalidation if the paragraphlist is changed. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@7883 a592a061-630c-0410-9148-cb99ea01b6c8
103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
// -*- C++ -*-
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/**
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* \file lyxcursor.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 LYXCURSOR_H
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#define LYXCURSOR_H
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#include "support/types.h"
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/**
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* The cursor class describes the position of a cursor within a document.
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* Several cursors exist within LyX; for example, when locking an inset,
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* the position of the cursor in the containing inset is stored.
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*
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* FIXME: true ?
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*/
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class LyXCursor {
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public:
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LyXCursor();
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/// set the paragraph that contains this cursor
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void par(lyx::paroffset_type pit);
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/// return the paragraph this cursor is in
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lyx::paroffset_type par() const;
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/// set the position within the paragraph
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void pos(lyx::pos_type p);
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/// return the position within the paragraph
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lyx::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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/// set the x position in pixels
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void x(int i);
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/// return the x position in pixels
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int x() const;
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/// set the cached x position
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void x_fix(int i);
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/**
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* Return the cached x position of the cursor. This is used for when
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* we have text like :
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*
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* blah blah blah blah| blah blah blah
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* blah blah blah
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* blah blah blah blah blah blah
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*
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* When we move onto row 3, we would like to be vertically aligned
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* with where we were in row 1, despite the fact that row 2 is
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* shorter than x()
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*/
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int x_fix() const;
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/// set the y position in pixels
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void y(int i);
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/// return the y position in pixels
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int y() const;
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private:
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/// The paragraph the cursor is in.
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lyx::paroffset_type par_;
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/// The position inside the paragraph
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lyx::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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/// the pixel x position
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int x_;
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/// the cached x position
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int x_fix_;
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/// the pixel y position
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int y_;
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};
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///
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bool operator==(LyXCursor const & a, LyXCursor const & b);
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///
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bool operator!=(LyXCursor const & a, LyXCursor const & b);
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#endif // LYXCURSOR_H
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