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// This module implements the QextScintillaDocument class.
//
// Copyright (c) 2006
// Riverbank Computing Limited <info@riverbankcomputing.co.uk>
//
// This file is part of TQScintilla.
//
// This copy of TQScintilla is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option) any
// later version.
//
// TQScintilla is supplied in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
// details.
//
// You should have received a copy of the GNU General Public License along with
// TQScintilla; see the file LICENSE. If not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "tqextscintilladocument.h"
#include "tqextscintillabase.h"
// This internal class encapsulates the underlying document and is shared by
// QextScintillaDocument instances.
class QextScintillaDocumentP
{
public:
QextScintillaDocumentP() : doc(0), nr_displays(0), nr_attaches(1) {}
long doc; // The Scintilla document.
int nr_displays; // The number of displays.
int nr_attaches; // The number of attaches.
};
// The ctor.
QextScintillaDocument::QextScintillaDocument()
{
pdoc = new QextScintillaDocumentP();
}
// The dtor.
QextScintillaDocument::~QextScintillaDocument()
{
detach();
}
// The copy ctor.
QextScintillaDocument::QextScintillaDocument(const QextScintillaDocument &that)
{
attach(that);
}
// The assignment operator.
QextScintillaDocument &QextScintillaDocument::operator=(const QextScintillaDocument &that)
{
if (pdoc != that.pdoc)
{
detach();
attach(that);
}
return *this;
}
// Attach an existing document to this one.
void QextScintillaDocument::attach(const QextScintillaDocument &that)
{
++that.pdoc -> nr_attaches;
pdoc = that.pdoc;
}
// Detach the underlying document.
void QextScintillaDocument::detach()
{
if (!pdoc)
return;
if (--pdoc -> nr_attaches == 0)
{
if (pdoc -> doc && pdoc -> nr_displays == 0)
{
QextScintillaBase *qsb = QextScintillaBase::pool();
// Release the explicit reference to the document. If
// the pool is empty then we just accept the memory
// leak.
if (qsb)
qsb -> SendScintilla(QextScintillaBase::SCI_RELEASEDOCUMENT,0,pdoc -> doc);
}
delete pdoc;
}
pdoc = 0;
}
// Undisplay and detach the underlying document.
void QextScintillaDocument::undisplay(QextScintillaBase *qsb)
{
if (--pdoc -> nr_attaches == 0)
delete pdoc;
else if (--pdoc -> nr_displays == 0)
{
// Create an explicit reference to the document to keep it
// alive.
qsb -> SendScintilla(QextScintillaBase::SCI_ADDREFDOCUMENT,0,pdoc -> doc);
}
pdoc = 0;
}
// Display the underlying document.
void QextScintillaDocument::display(QextScintillaBase *qsb,const QextScintillaDocument *from)
{
long ndoc;
if (from)
{
ndoc = from -> pdoc -> doc;
qsb -> SendScintilla(QextScintillaBase::SCI_SETDOCPOINTER,0,ndoc);
}
else
ndoc = qsb -> SendScintilla(QextScintillaBase::SCI_GETDOCPOINTER);
pdoc -> doc = ndoc;
++pdoc -> nr_displays;
}
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