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// This module implements the QsciDocument class.
//
// Copyright (c) 2010 Riverbank Computing Limited <info@riverbankcomputing.com>
//
// This file is part of QScintilla.
//
// This file may be used under the terms of the GNU General Public
// License versions 2.0 or 3.0 as published by the Free Software
// Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
// included in the packaging of this file. Alternatively you may (at
// your option) use any later version of the GNU General Public
// License if such license has been publicly approved by Riverbank
// Computing Limited (or its successors, if any) and the KDE Free Qt
// Foundation. In addition, as a special exception, Riverbank gives you
// certain additional rights. These rights are described in the Riverbank
// GPL Exception version 1.1, which can be found in the file
// GPL_EXCEPTION.txt in this package.
//
// Please review the following information to ensure GNU General
// Public Licensing requirements will be met:
// http://trolltech.com/products/qt/licenses/licensing/opensource/. If
// you are unsure which license is appropriate for your use, please
// review the following information:
// http://trolltech.com/products/qt/licenses/licensing/licensingoverview
// or contact the sales department at sales@riverbankcomputing.com.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#include "Qsci/qscidocument.h"
#include "Qsci/qsciscintillabase.h"
// This internal class encapsulates the underlying document and is shared by
// QsciDocument instances.
class QsciDocumentP
{
public:
QsciDocumentP() : doc(0), nr_displays(0), nr_attaches(1), modified(false) {}
void *doc; // The Scintilla document.
int nr_displays; // The number of displays.
int nr_attaches; // The number of attaches.
bool modified; // Set if not at a save point.
};
// The ctor.
QsciDocument::QsciDocument()
{
pdoc = new QsciDocumentP();
}
// The dtor.
QsciDocument::~QsciDocument()
{
detach();
}
// The copy ctor.
QsciDocument::QsciDocument(const QsciDocument &that)
{
attach(that);
}
// The assignment operator.
QsciDocument &QsciDocument::operator=(const QsciDocument &that)
{
if (pdoc != that.pdoc)
{
detach();
attach(that);
}
return *this;
}
// Attach an existing document to this one.
void QsciDocument::attach(const QsciDocument &that)
{
++that.pdoc->nr_attaches;
pdoc = that.pdoc;
}
// Detach the underlying document.
void QsciDocument::detach()
{
if (!pdoc)
return;
if (--pdoc->nr_attaches == 0)
{
if (pdoc->doc && pdoc->nr_displays == 0)
{
QsciScintillaBase *qsb = QsciScintillaBase::pool();
// Release the explicit reference to the document. If the pool is
// empty then we just accept the memory leak.
if (qsb)
qsb->SendScintilla(QsciScintillaBase::SCI_RELEASEDOCUMENT, 0,
pdoc->doc);
}
delete pdoc;
}
pdoc = 0;
}
// Undisplay and detach the underlying document.
void QsciDocument::undisplay(QsciScintillaBase *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(QsciScintillaBase::SCI_ADDREFDOCUMENT, 0, pdoc->doc);
}
pdoc = 0;
}
// Display the underlying document.
void QsciDocument::display(QsciScintillaBase *qsb, const QsciDocument *from)
{
void *ndoc;
if (from)
{
ndoc = from->pdoc->doc;
qsb->SendScintilla(QsciScintillaBase::SCI_SETDOCPOINTER, 0, ndoc);
}
else
ndoc = qsb->SendScintillaPtrResult(QsciScintillaBase::SCI_GETDOCPOINTER);
pdoc->doc = ndoc;
++pdoc->nr_displays;
}
// Return the modified state of the document.
bool QsciDocument::isModified() const
{
return pdoc->modified;
}
// Set the modified state of the document.
void QsciDocument::setModified(bool m)
{
pdoc->modified = m;
}
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