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