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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-30 11:36:13 -0600
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-30 11:36:13 -0600
commit664e37abfe5c796c1279b8295fb030f126b0a7d8 (patch)
tree85f4e661e5c615f01ee1cdf51ca1250b96efe315 /qt/qextscintilladocument.cpp
downloadtqscintilla-664e37abfe5c796c1279b8295fb030f126b0a7d8.tar.gz
tqscintilla-664e37abfe5c796c1279b8295fb030f126b0a7d8.zip
Initial import of qscintilla from 2007
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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 QScintilla.
+//
+// This copy of QScintilla 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.
+//
+// QScintilla 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
+// QScintilla; see the file LICENSE. If not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+
+#include "qextscintilladocument.h"
+#include "qextscintillabase.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;
+}