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#region PDFsharp - A .NET library for processing PDF
//
// Authors:
// Stefan Lange (mailto:Stefan.Lange@pdfsharp.com)
//
// Copyright (c) 2005-2008 empira Software GmbH, Cologne (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
#endregion
using System;
using System.Diagnostics;
using System.Collections;
using System.Globalization;
using System.Text;
using System.IO;
using PdfSharp.Internal;
using PdfSharp.Pdf;
using PdfSharp.Pdf.Advanced;
using PdfSharp.Pdf.IO;
namespace PdfSharp.Pdf.Internal
{
/// <summary>
/// Provides a thread-local cache for large objects.
/// </summary>
internal class GlobalObjectTable
{
public GlobalObjectTable()
{
}
public void AttatchDocument(PdfDocument.DocumentHandle handle)
{
lock (this.documentHandles)
{
this.documentHandles.Add(handle);
}
//WeakReference weakRef = new WeakReference(document);
//lock (this.documents)
//{
// this.documents.Add(weakRef);
//}
}
public void DetatchDocument(PdfDocument.DocumentHandle handle)
{
lock (this.documentHandles)
{
// Notify other documents about detach
int count = this.documentHandles.Count;
for (int idx = 0; idx < count; idx++)
{
if (((PdfDocument.DocumentHandle)this.documentHandles[idx]).IsAlive)
{
PdfDocument target = ((PdfDocument.DocumentHandle)this.documentHandles[idx]).Target;
if (target != null)
target.OnExternalDocumentFinalized(handle);
}
}
// Clean up table
for (int idx = 0; idx < this.documentHandles.Count; idx++)
{
PdfDocument target = ((PdfDocument.DocumentHandle)this.documentHandles[idx]).Target;
if (target == null)
{
this.documentHandles.RemoveAt(idx);
idx--;
}
}
}
//lock (this.documents)
//{
// int index = IndexOf(document);
// if (index != -1)
// {
// this.documents.RemoveAt(index);
// int count = this.documents.Count;
// for (int idx = 0; idx < count; idx++)
// {
// PdfDocument target = ((WeakReference)this.documents[idx]).Target as PdfDocument;
// if (target != null)
// target.OnExternalDocumentFinalized(document);
// }
// for (int idx = 0; idx < this.documents.Count; idx++)
// {
// PdfDocument target = ((WeakReference)this.documents[idx]).Target as PdfDocument;
// if (target == null)
// {
// this.documents.RemoveAt(idx);
// idx--;
// }
// }
// }
//}
}
//int IndexOf(PdfDocument.Handle handle)
//{
// int count = this.documents.Count;
// for (int idx = 0; idx < count; idx++)
// {
// if ((PdfDocument.Handle)this.documents[idx] == handle)
// return idx;
// //if (Object.ReferenceEquals(((WeakReference)this.documents[idx]).Target, document))
// // return idx;
// }
// return -1;
//}
/// <summary>
/// Array of handles to all documents.
/// </summary>
ArrayList documentHandles = new ArrayList();
}
}
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