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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.Drawing;
using PdfSharp.Internal;
namespace PdfSharp.Pdf.Advanced
{
/// <summary>
/// Contains all used images of a document.
/// </summary>
internal sealed class PdfImageTable : PdfResourceTable
{
/// <summary>
/// Initializes a new instance of this class, which is a singleton for each document.
/// </summary>
public PdfImageTable(PdfDocument document)
: base(document)
{
}
/// <summary>
/// Gets a PdfImage from an XImage. If no PdfImage already exists, a new one is created.
/// </summary>
public PdfImage GetImage(XImage image)
{
PdfImageTable.ImageSelector selector = image.selector;
if (selector == null)
{
selector = new ImageSelector(image);
image.selector = selector;
}
PdfImage pdfImage = this.images[selector] as PdfImage;
if (pdfImage == null)
{
pdfImage = new PdfImage(this.owner, image);
//pdfImage.Document = this.document;
Debug.Assert(pdfImage.Owner == this.owner);
this.images[selector] = pdfImage;
//if (this.document.EarlyWrite)
//{
// //pdfFont.Close(); delete
// //pdfFont.AssignObjID(ref this.document.ObjectID); // BUG just test code!!!!
// //pdfFont.WriteObject(null);
//}
}
return pdfImage;
}
/// <summary>
/// Map from ImageSelector to PdfImage.
/// </summary>
Hashtable images = new Hashtable();
/// <summary>
/// A collection of information that uniquely idendifies a particular PdfImage.
/// </summary>
public class ImageSelector
{
/// <summary>
/// Initializes a new instance of ImageSelector from an XImage.
/// </summary>
public ImageSelector(XImage image)
{
// HACK: implement a way to identify images when they are reused
if (image.path == null)
image.path = Guid.NewGuid().ToString();
// HACK: just use full path to identify
this.path = image.path.ToLower(CultureInfo.InvariantCulture);
}
public string Path
{
get { return this.path; }
set { this.path = value; }
}
string path;
public override bool Equals(object obj)
{
ImageSelector selector = obj as ImageSelector;
if (obj == null)
return false;
return this.path == selector.path; ;
}
public override int GetHashCode()
{
return this.path.GetHashCode();
}
}
}
}
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