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/*
* $Id$
* Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
* For details on use and redistribution please refer to the
* LICENSE file included with these sources.
*/
package org.apache.fop.pdf;
// Java
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
/**
* class representing a /Resources object.
*
* /Resources object contain a list of references to the fonts for the
* document
*/
public class PDFResources extends PDFObject {
/**
* /Font objects keyed by their internal name
*/
protected HashMap fonts = new HashMap();
protected HashSet xObjects = new HashSet();
protected HashSet patterns = new HashSet();
protected HashSet shadings = new HashSet();
protected HashSet gstates = new HashSet();
/**
* create a /Resources object.
*
* @param number the object's number
*/
public PDFResources(int number) {
/* generic creation of object */
super(number);
}
/**
* add font object to resources list.
*
* @param font the PDFFont to add
*/
public void addFont(PDFFont font) {
this.fonts.put(font.getName(), font);
}
public void addGState(PDFGState gs) {
this.gstates.add(gs);
}
public void addShading(PDFShading theShading) {
this.shadings.add(theShading);
}
public void addPattern(PDFPattern thePattern) {
this.patterns.add(thePattern);
}
public void addXObject(PDFXObject xObject) {
this.xObjects.add(xObject);
}
/**
* represent the object in PDF
*
* @return the PDF
*/
public byte[] toPDF() {
StringBuffer p = new StringBuffer(this.number + " " + this.generation
+ " obj\n<< \n");
if (!this.fonts.isEmpty()) {
p.append("/Font << ");
/* construct PDF dictionary of font object references */
Iterator fontIterator = this.fonts.keySet().iterator();
while (fontIterator.hasNext()) {
String fontName = (String)fontIterator.next();
p.append("/" + fontName + " "
+ ((PDFFont)this.fonts.get(fontName)).referencePDF()
+ " ");
}
p.append(">> \n");
}
PDFShading currentShading = null;
if (!this.shadings.isEmpty()) {
p.append("/Shading << ");
for (Iterator iter = shadings.iterator(); iter.hasNext(); ) {
currentShading = (PDFShading)iter.next();
p.append("/" + currentShading.getName() + " "
+ currentShading.referencePDF() + " "); // \n ??????
}
p.append(">>\n");
}
// "free" the memory. Sorta.
currentShading = null;
PDFPattern currentPattern = null;
if (!this.patterns.isEmpty()) {
p.append("/Pattern << ");
for (Iterator iter = patterns.iterator(); iter.hasNext(); ) {
currentPattern = (PDFPattern)iter.next();
p.append("/" + currentPattern.getName() + " "
+ currentPattern.referencePDF() + " ");
}
p.append(">> \n");
}
// "free" the memory. Sorta.
currentPattern = null;
p.append("/ProcSet [ /PDF /ImageC /Text ]\n");
if (this.xObjects != null && !this.xObjects.isEmpty()) {
p = p.append("/XObject <<");
for (Iterator iter = xObjects.iterator(); iter.hasNext(); ) {
PDFXObject xobj = (PDFXObject)iter.next();
p = p.append("/Im" + xobj.getXNumber() + " "
+ xobj.referencePDF()
+ "\n");
}
p = p.append(" >>\n");
}
if (!this.gstates.isEmpty()) {
p = p.append("/ExtGState <<");
for (Iterator iter = gstates.iterator(); iter.hasNext(); ) {
PDFGState gs = (PDFGState)iter.next();
p = p.append("/" + gs.getName() + " "
+ gs.referencePDF()
+ " ");
}
p = p.append(">>\n");
}
p = p.append(">>\nendobj\n");
return p.toString().getBytes();
}
}
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