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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;
/**
* class representing a /Page object.
*
* There is one of these for every page in a PDF document. The object
* specifies the dimensions of the page and references a /Resources
* object, a contents stream and the page's parent in the page
* hierarchy.
*
* Modified by Mark Lillywhite, mark-fop@inomial.com. The Parent
* object was being referred to by reference, but all that we
* ever used from the Parent was it's PDF object ID, and according
* to the memory profile this was causing OOM issues. So, we store
* only the object ID of the parent, rather than the parent itself.
*/
public class PDFPage extends PDFResourceContext {
/**
* the page's parent, a PDF reference object
*/
protected String parent;
/**
* the contents stream
*/
protected PDFStream contents;
/**
* the width of the page in points
*/
protected int pagewidth;
/**
* the height of the page in points
*/
protected int pageheight;
/**
* create a /Page object
*
* @param number the object's number
* @param resources the /Resources object
* @param contents the content stream
* @param pagewidth the page's width in points
* @param pageheight the page's height in points
*/
public PDFPage(PDFDocument doc, int number, PDFResources resources, PDFStream contents,
int pagewidth, int pageheight) {
/* generic creation of object */
super(number, doc, resources);
/* set fields using parameters */
this.contents = contents;
this.pagewidth = pagewidth;
this.pageheight = pageheight;
}
/**
* create a /Page object
*
* @param number the object's number
* @param resources the /Resources object
* @param pagewidth the page's width in points
* @param pageheight the page's height in points
*/
public PDFPage(PDFDocument doc, int number, PDFResources resources,
int pagewidth, int pageheight) {
/* generic creation of object */
super(number, doc, resources);
/* set fields using parameters */
this.pagewidth = pagewidth;
this.pageheight = pageheight;
}
/**
* set this page contents
*
* @param contents the contents of the page
*/
public void setContents(PDFStream contents) {
this.contents = contents;
}
/**
* set this page's parent
*
* @param parent the /Pages object that is this page's parent
*/
public void setParent(PDFPages parent) {
this.parent = parent.referencePDF();
}
/**
* represent this object as PDF
*
* @return the PDF string
*/
public byte[] toPDF() {
StringBuffer sb = new StringBuffer();
sb = sb.append(this.number + " " + this.generation + " obj\n"
+ "<< /Type /Page\n" + "/Parent "
+ this.parent + "\n"
+ "/MediaBox [ 0 0 " + this.pagewidth + " "
+ this.pageheight + " ]\n" + "/Resources "
+ this.resources.referencePDF() + "\n" + "/Contents "
+ this.contents.referencePDF() + "\n");
if (this.annotList != null) {
sb = sb.append("/Annots " + this.annotList.referencePDF() + "\n");
}
sb = sb.append(">>\nendobj\n");
return sb.toString().getBytes();
}
}
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