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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.pdf;
/**
* Class representing a /Page object.
* <p>
* 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.
*/
public class PDFPage extends PDFResourceContext {
/**
* Holds a reference on the parent PDFPages object.
*/
private String parentRef;
/**
* 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;
/** the page index (zero-based) */
protected int pageIndex;
/**
* Duration to display page
*/
protected int duration = -1;
/**
* Transition dictionary
*/
protected TransitionDictionary trDictionary = null;
/**
* Create a /Page object
*
* @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
* @param pageIndex the page's zero-based index (or -1 if the page number is auto-determined)
*/
public PDFPage(PDFResources resources, PDFStream contents,
int pageWidth, int pageHeight, int pageIndex) {
/* generic creation of object */
super(resources);
/* set fields using parameters */
this.contents = contents;
this.pagewidth = pageWidth;
this.pageheight = pageHeight;
this.pageIndex = pageIndex;
}
/**
* Create a /Page object
*
* @param resources the /Resources object
* @param pageWidth the page's width in points
* @param pageHeight the page's height in points
* @param pageIndex the page's zero-based index (or -1 if the page number is auto-determined)
*/
public PDFPage(PDFResources resources,
int pageWidth, int pageHeight, int pageIndex) {
this(resources, null, pageWidth, pageHeight, pageIndex);
}
/**
* 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.parentRef = parent.referencePDF();
}
/**
* Set the transition dictionary and duration.
* This sets the duration of the page and the transition
* dictionary used when going to the next page.
*
* @param dur the duration in seconds
* @param tr the transition dictionary
*/
public void setTransition(int dur, TransitionDictionary tr) {
duration = dur;
trDictionary = tr;
}
/**
* Returns the page width.
* @return the page width
*/
public int getWidth() {
return this.pagewidth;
}
/**
* Returns the page height.
* @return the page height
*/
public int getHeight() {
return this.pageheight;
}
/**
* @return the page Index of this page (zero-based), -1 if it the page index should
* automatically be determined.
*/
public int getPageIndex() {
return this.pageIndex;
}
/**
* @see org.apache.fop.pdf.PDFObject#toPDFString()
*/
public String toPDFString() {
StringBuffer sb = new StringBuffer();
String box = "[ 0 0 " + getWidth() + " " + getHeight() + " ]";
sb = sb.append(getObjectID()
+ "<< /Type /Page\n"
+ "/Parent " + this.parentRef + "\n"
+ "/MediaBox " + box + "\n"
+ "/TrimBox " + box + "\n" //Needed for PDF/X
+ "/BleedBox " + box + "\n" //Recommended by PDF/X
+ "/Resources " + this.resources.referencePDF() + "\n"
+ "/Contents " + this.contents.referencePDF() + "\n");
if (this.annotList != null) {
sb = sb.append("/Annots " + this.annotList.referencePDF() + "\n");
}
if (this.duration != -1) {
sb = sb.append("/Dur " + this.duration + "\n");
}
if (this.trDictionary != null) {
sb = sb.append("/Trans << " + this.trDictionary.getDictionary() + " >>\n");
}
sb = sb.append(">>\nendobj\n");
return sb.toString();
}
}
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