package com.pdflib.cookbook.pcos.special; import com.pdflib.IpCOS; import com.pdflib.cookbook.pcos.pcos_cookbook_example; /** * Create a list of all layers contained in a PDF document and show their names. *
* This topic will catch all layers (even those which are not presented in * Acrobat's user interface), but it will not reflect the default layer * hierarchy, and will not show text labels which can separate layer names. *
* Required software: pCOS interface 3 (pCOS 3.x, PDFlib+PDI/PPS 7.x, TET 2.2,
* PLOP 3.x)
* Required data: PDF document
*
* @version $Id: layers.java,v 1.9 2015/11/16 11:53:16 stm Exp $
*/
public class layers extends pcos_cookbook_example {
/* This is where the data files are. Adjust as necessary. */
private final static String SEARCH_PATH = "../input";
private final static String KEY = "/Root/OCProperties";
public void example_code(IpCOS p, int doc) throws Exception {
System.out.println("File name: " + p.pcos_get_string(doc, "filename"));
String objtype = p.pcos_get_string(doc, "type:" + KEY);
if (!objtype.equals("dict")) {
System.out.println("No layers found\n");
return;
}
objtype = p.pcos_get_string(doc, "type:" + KEY + "/OCGs");
if (!objtype.equals("array")) {
System.out.println("PDF error in OCProperties dict");
return;
}
int numentries = (int) p
.pcos_get_number(doc, "length:" + KEY + "/OCGs");
for (int i = 0; i < numentries; i++) {
String key = KEY + "/OCGs[" + i + "]/Name";
objtype = p.pcos_get_string(doc, "type:" + key);
if (!objtype.equals("null")) {
System.out.println(p.pcos_get_string(doc, key));
}
}
}
public layers(String[] argv, String readable_name, String search_path,
String full_rcs_file_name, String revision) {
super(argv, readable_name, search_path, full_rcs_file_name, revision);
}
public static void main(String argv[]) {
layers example = new layers(argv, "Layer names", SEARCH_PATH,
"$RCSfile: layers.java,v $", "$Revision: 1.9 $");
example.execute();
}
}