pdfua/textflow_pdfua1
Create Tagged PDF containing a Textflow with appropriate structure elements on several pages.
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/*
* Tagged PDF with Textflow:
* Create a Tagged PDF containing a Textflow with appropriate structure elements
* on several pages
*
* Using begin/end_item() and abbreviated Tagging, define a nested Tagged
* PDF structure with a single structure element containing a Textflow spread
* over several pages.
*
* Required software: PDFlib/PDFlib+PDI/PPS 10
* Required data: font file
*/
package com.pdflib.cookbook.pdflib.pdfua;
import com.pdflib.pdflib;
import com.pdflib.PDFlibException;
public class textflow_pdfua1 {
public static void main(String argv[]) {
/* This is where the data files are. Adjust as necessary. */
String searchpath = "../input";
String outfile = "textflow_pdfua1.pdf";
String title = "Tagged PDF with Textflow";
pdflib p = null;
int tf1 = -1, tf2 = -1, font;
String result;
final double llx = 50, lly = 50, urx = 400, ury = 400;
final int width = 450, height = 450;
int id_sect, id_p;
int exitcode = 0;
final String optlist = "fontname=NotoSerif-Regular fontsize=14 leading=125% "
+ "fillcolor={gray 0} charref alignment=justify";
/*
* Text placed on one or more pages. Soft hyphens are marked with the
* character reference "­" (character references are enabled by the
* charref option).
*/
final String text1 =
"Our paper planes are the ideal way of passing the time. We offer "
+ "revolutionary new develop­ments of the traditional common paper "
+ "planes. If your lesson, conference, or lecture turn out to be "
+ "deadly boring, you can have a wonderful time with our planes.\n\n"
+ "All our models are fol­ded from one paper sheet. They are "
+ "exclu­sively folded with­out using any adhesive. Several "
+ "models are equipped with a folded landing gear enabling a safe "
+ "landing on the intended loca­tion provided that you have aimed "
+ "well. Other models are able to fly loops or cover long distances. "
+ "Let them start from a vista point in the mountains and see where "
+ "they touch the ground.\n\n"
+ "Have a look at our new paper plane models!\n\n"
+ "Long Distance Glider\nWith this paper rocket you can send all your "
+ "messages even when sitting in a hall or in the cinema pretty near "
+ "the back.\n\nGiant Wing\nAn unbelievable sailplane! It is amazingly "
+ "robust and can even do aerobatics. But it best suited to gliding."
+ "\n\nCone Head Rocket\nThis paper arrow can be thrown with big "
+ "swing. We launched it from the roof of a hotel. It stayed in the "
+ "air a long time and covered a considerable distance.\n\n"
+ "Super Dart\nThe super dart can fly giant loops with a radius of 4 or"
+ " 5 meters and cover very long distances. Its heavy cone point is "
+ "slightly bowed upwards to get the lift required for loops.\n\n";
final String text2 =
"To fold the famous rocket looper proceed as follows:\n\n"
+ "Take an A4 sheet. Fold it lengthwise in the middle. Then, fold the "
+ "upper corners down. Fold the long sides inwards that the points A "
+ "and B meet on the central fold. Fold the points C and D that the "
+ "upper corners meet with the central fold as well. Fold the plane in "
+ "the middle. Fold the wings down that they close with the lower "
+ "border of the plane.";
try {
p = new pdflib();
p.set_option("SearchPath=" + searchpath);
/* This means we must check return values of load_font() etc. */
p.set_option("errorpolicy=return");
/*
* Open the document. "tagged=true" opens the document in Tagged PDF
* mode. "lang=en" indicated the predominant document language as
* English.
*/
if (p.begin_document(outfile, "pdfua=PDF/UA-1 lang=en "
+ "tag={tagname=Document Title={Flyer}}") == -1)
throw new Exception("Error: " + p.get_errmsg());
p.set_info("Creator", "PDFlib Cookbook");
p.set_info("Title", title);
/* Load the font */
font = p.load_font("NotoSerif-Regular", "unicode", "");
if (font == -1)
throw new Exception("Error: " + p.get_errmsg());
/* Force automatic word breaks */
p.set_option("autospace=true");
/* Feed the first text to the first Textflow object */
tf1 = p.add_textflow(tf1, text1, optlist);
if (tf1 == -1)
throw new Exception("Error: " + p.get_errmsg());
/* Feed the second text to the second Textflow object */
tf2 = p.add_textflow(tf2, text2, optlist);
if (tf2 == -1)
throw new Exception("Error: " + p.get_errmsg());
/* Start the first page */
p.begin_page_ext(width, height, "");
/*
* Open a structure element of type "Section" for all text contents
* to be included.
*/
id_sect = p.begin_item("Sect", "Title = {Topic}");
/* Open a structure element of type "H1" */
p.setfont(font, 20);
p.fit_textline("Our Paper Planes", llx, ury + 20,
"tag={tagname=H1 Title = {Intro}}");
/* Create a bookmark for the header */
p.create_bookmark("Our Paper Planes", "");
/*
* Open a structure element of type "P" for the first Textflow to be
* included. All parts of the Textflow, i.e. all calls to
* PDF_fit_textflow() with the specific Textflow handle, should be
* contained in a single structure element.
*/
id_p = p.begin_item("P", "Title = {Description}");
/*
* Loop until all of the text is placed; create new pages as long as
* more text needs to be placed.
*/
do {
result = p.fit_textflow(tf1, llx, lly, urx, ury,
"linespreadlimit=140%");
p.end_page_ext("");
/* Start a new page */
p.begin_page_ext(width, height, "");
}
while (result.equals("_boxfull") || result.equals("_nextpage"));
/* Fit the second Textflow */
result = p.fit_textflow(tf2, llx, lly, urx, ury,
"linespreadlimit=140%");
/* Close the structure element of type "P" */
p.end_item(id_p);
p.fit_textline("Read more ...", llx, lly - 20,
"tag={tagname=P} fontsize=20 font=" + font);
p.end_page_ext("");
/* Close the structure element of type "Section" */
p.end_item(id_sect);
/* Check for errors */
if (!result.equals("_stop")) {
/*
* "_boxempty" happens if the box is very small and doesn't hold
* any text at all.
*/
if (result.equals("_boxempty"))
throw new Exception("Error: Textflow box too small");
else {
/*
* Any other return value is a user exit caused by the
* "return" option; this requires dedicated code to deal
* with.
*/
throw new Exception("User return '" + result
+ "' found in Textflow");
}
}
p.delete_textflow(tf1);
p.delete_textflow(tf2);
p.end_document("");
}
catch (PDFlibException e) {
System.err.println("PDFlib exception occurred:");
System.err.println("[" + e.get_errnum() + "] " + e.get_apiname() +
": " + e.get_errmsg());
exitcode = 1;
}
catch (Exception e) {
System.err.println(e);
exitcode = 1;
}
finally {
if (p != null) {
p.delete();
}
System.exit(exitcode);
}
}
}