/* $Id: tagged_pdf_with_textflow.java,v 1.12 2010/01/26 07:58:48 stm Exp $ * Tagged PDF with Textflow: * Create a Tagged PDF containing a Textflow with appropriate structure elements * over several pages * * Using begin_item(), activate_item() and end_item(), define a nested Tagged * PDF structure with a single structure element containing a Textflow spread * over several pages. * * Required software: PDFlib/PDFlib+PDI/PPS 7.0.3 * The basic code also works with PDFlib/PDFlib+PDI/PPS 7.0.0-7.0.2, but these * versions require the "lang" option in begin_document() or end_document(). * Required data: none */ package com.pdflib.cookbook.pdflib.interchange; import com.pdflib.pdflib; import com.pdflib.PDFlibException; public class tagged_pdf_with_textflow { public static void main (String argv[]) { String outfile = "tagged_pdf_with_textflow.pdf"; String title = "Tagged PDF with Textflow"; pdflib p = null; /* Required minimum PDFlib version */ final double requiredversion = 703; final String requiredvstr = "7.0.3"; 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_art, id_sect, id_h1, id_p; final String optlist = "fontname=Helvetica fontsize=14 encoding=unicode " + "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(); /* This means we must check return values of load_font() etc. */ p.set_parameter("errorpolicy", "return"); /* Check whether the required minimum PDFlib version is available */ double major = p.get_value("major", 0); double minor = p.get_value("minor", 0); double revision = p.get_value("revision", 0); if (major*100 + minor*10 + revision < requiredversion) throw new Exception("Error: PDFlib " + requiredvstr + " or above is required"); /* Open the document. * "tagged=true" opens the document in Tagged PDF mode. * "lang=en" indicated the predominant document language as English. * "openmode=tagged" */ if (p.begin_document(outfile, "tagged=true lang=EN") == -1) throw new Exception("Error: " + p.get_errmsg()); p.set_info("Creator", "PDFlib Cookbook"); p.set_info("Title", title + " $Revision: 1.12 $"); /* Load the font */ font = p.load_font("Helvetica-Bold", "unicode", ""); if (font == -1) throw new Exception("Error: " + p.get_errmsg()); /* Force automatic word breaks */ p.set_parameter("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()); /* Open a structure element of type "Article" */ id_art = p.begin_item("Art", "Title = {Flyer}"); /* 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" */ id_h1 = p.begin_item("H1", "Title = {Intro}"); p.setfont(font, 20); p.fit_textline("Our Paper Planes", llx, ury + 20, ""); /* Close the structure element of type "H1" */ p.end_item(id_h1); /* 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.setfont(font, 20); p.fit_textline("Read more ...", llx, lly - 20, ""); 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); /* Close the structure element of type "Article" */ p.end_item(id_art); p.end_document(""); } catch (PDFlibException e) { System.err.print("PDFlib exception occurred:\n"); System.err.print("[" + e.get_errnum() + "] " + e.get_apiname() + ": " + e.get_errmsg() + "\n"); } catch (Exception e) { System.err.println(e.getMessage()); } finally { if (p != null) { p.delete(); } } } }