/*
 * Block below contents:
 * Fill PDFlib blocks so that they are placed below the imported page
 * 
 * Fill PDFlib blocks such that not the block contents are placed on top of the
 * original imported page, but the other way round. 
 * Place the PDF page using PDF_fit_pdi_page(), but supply the "blind" option
 * to suppress the actual page contents. Fill the block(s) as desired. Place the
 * PDF page again, this time without the "blind" option.
 * 
 * Required software: PPS 10
 * Required data: PDF document containing blocks
 */
package com.pdflib.cookbook.pdflib.blocks;

import com.pdflib.pdflib;
import com.pdflib.PDFlibException;

public class block_below_contents
{
    public static void main (String argv[])
    {
        /* This is where the data files are. Adjust as necessary. */
        String searchpath = "../input";

        /* By default annotations are also imported. In some cases this
         * requires the Noto fonts for creating annotation appearance streams.
         * We therefore set the searchpath to also point to the font directory.
         */
        String fontpath = "../resource/font";
        String outfile = "block_below_contents.pdf";
        String title = "Block below Contents";

        pdflib p = null;
        double width, height;
        String infile = "announcement_blocks.pdf";
        int tf = -1, inpage, indoc;
        String optlist;
        int exitcode = 0;
        
        /* Name of the block contained on the imported page */
        final String blockname = "offer"; 
        
        final String offer = 
            "SPECIAL\nSEASON\nOFFER\nby the\nPAPERFIELD\nPLANE CENTER";
     
        try {
            p = new pdflib();

            p.set_option("searchpath={" + searchpath + "}");

            p.set_option("searchpath={" + fontpath + "}");

            /* This means we must check return values of load_font() etc. */
            p.set_option("errorpolicy=return");

            if (p.begin_document(outfile, "") == -1)
                throw new Exception("Error: " + p.get_errmsg());

            p.set_info("Creator", "PDFlib Cookbook");
            p.set_info("Title", title);

            /* Open a PDF containing blocks */
            indoc = p.open_pdi_document(infile, "");
            if (indoc == -1)
                throw new Exception("Error: " + p.get_errmsg());
            
            /* Open the first page */
            inpage = p.open_pdi_page(indoc, 1, "");
            if (inpage == -1)
                throw new Exception("Error: " + p.get_errmsg());
            
            /* Get the width and height of the imported page */
            width = p.pcos_get_number(indoc, "pages[0]/width");
            height = p.pcos_get_number(indoc, "pages[0]/height");
            
            /* Start the output page with the size given by the imported page */ 
            p.begin_page_ext(width, height, "");

            /* Place the imported page on the output page but supply the "blind"
             * option to suppress the actual page contents
             */
            p.fit_pdi_page(inpage, 0, 0, "blind");
            
            /* Fill one block with the Textflow */ 
            String text = offer;
                  
            /* Option list for text blocks; the encoding should be defined
             * and the Textflow handle supplied. "alignment=center" is used
             * to center the text horizontally. Other options have
             * already been set in the properties of the blocks contained in
             * the input document, such as:
             * "fitmethod=clip" to clip the text when it doesn't fit completely
             * into the block while avoiding any text shrinking.
             * "margin=4" to set some space between the text and the borders of
             * the block rectangle.
             * "fontsize=60" as a font size of 60.
             * "fillcolor={gray 0.9}" to output the text in a light gray.
             */
            optlist =  "alignment=center textflowhandle=" + tf;
               
            tf = p.fill_textblock(inpage, blockname, text, optlist);
                    
            if (tf == -1)
                System.err.println("Warning: " + p.get_errmsg());
                    
            p.delete_textflow(tf);
            
            /* Place the imported page again but this time without the "blind"
             * option supplied
             */
            p.fit_pdi_page(inpage, 0, 0, "");

            p.end_page_ext("");
               
            p.close_pdi_page(inpage);

            p.end_document("");
            p.close_pdi_document(indoc);

        } 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);
        }
    }
}