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blocks/override_block_rectangle

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/* $Id: override_block_rectangle.java,v 1.5 2013/01/15 10:11:56 stm Exp $

 * Override block rectangle:

 * Fill some blocks of an imported PDF page while changing the rectangle

 * coordinates.

 *

 * Output an imported PDF page containing blocks. The blocks "name",

 * "business_address", and "business_city" have a defined font, font size, and

 * color. Fill those blocks by using a different font and a larger font size.

 * In addition, due to the increased font, increase the block rectangle and

 * move its position to prevent it from overlapping with the other blocks.   

 *

 * Required software: PPS 9

 * Required data: PDF document containing blocks

 */

package com.pdflib.cookbook.pdflib.blocks;


import com.pdflib.pdflib;

import com.pdflib.PDFlibException;


public class override_block_rectangle

{

    public static void main (String argv[])

    {

    /* This is where the data files are. Adjust as necessary. */

    String searchpath = "../input";

    String outfile = "override_block_rectangle.pdf";

    String title = "Override Block Rectangle";


    pdflib p = null;

    double width, height;

    String infile = "stationery_blocks.pdf";

    int inpage, indoc;

    String blockname = "", blocktype = "";

    String text_optlist;

    double block_llx, block_lly, block_urx, block_ury;

    double newblock_llx, newblock_lly, newblock_urx, newblock_ury;

    int i, j, blockcount;

    double blockfontsize, newfontsize, enlarge;

   

    final double incrfactor = 3;

    final int percentage = 30;

     

    final int nblocks = 3; // number of blocks with properties to be overridden

   

    /* Names of blocks with properties to be overridden */

    String blocknames[] = {

        "name", "business_address", "business_city"

    };

   

    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");


        if (p.begin_document(outfile, "") == -1)

            throw new Exception("Error: " + p.get_errmsg());


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

        p.set_info("Title", title + " $Revision: 1.5 $");

       

        /* 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 */

        p.fit_pdi_page(inpage, 0, 0, "");

       

        /* Retrieve the number of blocks contained on the first page (which is

         * page no. 0) of the PDF opened

         */     

        blockcount = (int) p.pcos_get_number(indoc,

            "length:pages[0]/blocks");


        if (blockcount == 0)

            throw new Exception("Error: " + infile +

                "does not contain any PDFlib blocks");

       

        /* For three Text blocks on the first page, increase

         * the font size by 20%. Increase the size of the block rectangle by

         * a defined percentage and move the block down to prevent it from

         * overlapping with another block.

         */

        for (i = 0; i < blockcount; i++)

        {

            /* Get the name of the block */

            blockname = p.pcos_get_string(indoc,

                "pages[0]/blocks[" + i + "]/Name");

           

            /* Get the type of the block */

            blocktype = p.pcos_get_string(indoc,

                "pages[0]/blocks[" + i + "]/Subtype");

           

            for (j = 0; j < nblocks; j++) {

                if (blockname.equals(blocknames[j])) {

                    /* Check if it is a Text block */

                    if (blocktype.equals("Text"))

                    {

                    /* Get the font size of the block */

                    blockfontsize = p.pcos_get_number(indoc,

                        "pages[0]/blocks[" + i + "]/fontsize");

                       

                    /* Retrieve the rectangle coordinates of the block */

                    block_llx = (int) p.pcos_get_number(indoc,

                        "pages[0]/blocks[" + i + "]/Rect[0]");

                   

                    block_lly = (int) p.pcos_get_number(indoc,

                        "pages[0]/blocks[" + i + "]/Rect[1]");

                   

                    block_urx = (int) p.pcos_get_number(indoc,

                        "pages[0]/blocks[" + i + "]/Rect[2]");

                   

                    block_ury = (int) p.pcos_get_number(indoc,

                        "pages[0]/blocks[" + i + "]/Rect[3]");

                   

                    /* Increase the font size by the percentage defined */

                    newfontsize = blockfontsize * (percentage + 100) / 100;

                   

                    /* Specify the enlargement by the difference between the old

                     * and the new font size multiplied by an increment factor

                     */

                    enlarge = incrfactor * (newfontsize - blockfontsize);

                   

                    /* Increase the block rectangle by the enlargement

                     * specified. In addition, move the rectangle down by j

                     * times the enlargment to prevent the blocks from

                     * overlapping.

                     */

                    newblock_llx = block_llx;

                    newblock_lly = block_lly - (1 + j) * enlarge;

                    newblock_urx = block_urx + enlarge;

                    newblock_ury = block_ury - j * enlarge;

                   

                    text_optlist =

                        "fontname=Courier encoding=unicode fontsize=" +

                        newfontsize +

                        " refpoint={" + block_llx + " " + newblock_lly + "}" +

                        " boxsize={" + (newblock_urx - newblock_llx) + " " +

                        (newblock_ury - newblock_lly) + "}" +

                        " fillcolor={rgb 0 0.7 0}";

                   

                    if (p.fill_textblock(inpage, blockname, blockname,

                        text_optlist) == -1)

                        System.err.println("Warning: " + p.get_errmsg());

                    }

                    break;

                }

            }

        }

 

        p.end_page_ext("");


        p.close_pdi_page(inpage);


        p.end_document("");

        p.close_pdi_document(indoc);


        } 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.toString());

        } finally {

            if (p != null) {

                p.delete();

            }

        }

    }

}