blocks/override_block_rectangle
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.
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* 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 7
* 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_parameter("SearchPath", searchpath);
/* This means we must check return values of load_font() etc. */
p.set_parameter("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: 1.2.4.1 $");
/* 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();
}
}
}
}