complex_scripts/bidi_formatting
* Starter sample for bidirectional text formatting
*
* Demonstrate formatting of mixed left-to-right and right-to-left
* (bidirectional) text with default settings and with user-supplied
* Directional Formatting Codes as defined in Unicode.
*
* Required software: PDFlib/PDFlib+PDI/PPS 9
* Required data: Arabic font
*/
package com.pdflib.cookbook.pdflib.complex_scripts;
import com.pdflib.pdflib;
import com.pdflib.PDFlibException;
class bidi_formatting {
public static void main(String argv[]) {
/* This is where the data files are. Adjust as necessary. */
final String searchpath = "../input";
final String outfile = "bidi_formatting.pdf";
String optlist;
pdflib p = null;
int i, col, table;
final double llx = 50, lly = 50, urx = 800, ury = 550;
String result;
String header[] = { "Bidi formatting topic", "Raw input",
"Reordered and shaped output" };
class shaping {
shaping(String fontname, String optlist,
String language, String text) {
this.fontname = fontname;
this.optlist = optlist;
this.language = language;
this.text = text;
}
String fontname; /* name of the font for this script */
String optlist; /* text options */
String language; /* language name */
String text; /* sample text */
}
shaping shapingsamples[] = {
new shaping(
"ScheherazadeRegOT",
"shaping script=_auto charref",
"Mixed part number with default settings (wrong)",
"\u0631\u0642\u0645: XY \u0661\u0662\u0663 A"),
new shaping(
"ScheherazadeRegOT",
"shaping script=_auto charref",
"Mixed part number forced as LTR sequence",
"\u0631\u0642\u0645: &LRO;XY \u0661\u0662\u0663 A&PDF;"),
new shaping(
"ScheherazadeRegOT",
"shaping script=_auto charref",
"Mixed text with default settings (wrong order in RTL context)",
"He said '\u0645\u0631\u062D\u0628\u0627!' (Hello!) to me"),
new shaping(
"ScheherazadeRegOT",
"shaping script=_auto charref",
"Mixed text with initial RLM (wrong parentheses)",
"‏He said '\u0645\u0631\u062D\u0628\u0627!' " +
"(Hello!) to me"),
new shaping(
"ScheherazadeRegOT",
"shaping script=_auto charref",
"Mixed text with initial RLM and LRM after punctuation",
"‏He said '\u0645\u0631\u062D\u0628\u0627!' " +
"‎(Hello!) to me"),
new shaping(
"ScheherazadeRegOT",
"shaping script=_auto",
"Symmetrical swapping of mirrored glyphs",
"[\u0646\u0644\u0627\u062D\u0638] 3<4"),
new shaping(
"ScheherazadeRegOT",
"shaping script=_auto leader={alignment=left text=.}",
"Dot leaders: leader={alignment=left text=.}",
"\u0645\u0631\u062D\u0628\u0627"),
};
try {
p = new pdflib();
p.set_option("searchpath={" + searchpath + "}");
/*
* This means that formatting and other errors will raise an
* exception. This simplifies our sample code, but is not
* recommended for production code.
*/
p.set_option("errorpolicy=exception");
/* Set an output path according to the name of the topic.
* "direction=r2l" instructs Acrobat to treat the document as
* right-to-left document.
*/
if (p.begin_document(outfile, "viewerpreferences={direction=r2l}") == -1) {
throw new Exception("Error: " + p.get_errmsg());
}
p.set_info("Creator", "PDFlib Cookbook");
p.set_info("Title", "bidi_formatting $Revision: 1.7 $");
table = -1;
/* Create table header */
for (col = 0; col < header.length; col++) {
optlist =
"fittextline={fontname=Helvetica-Bold encoding=winansi "
+ "fontsize=14} colwidth=" + (col == 0 ? "40%" : "30%");
table = p.add_table_cell(table, col + 1, 1, header[col],
optlist);
}
/* Create shaping samples */
for (i = 0; i < shapingsamples.length; i++) {
final shaping sample = shapingsamples[i];
col = 1;
final int row = i + 2;
/* Column 1: description */
optlist = "margin=4 fittextline={fontname=Helvetica "
+ "encoding=unicode fontsize=12 position={left center}}";
table = p.add_table_cell(table, col++, row, sample.language,
optlist);
/* Column 2: raw text */
optlist = "margin=4 fittextline={fontname={" + sample.fontname
+ "} encoding=unicode fontsize=18 position={left center}}";
table = p.add_table_cell(table, col++, row, sample.text,
optlist);
/* Column 3: shaped and reordered text */
optlist =
"margin=4 fittextline={fontname={" + sample.fontname
+ "} encoding=unicode fontsize=18 "
+ sample.optlist + " position={right center}}";
table = p.add_table_cell(table, col++, row, sample.text,
optlist);
}
/* ---------- Place the table on one or more pages ---------- */
/*
* Loop until all of the table is placed; create new pages as long
* as more table instances need to be placed.
*/
do {
p.begin_page_ext(0, 0, "width=a4.height height=a4.width");
/* Shade every other row; draw lines for all table cells. */
optlist = "header=1 fill={{area=rowodd "
+ "fillcolor={gray 0.9}}} stroke={{line=other}} ";
/* Place the table instance */
result = p.fit_table(table, llx, lly, urx, ury, optlist);
if (result.equals("_error")) {
throw new Exception("Couldn't place table: "
+ p.get_errmsg());
}
p.end_page_ext("");
}
while (result.equals("_boxfull"));
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();
}
}
}
}