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// Copyright (c) 2023 Teddy Wing
//
// This file is part of PDF Form Replace Font2.
//
// PDF Form Replace Font2 is free software: you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// PDF Form Replace Font2 is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with PDF Form Replace Font2. If not, see
// <https://www.gnu.org/licenses/>.
package com.teddywing.pdf_form_replace_font2;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.DefaultParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.io.font.constants.StandardFonts;
import com.itextpdf.io.font.FontProgram;
import com.itextpdf.io.font.FontProgramFactory;
import com.itextpdf.io.font.PdfEncodings;
import com.itextpdf.forms.PdfAcroForm;
import com.itextpdf.forms.fields.PdfFormField;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.Properties;
public class App {
public static void main(String[] args) throws IOException {
Options options = new Options();
options.addOption("f", "find", true, "original font");
options.addOption("r", "replace", true, "replacement font");
options.addOption("o", "output", true, "output file");
options.addOption("h", "help", false, "print this help menu");
options.addOption("V", "version", false, "show the program version");
CommandLineParser option_parser = new DefaultParser();
try {
CommandLine options_matches = option_parser.parse(options, args);
boolean should_show_help = options_matches.hasOption("help");
if (should_show_help) {
HelpFormatter help_formatter = new HelpFormatter();
help_formatter.printHelp("pdf-form-replace-font2", options);
System.exit(0);
}
boolean should_show_version = options_matches.hasOption("version");
if (should_show_version) {
Properties properties = new Properties();
InputStream stream = App.class.getResourceAsStream("/META-INF/maven/com.teddywing.pdf_form_replace_font2/pdf-form-replace-font2/pom.properties");
properties.load(stream);
String version = properties.getProperty("version", "");
System.out.println(version);
System.exit(0);
}
PdfReader reader;
String[] free_args = options_matches.getArgs();
if (free_args.length == 0) {
reader = new PdfReader(System.in);
}
else {
String input = free_args[0];
reader = new PdfReader(input);
}
String find = options_matches.getOptionValue("find");
if (find == null) {
System.err.println("error: required option 'find' missing");
System.exit(64);
}
String replace = options_matches.getOptionValue("replace");
if (replace == null) {
System.err.println("error: required option 'replace' missing");
System.exit(64);
}
PdfWriter writer;
String output = options_matches.getOptionValue("output");
if (output == null) {
writer = new PdfWriter(System.out);
}
else {
writer = new PdfWriter(output);
}
App.replacePdfFieldFont(reader, writer, find, replace);
}
catch (ParseException e) {
System.err.println("error: " + e.getMessage());
System.exit(64);
}
}
private static void replacePdfFieldFont(
PdfReader reader,
PdfWriter writer,
String original_font_postscript_name,
String replacement_font_postscript_name
) throws IOException {
PdfDocument pdf = new PdfDocument(reader, writer);
FontProgramFactory
.registerFontDirectory("/Library/Fonts/");
FontProgramFactory
.registerFontDirectory("/System/Library/Fonts/");
FontProgramFactory
.registerFontDirectory("/System/Library/Fonts/Supplemental/");
FontProgramFactory
.registerFontDirectory(System.getProperty("user.home") + "/Library/Fonts/");
FontProgram courier_program = FontProgramFactory
.createRegisteredFont(replacement_font_postscript_name);
PdfFont courier = PdfFontFactory.createFont(
courier_program,
PdfEncodings.UTF8,
PdfFontFactory.EmbeddingStrategy.FORCE_NOT_EMBEDDED
);
PdfAcroForm form = PdfAcroForm.getAcroForm(pdf, false);
Map<String, PdfFormField> fields = form.getFormFields();
for (Map.Entry<String, PdfFormField> entry : fields.entrySet()) {
PdfFormField field = entry.getValue();
PdfFont original_font = field.getFont();
String original_postscript_name = original_font
.getFontProgram()
.getFontNames()
.getFontName();
if (original_postscript_name.equals(original_font_postscript_name)) {
field.setFont(courier);
}
}
pdf.close();
}
}
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