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Improved API documentation

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This commit is contained in:
Anthony Stirling
2023-05-13 10:32:47 +01:00
parent 53e5edcb75
commit 6581bb4ab4
13 changed files with 223 additions and 226 deletions
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69
src/main/java/stirling/software/SPDF/utils/WatermarkRemover.java
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@@ -1,69 +0,0 @@
package stirling.software.SPDF.utils;
import java.io.IOException;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.pdfbox.contentstream.PDFStreamEngine;
import org.apache.pdfbox.contentstream.operator.Operator;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSString;
public class WatermarkRemover extends PDFStreamEngine {
private final Pattern pattern;
private final String watermarkText;
public WatermarkRemover(String watermarkText) {
this.watermarkText = watermarkText;
this.pattern = Pattern.compile(Pattern.quote(watermarkText));
}
@Override
protected void processOperator(Operator operator, List<COSBase> operands) throws IOException {
String operation = operator.getName();
boolean processText = false;
if ("Tj".equals(operation) || "TJ".equals(operation) || "'".equals(operation) || "\"".equals(operation)) {
processText = true;
}
if (processText) {
for (int j = 0; j < operands.size(); ++j) {
COSBase operand = operands.get(j);
if (operand instanceof COSString) {
COSString cosString = (COSString) operand;
String string = cosString.getString();
Matcher matcher = pattern.matcher(string);
if (matcher.find()) {
string = matcher.replaceAll("");
cosString.setValue(string.getBytes());
}
} else if (operand instanceof COSArray) {
COSArray array = (COSArray) operand;
for (int i = 0; i < array.size(); i++) {
COSBase item = array.get(i);
if (item instanceof COSString) {
COSString cosString = (COSString) item;
String string = cosString.getString();
Matcher matcher = pattern.matcher(string);
if (matcher.find()) {
System.out.println("operation =" + operation);
System.out.println("1 =" + string);
string = matcher.replaceAll("");
cosString.setValue(string.getBytes());
array.set(i, cosString);
operands.set(j, array);
}
}
}
}
}
}
super.processOperator(operator, operands);
}
}