Marmelator/pdftron-logic-commons
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RED-8212: fix tables for ocred documents

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This commit is contained in:
Kilian Schüttler 2024-01-23 10:50:09 +01:00
parent 2caa3e92a4
commit 6b6417ed80
1 changed files with 58 additions and 29 deletions
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61
src/main/java/com/iqser/red/pdftronlogic/commons/InvisibleElementRemovalService.java
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@ -8,13 +8,9 @@ import java.awt.geom.Rectangle2D;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import java.util.concurrent.atomic.AtomicReference;
import java.util.stream.Collectors;
import com.pdftron.common.PDFNetException;
import com.pdftron.pdf.ColorPt;
@ -55,16 +51,17 @@ public class InvisibleElementRemovalService {
* -Any Text set to clipping with its many interactions with other elements
*
* @param pdfFile The PDF file to process
* @param removePaths If this flag is set, invisible path elements will be removed
* @param delta If this flag is set only the removed Elements will be written to the output file.
* The Elements are red if they are removed by clipping path, blue for transparency, and a green bounding box for overlap.
* @param out OutputStream to write the resulting file to
**/
@SneakyThrows
public void removeInvisibleElements(InputStream pdfFile, OutputStream out, boolean delta) {
public void removeInvisibleElements(InputStream pdfFile, OutputStream out, boolean delta, boolean removePaths) {
PDFDoc pdfDoc = new PDFDoc(pdfFile);
execute(pdfDoc, delta);
execute(pdfDoc, delta, removePaths);
try {
pdfDoc.save(out, SDFDoc.SaveMode.LINEARIZED, null);
@ -79,17 +76,36 @@ public class InvisibleElementRemovalService {
/**
* This method is similar to {@link #removeInvisibleElements(InputStream, OutputStream, boolean)}, just with a PDFDoc.
* This method is equal to {@link #removeInvisibleElements(InputStream, OutputStream, boolean, boolean)}, with removePaths == true.
*/
@SneakyThrows
public void removeInvisibleElements(InputStream pdfFile, OutputStream out, boolean delta) {
removeInvisibleElements(pdfFile, out, delta, true);
}
/**
* This method is similar to {@link #removeInvisibleElements(InputStream, OutputStream, boolean, boolean)}, just with a PDFDoc.
*/
@SneakyThrows
public void removeInvisibleElements(PDFDoc pdfDoc, boolean removePaths, boolean delta) {
execute(pdfDoc, delta, removePaths);
}
/**
* This method is equal to {@link #removeInvisibleElements(PDFDoc, boolean, boolean)}, with removePaths == true.
*/
@SneakyThrows
public void removeInvisibleElements(PDFDoc pdfDoc, boolean delta) {
execute(pdfDoc, delta);
execute(pdfDoc, delta, true);
}
@SneakyThrows
private void execute(PDFDoc pdfDoc, boolean delta) {
private void execute(PDFDoc pdfDoc, boolean delta, boolean removePaths) {
log.info("Start removing invisible Elements");
ElementWriter writer = new ElementWriter();
@ -105,6 +121,7 @@ public class InvisibleElementRemovalService {
InvisibleElementRemovalContext context = InvisibleElementRemovalContext.builder()
.reader(reader)
.clippingPathStack(new ClippingPathStack(page.getMediaBox()))
.removePaths(removePaths)
.delta(delta)
.overlappedElements(new ArrayList<>())
.visibleElements(new ArrayList<>())
@ -297,11 +314,11 @@ public class InvisibleElementRemovalService {
context.visibleElements().removeAll(currentOverlappedElements);
}
context.visibleElements().add(ElementFeatureFactory.extractFeatures(pathElement));
if (!context.delta()) {
if (!context.delta() || !context.removePaths()) {
writer.writeElement(pathElement);
}
}
if (context.delta() && !inClippingPath) {
if (context.delta() && !inClippingPath && context.removePaths()) {
pathElement.getGState().setFillColorSpace(ColorSpace.createDeviceRGB());
pathElement.getGState().setFillColor(new ColorPt(1, 0, 0));
pathElement.getGState().setStrokeColorSpace(ColorSpace.createDeviceRGB());
@ -336,7 +353,22 @@ public class InvisibleElementRemovalService {
for (Element element = context.reader().next(); element != null; element = context.reader().next()) {
switch (element.getType()) {
case Element.e_form -> processFormOverlappedElements(writer, element, context);
case Element.e_path, Element.e_image, Element.e_inline_image, Element.e_text -> {
case Element.e_image, Element.e_inline_image, Element.e_text -> removeOverlappedElement(writer, context, element);
case Element.e_path -> {
if (context.removePaths()) {
removeOverlappedElement(writer, context, element);
} else {
writer.writeElement(element);
}
}
default -> writer.writeElement(element);
}
}
}
private static void removeOverlappedElement(ElementWriter writer, InvisibleElementRemovalContext context, Element element) throws PDFNetException {
boolean anyMatch = false;
for (ElementFeatures elementToRemove : context.overlappedElements()) {
if (elementToRemove.almostMatches(element)) {
@ -357,10 +389,6 @@ public class InvisibleElementRemovalService {
writer.writeGStateChanges(element);
}
}
default -> writer.writeElement(element);
}
}
}
private void processFormOverlappedElements(ElementWriter writer, Element formElement, InvisibleElementRemovalContext context) throws PDFNetException {
@ -490,6 +518,7 @@ public class InvisibleElementRemovalService {
@Builder
private record InvisibleElementRemovalContext(
boolean removePaths,
boolean delta,
ElementReader reader,
ClippingPathStack clippingPathStack,