mirror of
https://github.com/Stirling-Tools/Stirling-PDF.git
synced 2024-11-04 15:00:14 +01:00
360 lines
15 KiB
Java
360 lines
15 KiB
Java
package stirling.software.SPDF.utils;
|
|
|
|
import java.awt.Graphics;
|
|
import java.awt.image.BufferedImage;
|
|
import java.io.ByteArrayInputStream;
|
|
import java.io.ByteArrayOutputStream;
|
|
import java.io.File;
|
|
import java.io.FileOutputStream;
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.nio.file.Files;
|
|
import java.util.ArrayList;
|
|
import java.util.Arrays;
|
|
import java.util.List;
|
|
import java.util.zip.ZipEntry;
|
|
import java.util.zip.ZipOutputStream;
|
|
|
|
import javax.imageio.ImageIO;
|
|
import javax.imageio.ImageReader;
|
|
|
|
import org.apache.pdfbox.pdmodel.PDDocument;
|
|
import org.apache.pdfbox.pdmodel.PDPage;
|
|
import org.apache.pdfbox.pdmodel.PDPageContentStream;
|
|
import org.apache.pdfbox.pdmodel.common.PDRectangle;
|
|
import org.apache.pdfbox.pdmodel.graphics.image.JPEGFactory;
|
|
import org.apache.pdfbox.pdmodel.graphics.image.LosslessFactory;
|
|
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
|
|
import org.apache.pdfbox.rendering.ImageType;
|
|
import org.apache.pdfbox.rendering.PDFRenderer;
|
|
import org.apache.pdfbox.text.PDFTextStripper;
|
|
import org.slf4j.Logger;
|
|
import org.slf4j.LoggerFactory;
|
|
import org.springframework.web.multipart.MultipartFile;
|
|
|
|
import stirling.software.SPDF.pdf.ImageFinder;
|
|
|
|
public class PdfUtils {
|
|
|
|
private static final Logger logger = LoggerFactory.getLogger(PdfUtils.class);
|
|
|
|
|
|
public static PDRectangle textToPageSize(String size) {
|
|
switch (size.toUpperCase()) {
|
|
case "A0":
|
|
return PDRectangle.A0;
|
|
case "A1":
|
|
return PDRectangle.A1;
|
|
case "A2":
|
|
return PDRectangle.A2;
|
|
case "A3":
|
|
return PDRectangle.A3;
|
|
case "A4":
|
|
return PDRectangle.A4;
|
|
case "A5":
|
|
return PDRectangle.A5;
|
|
case "A6":
|
|
return PDRectangle.A6;
|
|
case "LETTER":
|
|
return PDRectangle.LETTER;
|
|
case "LEGAL":
|
|
return PDRectangle.LEGAL;
|
|
default:
|
|
throw new IllegalArgumentException("Invalid standard page size: " + size);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
public static boolean hasImages(PDDocument document, String pagesToCheck) throws IOException {
|
|
String[] pageOrderArr = pagesToCheck.split(",");
|
|
List<Integer> pageList = GeneralUtils.parsePageList(pageOrderArr, document.getNumberOfPages());
|
|
|
|
for (int pageNumber : pageList) {
|
|
PDPage page = document.getPage(pageNumber);
|
|
if (hasImagesOnPage(page)) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public static boolean hasText(PDDocument document, String pageNumbersToCheck, String phrase) throws IOException {
|
|
String[] pageOrderArr = pageNumbersToCheck.split(",");
|
|
List<Integer> pageList = GeneralUtils.parsePageList(pageOrderArr, document.getNumberOfPages());
|
|
|
|
for (int pageNumber : pageList) {
|
|
PDPage page = document.getPage(pageNumber);
|
|
if (hasTextOnPage(page, phrase)) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
public static boolean hasImagesOnPage(PDPage page) throws IOException {
|
|
ImageFinder imageFinder = new ImageFinder(page);
|
|
imageFinder.processPage(page);
|
|
return imageFinder.hasImages();
|
|
}
|
|
|
|
|
|
|
|
|
|
public static boolean hasTextOnPage(PDPage page, String phrase) throws IOException {
|
|
PDFTextStripper textStripper = new PDFTextStripper();
|
|
PDDocument tempDoc = new PDDocument();
|
|
tempDoc.addPage(page);
|
|
String pageText = textStripper.getText(tempDoc);
|
|
tempDoc.close();
|
|
return pageText.contains(phrase);
|
|
}
|
|
|
|
|
|
public boolean containsTextInFile(PDDocument pdfDocument, String text, String pagesToCheck) throws IOException {
|
|
PDFTextStripper textStripper = new PDFTextStripper();
|
|
String pdfText = "";
|
|
|
|
if(pagesToCheck == null || pagesToCheck.equals("all")) {
|
|
pdfText = textStripper.getText(pdfDocument);
|
|
} else {
|
|
// remove whitespaces
|
|
pagesToCheck = pagesToCheck.replaceAll("\\s+", "");
|
|
|
|
String[] splitPoints = pagesToCheck.split(",");
|
|
for (String splitPoint : splitPoints) {
|
|
if (splitPoint.contains("-")) {
|
|
// Handle page ranges
|
|
String[] range = splitPoint.split("-");
|
|
int startPage = Integer.parseInt(range[0]);
|
|
int endPage = Integer.parseInt(range[1]);
|
|
|
|
for (int i = startPage; i <= endPage; i++) {
|
|
textStripper.setStartPage(i);
|
|
textStripper.setEndPage(i);
|
|
pdfText += textStripper.getText(pdfDocument);
|
|
}
|
|
} else {
|
|
// Handle individual page
|
|
int page = Integer.parseInt(splitPoint);
|
|
textStripper.setStartPage(page);
|
|
textStripper.setEndPage(page);
|
|
pdfText += textStripper.getText(pdfDocument);
|
|
}
|
|
}
|
|
}
|
|
|
|
pdfDocument.close();
|
|
|
|
return pdfText.contains(text);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
public boolean pageCount(PDDocument pdfDocument, int pageCount, String comparator) throws IOException {
|
|
int actualPageCount = pdfDocument.getNumberOfPages();
|
|
pdfDocument.close();
|
|
|
|
switch(comparator.toLowerCase()) {
|
|
case "greater":
|
|
return actualPageCount > pageCount;
|
|
case "equal":
|
|
return actualPageCount == pageCount;
|
|
case "less":
|
|
return actualPageCount < pageCount;
|
|
default:
|
|
throw new IllegalArgumentException("Invalid comparator. Only 'greater', 'equal', and 'less' are supported.");
|
|
}
|
|
}
|
|
|
|
public boolean pageSize(PDDocument pdfDocument, String expectedPageSize) throws IOException {
|
|
PDPage firstPage = pdfDocument.getPage(0);
|
|
PDRectangle mediaBox = firstPage.getMediaBox();
|
|
|
|
float actualPageWidth = mediaBox.getWidth();
|
|
float actualPageHeight = mediaBox.getHeight();
|
|
|
|
pdfDocument.close();
|
|
|
|
// Assumes the expectedPageSize is in the format "widthxheight", e.g. "595x842" for A4
|
|
String[] dimensions = expectedPageSize.split("x");
|
|
float expectedPageWidth = Float.parseFloat(dimensions[0]);
|
|
float expectedPageHeight = Float.parseFloat(dimensions[1]);
|
|
|
|
// Checks if the actual page size matches the expected page size
|
|
return actualPageWidth == expectedPageWidth && actualPageHeight == expectedPageHeight;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
public static byte[] convertFromPdf(byte[] inputStream, String imageType, ImageType colorType, boolean singleImage, int DPI, String filename) throws IOException, Exception {
|
|
try (PDDocument document = PDDocument.load(new ByteArrayInputStream(inputStream))) {
|
|
PDFRenderer pdfRenderer = new PDFRenderer(document);
|
|
int pageCount = document.getNumberOfPages();
|
|
List<BufferedImage> images = new ArrayList<>();
|
|
|
|
// Create images of all pages
|
|
for (int i = 0; i < pageCount; i++) {
|
|
images.add(pdfRenderer.renderImageWithDPI(i, DPI, colorType));
|
|
}
|
|
|
|
if (singleImage) {
|
|
// Combine all images into a single big image
|
|
BufferedImage combined = new BufferedImage(images.get(0).getWidth(), images.get(0).getHeight() * pageCount, BufferedImage.TYPE_INT_RGB);
|
|
Graphics g = combined.getGraphics();
|
|
for (int i = 0; i < images.size(); i++) {
|
|
g.drawImage(images.get(i), 0, i * images.get(0).getHeight(), null);
|
|
}
|
|
images = Arrays.asList(combined);
|
|
}
|
|
|
|
// Create a ByteArrayOutputStream to save the image(s) to
|
|
ByteArrayOutputStream baos = new ByteArrayOutputStream();
|
|
if (singleImage) {
|
|
// Write the image to the output stream
|
|
ImageIO.write(images.get(0), imageType, baos);
|
|
|
|
// Log that the image was successfully written to the byte array
|
|
logger.info("Image successfully written to byte array");
|
|
} else {
|
|
// Zip the images and return as byte array
|
|
try (ZipOutputStream zos = new ZipOutputStream(baos)) {
|
|
for (int i = 0; i < images.size(); i++) {
|
|
BufferedImage image = images.get(i);
|
|
try (ByteArrayOutputStream baosImage = new ByteArrayOutputStream()) {
|
|
ImageIO.write(image, imageType, baosImage);
|
|
|
|
// Add the image to the zip file
|
|
zos.putNextEntry(new ZipEntry(String.format(filename + "_%d.%s", i + 1, imageType.toLowerCase())));
|
|
zos.write(baosImage.toByteArray());
|
|
}
|
|
}
|
|
// Log that the images were successfully written to the byte array
|
|
logger.info("Images successfully written to byte array as a zip");
|
|
}
|
|
}
|
|
return baos.toByteArray();
|
|
} catch (IOException e) {
|
|
// Log an error message if there is an issue converting the PDF to an image
|
|
logger.error("Error converting PDF to image", e);
|
|
throw e;
|
|
}
|
|
}
|
|
public static byte[] imageToPdf(MultipartFile[] files, String fitOption, boolean autoRotate, String colorType) throws IOException {
|
|
try (PDDocument doc = new PDDocument()) {
|
|
for (MultipartFile file : files) {
|
|
String contentType = file.getContentType();
|
|
String originalFilename = file.getOriginalFilename();
|
|
if (originalFilename != null && (originalFilename.toLowerCase().endsWith(".tiff") || originalFilename.toLowerCase().endsWith(".tif")) ) {
|
|
ImageReader reader = ImageIO.getImageReadersByFormatName("tiff").next();
|
|
reader.setInput(ImageIO.createImageInputStream(file.getInputStream()));
|
|
int numPages = reader.getNumImages(true);
|
|
for (int i = 0; i < numPages; i++) {
|
|
BufferedImage pageImage = reader.read(i);
|
|
BufferedImage convertedImage = ImageProcessingUtils.convertColorType(pageImage, colorType);
|
|
PDImageXObject pdImage = LosslessFactory.createFromImage(doc, convertedImage);
|
|
addImageToDocument(doc, pdImage, fitOption, autoRotate);
|
|
}
|
|
} else {
|
|
BufferedImage image = ImageIO.read(file.getInputStream());
|
|
BufferedImage convertedImage = ImageProcessingUtils.convertColorType(image, colorType);
|
|
PDImageXObject pdImage = LosslessFactory.createFromImage(doc, convertedImage);
|
|
addImageToDocument(doc, pdImage, fitOption, autoRotate);
|
|
}
|
|
}
|
|
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
|
|
doc.save(byteArrayOutputStream);
|
|
logger.info("PDF successfully saved to byte array");
|
|
return byteArrayOutputStream.toByteArray();
|
|
}
|
|
}
|
|
|
|
private static void addImageToDocument(PDDocument doc, PDImageXObject image, String fitOption, boolean autoRotate) throws IOException {
|
|
boolean imageIsLandscape = image.getWidth() > image.getHeight();
|
|
PDRectangle pageSize = PDRectangle.A4;
|
|
|
|
System.out.println(fitOption);
|
|
|
|
if (autoRotate && imageIsLandscape) {
|
|
pageSize = new PDRectangle(pageSize.getHeight(), pageSize.getWidth());
|
|
}
|
|
|
|
if ("fitDocumentToImage".equals(fitOption)) {
|
|
pageSize = new PDRectangle(image.getWidth(), image.getHeight());
|
|
}
|
|
|
|
PDPage page = new PDPage(pageSize);
|
|
doc.addPage(page);
|
|
|
|
float pageWidth = page.getMediaBox().getWidth();
|
|
float pageHeight = page.getMediaBox().getHeight();
|
|
|
|
try (PDPageContentStream contentStream = new PDPageContentStream(doc, page)) {
|
|
if ("fillPage".equals(fitOption) || "fitDocumentToImage".equals(fitOption)) {
|
|
contentStream.drawImage(image, 0, 0, pageWidth, pageHeight);
|
|
} else if ("maintainAspectRatio".equals(fitOption)) {
|
|
float imageAspectRatio = (float) image.getWidth() / (float) image.getHeight();
|
|
float pageAspectRatio = pageWidth / pageHeight;
|
|
|
|
float scaleFactor = 1.0f;
|
|
if (imageAspectRatio > pageAspectRatio) {
|
|
scaleFactor = pageWidth / image.getWidth();
|
|
} else {
|
|
scaleFactor = pageHeight / image.getHeight();
|
|
}
|
|
|
|
float xPos = (pageWidth - (image.getWidth() * scaleFactor)) / 2;
|
|
float yPos = (pageHeight - (image.getHeight() * scaleFactor)) / 2;
|
|
contentStream.drawImage(image, xPos, yPos, image.getWidth() * scaleFactor, image.getHeight() * scaleFactor);
|
|
}
|
|
} catch (IOException e) {
|
|
logger.error("Error adding image to PDF", e);
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
|
|
public static byte[] overlayImage(byte[] pdfBytes, byte[] imageBytes, float x, float y, boolean everyPage) throws IOException {
|
|
|
|
PDDocument document = PDDocument.load(new ByteArrayInputStream(pdfBytes));
|
|
|
|
// Get the first page of the PDF
|
|
int pages = document.getNumberOfPages();
|
|
for (int i = 0; i < pages; i++) {
|
|
PDPage page = document.getPage(i);
|
|
try (PDPageContentStream contentStream = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.APPEND, true)) {
|
|
// Create an image object from the image bytes
|
|
PDImageXObject image = PDImageXObject.createFromByteArray(document, imageBytes, "");
|
|
// Draw the image onto the page at the specified x and y coordinates
|
|
contentStream.drawImage(image, x, y);
|
|
logger.info("Image successfully overlayed onto PDF");
|
|
if (!everyPage && i == 0) {
|
|
break;
|
|
}
|
|
} catch (IOException e) {
|
|
// Log an error message if there is an issue overlaying the image onto the PDF
|
|
logger.error("Error overlaying image onto PDF", e);
|
|
throw e;
|
|
}
|
|
|
|
}
|
|
// Create a ByteArrayOutputStream to save the PDF to
|
|
ByteArrayOutputStream baos = new ByteArrayOutputStream();
|
|
document.save(baos);
|
|
logger.info("PDF successfully saved to byte array");
|
|
return baos.toByteArray();
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|