mirror of
https://github.com/Stirling-Tools/Stirling-PDF.git
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373 lines
16 KiB
Java
373 lines
16 KiB
Java
package stirling.software.SPDF.utils;
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import java.awt.Graphics;
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import java.awt.image.BufferedImage;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.file.Files;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipOutputStream;
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import javax.imageio.ImageIO;
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import javax.imageio.ImageReader;
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import org.apache.pdfbox.pdmodel.PDDocument;
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import org.apache.pdfbox.pdmodel.PDPage;
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import org.apache.pdfbox.pdmodel.PDPageContentStream;
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import org.apache.pdfbox.pdmodel.common.PDRectangle;
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import org.apache.pdfbox.pdmodel.graphics.image.JPEGFactory;
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import org.apache.pdfbox.pdmodel.graphics.image.LosslessFactory;
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import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
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import org.apache.pdfbox.rendering.ImageType;
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import org.apache.pdfbox.rendering.PDFRenderer;
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import org.apache.pdfbox.text.PDFTextStripper;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.web.multipart.MultipartFile;
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import com.itextpdf.kernel.pdf.PdfPage;
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import com.itextpdf.kernel.pdf.canvas.parser.PdfTextExtractor;
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import com.itextpdf.kernel.pdf.canvas.parser.listener.SimpleTextExtractionStrategy;
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import stirling.software.SPDF.pdf.ImageFinder;
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public class PdfUtils {
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private static final Logger logger = LoggerFactory.getLogger(PdfUtils.class);
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public static PDRectangle textToPageSize(String size) {
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switch (size.toUpperCase()) {
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case "A0":
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return PDRectangle.A0;
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case "A1":
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return PDRectangle.A1;
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case "A2":
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return PDRectangle.A2;
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case "A3":
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return PDRectangle.A3;
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case "A4":
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return PDRectangle.A4;
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case "A5":
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return PDRectangle.A5;
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case "A6":
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return PDRectangle.A6;
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case "LETTER":
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return PDRectangle.LETTER;
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case "LEGAL":
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return PDRectangle.LEGAL;
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default:
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throw new IllegalArgumentException("Invalid standard page size: " + size);
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}
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}
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public static boolean hasImages(PDDocument document, String pagesToCheck) throws IOException {
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String[] pageOrderArr = pagesToCheck.split(",");
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List<Integer> pageList = GeneralUtils.parsePageList(pageOrderArr, document.getNumberOfPages());
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for (int pageNumber : pageList) {
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PDPage page = document.getPage(pageNumber);
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if (hasImagesOnPage(page)) {
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return true;
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}
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}
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return false;
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}
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public static boolean hasText(PDDocument document, String pageNumbersToCheck, String phrase) throws IOException {
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String[] pageOrderArr = pageNumbersToCheck.split(",");
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List<Integer> pageList = GeneralUtils.parsePageList(pageOrderArr, document.getNumberOfPages());
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for (int pageNumber : pageList) {
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PDPage page = document.getPage(pageNumber);
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if (hasTextOnPage(page, phrase)) {
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return true;
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}
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}
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return false;
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}
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public static boolean hasImagesOnPage(PDPage page) throws IOException {
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ImageFinder imageFinder = new ImageFinder(page);
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imageFinder.processPage(page);
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return imageFinder.hasImages();
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}
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public static boolean hasTextOnPage(PDPage page, String phrase) throws IOException {
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PDFTextStripper textStripper = new PDFTextStripper();
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PDDocument tempDoc = new PDDocument();
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tempDoc.addPage(page);
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String pageText = textStripper.getText(tempDoc);
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tempDoc.close();
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return pageText.contains(phrase);
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}
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public boolean containsTextInFile(PDDocument pdfDocument, String text, String pagesToCheck) throws IOException {
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PDFTextStripper textStripper = new PDFTextStripper();
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String pdfText = "";
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if(pagesToCheck == null || pagesToCheck.equals("all")) {
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pdfText = textStripper.getText(pdfDocument);
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} else {
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// remove whitespaces
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pagesToCheck = pagesToCheck.replaceAll("\\s+", "");
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String[] splitPoints = pagesToCheck.split(",");
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for (String splitPoint : splitPoints) {
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if (splitPoint.contains("-")) {
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// Handle page ranges
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String[] range = splitPoint.split("-");
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int startPage = Integer.parseInt(range[0]);
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int endPage = Integer.parseInt(range[1]);
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for (int i = startPage; i <= endPage; i++) {
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textStripper.setStartPage(i);
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textStripper.setEndPage(i);
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pdfText += textStripper.getText(pdfDocument);
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}
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} else {
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// Handle individual page
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int page = Integer.parseInt(splitPoint);
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textStripper.setStartPage(page);
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textStripper.setEndPage(page);
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pdfText += textStripper.getText(pdfDocument);
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}
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}
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}
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pdfDocument.close();
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return pdfText.contains(text);
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}
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public boolean pageCount(PDDocument pdfDocument, int pageCount, String comparator) throws IOException {
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int actualPageCount = pdfDocument.getNumberOfPages();
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pdfDocument.close();
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switch(comparator.toLowerCase()) {
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case "greater":
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return actualPageCount > pageCount;
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case "equal":
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return actualPageCount == pageCount;
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case "less":
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return actualPageCount < pageCount;
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default:
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throw new IllegalArgumentException("Invalid comparator. Only 'greater', 'equal', and 'less' are supported.");
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}
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}
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public boolean pageSize(PDDocument pdfDocument, String expectedPageSize) throws IOException {
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PDPage firstPage = pdfDocument.getPage(0);
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PDRectangle mediaBox = firstPage.getMediaBox();
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float actualPageWidth = mediaBox.getWidth();
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float actualPageHeight = mediaBox.getHeight();
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pdfDocument.close();
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// Assumes the expectedPageSize is in the format "widthxheight", e.g. "595x842" for A4
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String[] dimensions = expectedPageSize.split("x");
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float expectedPageWidth = Float.parseFloat(dimensions[0]);
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float expectedPageHeight = Float.parseFloat(dimensions[1]);
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// Checks if the actual page size matches the expected page size
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return actualPageWidth == expectedPageWidth && actualPageHeight == expectedPageHeight;
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}
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public static byte[] convertFromPdf(byte[] inputStream, String imageType, ImageType colorType, boolean singleImage, int DPI, String filename) throws IOException, Exception {
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try (PDDocument document = PDDocument.load(new ByteArrayInputStream(inputStream))) {
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PDFRenderer pdfRenderer = new PDFRenderer(document);
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int pageCount = document.getNumberOfPages();
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List<BufferedImage> images = new ArrayList<>();
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// Create images of all pages
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for (int i = 0; i < pageCount; i++) {
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images.add(pdfRenderer.renderImageWithDPI(i, DPI, colorType));
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}
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if (singleImage) {
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// Combine all images into a single big image
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BufferedImage combined = new BufferedImage(images.get(0).getWidth(), images.get(0).getHeight() * pageCount, BufferedImage.TYPE_INT_RGB);
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Graphics g = combined.getGraphics();
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for (int i = 0; i < images.size(); i++) {
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g.drawImage(images.get(i), 0, i * images.get(0).getHeight(), null);
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}
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images = Arrays.asList(combined);
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}
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// Create a ByteArrayOutputStream to save the image(s) to
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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if (singleImage) {
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// Write the image to the output stream
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ImageIO.write(images.get(0), imageType, baos);
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// Log that the image was successfully written to the byte array
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logger.info("Image successfully written to byte array");
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} else {
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// Zip the images and return as byte array
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try (ZipOutputStream zos = new ZipOutputStream(baos)) {
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for (int i = 0; i < images.size(); i++) {
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BufferedImage image = images.get(i);
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try (ByteArrayOutputStream baosImage = new ByteArrayOutputStream()) {
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ImageIO.write(image, imageType, baosImage);
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// Add the image to the zip file
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zos.putNextEntry(new ZipEntry(String.format(filename + "_%d.%s", i + 1, imageType.toLowerCase())));
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zos.write(baosImage.toByteArray());
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}
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}
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// Log that the images were successfully written to the byte array
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logger.info("Images successfully written to byte array as a zip");
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}
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}
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return baos.toByteArray();
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} catch (IOException e) {
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// Log an error message if there is an issue converting the PDF to an image
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logger.error("Error converting PDF to image", e);
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throw e;
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}
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}
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public static byte[] imageToPdf(MultipartFile[] files, boolean stretchToFit, boolean autoRotate, String colorType) throws IOException {
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try (PDDocument doc = new PDDocument()) {
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for (MultipartFile file : files) {
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String contentType = file.getContentType();
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String originalFilename = file.getOriginalFilename();
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if (originalFilename != null && (originalFilename.toLowerCase().endsWith(".tiff") || originalFilename.toLowerCase().endsWith(".tif")) ) {
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ImageReader reader = ImageIO.getImageReadersByFormatName("tiff").next();
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reader.setInput(ImageIO.createImageInputStream(file.getInputStream()));
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int numPages = reader.getNumImages(true);
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for (int i = 0; i < numPages; i++) {
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BufferedImage pageImage = reader.read(i);
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BufferedImage convertedImage = ImageProcessingUtils.convertColorType(pageImage, colorType);
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PDImageXObject pdImage = LosslessFactory.createFromImage(doc, convertedImage);
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addImageToDocument(doc, pdImage, stretchToFit, autoRotate);
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}
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} else {
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File imageFile = Files.createTempFile("image", ".png").toFile();
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try (FileOutputStream fos = new FileOutputStream(imageFile); InputStream input = file.getInputStream()) {
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byte[] buffer = new byte[1024];
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int len;
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while ((len = input.read(buffer)) != -1) {
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fos.write(buffer, 0, len);
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}
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BufferedImage image = ImageIO.read(imageFile);
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BufferedImage convertedImage = ImageProcessingUtils.convertColorType(image, colorType);
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PDImageXObject pdImage;
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if (contentType != null && (contentType.equals("image/jpeg"))) {
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pdImage = JPEGFactory.createFromImage(doc, convertedImage);
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} else {
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pdImage = LosslessFactory.createFromImage(doc, convertedImage);
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}
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addImageToDocument(doc, pdImage, stretchToFit, autoRotate);
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} catch (IOException e) {
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logger.error("Error writing image to file: {}", imageFile.getAbsolutePath(), e);
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throw e;
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} finally {
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imageFile.delete();
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}
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}
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}
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ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
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doc.save(byteArrayOutputStream);
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logger.info("PDF successfully saved to byte array");
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return byteArrayOutputStream.toByteArray();
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}
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}
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private static void addImageToDocument(PDDocument doc, PDImageXObject image, boolean stretchToFit, boolean autoRotate) throws IOException {
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boolean imageIsLandscape = image.getWidth() > image.getHeight();
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PDRectangle pageSize = PDRectangle.A4;
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if (autoRotate && imageIsLandscape) {
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pageSize = new PDRectangle(pageSize.getHeight(), pageSize.getWidth());
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}
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PDPage page = new PDPage(pageSize);
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doc.addPage(page);
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float pageWidth = page.getMediaBox().getWidth();
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float pageHeight = page.getMediaBox().getHeight();
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try (PDPageContentStream contentStream = new PDPageContentStream(doc, page)) {
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if (stretchToFit) {
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contentStream.drawImage(image, 0, 0, pageWidth, pageHeight);
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} else {
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float imageAspectRatio = (float) image.getWidth() / (float) image.getHeight();
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float pageAspectRatio = pageWidth / pageHeight;
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float scaleFactor = 1.0f;
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if (imageAspectRatio > pageAspectRatio) {
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scaleFactor = pageWidth / image.getWidth();
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} else {
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scaleFactor = pageHeight / image.getHeight();
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}
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float xPos = (pageWidth - (image.getWidth() * scaleFactor)) / 2;
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float yPos = (pageHeight - (image.getHeight() * scaleFactor)) / 2;
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contentStream.drawImage(image, xPos, yPos, image.getWidth() * scaleFactor, image.getHeight() * scaleFactor);
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}
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} catch (IOException e) {
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logger.error("Error adding image to PDF", e);
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throw e;
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}
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}
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public static byte[] overlayImage(byte[] pdfBytes, byte[] imageBytes, float x, float y, boolean everyPage) throws IOException {
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PDDocument document = PDDocument.load(new ByteArrayInputStream(pdfBytes));
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// Get the first page of the PDF
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int pages = document.getNumberOfPages();
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for (int i = 0; i < pages; i++) {
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PDPage page = document.getPage(i);
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try (PDPageContentStream contentStream = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.APPEND, true)) {
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// Create an image object from the image bytes
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PDImageXObject image = PDImageXObject.createFromByteArray(document, imageBytes, "");
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// Draw the image onto the page at the specified x and y coordinates
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contentStream.drawImage(image, x, y);
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logger.info("Image successfully overlayed onto PDF");
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if (!everyPage && i == 0) {
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break;
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}
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} catch (IOException e) {
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// Log an error message if there is an issue overlaying the image onto the PDF
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logger.error("Error overlaying image onto PDF", e);
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throw e;
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}
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}
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// Create a ByteArrayOutputStream to save the PDF to
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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document.save(baos);
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logger.info("PDF successfully saved to byte array");
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return baos.toByteArray();
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}
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}
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