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This commit is contained in:
Anthony Stirling
2023-12-30 19:11:27 +00:00
parent 7b43fca6fc
commit 5f771b7851
155 changed files with 5539 additions and 4767 deletions
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93
src/main/java/stirling/software/SPDF/controller/api/ToSinglePageController.java
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@@ -20,8 +20,10 @@ import org.springframework.web.bind.annotation.RestController;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
import stirling.software.SPDF.model.api.PDFFile;
import stirling.software.SPDF.utils.WebResponseUtils;
@RestController
@RequestMapping("/api/v1/general")
@Tag(name = "General", description = "General APIs")
@@ -29,58 +31,61 @@ public class ToSinglePageController {
private static final Logger logger = LoggerFactory.getLogger(ToSinglePageController.class);
@PostMapping(consumes = "multipart/form-data", value = "/pdf-to-single-page")
@Operation(
summary = "Convert a multi-page PDF into a single long page PDF",
description = "This endpoint converts a multi-page PDF document into a single paged PDF document. The width of the single page will be same as the input's width, but the height will be the sum of all the pages' heights. Input:PDF Output:PDF Type:SISO"
)
public ResponseEntity<byte[]> pdfToSinglePage(@ModelAttribute PDFFile request) throws IOException {
summary = "Convert a multi-page PDF into a single long page PDF",
description =
"This endpoint converts a multi-page PDF document into a single paged PDF document. The width of the single page will be same as the input's width, but the height will be the sum of all the pages' heights. Input:PDF Output:PDF Type:SISO")
public ResponseEntity<byte[]> pdfToSinglePage(@ModelAttribute PDFFile request)
throws IOException {
// Load the source document
PDDocument sourceDocument = PDDocument.load(request.getFileInput().getInputStream());
// Load the source document
PDDocument sourceDocument = PDDocument.load(request.getFileInput().getInputStream());
// Calculate total height and max width
float totalHeight = 0;
float maxWidth = 0;
for (PDPage page : sourceDocument.getPages()) {
PDRectangle pageSize = page.getMediaBox();
totalHeight += pageSize.getHeight();
maxWidth = Math.max(maxWidth, pageSize.getWidth());
}
// Calculate total height and max width
float totalHeight = 0;
float maxWidth = 0;
for (PDPage page : sourceDocument.getPages()) {
PDRectangle pageSize = page.getMediaBox();
totalHeight += pageSize.getHeight();
maxWidth = Math.max(maxWidth, pageSize.getWidth());
}
// Create new document and page with calculated dimensions
PDDocument newDocument = new PDDocument();
PDPage newPage = new PDPage(new PDRectangle(maxWidth, totalHeight));
newDocument.addPage(newPage);
// Create new document and page with calculated dimensions
PDDocument newDocument = new PDDocument();
PDPage newPage = new PDPage(new PDRectangle(maxWidth, totalHeight));
newDocument.addPage(newPage);
// Initialize the content stream of the new page
PDPageContentStream contentStream = new PDPageContentStream(newDocument, newPage);
contentStream.close();
LayerUtility layerUtility = new LayerUtility(newDocument);
float yOffset = totalHeight;
// Initialize the content stream of the new page
PDPageContentStream contentStream = new PDPageContentStream(newDocument, newPage);
contentStream.close();
// For each page, copy its content to the new page at the correct offset
for (PDPage page : sourceDocument.getPages()) {
PDFormXObject form = layerUtility.importPageAsForm(sourceDocument, sourceDocument.getPages().indexOf(page));
AffineTransform af = AffineTransform.getTranslateInstance(0, yOffset - page.getMediaBox().getHeight());
layerUtility.wrapInSaveRestore(newPage);
String defaultLayerName = "Layer" + sourceDocument.getPages().indexOf(page);
layerUtility.appendFormAsLayer(newPage, form, af, defaultLayerName);
yOffset -= page.getMediaBox().getHeight();
}
LayerUtility layerUtility = new LayerUtility(newDocument);
float yOffset = totalHeight;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
newDocument.save(baos);
newDocument.close();
sourceDocument.close();
// For each page, copy its content to the new page at the correct offset
for (PDPage page : sourceDocument.getPages()) {
PDFormXObject form =
layerUtility.importPageAsForm(
sourceDocument, sourceDocument.getPages().indexOf(page));
AffineTransform af =
AffineTransform.getTranslateInstance(
0, yOffset - page.getMediaBox().getHeight());
layerUtility.wrapInSaveRestore(newPage);
String defaultLayerName = "Layer" + sourceDocument.getPages().indexOf(page);
layerUtility.appendFormAsLayer(newPage, form, af, defaultLayerName);
yOffset -= page.getMediaBox().getHeight();
}
byte[] result = baos.toByteArray();
return WebResponseUtils.bytesToWebResponse(result, request.getFileInput().getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_singlePage.pdf");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
newDocument.save(baos);
newDocument.close();
sourceDocument.close();
byte[] result = baos.toByteArray();
return WebResponseUtils.bytesToWebResponse(
result,
request.getFileInput().getOriginalFilename().replaceFirst("[.][^.]+$", "")
+ "_singlePage.pdf");
}
}
}