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page numbers and custom images

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This commit is contained in:
Anthony Stirling
2023-07-04 21:45:35 +01:00
parent 3c54429fe0
commit f92482d89e
16 changed files with 317 additions and 8 deletions
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4
src/main/java/stirling/software/SPDF/controller/api/ScalePagesController.java
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@@ -52,11 +52,11 @@ public class ScalePagesController {
@Operation(summary = "Change the size of a PDF page/document", description = "This operation takes an input PDF file and the size to scale the pages to in the output PDF file. Input:PDF Output:PDF Type:SISO")
public ResponseEntity<byte[]> scalePages(
@Parameter(description = "The input PDF file", required = true) @RequestParam("fileInput") MultipartFile file,
@Parameter(description = "The scale of pages in the output PDF. Acceptable values are A0-A10, B0-B9, LETTER, TABLOID, LEDGER, LEGAL, EXECUTIVE.", required = true, schema = @Schema(type = "String", allowableValues = {
@Parameter(description = "The scale of pages in the output PDF. Acceptable values are A0-A10, B0-B9, LETTER, TABLOID, LEDGER, LEGAL, EXECUTIVE.", required = true, schema = @Schema(type = "string", allowableValues = {
"A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9", "A10", "B0", "B1", "B2", "B3", "B4",
"B5", "B6", "B7", "B8", "B9", "LETTER", "TABLOID", "LEDGER", "LEGAL",
"EXECUTIVE" })) @RequestParam("pageSize") String targetPageSize,
@Parameter(description = "The scale of the content on the pages of the output PDF. Acceptable values are floats.", required = true, schema = @Schema(type = "float")) @RequestParam("scaleFactor") float scaleFactor)
@Parameter(description = "The scale of the content on the pages of the output PDF. Acceptable values are floats.", required = true, schema = @Schema(type = "integer")) @RequestParam("scaleFactor") float scaleFactor)
throws IOException {
Map<String, PageSize> sizeMap = new HashMap<>();

9
src/main/java/stirling/software/SPDF/controller/api/other/CompressController.java
View File

@@ -221,6 +221,15 @@ public class CompressController {
// Read the optimized PDF file
byte[] pdfBytes = Files.readAllBytes(tempOutputFile);
// Check if optimized file is larger than the original
if(pdfBytes.length > inputFileSize) {
// Log the occurrence
logger.warn("Optimized file is larger than the original. Returning the original file instead.");
// Read the original file again
pdfBytes = Files.readAllBytes(tempInputFile);
}
// Clean up the temporary files
Files.delete(tempInputFile);
Files.delete(tempOutputFile);

176
src/main/java/stirling/software/SPDF/controller/api/other/PageNumbersController.java Normal file
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@@ -0,0 +1,176 @@
package stirling.software.SPDF.controller.api.other;
import java.io.IOException;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RequestPart;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.tags.Tag;
import stirling.software.SPDF.utils.GeneralUtils;
import stirling.software.SPDF.utils.PdfUtils;
import stirling.software.SPDF.utils.WebResponseUtils;
import org.apache.pdfbox.pdmodel.*;
import org.apache.pdfbox.pdmodel.common.*;
import org.apache.pdfbox.pdmodel.PDPageContentStream.*;
import org.springframework.web.bind.annotation.*;
import org.springframework.http.*;
import org.springframework.web.multipart.MultipartFile;
import io.swagger.v3.oas.annotations.*;
import io.swagger.v3.oas.annotations.media.*;
import io.swagger.v3.oas.annotations.parameters.*;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.tomcat.util.http.ResponseUtil;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import com.itextpdf.io.font.constants.StandardFonts;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.layout.Canvas;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.properties.TextAlignment;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.media.Schema;
import java.io.*;
@RestController
@Tag(name = "Other", description = "Other APIs")
public class PageNumbersController {
private static final Logger logger = LoggerFactory.getLogger(PageNumbersController.class);
@PostMapping(value = "/add-page-numbers", consumes = "multipart/form-data")
@Operation(summary = "Add page numbers to a PDF document", description = "This operation takes an input PDF file and adds page numbers to it. Input:PDF Output:PDF Type:SISO")
public ResponseEntity<byte[]> addPageNumbers(
@Parameter(description = "The input PDF file", required = true) @RequestParam("fileInput") MultipartFile file,
@Parameter(description = "Custom margin: small/medium/large", required = true, schema = @Schema(type = "string", allowableValues = {"small", "medium", "large"})) @RequestParam("customMargin") String customMargin,
@Parameter(description = "Position: 1 of 9 positions", required = true, schema = @Schema(type = "integer", minimum = "1", maximum = "9")) @RequestParam("position") int position,
@Parameter(description = "Starting number", required = true, schema = @Schema(type = "integer", minimum = "1")) @RequestParam("startingNumber") int startingNumber,
@Parameter(description = "Which pages to number, default all", required = false, schema = @Schema(type = "string")) @RequestParam(value = "pagesToNumber", required = false) String pagesToNumber,
@Parameter(description = "Custom text: defaults to just number but can have things like \"Page {n} of {p}\"", required = false, schema = @Schema(type = "string")) @RequestParam(value = "customText", required = false) String customText)
throws IOException {
byte[] fileBytes = file.getBytes();
ByteArrayInputStream bais = new ByteArrayInputStream(fileBytes);
int pageNumber = startingNumber;
float marginFactor;
switch (customMargin.toLowerCase()) {
case "small":
marginFactor = 0.01f;
break;
case "medium":
marginFactor = 0.025f;
break;
case "large":
marginFactor = 0.05f;
break;
case "x-large":
marginFactor = 0.1f;
break;
default:
marginFactor = 0.01f;
break;
}
float fontSize = 12.0f;
PdfReader reader = new PdfReader(bais);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PdfWriter writer = new PdfWriter(baos);
PdfDocument pdfDoc = new PdfDocument(reader, writer);
List<Integer> pagesToNumberList = GeneralUtils.parsePageList(pagesToNumber.split(","), pdfDoc.getNumberOfPages());
for (int i : pagesToNumberList) {
PdfPage page = pdfDoc.getPage(i+1);
Rectangle pageSize = page.getPageSize();
PdfCanvas pdfCanvas = new PdfCanvas(page.newContentStreamBefore(), page.getResources(), pdfDoc);
String text = customText != null ? customText.replace("{n}", String.valueOf(pageNumber)).replace("{p}", String.valueOf(pdfDoc.getNumberOfPages())) : String.valueOf(pageNumber);
PdfFont font = PdfFontFactory.createFont(StandardFonts.HELVETICA);
float textWidth = font.getWidth(text, fontSize);
float textHeight = font.getAscent(text, fontSize) - font.getDescent(text, fontSize);
float x, y;
TextAlignment alignment;
int xGroup = (position - 1) % 3;
int yGroup = 2 - (position - 1) / 3;
switch (xGroup) {
case 0: // left
x = pageSize.getLeft() + marginFactor * pageSize.getWidth();
alignment = TextAlignment.LEFT;
break;
case 1: // center
x = pageSize.getLeft() + (pageSize.getWidth()) / 2;
alignment = TextAlignment.CENTER;
break;
default: // right
x = pageSize.getRight() - marginFactor * pageSize.getWidth();
alignment = TextAlignment.RIGHT;
break;
}
switch (yGroup) {
case 0: // bottom
y = pageSize.getBottom() + marginFactor * pageSize.getHeight();
break;
case 1: // middle
y = pageSize.getBottom() + (pageSize.getHeight() ) / 2;
break;
default: // top
y = pageSize.getTop() - marginFactor * pageSize.getHeight();
break;
}
new Canvas(pdfCanvas, page.getPageSize())
.showTextAligned(new Paragraph(text).setFont(font).setFontSize(fontSize), x, y, alignment);
pageNumber++;
}
pdfDoc.close();
byte[] resultBytes = baos.toByteArray();
return ResponseEntity.ok()
.header("Content-Type", "application/pdf; charset=UTF-8")
.header("Content-Disposition", "inline; filename=" + URLEncoder.encode(file.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_numbersAdded.pdf", "UTF-8"))
.body(resultBytes);
}
}

7
src/main/java/stirling/software/SPDF/controller/web/OtherWebController.java
View File

@@ -32,6 +32,13 @@ public class OtherWebController {
return modelAndView;
}
@GetMapping("/add-page-numbers")
@Hidden
public String addPageNumbersForm(Model model) {
model.addAttribute("currentPage", "add-page-numbers");
return "other/add-page-numbers";
}
@GetMapping("/extract-images")
@Hidden
public String extractImagesForm(Model model) {