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Split pages support n function and other stuff

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This commit is contained in:
Anthony Stirling 2023-06-03 22:56:15 +01:00
parent 4594765cbd
commit c526e18992
16 changed files with 2682 additions and 119 deletions
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45
.github/workflows/swagger.yml vendored Normal file
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@ -0,0 +1,45 @@
name: Update Swagger
on:
workflow_dispatch:
push:
branches:
- master
jobs:
push:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3.5.2
- name: Set up JDK 17
uses: actions/setup-java@v3.11.0
with:
java-version: '17'
distribution: 'temurin'
- name: Grant execute permission for gradlew
run: chmod +x gradlew
- name: Generate Swagger documentation
run: ./gradlew generateOpenApiDocs
- name: Get version number
id: versionNumber
run: echo "::set-output name=versionNumber::$(./gradlew printVersion --quiet | tail -1)"
- name: Commit and push if it changed
run: |
git config --local user.email "action@github.com"
git config --local user.name "GitHub Action"
git add -A
git diff --quiet && git diff --staged --quiet || git commit -m "Updated Swagger documentation"
git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git
git push
- name: Upload Swagger Documentation to SwaggerHub
run: |
curl -X POST -H "Authorization: ${SWAGGERHUB_API_KEY}" -H "Content-Type: application/json" -d @SwaggerDoc.json "https://api.swaggerhub.com/apis/Frooodle/Stirling-PDF/${{ steps.versionNumber.outputs.versionNumber }}?isPrivate=false&force=true"
env:
SWAGGERHUB_API_KEY: ${{ secrets.SWAGGERHUB_API_KEY }}

1
.gitignore vendored
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@ -14,6 +14,7 @@ local.properties
.recommenders
.classpath
.project
version.properties
# Gradle
.gradle

2329
SwaggerDoc.json Normal file
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File diff suppressed because it is too large Load diff

19
build.gradle
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@ -2,6 +2,7 @@ plugins {
id 'java'
id 'org.springframework.boot' version '3.1.0'
id 'io.spring.dependency-management' version '1.1.0'
id 'org.springdoc.openapi-gradle-plugin' version '1.6.0'
}
group = 'stirling.software'
@ -12,6 +13,12 @@ repositories {
mavenCentral()
}
openApi {
apiDocsUrl = "http://localhost:8080/v3/api-docs"
outputDir = file("/")
outputFileName = "SwaggerDoc.json"
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-web:3.1.0'
implementation 'org.springframework.boot:spring-boot-starter-thymeleaf:3.1.0'
@ -34,6 +41,18 @@ dependencies {
}
task writeVersion {
def propsFile = file('src/main/resources/version.properties')
def props = new Properties()
props.setProperty('version', version)
props.store(propsFile.newWriter(), null)
}
tasks.matching { it.name == 'generateOpenApiDocs' }.all {
dependsOn writeVersion
}
jar {
enabled = false
manifest {

30
src/main/java/stirling/software/SPDF/config/OpenApiConfig.java
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@ -1,5 +1,9 @@
package stirling.software.SPDF.config;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@ -10,13 +14,23 @@ import io.swagger.v3.oas.models.info.Info;
@Configuration
public class OpenApiConfig {
@Bean
public OpenAPI customOpenAPI() {
String version = getClass().getPackage().getImplementationVersion();
version = (version != null) ? version : "1.0.0";
return new OpenAPI().components(new Components()).info(
new Info().title("Stirling PDF API").version(version).description("API documentation for all Server-Side processing.\nPlease note some functionality might be UI only and missing from here."));
}
@Bean
public OpenAPI customOpenAPI() {
String version = getClass().getPackage().getImplementationVersion();
if (version == null) {
Properties props = new Properties();
try (InputStream input = getClass().getClassLoader().getResourceAsStream("version.properties")) {
props.load(input);
version = props.getProperty("version");
} catch (IOException ex) {
ex.printStackTrace();
version = "1.0.0"; // default version if all else fails
}
}
return new OpenAPI().components(new Components()).info(
new Info().title("Stirling PDF API").version(version).description("API documentation for all Server-Side processing.\nPlease note some functionality might be UI only and missing from here."));
}
}

74
src/main/java/stirling/software/SPDF/controller/api/RearrangePagesPDFController.java
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@ -1,16 +1,8 @@
package stirling.software.SPDF.controller.api;
import java.io.IOException;
import io.swagger.v3.oas.annotations.media.Schema;
import stirling.software.SPDF.utils.WebResponseUtils;
import java.util.ArrayList;
import java.util.List;
import javax.script.ScriptEngineManager;
import javax.script.ScriptEngine;
import javax.script.ScriptException;
import javax.script.ScriptEngine;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
@ -25,6 +17,9 @@ 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.media.Schema;
import stirling.software.SPDF.utils.GeneralUtils;
import stirling.software.SPDF.utils.WebResponseUtils;
@RestController
public class RearrangePagesPDFController {
@ -43,7 +38,7 @@ public class RearrangePagesPDFController {
// Split the page order string into an array of page numbers or range of numbers
String[] pageOrderArr = pagesToDelete.split(",");
List<Integer> pagesToRemove = pageOrderToString(pageOrderArr, document.getNumberOfPages());
List<Integer> pagesToRemove = GeneralUtils.parsePageList(pageOrderArr, document.getNumberOfPages());
for (int i = pagesToRemove.size() - 1; i >= 0; i--) {
int pageIndex = pagesToRemove.get(i);
@ -180,7 +175,7 @@ public class RearrangePagesPDFController {
if (customMode != null && customMode.length() > 0) {
newPageOrder = processCustomMode(customMode, totalPages);
} else {
newPageOrder = pageOrderToString(pageOrderArr, totalPages);
newPageOrder = GeneralUtils.parsePageList(pageOrderArr, totalPages);
}
// Create a new list to hold the pages in the new order
@ -207,63 +202,6 @@ public class RearrangePagesPDFController {
}
}
private List<Integer> pageOrderToString(String[] pageOrderArr, int totalPages) {
List<Integer> newPageOrder = new ArrayList<>();
// loop through the page order array
for (String element : pageOrderArr) {
// check if the element contains a range of pages
if (element.matches("\\d*n\\+?-?\\d*|\\d*\\+?n")) {
// Handle page order as a function
int coefficient = 0;
int constant = 0;
boolean coefficientExists = false;
boolean constantExists = false;
if (element.contains("n")) {
String[] parts = element.split("n");
if (!parts[0].equals("") && parts[0] != null) {
coefficient = Integer.parseInt(parts[0]);
coefficientExists = true;
}
if (parts.length > 1 && !parts[1].equals("") && parts[1] != null) {
constant = Integer.parseInt(parts[1]);
constantExists = true;
}
} else if (element.contains("+")) {
constant = Integer.parseInt(element.replace("+", ""));
constantExists = true;
}
for (int i = 1; i <= totalPages; i++) {
int pageNum = coefficientExists ? coefficient * i : i;
pageNum += constantExists ? constant : 0;
if (pageNum <= totalPages && pageNum > 0) {
newPageOrder.add(pageNum - 1);
}
}
} else if (element.contains("-")) {
// split the range into start and end page
String[] range = element.split("-");
int start = Integer.parseInt(range[0]);
int end = Integer.parseInt(range[1]);
// check if the end page is greater than total pages
if (end > totalPages) {
end = totalPages;
}
// loop through the range of pages
for (int j = start; j <= end; j++) {
// print the current index
newPageOrder.add(j - 1);
}
} else {
// if the element is a single page
newPageOrder.add(Integer.parseInt(element) - 1);
}
}
return newPageOrder;
}
}

139
src/main/java/stirling/software/SPDF/controller/api/ScalePagesController.java
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@ -3,10 +3,18 @@ package stirling.software.SPDF.controller.api;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
@ -20,14 +28,17 @@ import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.kernel.pdf.canvas.parser.EventType;
import com.itextpdf.kernel.pdf.canvas.parser.PdfCanvasProcessor;
import com.itextpdf.kernel.pdf.canvas.parser.data.IEventData;
import com.itextpdf.kernel.pdf.canvas.parser.data.TextRenderInfo;
import com.itextpdf.kernel.pdf.canvas.parser.listener.IEventListener;
import com.itextpdf.kernel.pdf.xobject.PdfFormXObject;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.media.Schema;
import stirling.software.SPDF.utils.WebResponseUtils;
import java.util.HashMap;
import java.util.Map;
@RestController
public class ScalePagesController {
@ -119,4 +130,128 @@ public class ScalePagesController {
pdfDoc.close();
return WebResponseUtils.bytesToWebResponse(pdfContent, file.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_scaled.pdf");
}
@PostMapping(value = "/auto-crop", consumes = "multipart/form-data")
public ResponseEntity<byte[]> cropPdf(@RequestParam("fileInput") MultipartFile file) throws IOException {
byte[] bytes = file.getBytes();
PdfReader reader = new PdfReader(new ByteArrayInputStream(bytes));
PdfDocument pdfDoc = new PdfDocument(reader);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PdfWriter writer = new PdfWriter(baos);
PdfDocument outputPdf = new PdfDocument(writer);
int totalPages = pdfDoc.getNumberOfPages();
for (int i = 1; i <= totalPages; i++) {
PdfPage page = pdfDoc.getPage(i);
Rectangle originalMediaBox = page.getMediaBox();
Rectangle contentBox = determineContentBox(page);
// Make sure we don't go outside the original media box.
Rectangle intersection = originalMediaBox.getIntersection(contentBox);
page.setCropBox(intersection);
// Copy page to the new document
outputPdf.addPage(page.copyTo(outputPdf));
}
outputPdf.close();
byte[] pdfContent = baos.toByteArray();
pdfDoc.close();
return ResponseEntity.ok()
.header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + file.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_cropped.pdf\"")
.contentType(MediaType.APPLICATION_PDF)
.body(pdfContent);
}
private Rectangle determineContentBox(PdfPage page) {
// Extract the text from the page and find the bounding box.
TextBoundingRectangleFinder finder = new TextBoundingRectangleFinder();
PdfCanvasProcessor processor = new PdfCanvasProcessor(finder);
processor.processPageContent(page);
return finder.getBoundingBox();
}
private static class TextBoundingRectangleFinder implements IEventListener {
private List<Rectangle> allTextBoxes = new ArrayList<>();
public Rectangle getBoundingBox() {
// Sort the text boxes based on their vertical position
allTextBoxes.sort(Comparator.comparingDouble(Rectangle::getTop));
// Consider a box an outlier if its top is more than 1.5 times the IQR above the third quartile.
int q1Index = allTextBoxes.size() / 4;
int q3Index = 3 * allTextBoxes.size() / 4;
double iqr = allTextBoxes.get(q3Index).getTop() - allTextBoxes.get(q1Index).getTop();
double threshold = allTextBoxes.get(q3Index).getTop() + 1.5 * iqr;
// Initialize boundingBox to the first non-outlier box
int i = 0;
while (i < allTextBoxes.size() && allTextBoxes.get(i).getTop() > threshold) {
i++;
}
if (i == allTextBoxes.size()) {
// If all boxes are outliers, just return the first one
return allTextBoxes.get(0);
}
Rectangle boundingBox = allTextBoxes.get(i);
// Extend the bounding box to include all non-outlier boxes
for (; i < allTextBoxes.size(); i++) {
Rectangle textBoundingBox = allTextBoxes.get(i);
if (textBoundingBox.getTop() > threshold) {
// This box is an outlier, skip it
continue;
}
float left = Math.min(boundingBox.getLeft(), textBoundingBox.getLeft());
float bottom = Math.min(boundingBox.getBottom(), textBoundingBox.getBottom());
float right = Math.max(boundingBox.getRight(), textBoundingBox.getRight());
float top = Math.max(boundingBox.getTop(), textBoundingBox.getTop());
// Add a small padding around the bounding box
float padding = 10;
boundingBox = new Rectangle(left - padding, bottom - padding, right - left + 2 * padding, top - bottom + 2 * padding);
}
return boundingBox;
}
@Override
public void eventOccurred(IEventData data, EventType type) {
if (type == EventType.RENDER_TEXT) {
TextRenderInfo renderInfo = (TextRenderInfo) data;
allTextBoxes.add(renderInfo.getBaseline().getBoundingRectangle());
}
}
@Override
public Set<EventType> getSupportedEvents() {
return Collections.singleton(EventType.RENDER_TEXT);
}
}
}

34
src/main/java/stirling/software/SPDF/controller/api/SplitPDFController.java
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@ -6,7 +6,6 @@ import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.zip.ZipEntry;
@ -29,6 +28,7 @@ import org.springframework.web.multipart.MultipartFile;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import stirling.software.SPDF.utils.GeneralUtils;
@RestController
public class SplitPDFController {
@ -58,39 +58,28 @@ public class SplitPDFController {
pageNumbers.add(i);
}
} else {
List<String> pageNumbersStr = new ArrayList<>(Arrays.asList(pages.split(",")));
if (!pageNumbersStr.contains(String.valueOf(document.getNumberOfPages()))) {
String lastpage = String.valueOf(document.getNumberOfPages());
pageNumbersStr.add(lastpage);
}
for (String page : pageNumbersStr) {
if (page.contains("-")) {
String[] range = page.split("-");
int start = Integer.parseInt(range[0]);
int end = Integer.parseInt(range[1]);
for (int i = start; i <= end; i++) {
pageNumbers.add(i);
}
} else {
pageNumbers.add(Integer.parseInt(page));
}
String[] splitPoints = pages.split(",");
for (String splitPoint : splitPoints) {
List<Integer> orderedPages = GeneralUtils.parsePageList(new String[] {splitPoint}, document.getNumberOfPages());
pageNumbers.addAll(orderedPages);
}
// Add the last page as a split point
pageNumbers.add(document.getNumberOfPages() - 1);
}
logger.info("Splitting PDF into pages: {}", pageNumbers.stream().map(String::valueOf).collect(Collectors.joining(",")));
// split the document
List<ByteArrayOutputStream> splitDocumentsBoas = new ArrayList<>();
int currentPage = 0;
for (int pageNumber : pageNumbers) {
int previousPageNumber = 0;
for (int splitPoint : pageNumbers) {
try (PDDocument splitDocument = new PDDocument()) {
for (int i = currentPage; i < pageNumber; i++) {
for (int i = previousPageNumber; i <= splitPoint; i++) {
PDPage page = document.getPage(i);
splitDocument.addPage(page);
logger.debug("Adding page {} to split document", i);
}
currentPage = pageNumber;
logger.debug("Setting current page to {}", currentPage);
previousPageNumber = splitPoint + 1;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
splitDocument.save(baos);
@ -102,6 +91,7 @@ public class SplitPDFController {
}
}
// closing the original document
document.close();

5
src/main/java/stirling/software/SPDF/controller/api/security/CertSignController.java
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@ -1,9 +1,6 @@
package stirling.software.SPDF.controller.api.security;
import java.io.ByteArrayInputStream;
import io.swagger.v3.oas.annotations.media.Schema;
import stirling.software.SPDF.utils.WebResponseUtils;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
@ -53,6 +50,8 @@ import com.itextpdf.signatures.SignatureUtil;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.media.Schema;
import stirling.software.SPDF.utils.WebResponseUtils;
@RestController
public class CertSignController {

7
src/main/java/stirling/software/SPDF/controller/web/OtherWebController.java
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@ -122,4 +122,11 @@ public class OtherWebController {
return "other/scale-pages";
}
@GetMapping("/auto-crop")
@Hidden
public String autoCropForm(Model model) {
model.addAttribute("currentPage", "auto-crop");
return "other/auto-crop";
}
}

61
src/main/java/stirling/software/SPDF/utils/GeneralUtils.java
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@ -1,5 +1,8 @@
package stirling.software.SPDF.utils;
import java.util.ArrayList;
import java.util.List;
public class GeneralUtils {
public static Long convertSizeToBytes(String sizeStr) {
@ -27,4 +30,62 @@ public class GeneralUtils {
return null;
}
public static List<Integer> parsePageList(String[] pageOrderArr, int totalPages) {
List<Integer> newPageOrder = new ArrayList<>();
// loop through the page order array
for (String element : pageOrderArr) {
// check if the element contains a range of pages
if (element.matches("\\d*n\\+?-?\\d*|\\d*\\+?n")) {
// Handle page order as a function
int coefficient = 0;
int constant = 0;
boolean coefficientExists = false;
boolean constantExists = false;
if (element.contains("n")) {
String[] parts = element.split("n");
if (!parts[0].equals("") && parts[0] != null) {
coefficient = Integer.parseInt(parts[0]);
coefficientExists = true;
}
if (parts.length > 1 && !parts[1].equals("") && parts[1] != null) {
constant = Integer.parseInt(parts[1]);
constantExists = true;
}
} else if (element.contains("+")) {
constant = Integer.parseInt(element.replace("+", ""));
constantExists = true;
}
for (int i = 1; i <= totalPages; i++) {
int pageNum = coefficientExists ? coefficient * i : i;
pageNum += constantExists ? constant : 0;
if (pageNum <= totalPages && pageNum > 0) {
newPageOrder.add(pageNum - 1);
}
}
} else if (element.contains("-")) {
// split the range into start and end page
String[] range = element.split("-");
int start = Integer.parseInt(range[0]);
int end = Integer.parseInt(range[1]);
// check if the end page is greater than total pages
if (end > totalPages) {
end = totalPages;
}
// loop through the range of pages
for (int j = start; j <= end; j++) {
// print the current index
newPageOrder.add(j - 1);
}
} else {
// if the element is a single page
newPageOrder.add(Integer.parseInt(element) - 1);
}
}
return newPageOrder;
}
}

6
src/main/java/stirling/software/SPDF/utils/PdfUtils.java
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@ -9,12 +9,6 @@ import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.security.KeyPair;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

9
src/main/resources/messages_en_GB.properties
View file

@ -54,14 +54,11 @@ home.pdfOrganiser.title=Organise
home.pdfOrganiser.desc=Remove/Rearrange pages in any order
home.addImage.title=Add image
home.addImage.desc=Adds a image onto a set location on the PDF (Work in progress)
home.addImage.desc=Adds a image onto a set location on the PDF
home.watermark.title=Add Watermark
home.watermark.desc=Add a custom watermark to your PDF document.
home.remove-watermark.title=Remove Watermark
home.remove-watermark.desc=Remove watermarks from your PDF document.
home.permissions.title=Change Permissions
home.permissions.desc=Change the permissions of your PDF document
@ -131,8 +128,8 @@ home.certSign.desc=Signs a PDF with a Certificate/Key (PEM/P12)
home.pageLayout.title=Multi-Page Layout
home.pageLayout.desc=Merge multiple pages of a PDF document into a single page
home.scalePages.title=Adjust page-scale
home.scalePages.desc=Change the size of page contents while maintaining a set page-size
home.scalePages.title=Adjust page size/scale
home.scalePages.desc=Change the size/scale of page and/or its contents.
error.pdfPassword=The PDF Document is passworded and either the password was not provided or was incorrect

8
src/main/resources/static/js/downloader.js
View file

@ -14,7 +14,7 @@ $(document).ready(function() {
const files = $('#fileInput-input')[0].files;
const formData = new FormData(this);
const override = $('#override').val() || '';
const originalButtonText = $('#submitBtn').text();
$('#submitBtn').text('Processing...');
try {
@ -24,10 +24,10 @@ $(document).ready(function() {
await handleSingleDownload(url, formData);
}
$('#submitBtn').text('Submit');
$('#submitBtn').text(originalButtonText);
} catch (error) {
handleDownloadError(error);
$('#submitBtn').text('Submit');
$('#submitBtn').text(originalButtonText);
console.error(error);
}
});
@ -83,7 +83,7 @@ async function handleJsonResponse(response) {
const json = await response.json();
const errorMessage = JSON.stringify(json, null, 2);
if (errorMessage.toLowerCase().includes('the password is incorrect') || errorMessage.toLowerCase().includes('Password is not provided') || errorMessage.toLowerCase().includes('PDF contains an encryption dictionary')) {
alert('[[#{error.pdfPassword}]]');
alert(pdfPasswordPrompt);
} else {
showErrorBanner(json.error + ':' + json.message, json.trace);
}

3
src/main/resources/templates/fragments/common.html
View file

@ -91,6 +91,9 @@
</th:block>
<th:block th:fragment="fileSelector(name, multiple)" th:with="accept=${accept} ?: '*/*', inputText=${inputText} ?: #{pdfPrompt}, remoteCall=${remoteCall} ?: 'true', notRequired=${notRequired} ?: false">
<script th:inline="javascript">
const pdfPasswordPrompt = /*[[#{error.pdfPassword}]]]*/ '';
</script>
<script src="js/downloader.js"></script>
<div class="custom-file-chooser">

31
src/main/resources/templates/other/auto-crop.html Normal file
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@ -0,0 +1,31 @@
<!DOCTYPE html>
<html th:lang="${#locale.toString()}" th:lang-direction="#{language.direction}" xmlns:th="http://www.thymeleaf.org">
<th:block th:insert="~{fragments/common :: head(title=#{autoCrop.title})}"></th:block>
<body>
<th:block th:insert="~{fragments/common :: game}"></th:block>
<div id="page-container">
<div id="content-wrap">
<div th:insert="~{fragments/navbar.html :: navbar}"></div>
<br> <br>
<div class="container">
<div class="row justify-content-center">
<div class="col-md-6">
<h2 th:text="#{autoCrop.header}"></h2>
<form method="post" enctype="multipart/form-data" th:action="@{auto-crop}">
<div th:replace="~{fragments/common :: fileSelector(name='fileInput', multiple=false, accept='application/pdf')}"></div>
<br>
<button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{autoCrop.submit}"></button>
</form>
<p class="mt-3" th:text="#{autoCrop.credit}"></p>
</div>
</div>
</div>
</div>
<div th:insert="~{fragments/footer.html :: footer}"></div>
</div>
</body>
</html>