DGNum/Stirling-PDF
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Created a page for visually editing individual pages of a pdf

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Saud Fatayerji 2023-04-18 05:08:38 +03:00
parent f762ab6aa7
commit 2762459acf
5 changed files with 418 additions and 0 deletions
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20
src/main/java/stirling/software/SPDF/controller/PageManagerController.java Normal file
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@ -0,0 +1,20 @@
package stirling.software.SPDF.controller;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
@Controller
public class PageManagerController {
private static final Logger logger = LoggerFactory.getLogger(PageManagerController.class);
@GetMapping("/page-manager")
public String hello(Model model) {
model.addAttribute("currentPage", "page-manager");
return "page-manager";
}
}

4
src/main/resources/messages_en_GB.properties
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@ -179,6 +179,10 @@ pdfOrganiser.title=Page Organiser
pdfOrganiser.header=PDF Page Organiser
pdfOrganiser.submit=Rearrange Pages
#pageManager
pageManager.title=Page Manager
pageManager.header=PDF Page Manager
#pageRemover
pageRemover.title=Page Remover

16
src/main/resources/static/pdf-lib.min.js vendored Normal file
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3
src/main/resources/templates/fragments/common.html
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@ -22,6 +22,9 @@
<!-- PDF.js -->
<script src="pdfjs/pdf.js"></script>
<!-- PDF-Lib -->
<script src="pdf-lib.min.js"></script>
<!-- Custom -->
<link rel="stylesheet" href="css/general.css">
<link rel="stylesheet" th:href="@{css/dark-mode.css}" id="dark-mode-styles">

375
src/main/resources/templates/page-manager.html Normal file
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<!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=#{pageManager.title})}"></th:block>
<body>
<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" style="text-align: center">
<h2 th:text="#{pageManager.header}"></h2>
<div id="global-buttons-container">
<button class="btn btn-primary" onclick="addPdfs()">
<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-file-earmark-plus" viewBox="0 0 16 16">
<path d="M8 6.5a.5.5 0 0 1 .5.5v1.5H10a.5.5 0 0 1 0 1H8.5V11a.5.5 0 0 1-1 0V9.5H6a.5.5 0 0 1 0-1h1.5V7a.5.5 0 0 1 .5-.5z"/>
<path d="M14 4.5V14a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V2a2 2 0 0 1 2-2h5.5L14 4.5zm-3 0A1.5 1.5 0 0 1 9.5 3V1H4a1 1 0 0 0-1 1v12a1 1 0 0 0 1 1h8a1 1 0 0 0 1-1V4.5h-2z"/>
</svg>
</button>
<button class="btn btn-secondary" onclick="rotateAll(-90)">
<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-arrow-counterclockwise" viewBox="0 0 16 16">
<path fill-rule="evenodd" d="M8 3a5 5 0 1 1-4.546 2.914.5.5 0 0 0-.908-.417A6 6 0 1 0 8 2v1z" />
<path d="M8 4.466V.534a.25.25 0 0 0-.41-.192L5.23 2.308a.25.25 0 0 0 0 .384l2.36 1.966A.25.25 0 0 0 8 4.466z" />
</svg>
</button>
<button class="btn btn-secondary" onclick="rotateAll(90)">
<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-arrow-clockwise" viewBox="0 0 16 16">
<path fill-rule="evenodd" d="M8 3a5 5 0 1 0 4.546 2.914.5.5 0 0 1 .908-.417A6 6 0 1 1 8 2v1z" />
<path d="M8 4.466V.534a.25.25 0 0 1 .41-.192l2.36 1.966c.12.1.12.284 0 .384L8.41 4.658A.25.25 0 0 1 8 4.466z" />
</svg>
</button>
<button id="export-button" class="btn btn-primary" onclick="exportPdf()">
<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-download" viewBox="0 0 16 16">
<path d="M.5 9.9a.5.5 0 0 1 .5.5v2.5a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1v-2.5a.5.5 0 0 1 1 0v2.5a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2v-2.5a.5.5 0 0 1 .5-.5z"/>
<path d="M7.646 11.854a.5.5 0 0 0 .708 0l3-3a.5.5 0 0 0-.708-.708L8.5 10.293V1.5a.5.5 0 0 0-1 0v8.793L5.354 8.146a.5.5 0 1 0-.708.708l3 3z"/>
</svg>
</button>
</div>
<div id="pages-container"></div>
</div>
</div>
</div>
</div>
<div th:insert="~{fragments/footer.html :: footer}"></div>
</div>
<script>
var myDocument = null;
var myRenderer = null;
const pagesContainer = document.getElementById("pages-container");
function addPdfs() {
var input = document.createElement('input');
input.type = 'file';
input.multiple = true;
input.onchange = async(e) => {
const files = e.target.files;
for (var i=0; i < files.length; i++) {
addPdfFile(files[i]);
}
}
input.click();
}
async function addPdfFile(file) {
const { renderer, pdfDocument } = await loadFile(file);
for (var i=0; i < renderer.pageCount; i++) {
const div = document.createElement('div');
div.classList.add("page-container");
var img = document.createElement('img');
img.src = await renderer.renderPage(i);
img.pageIdx = i;
img.rend = renderer;
img.doc = pdfDocument;
div.appendChild(img);
const buttonContainer = document.createElement('div');
buttonContainer.classList.add("button-container");
const moveUp = document.createElement('button');
moveUp.classList.add("move-up-button","btn", "btn-secondary");
moveUp.innerHTML = '<i class="bi bi-arrow-up-short"></i>';
moveUp.onclick = e => {
var imgContainer = e.target;
while (!imgContainer.classList.contains("page-container")) {
imgContainer = imgContainer.parentNode;
}
console.log("imgContainer", imgContainer);
const sibling = imgContainer.previousSibling;
console.log("sibling", sibling);
if (sibling) {
pagesContainer.removeChild(imgContainer);
pagesContainer.insertBefore(imgContainer, sibling);
imgContainer.scrollIntoView({
behavior: "instant",
block: "center",
})
}
}
buttonContainer.appendChild(moveUp);
const moveDown = document.createElement('button');
moveDown.classList.add("move-down-button","btn", "btn-secondary");
moveDown.innerHTML = '<i class="bi bi-arrow-down-short"></i>';
moveDown.onclick = e => {
var imgContainer = e.target;
while (!imgContainer.classList.contains("page-container")) {
imgContainer = imgContainer.parentNode;
}
console.log("imgContainer", imgContainer);
const sibling = imgContainer.nextSibling;
console.log("sibling", sibling);
if (sibling) {
pagesContainer.removeChild(imgContainer);
if (sibling.nextSibling) {
pagesContainer.insertBefore(imgContainer, sibling.nextSibling);
console.log("insert sibling.nextSibling", sibling.nextSibling);
} else {
pagesContainer.appendChild(imgContainer)
console.log("append");
}
imgContainer.scrollIntoView({
behavior: "instant",
block: "center",
})
}
}
buttonContainer.appendChild(moveDown);
const rotateCCW = document.createElement('button');
rotateCCW.classList.add("btn", "btn-secondary");
rotateCCW.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-arrow-counterclockwise" viewBox="0 0 16 16">
<path fill-rule="evenodd" d="M8 3a5 5 0 1 1-4.546 2.914.5.5 0 0 0-.908-.417A6 6 0 1 0 8 2v1z" />
<path d="M8 4.466V.534a.25.25 0 0 0-.41-.192L5.23 2.308a.25.25 0 0 0 0 .384l2.36 1.966A.25.25 0 0 0 8 4.466z" />
</svg>`;
rotateCCW.onclick = e => {
var imgContainer = e.target;
while (!imgContainer.classList.contains("page-container")) {
imgContainer = imgContainer.parentNode;
}
const img = imgContainer.querySelector("img");
rotateElement(img, -90)
}
buttonContainer.appendChild(rotateCCW);
const rotateCW = document.createElement('button');
rotateCW.classList.add("btn", "btn-secondary");
rotateCW.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-arrow-clockwise" viewBox="0 0 16 16">
<path fill-rule="evenodd" d="M8 3a5 5 0 1 0 4.546 2.914.5.5 0 0 1 .908-.417A6 6 0 1 1 8 2v1z" />
<path d="M8 4.466V.534a.25.25 0 0 1 .41-.192l2.36 1.966c.12.1.12.284 0 .384L8.41 4.658A.25.25 0 0 1 8 4.466z" />
</svg>`;
rotateCW.onclick = e => {
var imgContainer = e.target;
while (!imgContainer.classList.contains("page-container")) {
imgContainer = imgContainer.parentNode;
}
const img = imgContainer.querySelector("img");
rotateElement(img, 90)
}
buttonContainer.appendChild(rotateCW);
const deletePage = document.createElement('button');
deletePage.classList.add("btn", "btn-secondary");
deletePage.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-trash" viewBox="0 0 16 16">
<path d="M5.5 5.5A.5.5 0 0 1 6 6v6a.5.5 0 0 1-1 0V6a.5.5 0 0 1 .5-.5Zm2.5 0a.5.5 0 0 1 .5.5v6a.5.5 0 0 1-1 0V6a.5.5 0 0 1 .5-.5Zm3 .5a.5.5 0 0 0-1 0v6a.5.5 0 0 0 1 0V6Z"/>
<path d="M14.5 3a1 1 0 0 1-1 1H13v9a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V4h-.5a1 1 0 0 1-1-1V2a1 1 0 0 1 1-1H6a1 1 0 0 1 1-1h2a1 1 0 0 1 1 1h3.5a1 1 0 0 1 1 1v1ZM4.118 4 4 4.059V13a1 1 0 0 0 1 1h6a1 1 0 0 0 1-1V4.059L11.882 4H4.118ZM2.5 3h11V2h-11v1Z"/>
</svg>`;
deletePage.onclick = e => {
var imgContainer = e.target;
while (!imgContainer.classList.contains("page-container")) {
imgContainer = imgContainer.parentNode;
}
pagesContainer.removeChild(imgContainer);
}
buttonContainer.appendChild(deletePage);
div.appendChild(buttonContainer);
pagesContainer.appendChild(div);
}
}
function rotateElement(element, deg) {
var lastTransform = element.style.rotate;
if (!lastTransform) {
lastTransform = "0";
}
const lastAngle = parseInt(lastTransform.replace(/[^\d-]/g, ''));
const newAngle = lastAngle + deg;
element.style.rotate = newAngle + "deg";
}
function rotateAll(deg) {
for (var i=0; i<pagesContainer.childNodes.length; i++) {
const img = pagesContainer.childNodes[i].querySelector("img");
rotateElement(img, deg)
}
}
async function exportPdf() {
const pdfDoc = await PDFLib.PDFDocument.create();
for (var i=0; i<pagesContainer.childNodes.length; i++) {
const img = pagesContainer.childNodes[i].querySelector("img");
const pages = await pdfDoc.copyPages(img.doc, [img.pageIdx])
const page = pages[0];
const rotation = img.style.rotate;
if (rotation) {
const rotationAngle = parseInt(rotation.replace(/[^\d-]/g, ''));
console.log(img.style.rotate, img.style.rotate.replace(/[^\d-]/g, ''))
page.setRotation(PDFLib.degrees(page.getRotation().angle + rotationAngle))
}
pdfDoc.addPage(page);
}
const pdfBytes = await pdfDoc.save()
const pdfBlob = new Blob([pdfBytes], { type: 'application/pdf' });
const url = URL.createObjectURL(pdfBlob);
const downloadLink = document.createElement('a');
downloadLink.href = url;
downloadLink.download = 'example.pdf';
downloadLink.click(); // Simulate a click on the download link to start the download
}
async function loadFile(file) {
var objectUrl = URL.createObjectURL(file);
var pdfDocument = await toPdfLib(objectUrl);
var renderer = await toRenderer(objectUrl);
myDocument = pdfDocument;
myRenderer = renderer;
console.log(renderer, pdfDocument)
return { renderer, pdfDocument };
}
async function toPdfLib(objectUrl) {
const existingPdfBytes = await fetch(objectUrl).then(res => res.arrayBuffer());
const pdfDoc = await PDFLib.PDFDocument.load(existingPdfBytes);
return pdfDoc;
}
async function toRenderer(objectUrl) {
const pdf = await pdfjsLib.getDocument(objectUrl).promise;
return {
document: pdf,
pageCount: pdf.numPages,
renderPage: async function(pageIdx) {
const page = await this.document.getPage(pageIdx+1);
const canvas = document.createElement("canvas");
// set the canvas size to the size of the page
if (page.rotate == 90 || page.rotate == 270) {
canvas.width = page.view[3];
canvas.height = page.view[2];
} else {
canvas.width = page.view[2];
canvas.height = page.view[3];
}
// render the page onto the canvas
var renderContext = {
canvasContext: canvas.getContext("2d"),
viewport: page.getViewport({ scale: 1 })
};
await page.render(renderContext).promise;
return canvas.toDataURL();
}
};
}
</script>
<style>
#global-buttons-container {
display: flex;
gap: 10px;
align-items: start;
background: rgba(13, 110, 253, 0.1);
border: 1px solid rgba(0, 0, 0, .25);
backdrop-filter: blur(2px);
position: sticky;
top: 10px;
z-index: 10;
padding: 10px;
margin-top: 30px;
border-radius: 8px;
}
#global-buttons-container > * {
padding: 0.6rem 0.75rem;
}
#global-buttons-container svg {
width: 20px;
height: 20px;
}
#export-button {
margin-left: auto;
}
#pages-container {
width: 100%;
display: flex;
gap: 0px;
flex-direction: column;
align-items: center;
margin: 30px 0;
}
.page-container {
width: 500px;
aspect-ratio: 1;
text-align: center;
position: relative;
}
.page-container img {
max-width: calc(100% - 15px);
max-height: calc(100% - 15px);
display: block;
position: absolute;
left: 50%;
top: 50%;
translate: -50% -50%;
box-shadow: 0 0 10px rgba(0,0,0);
transition: rotate .3s;
}
.page-container .button-container {
position: absolute;
top: 50%;
translate: 0 -50%;
right: 6px;
}
.page-container .button-container > * {
padding: 0.25rem 0.5rem;
margin: 3px;
display: block;
}
.page-container svg {
width: 16px;
height: 16px;
}
.page-container:first-child .move-up-button {
visibility: hidden;
}
.page-container:last-child .move-down-button {
visibility: hidden;
}
#add-pdf-button {
margin: 0 auto;
}
</style>
</body>
</html>