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booklet: function to merge 2 page in one

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This commit is contained in:
Vincent LAURENT 2025-07-16 01:45:46 +02:00
commit 95328dafcd
1 changed files with 48 additions and 4 deletions
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52
public/js/organization.js
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@ -597,7 +597,7 @@ async function saveAll() {
async function save(order) {
const PDFDocument = window['PDFLib'].PDFDocument
const Rotation = window['PDFLib'].Rotation
const printFormating = "Normal";
const pdf = await PDFDocument.load(await document.querySelector('#input_pdf').files.item(0).arrayBuffer(), { ignoreEncryption: true, password: "", updateMetadata: false });
let filename = "";
@ -649,15 +649,25 @@ async function save(order) {
if(pdfPage.getHeight() > pdfPage.getWidth()) {
resizePage(pdfPage, Math.min(height, width), Math.max(height, width));
} else {
resizePage(pdfPage, Math.max(height, width), Math.min(height, width));
resizePage(pdfPage, Math.max(height, width), Math.min(height, width));
}
}
pdf.addPage(pdfPage);
}
cleanPDF(pdf);
if(printFormating == "Booklet") {
const pdfBooklet = await window['PDFLib'].PDFDocument.create();
for(let i = 0; i < pdf.getPages().length; i = i + 2) {
await merge2Pages(pdfBooklet, pdf.getPages()[i], pdf.getPages()[i+1])
}
let newPDF = new Blob([await pdfBooklet.save()], {type: "application/pdf"});
const newPDF = new Blob([await pdf.save()], {type: "application/pdf"});
await download(newPDF, filename+".pdf");
return;
}
cleanPDF(pdf);
let newPDF = new Blob([await pdf.save()], {type: "application/pdf"});
await download(newPDF, filename+".pdf");
}
@ -671,6 +681,40 @@ function points2mm(points) {
return Math.round(points * 25.4 / 72);
}
async function merge2Pages(pdf, pageA, pageB) {
const newPageWidth = Math.max(pageA.getWidth(), pageA.getHeight());
const newPageHeight = Math.min(pageA.getWidth(), pageA.getHeight());
const page = pdf.addPage([newPageWidth, newPageHeight]);
const pageEmbeddedA = await pdf.embedPage(pageA, {
left: 0,
bottom: 0,
right: pageA.getWidth(),
top: pageA.getHeight(),
});
const pageEmbeddedDimsA = pageEmbeddedA.scale((newPageWidth / 2) / pageA.getWidth());
page.drawPage(pageEmbeddedA, {
...pageEmbeddedDimsA,
x: 0,
y: 0,
});
const pageEmbeddedB = await pdf.embedPage(pageB, {
left: 0,
bottom: 0,
right: pageB.getWidth(),
top: pageB.getHeight(),
});
const pageEmbeddedDimsB = pageEmbeddedB.scale((newPageWidth / 2) / pageB.getWidth());
page.drawPage(pageEmbeddedB, {
...pageEmbeddedDimsB,
x: newPageWidth / 2,
y: 0,
});
}
function resizePage(page, newWidth, newHeight) {
const oldWidth = page.getSize().width;
const oldHeight = page.getSize().height;