Download view only protected presentation from Google Drive

DownloadGGDrivePresentation.md

Step by step guide to downloading protected presentation from Google Drive.

Example URL: https://docs.google.com/presentation/d/.../edit

1. Open the document in Google Docs.
2. Update the access url, replace the display mode at the end of the url from /edit to /htmlpresent:
   • https://docs.google.com/presentation/d/.../htmlpresent
3. Scroll down to the bottom of the document to make sure all pages have loaded.
4. Open Developer Tools - Console:
   • If you are previewing in Google Chrome or Firefox: Press Shift + Ctrl + J ( on Windows / Linux) or Option + ⌘ + J (on Mac).
   • If you are previewing in Microsoft Edge Press Shift + Ctrl + I.
   • If you are previewing in Apple Safari Press Option + ⌘ + C.
5. Paste below code and press Enter. The pdf file will now start downloading. This may take a few minutes depending on the number of pages in the document.

let trustedURL_jspdf;
let trustedURL_domtoimage;

if (window.trustedTypes && trustedTypes.createPolicy) {
    const policy = trustedTypes.createPolicy('myPolicy', {
        createScriptURL: (input) => input
    });

    trustedURL_jspdf = policy.createScriptURL('https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.4.0/jspdf.umd.min.js');
    trustedURL_domtoimage = policy.createScriptURL('https://cdnjs.cloudflare.com/ajax/libs/dom-to-image/2.6.0/dom-to-image.min.js');
} else {
    trustedURL_jspdf = 'https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.4.0/jspdf.umd.min.js';
    trustedURL_domtoimage = 'https://cdnjs.cloudflare.com/ajax/libs/dom-to-image/2.6.0/dom-to-image.min.js';
}

const script1 = document.createElement('script');
script1.src = trustedURL_jspdf;
document.head.appendChild(script1);

const script2 = document.createElement('script');
script2.src = trustedURL_domtoimage;
document.head.appendChild(script2);

script1.onload = script2.onload = function() {
    if (window.jspdf && window.domtoimage) {
        console.log('Both libraries loaded successfully');
        createPDFWithImages();
    } else {
        console.error('Failed to load the libraries');
    }
};

async function translateText(text, sourceLang = 'auto', targetLang = 'fr') { //translate to french
    const url = `https://translate.googleapis.com/translate_a/single?client=gtx&sl=${sourceLang}&tl=${targetLang}&dt=t&q=${encodeURIComponent(text)}`;

    try {
        const response = await fetch(url);
        const data = await response.json();

        const translatedText = data[0].map(item => item[0]).join(' ');

        return translatedText;
    } catch (error) {
        console.error('Translate error:', error);
        return null;
    }
}

function getSlideNotesText(slideNotes) {
    if (!slideNotes) {
        console.log('Not found: class "slide-notes"');
        return '';
    }

    const paragraphs = slideNotes.querySelectorAll('p');
    const textContent = Array.from(paragraphs)
        .map(p => p.textContent.trim())
        .join(' \n ');

    return textContent;
}

const createPDFWithImages = async () => {
    const {
        jsPDF
    } = window.jspdf;

    const doc = new jsPDF({
        orientation: 'l',
        unit: 'mm',
        format: 'a4',
        compressPDF: true
    });
    const slides = document.querySelectorAll('div.slide');

    const pageWidth = doc.internal.pageSize.getWidth();
    const pageHeight = doc.internal.pageSize.getHeight();
    const margin = 0;

    for (let i = 0; i < slides.length; i++) {
        const slide = slides[i];

        const content = slide.querySelector('.slide-content');
        const notes = slide.querySelector('.slide-notes');
        content.style.margin = '0';

        await window.domtoimage.toPng(content)
            .then((imgDataUrl) => {
                if (i > 0) {
                    doc.addPage();
                }

                const imgWidth = pageWidth - 2 * margin;
                const imgHeight = imgWidth * (content.clientHeight / content.clientWidth);
                const x = margin;
                const y = (pageHeight - imgHeight) / 2;

                doc.addImage(imgDataUrl, 'PNG', x, y, imgWidth, imgHeight, '', 'FAST');
            })
            .catch((error) => {
                console.error('Failed to convert slide to image:', error);
            });

        if (notes != undefined) {
            notes.style.margin = '0';
            const txtNotes = " " + getSlideNotesText(notes);
            const translatedResult = await translateText(txtNotes);
            const combinedNote = txtNotes + "\n\nTranslated text: \n\n " + translatedResult;

            doc.addPage();

            doc.text(combinedNote, 10, 10, {
                maxWidth: pageWidth - 20
            });
        }
    }

    doc.save('slides.pdf');
};

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