🧮 A/L ICT Math & Boolean Note Tool
Type Sinhala or English notes. Use $...$ for inline math, $$...$$ for display math, and logical symbols like $\overline{X}$ for X̅ (X bar).
📊 Live Preview
Your formatted math and Sinhala text will appear here...
`);
printWindow.document.close();
printWindow.print();
}// ✅ MULTI-PAGE FIXED PDF EXPORT - Rewritten for multi-page support
async function downloadPDF() {
try {
const preview = document.getElementById('preview');
// 1. Wait for MathJax to render completely
if (window.MathJax && MathJax.typesetPromise) {
await MathJax.typesetPromise([preview]);
// Give a little extra time for the DOM to settle after MathJax
await new Promise(resolve => setTimeout(resolve, 500));
}const { jsPDF } = window.jspdf;
// Create a clean container for PDF export
const pdfContainer = document.createElement('div');
// Set fixed width for predictable rendering (A4 is 210mm wide)
pdfContainer.style.width = '210mm';
pdfContainer.style.padding = '20mm'; // Simulates 20mm margin (10mm top/bottom/left/right)
pdfContainer.style.background = 'white';
pdfContainer.style.fontFamily = '"Nirmala UI", "Iskoola Pota", Arial, sans-serif';
pdfContainer.style.fontSize = '12pt';
pdfContainer.style.lineHeight = '1.6';
pdfContainer.style.position = 'absolute';
pdfContainer.style.left = '-9999px';
pdfContainer.style.top = '0';
// Get and clean content
let content = tinyMCEEditor.getContent();
content = content
.replace(/\\overline\{X\}/g, 'X̅')
.replace(/\\overline\{A\}/g, 'A̅')
.replace(/\\overline\{B\}/g, 'B̅')
.replace(/\\overline\{([^}]*)\}/g, '($1̅)') // Use parentheses for clarity in complex expressions
.replace(/\\cdot/g, '·')
.replace(/\$\$\\overline\{([^}]*)\}\$\$/g, '$1̅')
.replace(/\$\\overline\{([^}]*)\}\$/g, '$1̅')
.replace(/\$\$(.*?)\$\$/g, '$1') // Remove display math delimiters
.replace(/\$(.*?)\$/g, '$1') // Remove inline math delimiters
.replace(/📗|🧩|🧮|📘|📏|📊|🔄|🧹|➕|📄|🧾|📋|🔌|📚|💾|📂|🖨️/g, '') // Remove emojis
.replace(/
| /g, ' | ') .replace(/ | /g, ' | ');pdfContainer.innerHTML = `Student Math NotesGenerated on ${new Date().toLocaleDateString()} ${content} `;
document.body.appendChild(pdfContainer);// 2. Render the content to a single, long canvas
const canvas = await html2canvas(pdfContainer, {
scale: 2, // Higher scale for better resolution
useCORS: true,
logging: false,
backgroundColor: '#ffffff',
// Explicitly set width/height based on the container
width: pdfContainer.scrollWidth,
height: pdfContainer.scrollHeight
});const imgData = canvas.toDataURL('image/png');
const pdf = new jsPDF('p', 'mm', 'a4');
const pdfWidth = pdf.internal.pageSize.getWidth(); // 210 mm
const pdfHeight = pdf.internal.pageSize.getHeight(); // 297 mm
const margin = 10; // 10mm margin on all sides
const contentWidth = pdfWidth - (2 * margin); // 190 mm
const contentHeight = pdfHeight - (2 * margin); // 277 mm (A4 printable area)
// Calculate scaled image dimensions
const imgWidth = contentWidth;
const imgHeight = (canvas.height * imgWidth) / canvas.width;
let heightLeft = imgHeight; // Total height of the image to be printed
let position = 0; // Vertical position on the canvas image
let pageNum = 1;// 3. Loop through and add pages
while (heightLeft > 0) {
if (pageNum > 1) {
pdf.addPage();
}
// Add a cropped part of the long canvas image
// The image is added at the top margin (margin)
// The y position is negative because we are shifting the image up to show the next part
// 1.05 is a slight scaling factor adjustment to prevent small gaps/cutoffs between pages.
pdf.addImage(imgData, 'PNG', margin, margin - position, imgWidth * 1.05, imgHeight * 1.05);
heightLeft -= contentHeight;
position += contentHeight;
pageNum++;
}
// 4. Clean up
document.body.removeChild(pdfContainer);
// 5. Save PDF
pdf.save('Student_Math_Note.pdf');
} catch (error) {
console.error('PDF generation error:', error);
alert('Error generating PDF. Please ensure your notes are not excessively long or complex, and try again.');
}
}// ✅ FIXED WORD EXPORT - Simplified and reliable
function downloadWord() {
let content = tinyMCEEditor.getContent();
// Convert MathJax to Unicode
content = content
.replace(/\\overline\{X\}/g, 'X̅')
.replace(/\\overline\{A\}/g, 'A̅')
.replace(/\\overline\{B\}/g, 'B̅')
.replace(/\\overline\{([^}]*)\}/g, '$1̅')
.replace(/\\cdot/g, '·')
.replace(/\$\$\\overline\{([^}]*)\}\$\$/g, '$1̅')
.replace(/\$\\overline\{([^}]*)\}\$/g, '$1̅')
.replace(/\$\$(.*?)\$\$/g, '$1')
.replace(/\$(.*?)\$/g, '$1')
.replace(/📗|🧩|🧮|📘|📏|📊|🔄|🧹|➕|📄|🧾|📋|🔌|📚|💾|📂|🖨️/g, '')
.replace(/
|
|---|