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"; return null; } // If instance for this specific chartId exists, destroy it. let existingChart = Chart.getChart(chartId); if (existingChart) { existingChart.destroy(); } if (data.labels.length === 0 || data.datasets[0].data.reduce((a,b) => a+b, 0) === 0) { canvasElement.style.display = 'none'; // Hide canvas if no data const noDataMsgId = chartId + '-noDataMsg'; let noDataEl = document.getElementById(noDataMsgId); if (!noDataEl) { noDataEl = document.createElement('p'); noDataEl.id = noDataMsgId; noDataEl.style.textAlign = 'center'; noDataEl.textContent = `No data to display for ${titleText}.`; canvasElement.parentElement.appendChild(noDataEl); } noDataEl.style.display = 'block'; return null; } else { canvasElement.style.display = 'block'; const noDataMsgId = chartId + '-noDataMsg'; let noDataEl = document.getElementById(noDataMsgId); if (noDataEl) noDataEl.style.display = 'none'; } return new Chart(canvasElement.getContext('2d'), { type: type, data: data, options: { responsive: true, maintainAspectRatio: false, plugins: { legend: { position: 'bottom', labels: { font: { size: 11 }, boxWidth: 20 } }, title: { display: true, text: titleText, font: { size: 15 } }, tooltip: { callbacks: { label: function(context) { let label = context.label || ''; if (label) label += ': '; if (context.parsed !== null) { const sum = context.dataset.data.reduce((a, b) => a + b, 0); const percentage = sum > 0 ? (context.parsed / sum) * 100 : 0; label += `${context.parsed.toFixed(2)} (${percentage.toFixed(1)}%)`; } return label; } } } } } }); } async function generateAndDownloadPDF() { if (typeof window.html2canvas === 'undefined' || typeof window.jspdf === 'undefined' || typeof window.jspdf.jsPDF === 'undefined') { alert("PDF generation libraries are not loaded. Please check your internet connection or contact support."); return; } const { jsPDF: JsPDFConstructor } = window.jspdf; const pdf = new JsPDFConstructor('p', 'pt', 'a4'); const pdfContentElement = toolContainer.querySelector('#emaa-analysisReportContent'); // Temporarily show PDF headers if(pdfHeaderEl) pdfHeaderEl.style.display = 'block'; if(pdfDateEl) { pdfDateEl.textContent = `Report Generated: ${new Date().toLocaleString()}`; pdfDateEl.style.display = 'block'; } // Add class for PDF view to hide buttons via CSS toolContainer.classList.add('emaa-pdf-view'); try { const canvas = await html2canvas(pdfContentElement, { scale: 2, // Improves quality useCORS: true, logging: false, windowWidth: pdfContentElement.scrollWidth, windowHeight: pdfContentElement.scrollHeight }); const imgData = canvas.toDataURL('image/png'); const imgProps = pdf.getImageProperties(imgData); const pdfWidth = pdf.internal.pageSize.getWidth(); const margin = 40; // pt const contentWidth = pdfWidth - (margin * 2); const contentHeight = (imgProps.height * contentWidth) / imgProps.width; let currentPosition = 0; const pageHeight = pdf.internal.pageSize.getHeight() - (margin * 2); let remainingHeight = contentHeight; pdf.addImage(imgData, 'PNG', margin, margin + currentPosition, contentWidth, contentHeight); remainingHeight -= pageHeight; while (remainingHeight > 0) { currentPosition -= pageHeight; // This is the new Y offset for the image on the new page pdf.addPage(); pdf.addImage(imgData, 'PNG', margin, currentPosition + margin, contentWidth, contentHeight); remainingHeight -= pageHeight; } pdf.save('Emerging_Markets_Allocation_Analysis.pdf'); } catch (error) { console.error("Error generating PDF:", error); alert("An error occurred while generating the PDF. Check the console for details."); } finally { // Revert visibility changes if(pdfHeaderEl) pdfHeaderEl.style.display = 'none'; if(pdfDateEl) pdfDateEl.style.display = 'none'; toolContainer.classList.remove('emaa-pdf-view'); } } init(); });