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/** |
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* Easy Invoice Document PDF Generation using html2canvas |
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* Generates PDF from the actual rendered invoice/quote HTML |
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* |
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* @package Easy_Invoice |
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* @version 1.0.0 |
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*/ |
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|
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(function() { |
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'use strict'; |
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|
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// Global Document PDF Generator Class |
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window.DocumentPdfGenerator = class DocumentPdfGenerator { |
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constructor(documentType = 'invoice') { |
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this.documentType = documentType; // 'invoice' or 'quote' |
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this.init(); |
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} |
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|
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init() { |
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// Add html2canvas script if not already loaded |
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if (typeof html2canvas === 'undefined') { |
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this.loadScript('https://cdnjs.cloudflare.com/ajax/libs/html2canvas/1.4.1/html2canvas.min.js', () => { |
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this.loadScript('https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js', () => { |
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this.setupPDFButtons(); |
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}); |
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}); |
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} else { |
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this.setupPDFButtons(); |
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} |
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} |
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|
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loadScript(src, callback) { |
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const script = document.createElement('script'); |
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script.src = src; |
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script.onload = callback; |
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document.head.appendChild(script); |
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} |
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|
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setupPDFButtons() { |
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// Find all PDF download buttons |
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const pdfButtons = document.querySelectorAll('.download-pdf-btn, .ei-download-pdf'); |
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|
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pdfButtons.forEach(button => { |
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button.addEventListener('click', (e) => { |
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e.preventDefault(); |
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this.generatePDF(); |
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}); |
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}); |
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} |
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|
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async generatePDF() { |
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try { |
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// Show loading state |
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this.showLoading(); |
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|
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// Find the document content |
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const documentContent = document.querySelector('.invoice-content') || |
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document.querySelector('.quote-content'); |
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|
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if (!documentContent) { |
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throw new Error('Document content not found'); |
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} |
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|
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// Get document data for filename |
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const documentTitle = document.querySelector('.invoice-title')?.textContent || |
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document.querySelector('.quote-title')?.textContent || |
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this.documentType; |
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const documentNumber = document.querySelector('.invoice-number')?.textContent || |
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document.querySelector('.quote-number')?.textContent || |
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''; |
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const filename = `${documentTitle}-${documentNumber}-${new Date().toISOString().split('T')[0]}.pdf`; |
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|
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// Simple html2canvas configuration |
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const canvas = await html2canvas(documentContent, { |
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scale: 1.5, |
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useCORS: true, |
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allowTaint: true, |
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backgroundColor: '#ffffff', |
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logging: false |
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}); |
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|
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// Convert canvas to image |
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const imgData = canvas.toDataURL('image/jpeg'); |
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|
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// Create PDF |
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const jsPDF = window.jsPDF || window.jspdf?.jsPDF; |
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if (!jsPDF) { |
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throw new Error('jsPDF library not available'); |
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} |
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|
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const pdf = new jsPDF('p', 'mm', 'a4'); |
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|
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// Calculate dimensions |
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const imgWidth = 210; // A4 width in mm |
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const pageHeight = 295; // A4 height in mm |
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const imgHeight = (canvas.height * imgWidth) / canvas.width; |
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|
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let heightLeft = imgHeight; |
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let position = 0; |
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|
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// Add first page |
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pdf.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight); |
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heightLeft -= pageHeight; |
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|
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// Add additional pages if content is longer than one page |
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while (heightLeft >= 0) { |
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position = heightLeft - imgHeight; |
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pdf.addPage(); |
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pdf.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight); |
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heightLeft -= pageHeight; |
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} |
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|
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// Download the PDF |
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pdf.save(filename); |
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|
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// Hide loading state |
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this.hideLoading(); |
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|
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} catch (error) { |
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console.error('PDF generation failed:', error); |
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this.hideLoading(); |
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|
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// Show error message |
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if (typeof EasyInvoiceToast !== 'undefined') { |
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EasyInvoiceToast.show('error', 'Failed to generate PDF. Please try again.'); |
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} else if (typeof showMessage !== 'undefined') { |
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showMessage('Failed to generate PDF. Please try again.', 'error'); |
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} else { |
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alert('Failed to generate PDF. Please try again.'); |
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} |
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} |
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} |
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|
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showLoading() { |
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// Create loading overlay |
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const overlay = document.createElement('div'); |
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overlay.id = 'pdf-loading-overlay'; |
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overlay.style.cssText = ` |
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position: fixed; |
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top: 0; |
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left: 0; |
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width: 100%; |
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height: 100%; |
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background: rgba(0, 0, 0, 0.5); |
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display: flex; |
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justify-content: center; |
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align-items: center; |
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z-index: 9999; |
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`; |
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|
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const spinner = document.createElement('div'); |
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spinner.style.cssText = ` |
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background: white; |
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padding: 20px; |
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border-radius: 8px; |
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box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15); |
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text-align: center; |
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`; |
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|
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spinner.innerHTML = ` |
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<div style="margin-bottom: 10px;"> |
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<svg width="40" height="40" viewBox="0 0 40 40"> |
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<circle cx="20" cy="20" r="18" stroke="#e3e3e3" stroke-width="4" fill="none"/> |
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<circle cx="20" cy="20" r="18" stroke="#007cba" stroke-width="4" fill="none" |
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stroke-dasharray="113" stroke-dashoffset="113" |
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style="animation: spin 1s linear infinite; transform-origin: 50% 50%;"> |
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<animate attributeName="stroke-dashoffset" values="113;0" dur="1s" repeatCount="indefinite"/> |
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</circle> |
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</svg> |
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</div> |
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<div style="color: #333; font-weight: 500;">Generating PDF...</div> |
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`; |
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|
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overlay.appendChild(spinner); |
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document.body.appendChild(overlay); |
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|
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// Add CSS animation |
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const style = document.createElement('style'); |
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style.textContent = ` |
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@keyframes spin { |
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0% { stroke-dashoffset: 113; } |
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100% { stroke-dashoffset: 0; } |
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} |
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`; |
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document.head.appendChild(style); |
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} |
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|
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hideLoading() { |
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const overlay = document.getElementById('pdf-loading-overlay'); |
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if (overlay) { |
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overlay.remove(); |
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} |
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} |
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}; |
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|
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// Backward compatibility - keep InvoicePdfGenerator for existing code |
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window.InvoicePdfGenerator = window.DocumentPdfGenerator; |
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|
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// Initialize when DOM is ready |
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if (document.readyState === 'loading') { |
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document.addEventListener('DOMContentLoaded', () => { |
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// Auto-detect document type based on page content |
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const isQuote = document.querySelector('.quote-content, .quote-title, .quote-number'); |
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const documentType = isQuote ? 'quote' : 'invoice'; |
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new DocumentPdfGenerator(documentType); |
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}); |
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} else { |
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// Auto-detect document type based on page content |
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const isQuote = document.querySelector('.quote-content, .quote-title, .quote-number'); |
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const documentType = isQuote ? 'quote' : 'invoice'; |
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new DocumentPdfGenerator(documentType); |
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} |
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|
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})(); |
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|
