| 1 |
/** |
| 2 |
* Easy Invoice Document PDF Generation using html2canvas |
| 3 |
* Generates PDF from the actual rendered invoice/quote HTML |
| 4 |
* |
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* @package Easy_Invoice |
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* @version 1.0.0 |
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*/ |
| 8 |
|
| 9 |
(function() { |
| 10 |
'use strict'; |
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|
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/** ISO 216 A4 (portrait) — explicit mm so PDF page size is always A4 in viewers. */ |
| 13 |
const A4_MM = { width: 210, height: 297 }; |
| 14 |
|
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// Global Document PDF Generator Class |
| 16 |
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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// html2canvas and jsPDF are bundled with the plugin and loaded ahead of |
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// this file by whoever renders the page (PdfHelper::enqueuePdfScripts(), |
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// AdminAssets, or an explicit <script> in the single/preview templates). |
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// |
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// This used to inject both libraries from cdnjs when they were missing. |
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// That is no longer permitted — WordPress.org requires every asset to |
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// ship inside the plugin — so a missing library is now a setup error we |
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// report rather than something we silently fetch over the network. |
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// Same resolution the render path uses below — the UMD build exposes |
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// window.jspdf.jsPDF, older/standalone builds expose window.jsPDF. |
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const hasJsPdf = !!(window.jsPDF || (window.jspdf && window.jspdf.jsPDF)); |
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|
| 35 |
if (typeof html2canvas === 'undefined' || !hasJsPdf) { |
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console.error( |
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'Easy Invoice: PDF generation unavailable — html2canvas and/or jsPDF ' + |
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'were not loaded before document-pdf.js. Enqueue the "html2canvas" and ' + |
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'"jspdf" handles (or include assets/js/vendors/) on this page.' |
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); |
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return; |
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} |
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|
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this.setupPDFButtons(); |
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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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/** |
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* Max canvas edge length (px) — browsers cap canvas size; long invoices exceed this in one shot. |
| 61 |
*/ |
| 62 |
static get MAX_CANVAS_EDGE() { |
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return 10000; |
| 64 |
} |
| 65 |
|
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/** |
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* Vertical slice height (CSS px) per html2canvas capture when content is very tall. |
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*/ |
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static get SLICE_HEIGHT_CSS() { |
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return 3200; |
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} |
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|
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/** |
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* @returns {{width:number,height:number}} A4 size in mm (portrait). |
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*/ |
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static getA4SizeMm() { |
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return { width: A4_MM.width, height: A4_MM.height }; |
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} |
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|
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/** |
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* Append an A4 portrait page (matches initial document format). |
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* |
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* @param {Object} pdf jsPDF instance |
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*/ |
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static addA4Page(pdf) { |
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pdf.addPage('a4', 'p'); |
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this.paintPageWhite(pdf); |
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} |
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|
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/** |
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* Paint the current page white. A PDF page has no background of its |
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* own: where the capture does not cover the sheet — the foot of the |
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* last page, or of a page that broke early at a row — the area is |
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* unpainted, and a renderer is free to show that as black. |
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* |
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* @param {Object} pdf jsPDF instance |
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*/ |
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static paintPageWhite(pdf) { |
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const { width, height } = pdf.internal.pageSize; |
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const w = typeof width === 'function' ? width() : width; |
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const h = typeof height === 'function' ? height() : height; |
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pdf.setFillColor(255, 255, 255); |
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pdf.rect(0, 0, w, h, 'F'); |
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} |
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|
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/** |
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* Padding-top + border-top of the invoice/quote root (CSS px), matching visible HTML inset. |
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* |
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* @param {HTMLElement} el |
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* @returns {number} |
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*/ |
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getContentPaddingTopPx(el) { |
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const s = window.getComputedStyle(el); |
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return (parseFloat(s.paddingTop) || 0) + (parseFloat(s.borderTopWidth) || 0); |
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} |
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|
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/** |
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* Collect bottom Y positions (px from top of root) for table rows and summary blocks |
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* so PDF page breaks avoid cutting through a line item row. |
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* |
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* @param {HTMLElement} root |
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* @returns {number[]} Sorted unique pixel positions (content-relative, 0 .. scrollHeight) |
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*/ |
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collectRowBottomsPx(root) { |
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const rr = root.getBoundingClientRect(); |
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const bottoms = []; |
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|
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const addEl = (el) => { |
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if (!el || !el.getBoundingClientRect) { |
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return; |
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} |
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const r = el.getBoundingClientRect(); |
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const bottom = r.bottom - rr.top + root.scrollTop; |
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if (bottom > 0) { |
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bottoms.push(bottom); |
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} |
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}; |
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|
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root.querySelectorAll('table tbody > tr').forEach(addEl); |
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|
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root.querySelectorAll( |
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'.invoice-summary, .quote-summary, [class*="invoice-summary"], [class*="quote-summary"]' |
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).forEach(addEl); |
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|
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const sorted = [...new Set(bottoms)].sort((a, b) => a - b); |
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return sorted; |
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} |
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|
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/** |
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* Build non-overlapping vertical slices [start,end) in px that stay under maxChunkPx |
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* and end on the nearest row bottom when possible (avoids slicing mid-row in html2canvas). |
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* |
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* @param {number} totalHeightPx |
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* @param {number[]} rowBottomsPx |
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* @param {number} maxChunkPx |
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* @returns {Array<{start:number,end:number}>} |
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*/ |
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buildRowAlignedSlices(totalHeightPx, rowBottomsPx, maxChunkPx) { |
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const slices = []; |
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let start = 0; |
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while (start < totalHeightPx) { |
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let end = Math.min(start + maxChunkPx, totalHeightPx); |
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const backs = rowBottomsPx.filter((b) => b > start && b <= end); |
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if (backs.length) { |
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end = Math.max(...backs); |
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} |
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if (end <= start) { |
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end = Math.min(start + maxChunkPx, totalHeightPx); |
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} |
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slices.push({ start, end }); |
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start = end; |
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} |
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return slices; |
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} |
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|
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/** |
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* Row / block bottoms within a vertical slice, expressed in mm from the top of that slice's image. |
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* |
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* @param {number[]} rowBottomsPx |
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* @param {number} sliceStartPx |
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* @param {number} sliceEndPx |
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* @param {number} sliceHeightPx |
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* @param {number} imgHeightMm |
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* @returns {number[]} |
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*/ |
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breakPointsMmForSlice(rowBottomsPx, sliceStartPx, sliceEndPx, sliceHeightPx, imgHeightMm) { |
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const pts = rowBottomsPx |
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.filter((b) => b > sliceStartPx && b <= sliceEndPx) |
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.map((b) => ((b - sliceStartPx) / sliceHeightPx) * imgHeightMm); |
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if (imgHeightMm > 0) { |
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pts.push(imgHeightMm); |
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} |
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return [...new Set(pts)].sort((a, b) => a - b); |
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} |
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|
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/** |
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* Compute html2canvas scale so width/height stay under browser canvas limits. |
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* |
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* @param {HTMLElement} el |
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* @param {number} baseScale |
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* @returns {number} |
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*/ |
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computeSafeScale(el, baseScale) { |
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const w = Math.max(1, el.scrollWidth); |
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const h = Math.max(1, el.scrollHeight); |
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const maxEdge = this.constructor.MAX_CANVAS_EDGE; |
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const maxScale = Math.min(maxEdge / w, maxEdge / h, baseScale); |
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return Math.max(0.2, Math.min(baseScale, maxScale)); |
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} |
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|
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/** |
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* Capture one vertical slice of an element (for very long content). |
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* |
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* @param {HTMLElement} element |
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* @param {number} offsetY |
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* @param {number} sliceHeight |
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* @param {number} scale |
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* @returns {Promise<HTMLCanvasElement>} |
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*/ |
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captureSlice(element, offsetY, sliceHeight, scale, box) { |
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// Lock the capture viewport to the element's own layout width so |
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// responsive CSS doesn't kick in and shrink columns mid-capture. |
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box = box || { width: Math.max(1, element.scrollWidth), height: element.scrollHeight, card: null }; |
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const lockedWidth = box.card ? window.innerWidth : Math.max(1, element.scrollWidth); |
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return html2canvas(element, { |
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scale, |
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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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imageTimeout: 15000, |
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windowWidth: lockedWidth, |
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width: box.width, |
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onclone: (_doc, clone) => { |
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this.frameClone(clone, box); |
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const node = clone; |
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node.style.overflow = 'hidden'; |
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node.style.boxSizing = 'border-box'; |
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node.style.marginTop = -offsetY + 'px'; |
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node.style.height = sliceHeight + 'px'; |
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} |
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}); |
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} |
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|
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/** |
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* Append canvas to PDF with row-aware vertical crops. |
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* Continuation pages (not at document top) get the same top inset as the HTML root padding — no extra mm margin. |
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* |
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* @param {jsPDF} pdf |
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* @param {HTMLCanvasElement} canvas |
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* @param {number} pageWidthMm |
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* @param {number} pageHeightMm |
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* @param {number[]} breakPointsMm |
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* @param {boolean} prependPage Start this block on a new PDF page (multi-slice continuation). |
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* @param {number} fragmentTopPx Y offset of this bitmap’s top within documentContent (0 = full capture). |
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* @param {number} fragmentHeightPx Layout height (px) this bitmap represents (scrollHeight or slice height). |
| 257 |
* @param {number} padTopCssPx padding-top + border-top of documentContent (CSS px). |
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* @param {number} scale html2canvas scale factor. |
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*/ |
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addImagePagesRowAware( |
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pdf, |
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canvas, |
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pageWidthMm, |
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pageHeightMm, |
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breakPointsMm, |
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prependPage, |
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fragmentTopPx, |
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fragmentHeightPx, |
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padTopCssPx, |
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scale |
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) { |
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let imgHeightMm = (canvas.height * pageWidthMm) / canvas.width; |
| 273 |
// A sheet that is one page tall bar a rounding hair must not spill a |
| 274 |
// blank sliver onto a second page. |
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if (imgHeightMm > pageHeightMm && imgHeightMm - pageHeightMm < 3) { |
| 276 |
imgHeightMm = pageHeightMm; |
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} |
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const fullBreaks = [...new Set([0, ...breakPointsMm.filter((b) => b > 0 && b <= imgHeightMm), imgHeightMm])] |
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.filter((v, i, a) => i === 0 || v > a[i - 1] + 0.0001) |
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.sort((a, b) => a - b); |
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|
| 282 |
if (prependPage) { |
| 283 |
this.constructor.addA4Page(pdf); |
| 284 |
} |
| 285 |
|
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let y0mm = 0; |
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let firstCrop = true; |
| 288 |
|
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while (y0mm < imgHeightMm - 0.0001) { |
| 290 |
const limit = y0mm + pageHeightMm; |
| 291 |
const inRange = fullBreaks.filter((b) => b > y0mm && b <= limit); |
| 292 |
let y1mm; |
| 293 |
if (inRange.length) { |
| 294 |
y1mm = Math.max(...inRange); |
| 295 |
} else { |
| 296 |
const nextB = fullBreaks.find((b) => b > y0mm); |
| 297 |
if (nextB !== undefined && nextB - y0mm <= pageHeightMm) { |
| 298 |
y1mm = nextB; |
| 299 |
} else { |
| 300 |
y1mm = Math.min(limit, imgHeightMm); |
| 301 |
} |
| 302 |
} |
| 303 |
if (y1mm <= y0mm) { |
| 304 |
y1mm = Math.min(y0mm + pageHeightMm, imgHeightMm); |
| 305 |
} |
| 306 |
|
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const py0 = (y0mm / imgHeightMm) * canvas.height; |
| 308 |
const py1 = (y1mm / imgHeightMm) * canvas.height; |
| 309 |
const ch = Math.max(1, Math.round(py1 - py0)); |
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|
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const crop = document.createElement('canvas'); |
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crop.width = canvas.width; |
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crop.height = ch; |
| 314 |
const ctx = crop.getContext('2d'); |
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ctx.drawImage(canvas, 0, py0, canvas.width, ch, 0, 0, canvas.width, ch); |
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|
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/** Document Y (px) at top of this strip; > 0 means below HTML padding — match that inset. */ |
| 318 |
const docYTop = fragmentTopPx + (py0 / canvas.height) * fragmentHeightPx; |
| 319 |
const padTopCanvasPx = |
| 320 |
docYTop > 0.5 && padTopCssPx > 0 ? Math.round(padTopCssPx * scale) : 0; |
| 321 |
|
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let outCanvas = crop; |
| 323 |
if (padTopCanvasPx > 0) { |
| 324 |
const padded = document.createElement('canvas'); |
| 325 |
padded.width = crop.width; |
| 326 |
padded.height = ch + padTopCanvasPx; |
| 327 |
const pctx = padded.getContext('2d'); |
| 328 |
pctx.fillStyle = '#ffffff'; |
| 329 |
pctx.fillRect(0, 0, padded.width, padded.height); |
| 330 |
pctx.drawImage(crop, 0, padTopCanvasPx); |
| 331 |
outCanvas = padded; |
| 332 |
} |
| 333 |
|
| 334 |
// PNG is lossless — invoices are mostly text + tables, where |
| 335 |
// JPEG produces fuzzy edges and colour-fringe around glyphs. |
| 336 |
// The 'SLOW' compression flag tells jsPDF to use the better |
| 337 |
// (slower) inflate algorithm so the embedded bitmap retains |
| 338 |
// its full resolution. |
| 339 |
const cropData = outCanvas.toDataURL('image/png'); |
| 340 |
const segMm = (outCanvas.height * pageWidthMm) / outCanvas.width; |
| 341 |
|
| 342 |
if (!firstCrop) { |
| 343 |
this.constructor.addA4Page(pdf); |
| 344 |
} |
| 345 |
firstCrop = false; |
| 346 |
pdf.addImage(cropData, 'PNG', 0, 0, pageWidthMm, segMm, undefined, 'SLOW'); |
| 347 |
|
| 348 |
y0mm = y1mm; |
| 349 |
} |
| 350 |
} |
| 351 |
|
| 352 |
/** |
| 353 |
* The PDF reproduces the single page: the design's card, with the page |
| 354 |
* background around it as on screen. The live page is never touched; |
| 355 |
* html2canvas renders a clone, and the clone is where the content box |
| 356 |
* is narrowed to the card and given that margin. |
| 357 |
*/ |
| 358 |
static get FRAME_PX() { |
| 359 |
return 24; |
| 360 |
} |
| 361 |
|
| 362 |
/** |
| 363 |
* The design's card inside the content box, if there is one. |
| 364 |
* |
| 365 |
* @param {HTMLElement} content |
| 366 |
* @returns {HTMLElement|null} |
| 367 |
*/ |
| 368 |
findCard(content) { |
| 369 |
return content.querySelector(':scope > .template, :scope > [class*="template-"]') |
| 370 |
|| content.querySelector('.template, [class*="template-"]'); |
| 371 |
} |
| 372 |
|
| 373 |
/** |
| 374 |
* Width/height the capture will have: the card plus the frame. |
| 375 |
* |
| 376 |
* @param {HTMLElement} content |
| 377 |
* @returns {{width:number,height:number,card:HTMLElement|null}} |
| 378 |
*/ |
| 379 |
/** Width of an A4 sheet in CSS pixels (210 mm at 96 dpi). */ |
| 380 |
static get A4_CSS_WIDTH() { |
| 381 |
return 794; |
| 382 |
} |
| 383 |
|
| 384 |
/** |
| 385 |
* Whether the card is the A4 sheet the document page lays out: then it |
| 386 |
* is captured edge to edge and the PDF is A4, one sheet per page. |
| 387 |
* |
| 388 |
* @param {HTMLElement|null} card |
| 389 |
* @returns {boolean} |
| 390 |
*/ |
| 391 |
isA4Sheet(card) { |
| 392 |
if (!card) { return false; } |
| 393 |
return Math.abs(card.getBoundingClientRect().width - this.constructor.A4_CSS_WIDTH) <= 2; |
| 394 |
} |
| 395 |
|
| 396 |
captureBox(content) { |
| 397 |
const card = this.findCard(content); |
| 398 |
if (!card) { |
| 399 |
return { width: content.scrollWidth, height: content.scrollHeight, card: null, pad: 0, a4: false }; |
| 400 |
} |
| 401 |
const a4 = this.isA4Sheet(card); |
| 402 |
const pad = a4 ? 0 : this.constructor.FRAME_PX; |
| 403 |
const r = card.getBoundingClientRect(); |
| 404 |
return { width: Math.round(r.width) + pad * 2, height: Math.round(r.height) + pad * 2, card, pad, a4 }; |
| 405 |
} |
| 406 |
|
| 407 |
/** |
| 408 |
* Apply the frame inside the cloned document: content box as wide as |
| 409 |
* the card plus margin, page background behind it, card centred. |
| 410 |
* |
| 411 |
* @param {HTMLElement} cloneContent |
| 412 |
* @param {{width:number,card:HTMLElement|null}} box |
| 413 |
*/ |
| 414 |
frameClone(cloneContent, box) { |
| 415 |
if (!box.card) { return; } |
| 416 |
const pad = box.pad; |
| 417 |
const bodyBg = getComputedStyle(document.body).backgroundColor; |
| 418 |
cloneContent.style.display = 'block'; |
| 419 |
cloneContent.style.boxSizing = 'border-box'; |
| 420 |
cloneContent.style.width = box.width + 'px'; |
| 421 |
cloneContent.style.maxWidth = box.width + 'px'; |
| 422 |
cloneContent.style.padding = pad + 'px'; |
| 423 |
cloneContent.style.background = pad > 0 && bodyBg && bodyBg !== 'rgba(0, 0, 0, 0)' ? bodyBg : '#ffffff'; |
| 424 |
cloneContent.style.flex = 'none'; |
| 425 |
const cloneCard = cloneContent.querySelector(':scope > .template, :scope > [class*="template-"]') || cloneContent.querySelector('.template, [class*="template-"]'); |
| 426 |
if (cloneCard) { |
| 427 |
cloneCard.style.boxSizing = 'border-box'; |
| 428 |
cloneCard.style.marginLeft = '0'; |
| 429 |
cloneCard.style.marginRight = '0'; |
| 430 |
cloneCard.style.width = Math.round(box.card.getBoundingClientRect().width) + 'px'; |
| 431 |
cloneCard.style.maxWidth = 'none'; |
| 432 |
} |
| 433 |
// Admin-only chrome that is not part of the document. |
| 434 |
cloneContent.querySelectorAll('#additional-css-btn, .ei-css-toggle').forEach((n) => n.remove()); |
| 435 |
} |
| 436 |
|
| 437 |
async generatePDF() { |
| 438 |
try { |
| 439 |
// Show loading state |
| 440 |
this.showLoading(); |
| 441 |
|
| 442 |
// Find the document content |
| 443 |
const documentContent = document.querySelector('.invoice-content') || |
| 444 |
document.querySelector('.quote-content') || |
| 445 |
document.querySelector('.receipt-container'); |
| 446 |
|
| 447 |
if (!documentContent) { |
| 448 |
throw new Error('Document content not found'); |
| 449 |
} |
| 450 |
const box = this.captureBox(documentContent); |
| 451 |
|
| 452 |
// Get document data for filename |
| 453 |
const documentTitle = document.querySelector('.invoice-title')?.textContent || |
| 454 |
document.querySelector('.quote-title')?.textContent || |
| 455 |
document.querySelector('.receipt-title')?.textContent || |
| 456 |
this.documentType; |
| 457 |
const documentNumber = document.querySelector('.invoice-number')?.textContent || |
| 458 |
document.querySelector('.quote-number')?.textContent || |
| 459 |
document.querySelector('.receipt-number')?.textContent || |
| 460 |
(window.easyInvoiceDocument && window.easyInvoiceDocument.number) || |
| 461 |
''; |
| 462 |
const filename = `${documentTitle}-${documentNumber}-${new Date().toISOString().split('T')[0]}.pdf`; |
| 463 |
|
| 464 |
const jsPDF = window.jsPDF || window.jspdf?.jsPDF; |
| 465 |
if (!jsPDF) { |
| 466 |
throw new Error('jsPDF library not available'); |
| 467 |
} |
| 468 |
|
| 469 |
const a4 = this.constructor.getA4SizeMm(); |
| 470 |
// One page, sized to the document, when it is not much taller |
| 471 |
// than an A4 sheet: the PDF is then exactly the page as drawn, |
| 472 |
// with nothing split across a page break. Much longer documents |
| 473 |
// (many line items) fall back to A4 pages broken between rows. |
| 474 |
const contentHeightMm = (box.height * a4.width) / Math.max(1, box.width); |
| 475 |
// An A4 sheet is paged as A4; anything else that is not much |
| 476 |
// taller than a sheet becomes one page sized to fit. |
| 477 |
const singlePage = !box.a4 && contentHeightMm <= a4.height * 2; |
| 478 |
const pdf = new jsPDF({ |
| 479 |
orientation: 'p', |
| 480 |
unit: 'mm', |
| 481 |
format: singlePage ? [a4.width, Math.max(a4.height, contentHeightMm)] : 'a4', |
| 482 |
// FlateDecode-compress the embedded bitmaps so a high-resolution |
| 483 |
// capture doesn't bloat the file to 20MB. |
| 484 |
compress: true, |
| 485 |
precision: 4 |
| 486 |
}); |
| 487 |
this.constructor.paintPageWhite(pdf); |
| 488 |
const pageWidthMm = a4.width; |
| 489 |
// A4 pages keep a strip clear at the foot for the page label. |
| 490 |
const FOOTER_MM = 9; |
| 491 |
// When the capture is the A4 sheet the design lays out, one |
| 492 |
// sheet is one page: reserving the label strip left the last |
| 493 |
// 9mm of every sheet — blank or not — spilling onto a page of |
| 494 |
// its own. The label for a genuinely multi-sheet document is |
| 495 |
// drawn inside the sheet's own bottom margin instead. |
| 496 |
const pageHeightMm = singlePage |
| 497 |
? Math.max(a4.height, contentHeightMm) |
| 498 |
: (box.a4 ? a4.height : a4.height - FOOTER_MM); |
| 499 |
const imgWidthMm = pageWidthMm; |
| 500 |
|
| 501 |
// 2× the CSS pixel grid — matches retina display density, so text |
| 502 |
// edges stay crisp instead of soft. (Previous 1.5× produced the |
| 503 |
// "PDF quality is bad" customer report.) |
| 504 |
const baseScale = 2; |
| 505 |
const totalHeight = box.height; |
| 506 |
const totalWidth = box.width; |
| 507 |
const maxSingleCanvasPx = this.constructor.MAX_CANVAS_EDGE; |
| 508 |
const needsSlices = |
| 509 |
totalHeight * baseScale > maxSingleCanvasPx || |
| 510 |
totalWidth * baseScale > maxSingleCanvasPx; |
| 511 |
|
| 512 |
let rowBottomsPx = this.collectRowBottomsPx(documentContent); |
| 513 |
let padTopCssPx = this.getContentPaddingTopPx(documentContent); |
| 514 |
if (box.card) { |
| 515 |
// Rows were measured on the live page; in the framed clone the |
| 516 |
// card starts FRAME_PX below the top of the capture. |
| 517 |
const shift = box.pad - (box.card.getBoundingClientRect().top - documentContent.getBoundingClientRect().top); |
| 518 |
rowBottomsPx = rowBottomsPx.map((b) => b + shift); |
| 519 |
padTopCssPx = box.pad; |
| 520 |
} |
| 521 |
|
| 522 |
if (!needsSlices) { |
| 523 |
const scale = this.computeSafeScale(documentContent, baseScale); |
| 524 |
// Lock the capture viewport to the element's own layout width |
| 525 |
// so responsive media queries don't shrink the design mid-capture. |
| 526 |
// The clone must lay out exactly as the live page does — the |
| 527 |
// crop origin html2canvas uses is the live element's position — |
| 528 |
// so the viewport stays the real one when the card is framed. |
| 529 |
const lockedWidth = box.card ? window.innerWidth : Math.max(1, documentContent.scrollWidth); |
| 530 |
const canvas = await html2canvas(documentContent, { |
| 531 |
scale, |
| 532 |
useCORS: true, |
| 533 |
allowTaint: true, |
| 534 |
backgroundColor: '#ffffff', |
| 535 |
logging: false, |
| 536 |
imageTimeout: 15000, |
| 537 |
windowWidth: lockedWidth, |
| 538 |
windowHeight: window.innerHeight, |
| 539 |
width: box.width, |
| 540 |
height: box.height, |
| 541 |
onclone: (_doc, clone) => this.frameClone(clone, box) |
| 542 |
}); |
| 543 |
const imgHeightMm = (canvas.height * imgWidthMm) / canvas.width; |
| 544 |
const breakMm = this.breakPointsMmForSlice( |
| 545 |
rowBottomsPx, |
| 546 |
0, |
| 547 |
totalHeight, |
| 548 |
totalHeight, |
| 549 |
imgHeightMm |
| 550 |
); |
| 551 |
this.addImagePagesRowAware( |
| 552 |
pdf, |
| 553 |
canvas, |
| 554 |
imgWidthMm, |
| 555 |
pageHeightMm, |
| 556 |
breakMm, |
| 557 |
false, |
| 558 |
0, |
| 559 |
totalHeight, |
| 560 |
padTopCssPx, |
| 561 |
scale |
| 562 |
); |
| 563 |
} else { |
| 564 |
const sliceCss = this.constructor.SLICE_HEIGHT_CSS; |
| 565 |
let scale = this.computeSafeScale(documentContent, baseScale); |
| 566 |
scale = Math.min(scale, maxSingleCanvasPx / sliceCss); |
| 567 |
scale = Math.max(0.2, scale); |
| 568 |
|
| 569 |
const slices = this.buildRowAlignedSlices(totalHeight, rowBottomsPx, sliceCss); |
| 570 |
|
| 571 |
for (let i = 0; i < slices.length; i++) { |
| 572 |
const { start, end } = slices[i]; |
| 573 |
const sliceH = end - start; |
| 574 |
const canvas = await this.captureSlice(documentContent, start, sliceH, scale, box); |
| 575 |
const imgHeightMm = (canvas.height * imgWidthMm) / canvas.width; |
| 576 |
const breakMm = this.breakPointsMmForSlice( |
| 577 |
rowBottomsPx, |
| 578 |
start, |
| 579 |
end, |
| 580 |
sliceH, |
| 581 |
imgHeightMm |
| 582 |
); |
| 583 |
this.addImagePagesRowAware( |
| 584 |
pdf, |
| 585 |
canvas, |
| 586 |
imgWidthMm, |
| 587 |
pageHeightMm, |
| 588 |
breakMm, |
| 589 |
i > 0, |
| 590 |
start, |
| 591 |
sliceH, |
| 592 |
padTopCssPx, |
| 593 |
scale |
| 594 |
); |
| 595 |
} |
| 596 |
} |
| 597 |
|
| 598 |
// "INV-000123 · Page 2 of 3" on every page of a multi-page file, |
| 599 |
// in the strip kept clear below the content. |
| 600 |
const pageCount = pdf.getNumberOfPages(); |
| 601 |
if (pageCount > 1) { |
| 602 |
const label = (documentNumber || documentTitle || '').trim(); |
| 603 |
for (let n = 1; n <= pageCount; n++) { |
| 604 |
pdf.setPage(n); |
| 605 |
pdf.setFontSize(8); |
| 606 |
pdf.setTextColor(120, 120, 120); |
| 607 |
pdf.text(`${label ? label + ' · ' : ''}${n} / ${pageCount}`, a4.width - 12, a4.height - 4.5, { align: 'right' }); |
| 608 |
} |
| 609 |
} |
| 610 |
|
| 611 |
// Download the PDF |
| 612 |
pdf.save(filename); |
| 613 |
|
| 614 |
// Hide loading state |
| 615 |
this.hideLoading(); |
| 616 |
|
| 617 |
} catch (error) { |
| 618 |
console.error('PDF generation failed:', error); |
| 619 |
this.hideLoading(); |
| 620 |
|
| 621 |
// Show error message |
| 622 |
if (typeof EasyInvoiceToast !== 'undefined') { |
| 623 |
EasyInvoiceToast.show('error', 'Failed to generate PDF. Please try again.'); |
| 624 |
} else if (typeof showMessage !== 'undefined') { |
| 625 |
showMessage('Failed to generate PDF. Please try again.', 'error'); |
| 626 |
} else { |
| 627 |
alert('Failed to generate PDF. Please try again.'); |
| 628 |
} |
| 629 |
} |
| 630 |
} |
| 631 |
|
| 632 |
showLoading() { |
| 633 |
// Create loading overlay |
| 634 |
const overlay = document.createElement('div'); |
| 635 |
overlay.id = 'pdf-loading-overlay'; |
| 636 |
overlay.style.cssText = ` |
| 637 |
position: fixed; |
| 638 |
top: 0; |
| 639 |
left: 0; |
| 640 |
width: 100%; |
| 641 |
height: 100%; |
| 642 |
background: rgba(0, 0, 0, 0.5); |
| 643 |
display: flex; |
| 644 |
justify-content: center; |
| 645 |
align-items: center; |
| 646 |
z-index: 9999; |
| 647 |
`; |
| 648 |
|
| 649 |
const spinner = document.createElement('div'); |
| 650 |
spinner.style.cssText = ` |
| 651 |
background: white; |
| 652 |
padding: 20px; |
| 653 |
border-radius: 8px; |
| 654 |
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15); |
| 655 |
text-align: center; |
| 656 |
`; |
| 657 |
|
| 658 |
spinner.innerHTML = ` |
| 659 |
<div style="margin-bottom: 10px;"> |
| 660 |
<svg width="40" height="40" viewBox="0 0 40 40"> |
| 661 |
<circle cx="20" cy="20" r="18" stroke="#e3e3e3" stroke-width="4" fill="none"/> |
| 662 |
<circle cx="20" cy="20" r="18" stroke="#007cba" stroke-width="4" fill="none" |
| 663 |
stroke-dasharray="113" stroke-dashoffset="113" |
| 664 |
style="animation: spin 1s linear infinite; transform-origin: 50% 50%;"> |
| 665 |
<animate attributeName="stroke-dashoffset" values="113;0" dur="1s" repeatCount="indefinite"/> |
| 666 |
</circle> |
| 667 |
</svg> |
| 668 |
</div> |
| 669 |
<div style="color: #333; font-weight: 500;">Generating PDF...</div> |
| 670 |
`; |
| 671 |
|
| 672 |
overlay.appendChild(spinner); |
| 673 |
document.body.appendChild(overlay); |
| 674 |
|
| 675 |
// Add CSS animation |
| 676 |
const style = document.createElement('style'); |
| 677 |
style.textContent = ` |
| 678 |
@keyframes spin { |
| 679 |
0% { stroke-dashoffset: 113; } |
| 680 |
100% { stroke-dashoffset: 0; } |
| 681 |
} |
| 682 |
`; |
| 683 |
document.head.appendChild(style); |
| 684 |
} |
| 685 |
|
| 686 |
hideLoading() { |
| 687 |
const overlay = document.getElementById('pdf-loading-overlay'); |
| 688 |
if (overlay) { |
| 689 |
overlay.remove(); |
| 690 |
} |
| 691 |
} |
| 692 |
}; |
| 693 |
|
| 694 |
// Backward compatibility - keep InvoicePdfGenerator for existing code |
| 695 |
window.InvoicePdfGenerator = window.DocumentPdfGenerator; |
| 696 |
|
| 697 |
// Initialize when DOM is ready |
| 698 |
if (document.readyState === 'loading') { |
| 699 |
document.addEventListener('DOMContentLoaded', () => { |
| 700 |
// Auto-detect document type based on page content |
| 701 |
const isQuote = document.querySelector('.quote-content, .quote-title, .quote-number'); |
| 702 |
const documentType = isQuote ? 'quote' : 'invoice'; |
| 703 |
new DocumentPdfGenerator(documentType); |
| 704 |
}); |
| 705 |
} else { |
| 706 |
// Auto-detect document type based on page content |
| 707 |
const isQuote = document.querySelector('.quote-content, .quote-title, .quote-number'); |
| 708 |
const documentType = isQuote ? 'quote' : 'invoice'; |
| 709 |
new DocumentPdfGenerator(documentType); |
| 710 |
} |
| 711 |
|
| 712 |
})(); |
| 713 |
|
