https://ppoagroup.com/js/pdfEditor.js

1window.pdfEditor = {
2    _doc: null,
3    _pageCount: 0,
4    _lib: null,
5
6    _ensurePdfJs: async function () {
7        if (this._lib) return true;
8        try {
9            var lib = await import('/lib/pdfjs/pdf.min.mjs');
10            lib.GlobalWorkerOptions.workerSrc = '/lib/pdfjs/pdf.worker.min.mjs';
11            this._lib = lib;
12            console.log('PDF.js loaded successfully');
13            return true;
14        } catch (e) {
15            console.error('Failed to load PDF.js:', e);
16            return false;
17        }
18    },
19
20    loadDocument: async function (url) {
21        var ready = await this._ensurePdfJs();
22        if (!ready) return false;
23
24        try {
25            var response = await fetch(url);
26            if (!response.ok) {
27                console.error('PDF fetch failed:', response.status);
28                return false;
29            }
30            var data = await response.arrayBuffer();
31            this._doc = await this._lib.getDocument({ data: data }).promise;
32            this._pageCount = this._doc.numPages;
33            return true;
34        } catch (e) {
35            console.error('Failed to load PDF document:', e);
36            return false;
37        }
38    },
39
40    loadDocumentFromBytes: async function (byteArray) {
41        var ready = await this._ensurePdfJs();
42        if (!ready) return false;
43
44        try {
45            var data = byteArray instanceof Uint8Array ? byteArray : new Uint8Array(byteArray);
46            this._doc = await this._lib.getDocument({ data: data }).promise;
47            this._pageCount = this._doc.numPages;
48            console.log('PDF loaded from bytes, pages:', this._pageCount);
49            return true;
50        } catch (e) {
51            console.error('Failed to load PDF from bytes:', e);
52            return false;
53        }
54    },
55
56    getPageCount: function () {
57        return this._pageCount;
58    },
59
60    renderPage: async function (pageNum, canvasId, scale) {
61        if (!this._doc) return { width: 0, height: 0 };
62        try {
63            var page = await this._doc.getPage(pageNum);
64            var viewport = page.getViewport({ scale: scale || 1.0 });
65            var canvas = document.getElementById(canvasId);
66            if (!canvas) return { width: 0, height: 0 };
67
68            canvas.width = viewport.width;
69            canvas.height = viewport.height;
70            var ctx = canvas.getContext('2d');
71
72            await page.render({ canvasContext: ctx, viewport: viewport }).promise;
73            return { width: viewport.width, height: viewport.height };
74        } catch (e) {
75            console.error('Failed to render page:', e);
76            return { width: 0, height: 0 };
77        }
78    },
79
80    getPageDimensions: async function (pageNum) {
81        if (!this._doc) return { width: 0, height: 0 };
82        try {
83            var page = await this._doc.getPage(pageNum);
84            var viewport = page.getViewport({ scale: 1.0 });
85            return { width: viewport.width, height: viewport.height };
86        } catch (e) {
87            return { width: 0, height: 0 };
88        }
89    },
90
91    getContainerWidth: function (containerId) {
92        var el = document.querySelector('.pdf-editor-canvas-area');
93        if (!el) return 600;
94        return el.clientWidth - 48; // subtract padding
95    },
96
97    getClickPercent: function (canvasId, clientX, clientY) {
98        var canvas = document.getElementById(canvasId);
99        if (!canvas) return null;
100        var rect = canvas.getBoundingClientRect();
101        var x = ((clientX - rect.left) / rect.width) * 100;
102        var y = ((clientY - rect.top) / rect.height) * 100;
103        return { x: Math.max(0, Math.min(100, x)), y: Math.max(0, Math.min(100, y)) };
104    },
105
106    destroy: function () {
107        if (this._doc) {
108            this._doc.destroy();
109            this._doc = null;
110        }
111        this._pageCount = 0;
112    }
113};