/
index.ts
109 lines (102 loc) · 4.3 KB
/
index.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
/**
* @module pdf
* @type {Object}
* @author Ozcan Ovunc <ozcan.ovunc@smartface.io>
* @copyright Smartface 2019
*/
import WebView from '@smartface/native/ui/webview';
import Screen from '@smartface/native/device/screen';
const htmlTemplate = `
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=$maximumScale, user-scalable=$userScalable">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/pdfjs-dist@1.10.100/build/pdf.js"></script>
</head>
<body>
<script>
PDFJS.getDocument({ data: atob("$BASE64PDF") })
.then(pdfDocument => {
let pagePromises = [];
for (let i = 1; i <= pdfDocument.numPages; ++i) {
pagePromises.push(pdfDocument.getPage(i));
}
return Promise.all(pagePromises);
})
.then(pages => {
return Promise.all(
pages.map((page, index) => {
let canvas = document.createElement('canvas');
canvas.setAttribute("width", page.getViewport(1).width * 2);
canvas.setAttribute("style", "visibility: hidden;");
let scaleRequired = canvas.width / page.getViewport(1).width;
let viewport = page.getViewport(scaleRequired);
canvas.height = viewport.height;
let renderContext = {
canvasContext: canvas.getContext('2d'),
viewport
};
// Render the page contents in the canvas
return page.render(renderContext).then(() => canvas.toDataURL());
}));
})
.then(images => {
images.forEach(image => {
let img = document.createElement("IMG");
img.setAttribute("src", image);
img.setAttribute("width", __CUSTOM_WIDTH__);
document.body.appendChild(img);
});
});
</script>
</body>
</html>
`;
/**
* @function
* Renders base64 string as pdf file in a WebView
* @example
* ```
* import pdf from '@smartface/extension-utils/lib/pdf';
* pdf.render({
* webView: webView,
* base64pdf: 'JVBERi0xLjcKCjEgMCBvYmogICUgZW50cnkgcG9pbnQKPDwKICAvVHlwZSAvQ2F0YWxvZwog' +
* 'IC9QYWdlcyAyIDAgUgo+PgplbmRvYmoKCjIgMCBvYmoKPDwKICAvVHlwZSAvUGFnZXMKICAv' +
* 'TWVkaWFCb3ggWyAwIDAgMjAwIDIwMCBdCiAgL0NvdW50IDEKICAvS2lkcyBbIDMgMCBSIF0K' +
* 'Pj4KZW5kb2JqCgozIDAgb2JqCjw8CiAgL1R5cGUgL1BhZ2UKICAvUGFyZW50IDIgMCBSCiAg' +
* 'L1Jlc291cmNlcyA8PAogICAgL0ZvbnQgPDwKICAgICAgL0YxIDQgMCBSIAogICAgPj4KICA+' +
* 'PgogIC9Db250ZW50cyA1IDAgUgo+PgplbmRvYmoKCjQgMCBvYmoKPDwKICAvVHlwZSAvRm9u' +
* 'dAogIC9TdWJ0eXBlIC9UeXBlMQogIC9CYXNlRm9udCAvVGltZXMtUm9tYW4KPj4KZW5kb2Jq' +
* 'Cgo1IDAgb2JqICAlIHBhZ2UgY29udGVudAo8PAogIC9MZW5ndGggNDQKPj4Kc3RyZWFtCkJU' +
* 'CjcwIDUwIFRECi9GMSAxMiBUZgooSGVsbG8sIHdvcmxkISkgVGoKRVQKZW5kc3RyZWFtCmVu' +
* 'ZG9iagoKeHJlZgowIDYKMDAwMDAwMDAwMCA2NTUzNSBmIAowMDAwMDAwMDEwIDAwMDAwIG4g' +
* 'CjAwMDAwMDAwNzkgMDAwMDAgbiAKMDAwMDAwMDE3MyAwMDAwMCBuIAowMDAwMDAwMzAxIDAw' +
* 'MDAwIG4gCjAwMDAwMDAzODAgMDAwMDAgbiAKdHJhaWxlcgo8PAogIC9TaXplIDYKICAvUm9v' +
* 'dCAxIDAgUgo+PgpzdGFydHhyZWYKNDkyCiUlRU9G',
* zoomEnabled: true
* });
* ```
*/
export function render(options: {
customWidth?: number;
webView: WebView;
base64pdf: string;
zoomEnabled?: boolean;
}): void {
const base64pdfParam = options.base64pdf.replace(/\n/g, '');
const html = htmlTemplate
.replace(
'__CUSTOM_WIDTH__',
String((options.customWidth || Screen.width) - 10)
)
.replace('$maximumScale', options.zoomEnabled ? '6.0' : '1.0')
.replace('$userScalable', options.zoomEnabled ? '1.0' : 'no')
.replace('$BASE64PDF', base64pdfParam);
options.webView.zoomEnabled = options.zoomEnabled || true;
options.webView.loadHTML(html);
}
export default {
render,
};