https://jspaint.app/lib/FileSaver.js

1(function (global, factory) {
2  if (typeof define === "function" && define.amd) {
3    define([], factory);
4  } else if (typeof exports !== "undefined") {
5    factory();
6  } else {
7    var mod = {
8      exports: {}
9    };
10    factory();
11    global.FileSaver = mod.exports;
12  }
13})(this, function () {
14  "use strict";
15
16  /*
17  * FileSaver.js
18  * A saveAs() FileSaver implementation.
19  *
20  * By Eli Grey, http://eligrey.com
21  *
22  * License : https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md (MIT)
23  * source  : http://purl.eligrey.com/github/FileSaver.js
24  */
25  // The one and only way of getting global scope in all environments
26  // https://stackoverflow.com/q/3277182/1008999
27  var _global = typeof window === 'object' && window.window === window ? window : typeof self === 'object' && self.self === self ? self : typeof global === 'object' && global.global === global ? global : void 0;
28
29  function bom(blob, opts) {
30    if (typeof opts === 'undefined') opts = {
31      autoBom: false
32    };else if (typeof opts !== 'object') {
33      console.warn('Deprecated: Expected third argument to be a object');
34      opts = {
35        autoBom: !opts
36      };
37    } // prepend BOM for UTF-8 XML and text/* types (including HTML)
38    // note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF
39
40    if (opts.autoBom && /^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) {
41      return new Blob([String.fromCharCode(0xFEFF), blob], {
42        type: blob.type
43      });
44    }
45
46    return blob;
47  }
48
49  function download(url, name, opts) {
50    var xhr = new XMLHttpRequest();
51    xhr.open('GET', url);
52    xhr.responseType = 'blob';
53
54    xhr.onload = function () {
55      saveAs(xhr.response, name, opts);
56    };
57
58    xhr.onerror = function () {
59      console.error('could not download file');
60    };
61
62    xhr.send();
63  }
64
65  function corsEnabled(url) {
66    var xhr = new XMLHttpRequest(); // use sync to avoid popup blocker
67
68    xhr.open('HEAD', url, false);
69
70    try {
71      xhr.send();
72    } catch (e) {}
73
74    return xhr.status >= 200 && xhr.status <= 299;
75  } // `a.click()` doesn't work for all browsers (#465)
76
77
78  function click(node) {
79    try {
80      node.dispatchEvent(new MouseEvent('click'));
81    } catch (e) {
82      var evt = document.createEvent('MouseEvents');
83      evt.initMouseEvent('click', true, true, window, 0, 0, 0, 80, 20, false, false, false, false, 0, null);
84      node.dispatchEvent(evt);
85    }
86  } // Detect WebView inside a native macOS app by ruling out all browsers
87  // We just need to check for 'Safari' because all other browsers (besides Firefox) include that too
88  // https://www.whatismybrowser.com/guides/the-latest-user-agent/macos
89
90
91  var isMacOSWebView =

91 /Macintosh/.test(navigator.userAgent) && /AppleWebKit/.test(navigator.userAgent) && !/Safari/.test(navigator.userAgent);
92  var saveAs = _global.saveAs || ( // probably in some web worker
93  typeof window !== 'object' || window !== _global ? function saveAs() {}
94  /* noop */
95  // Use download attribute first if possible (#193 Lumia mobile) unless this is a macOS WebView
96  : 'download' in HTMLAnchorElement.prototype && !isMacOSWebView ? function saveAs(blob, name, opts) {
97    var URL = _global.URL || _global.webkitURL;
98    var a = document.createElement('a');
99    name = name || blob.name || 'download';
100    a.download = name;
101    a.rel = 'noopener'; // tabnabbing
102    // TODO: detect chrome extensions & packaged apps
103    // a.target = '_blank'
104
105    if (typeof blob === 'string') {
106      // Support regular links
107      a.href = blob;
108
109      if (a.origin !== location.origin) {
110        corsEnabled(a.href) ? download(blob, name, opts) : click(a, a.target = '_blank');
111      } else {
112        click(a);
113      }
114    } else {
115      // Support blobs
116      a.href = URL.createObjectURL(blob);
117      setTimeout(function () {
118        URL.revokeObjectURL(a.href);
119      }, 4E4); // 40s
120
121      setTimeout(function () {
122        click(a);
123      }, 0);
124    }
125  } // Use msSaveOrOpenBlob as a second approach
126  : 'msSaveOrOpenBlob' in navigator ? function saveAs(blob, name, opts) {
127    name = name || blob.name || 'download';
128
129    if (typeof blob === 'string') {
130      if (corsEnabled(blob)) {
131        download(blob, name, opts);
132      } else {
133        var a = document.createElement('a');
134        a.href = blob;
135        a.target = '_blank';
136        setTimeout(function () {
137          click(a);
138        });
139      }
140    } else {
141      navigator.msSaveOrOpenBlob(bom(blob, opts), name);
142    }
143  } // Fallback to using FileReader and a popup
144  : function saveAs(blob, name, opts, popup) {
145    // Open a popup immediately do go around popup blocker
146    // Mostly only available on user interaction and the fileReader is async so...
147    popup = popup || open('', '_blank');
148
149    if (popup) {
150      popup.document.title = popup.document.body.innerText = 'downloading...';
151    }
152
153    if (typeof blob === 'string') return download(blob, name, opts);
154    var force = blob.type === 'application/octet-stream';
155
156    var isSafari = /constructor/i.test(_global.HTMLElement) || _global.safari;
157
158    var isChromeIOS = /CriOS\/[\d]+/.test(navigator.userAgent);
159
160    if ((isChromeIOS || force && isSafari || isMacOSWebView) && typeof FileReader !== 'undefined') {
161      // Safari doesn't allow downloading of blob URLs
162      var reader = new FileReader();
163
164      reader.onloadend = function () {
165        var url = reader.result;
166        url = isChromeIOS ? url : url.replace(/^data:[^;]*;/, 'data:attachment/file;');
167        if (popup) popup.location.href = url;else location = url;
168        popup = null; // reverse-tabnabbing #460
169      };
170
171      reader.readAsDataURL(blob);
172    } else {
173      var URL = _global.URL || _global.webkitURL;
174      var url = URL.createObjectURL(blob);
175      if (popup) popup.location = url;else location.href = url;
176      popup = null; // reverse-tabnabbing #460
177
178      setTimeout(function () {
179        URL.revokeObjectURL(url);
180      }, 4E4); // 40s
181    }
182  });
183  _global.saveAs = saveAs.saveAs = saveAs;
184
185  if (typeof module !== 'undefined') {
186    module.exports = saveAs;
187  }
188});