talksik/Blob.js
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This commit is contained in:
Jimmy Wärting
2019-04-17 19:47:12 +02:00
parent 20316adffb
commit a8d8821e81
1 changed files with 143 additions and 150 deletions
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Blob.js
+77 -84
View File
@@ -9,7 +9,6 @@
*/
;(function () {
var global = typeof window === 'object'
? window : typeof self === 'object'
? self : this
@@ -17,7 +16,7 @@
var BlobBuilder = global.BlobBuilder
|| global.WebKitBlobBuilder
|| global.MSBlobBuilder
|| global.MozBlobBuilder;
|| global.MozBlobBuilder
global.URL = global.URL || global.webkitURL || function (href, a) {
a = document.createElement('a')
@@ -34,7 +33,7 @@
var arrayBufferSupported = !!global.ArrayBuffer
var blobBuilderSupported = BlobBuilder
&& BlobBuilder.prototype.append
&& BlobBuilder.prototype.getBlob;
&& BlobBuilder.prototype.getBlob
try {
// Check if Blob constructor is supported
@@ -53,105 +52,103 @@
function mapArrayBufferViews (ary) {
return ary.map(function (chunk) {
if (chunk.buffer instanceof ArrayBuffer) {
var buf = chunk.buffer;
var buf = chunk.buffer
// if this is a subarray, make a copy so we only
// include the subarray region from the underlying buffer
if (chunk.byteLength !== buf.byteLength) {
var copy = new Uint8Array(chunk.byteLength);
copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));
buf = copy.buffer;
var copy = new Uint8Array(chunk.byteLength)
copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength))
buf = copy.buffer
}
return buf;
return buf
}
return chunk;
});
return chunk
})
}
function BlobBuilderConstructor (ary, options) {
options = options || {};
options = options || {}
var bb = new BlobBuilder();
var bb = new BlobBuilder()
mapArrayBufferViews(ary).forEach(function (part) {
bb.append(part);
});
bb.append(part)
})
return options.type ? bb.getBlob(options.type) : bb.getBlob();
};
return options.type ? bb.getBlob(options.type) : bb.getBlob()
}
function BlobConstructor (ary, options) {
return new origBlob(mapArrayBufferViews(ary), options || {});
};
return new origBlob(mapArrayBufferViews(ary), options || {})
}
if (global.Blob) {
BlobBuilderConstructor.prototype = Blob.prototype;
BlobConstructor.prototype = Blob.prototype;
BlobBuilderConstructor.prototype = Blob.prototype
BlobConstructor.prototype = Blob.prototype
}
function FakeBlobBuilder () {
function toUTF8Array (str) {
var utf8 = [];
var utf8 = []
for (var i = 0; i < str.length; i++) {
var charcode = str.charCodeAt(i);
if (charcode < 0x80) utf8.push(charcode);
var charcode = str.charCodeAt(i)
if (charcode < 0x80) utf8.push(charcode)
else if (charcode < 0x800) {
utf8.push(0xc0 | (charcode >> 6),
0x80 | (charcode & 0x3f));
}
else if (charcode < 0xd800 || charcode >= 0xe000) {
0x80 | (charcode & 0x3f))
} else if (charcode < 0xd800 || charcode >= 0xe000) {
utf8.push(0xe0 | (charcode >> 12),
0x80 | ((charcode >> 6) & 0x3f),
0x80 | (charcode & 0x3f));
0x80 | (charcode & 0x3f))
}
// surrogate pair
else {
i++;
i++
// UTF-16 encodes 0x10000-0x10FFFF by
// subtracting 0x10000 and splitting the
// 20 bits of 0x0-0xFFFFF into two halves
charcode = 0x10000 + (((charcode & 0x3ff) << 10)
| (str.charCodeAt(i) & 0x3ff));
| (str.charCodeAt(i) & 0x3ff))
utf8.push(0xf0 | (charcode >> 18),
0x80 | ((charcode >> 12) & 0x3f),
0x80 | ((charcode >> 6) & 0x3f),
0x80 | (charcode & 0x3f));
0x80 | (charcode & 0x3f))
}
}
return utf8;
return utf8
}
function fromUtf8Array (array) {
var out, i, len, c;
var char2, char3;
var out, i, len, c
var char2, char3
out = "";
len = array.length;
i = 0;
out = ''
len = array.length
i = 0
while (i < len) {
c = array[i++];
switch (c >> 4)
{
c = array[i++]
switch (c >> 4) {
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
// 0xxxxxxx
out += String.fromCharCode(c);
break;
out += String.fromCharCode(c)
break
case 12: case 13:
// 110x xxxx 10xx xxxx
char2 = array[i++];
out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
break;
char2 = array[i++]
out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F))
break
case 14:
// 1110 xxxx 10xx xxxx 10xx xxxx
char2 = array[i++];
char3 = array[i++];
char2 = array[i++]
char3 = array[i++]
out += String.fromCharCode(((c & 0x0F) << 12) |
((char2 & 0x3F) << 6) |
((char3 & 0x3F) << 0));
break;
((char3 & 0x3F) << 0))
break
}
}
return out;
return out
}
function isDataView (obj) {
return obj && DataView.prototype.isPrototypeOf(obj)
@@ -166,27 +163,27 @@
return view
}
function encodeByteArray (input) {
var byteToCharMap = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
var byteToCharMap = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='
var output = [];
var output = []
for (var i = 0; i < input.length; i += 3) {
var byte1 = input[i];
var haveByte2 = i + 1 < input.length;
var byte2 = haveByte2 ? input[i + 1] : 0;
var haveByte3 = i + 2 < input.length;
var byte3 = haveByte3 ? input[i + 2] : 0;
var byte1 = input[i]
var haveByte2 = i + 1 < input.length
var byte2 = haveByte2 ? input[i + 1] : 0
var haveByte3 = i + 2 < input.length
var byte3 = haveByte3 ? input[i + 2] : 0
var outByte1 = byte1 >> 2;
var outByte2 = ((byte1 & 0x03) << 4) | (byte2 >> 4);
var outByte3 = ((byte2 & 0x0F) << 2) | (byte3 >> 6);
var outByte4 = byte3 & 0x3F;
var outByte1 = byte1 >> 2
var outByte2 = ((byte1 & 0x03) << 4) | (byte2 >> 4)
var outByte3 = ((byte2 & 0x0F) << 2) | (byte3 >> 6)
var outByte4 = byte3 & 0x3F
if (!haveByte3) {
outByte4 = 64;
outByte4 = 64
if (!haveByte2) {
outByte3 = 64;
outByte3 = 64
}
}
@@ -200,8 +197,8 @@
var create = Object.create || function (a) {
function c () {}
c.prototype = a;
return new c
c.prototype = a
return new c()
}
if (arrayBufferSupported) {
@@ -222,8 +219,6 @@
}
}
/********************************************************/
/* Blob constructor */
/********************************************************/
@@ -258,8 +253,6 @@
return '[object Blob]'
}
/********************************************************/
/* File constructor */
/********************************************************/
@@ -267,18 +260,18 @@
opts = opts || {}
var a = Blob.call(this, chunks, opts) || this
a.name = name
a.lastModifiedDate = opts.lastModified ? new Date(opts.lastModified) : new Date
a.lastModifiedDate = opts.lastModified ? new Date(opts.lastModified) : new Date()
a.lastModified = +a.lastModifiedDate
return a
}
File.prototype = create(Blob.prototype);
File.prototype.constructor = File;
File.prototype = create(Blob.prototype)
File.prototype.constructor = File
if (Object.setPrototypeOf)
Object.setPrototypeOf(File, Blob);
else {
if (Object.setPrototypeOf) {
Object.setPrototypeOf(File, Blob)
} else {
try { File.__proto__ = Blob } catch (e) {}
}
@@ -286,13 +279,13 @@
return '[object File]'
}
/********************************************************/
/* FileReader constructor */
/********************************************************/
function FileReader () {
if (!(this instanceof FileReader))
if (!(this instanceof FileReader)) {
throw new TypeError("Failed to construct 'FileReader': Please use the 'new' operator, this DOM object constructor cannot be called as a function.")
}
var delegate = document.createDocumentFragment()
this.addEventListener = delegate.addEventListener
@@ -305,8 +298,9 @@
}
function _read (fr, blob, kind) {
if (!(blob instanceof Blob))
if (!(blob instanceof Blob)) {
throw new TypeError("Failed to execute '" + kind + "' on 'FileReader': parameter 1 is not of type 'Blob'.")
}
fr.result = ''
@@ -345,7 +339,6 @@
FileReader.prototype.abort = function () {}
/********************************************************/
/* URL */
/********************************************************/
@@ -415,7 +408,7 @@
'opts = opts || {};' +
'super(chunks, opts || {});' +
'this.name = name;' +
'this.lastModifiedDate = opts.lastModified ? new Date(opts.lastModified) : new Date;' +
'this.lastModifiedDate = opts.lastModified ? new Date(opts.lastModified) : new Date();' +
'this.lastModified = +this.lastModifiedDate;' +
'}};' +
'return new File([], ""), File'
@@ -424,7 +417,7 @@
} catch (e) {
var klass = function (b, d, c) {
var blob = new Blob(b, c)
var t = c && void 0 !== c.lastModified ? new Date(c.lastModified) : new Date
var t = c && void 0 !== c.lastModified ? new Date(c.lastModified) : new Date()
blob.name = d
blob.lastModifiedDate = t
@@ -433,8 +426,9 @@
return '[object File]'
}
if (strTag)
if (strTag) {
blob[strTag] = 'File'
}
return blob
}
@@ -448,9 +442,8 @@
global.Blob = blobSupportsArrayBufferView ? global.Blob : BlobConstructor
} else if (blobBuilderSupported) {
fixFileAndXHR()
global.Blob = BlobBuilderConstructor;
global.Blob = BlobBuilderConstructor
} else {
FakeBlobBuilder()
}
})();
})()