96 lines
2.8 KiB
JavaScript
96 lines
2.8 KiB
JavaScript
"use strict";
|
|
|
|
var Object = require("./object");
|
|
|
|
var Blob = Object.inherit({
|
|
"className": "Blob",
|
|
"constructor": function(/*ArrayBuffer*/data) {
|
|
Object.fn.constructor.call(this);
|
|
|
|
data = data || new ArrayBuffer(0);
|
|
this._data = data;
|
|
},
|
|
"==": function(other) {
|
|
if (this.getType() !== other.getType()) {
|
|
return false;
|
|
}
|
|
|
|
return this.size() == other.size(); //TODO let's pretend one shall never wish to compare blobs)
|
|
},
|
|
"+=": function(other) {
|
|
if (this.getType() !== other.getType()) {
|
|
throw new Error("An attempt to add and assign an " + other.className + " to " + this.className);
|
|
}
|
|
|
|
var newData = new ArrayBuffer(this._data.byteLength + other._data.byteLength);
|
|
var newView = new Uint8Array(newData);
|
|
var thisView = new Uint8Array(this._data);
|
|
var otherView = new Uint8Array(other._data);
|
|
|
|
newView.set(thisView, 0);
|
|
newView.set(otherView, this._data.byteLength);
|
|
|
|
this._data = newData;
|
|
},
|
|
"+": function(other) {
|
|
if (this.getType() !== other.getType()) {
|
|
throw new Error("An attempt to add an " + other.className + " to " + this.className);
|
|
}
|
|
|
|
var newData = new ArrayBuffer(this._data.byteLength + other._data.byteLength);
|
|
var newView = new Uint8Array(newData);
|
|
var thisView = new Uint8Array(this._data);
|
|
var otherView = new Uint8Array(other._data);
|
|
|
|
newView.set(thisView, 0);
|
|
newView.set(otherView, this._data.byteLength);
|
|
|
|
return new Blob(newData);
|
|
},
|
|
"base64": function() {
|
|
var arr = new Uint8Array(this._data);
|
|
var bin = "";
|
|
for (var i = 0; i < arr.length; ++i) {
|
|
bin += String.fromCharCode(arr[i]);
|
|
}
|
|
|
|
return btoa(bin);
|
|
},
|
|
"clone": function() {
|
|
var clone = new Blob(this._data.slice(0));
|
|
|
|
return clone;
|
|
},
|
|
"deserialize": function(ba) {
|
|
var length = ba.pop32();
|
|
this._data = new ArrayBuffer(length);
|
|
var view = new Uint8Array(this._data);
|
|
|
|
for (var i = 0; i < length; ++i) {
|
|
view[i] = ba.pop8();
|
|
}
|
|
},
|
|
"length": function() {
|
|
return this._data.byteLength;
|
|
},
|
|
"serialize": function(ba) {
|
|
ba.push32(this._data.byteLength);
|
|
var view = new Uint8Array(this._data);
|
|
|
|
for (var i = 0; i < view.length; ++i) {
|
|
ba.push8(view[i]);
|
|
}
|
|
},
|
|
"size": function() {
|
|
return this._data.byteLength + 4;
|
|
},
|
|
"toString": function() {
|
|
return "File <" + this._data.byteLength + ">";
|
|
},
|
|
"valueOf": function() {
|
|
return this._data;
|
|
}
|
|
});
|
|
|
|
module.exports = Blob;
|