potree-sdk/libs/jszip-utils/lib/index_IE.js

/* jshint evil: true, newcap: false */
/* global IEBinaryToArray_ByteStr, IEBinaryToArray_ByteStr_Last */
"use strict";

// Adapted from http://stackoverflow.com/questions/1095102/how-do-i-load-binary-image-data-using-javascript-and-xmlhttprequest
var IEBinaryToArray_ByteStr_Script =
    "<!-- IEBinaryToArray_ByteStr -->\r\n"+
    "<script type='text/vbscript'>\r\n"+
    "Function IEBinaryToArray_ByteStr(Binary)\r\n"+
    "   IEBinaryToArray_ByteStr = CStr(Binary)\r\n"+
    "End Function\r\n"+
    "Function IEBinaryToArray_ByteStr_Last(Binary)\r\n"+
    "   Dim lastIndex\r\n"+
    "   lastIndex = LenB(Binary)\r\n"+
    "   if lastIndex mod 2 Then\r\n"+
    "       IEBinaryToArray_ByteStr_Last = Chr( AscB( MidB( Binary, lastIndex, 1 ) ) )\r\n"+
    "   Else\r\n"+
    "       IEBinaryToArray_ByteStr_Last = "+'""'+"\r\n"+
    "   End If\r\n"+
    "End Function\r\n"+
    "</script>\r\n";

// inject VBScript
document.write(IEBinaryToArray_ByteStr_Script);

global.JSZipUtils._getBinaryFromXHR = function (xhr) {
    var binary = xhr.responseBody;
    var byteMapping = {};
    for ( var i = 0; i < 256; i++ ) {
        for ( var j = 0; j < 256; j++ ) {
            byteMapping[ String.fromCharCode( i + (j << 8) ) ] =
                String.fromCharCode(i) + String.fromCharCode(j);
        }
    }
    var rawBytes = IEBinaryToArray_ByteStr(binary);
    var lastChr = IEBinaryToArray_ByteStr_Last(binary);
    return rawBytes.replace(/[\s\S]/g, function( match ) {
        return byteMapping[match];
    }) + lastChr;
};

// enforcing Stuk's coding style
// vim: set shiftwidth=4 softtabstop=4: