openstack/deb-spice-html5
Code Issues Proposed changes

Extend the native ArrayBuffer to add a slice() method if missing.

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This allows IE10 to function.  Note that we would normally subclass
this type, but ArrayBuffer is implemented in native code, and so is
difficult to subclass.
This commit is contained in:
Jeremy White 2013-04-16 14:59:08 -05:00
parent ec9ae0cbd6
commit 78e0d938cf
2 changed files with 59 additions and 0 deletions
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1
spice.html
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@ -28,6 +28,7 @@
<head>
<title>Spice Javascript client</title>
<script src="spicearraybuffer.js"></script>
<script src="enums.js"></script>
<script src="atKeynames.js"></script>
<script src="utils.js"></script>

58
spicearraybuffer.js Normal file
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@ -0,0 +1,58 @@
"use strict";
/*
Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
This file is part of spice-html5.
spice-html5 is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
spice-html5 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with spice-html5. If not, see <http://www.gnu.org/licenses/>.
*/
/*----------------------------------------------------------------------------
** SpiceArrayBufferSlice
** This function is a work around for IE 10, which has no slice()
** method in it's subclass.
**--------------------------------------------------------------------------*/
function SpiceArrayBufferSlice(start, end)
{
start = start || 0;
end = end || this.byteLength;
if (end < 0)
end = this.byteLength + end;
if (start < 0)
start = this.byteLength + start;
if (start < 0)
start = 0;
if (end < 0)
end = 0;
if (end > this.byteLength)
end = this.byteLength;
if (start > end)
start = end;
var ret = new ArrayBuffer(end - start);
var in1 = new Uint8Array(this, start, end - start);
var out = new Uint8Array(ret);
var i;
for (i = 0; i < end - start; i++)
out[i] = in1[i];
return ret;
}
if (! ArrayBuffer.prototype.slice)
{
ArrayBuffer.prototype.slice = SpiceArrayBufferSlice;
console.log("WARNING: ArrayBuffer.slice() is missing; we are extending ArrayBuffer to compensate");
}