//Copyright 2010 Microsoft Corporation
//
//Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
//You may obtain a copy of the License at
//
//http://www.apache.org/licenses/LICENSE-2.0
//
//Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
//"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//See the License for the specific language governing permissions and limitations under the License.
namespace System.Data.Services.Http{
#region Namespaces.
using System;
using System.Diagnostics;
using System.Windows.Browser;
#endregion Namespaces.
internal static class ScriptObjectUtility
{
private const string HelperScript =
@"({
cd: function(f) { return function() { f(); }; },
callOpen: function(requestObj, method, uri) {
requestObj.open(method,uri,true);
},
setReadyStateChange: function(requestObj, o1) {
requestObj.onreadystatechange = o1;
},
setReadyStateChangeToNull: function(requestObj) {
try { requestObj.onreadystatechange = null; }
catch (e) { requestObj.onreadystatechange = new Function(); }
}
})";
private static readonly ScriptObject HelperScriptObject = (ScriptObject)HtmlPage.Window.Eval(HelperScript);
internal static ScriptObject ToScriptFunction(Delegate d)
{
Debug.Assert(d != null, "d != null");
return (ScriptObject)HelperScriptObject.Invoke("cd", d);
}
internal static void CallOpen(ScriptObject request, string method, string uri)
{
Debug.Assert(request != null, "request != null");
HelperScriptObject.Invoke("callOpen", request, method, uri);
}
internal static void SetReadyStateChange(ScriptObject request, ScriptObject callback)
{
Debug.Assert(request != null, "request != null");
if (callback == null)
{
HelperScriptObject.Invoke("setReadyStateChangeToNull", request);
}
else
{
HelperScriptObject.Invoke("setReadyStateChange", request, callback);
}
}
}
}
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