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//
// RouteUrlExpressionBuilder.cs
//
// Authors:
// Marek Habersack (mhabersack@novell.com)
//
// (C) 2010 Novell, Inc (http://novell.com)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.CodeDom;
using System.Web.Routing;
using System.Web.UI;
namespace System.Web.Compilation
{
[ExpressionEditor ("System.Web.UI.Design.RouteUrlExpressionEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
[ExpressionPrefix ("Routes")]
public class RouteUrlExpressionBuilder : ExpressionBuilder
{
static readonly char[] expressionSplitChars = { ',' };
static readonly char[] keyValueSplitChars = { '=' };
public override bool SupportsEvaluate { get { return true; } }
public RouteUrlExpressionBuilder ()
{
}
// This method is used only from within pages that aren't compiled
public override object EvaluateExpression (object target, BoundPropertyEntry entry, object parsedData, ExpressionBuilderContext context)
{
if (entry == null)
throw new NullReferenceException (".NET emulation (entry == null)");
if (context == null)
throw new NullReferenceException (".NET emulation (context == null)");
return GetRouteUrl (context.TemplateControl, entry.Expression);
}
public override CodeExpression GetCodeExpression (BoundPropertyEntry entry, object parsedData, ExpressionBuilderContext context)
{
if (entry == null)
throw new NullReferenceException (".NET emulation (entry == null)");
var ret = new CodeMethodInvokeExpression ();
ret.Method = new CodeMethodReferenceExpression (new CodeTypeReferenceExpression (typeof (RouteUrlExpressionBuilder)), "GetRouteUrl");
CodeExpressionCollection parameters = ret.Parameters;
parameters.Add (new CodeThisReferenceExpression ());
parameters.Add (new CodePrimitiveExpression (entry.Expression));
return ret;
}
public static string GetRouteUrl (Control control, string expression)
{
if (control == null)
throw new ArgumentNullException ("control");
string routeName;
var rvd = new RouteValueDictionary ();
if (!TryParseRouteExpression (expression, rvd, out routeName))
throw new InvalidOperationException ("Invalid expression, RouteUrlExpressionBuilder expects a string with format: RouteName=route,Key1=Value1,Key2=Value2");
return control.GetRouteUrl (routeName, rvd);
}
public static bool TryParseRouteExpression (string expression, RouteValueDictionary routeValues, out string routeName)
{
routeName = null;
if (String.IsNullOrEmpty (expression))
return false;
if (routeValues == null)
throw new NullReferenceException (".NET emulation (routeValues == null)");
string[] parts = expression.Split (expressionSplitChars);
foreach (string part in parts) {
string[] keyval = part.Split (keyValueSplitChars);
if (keyval.Length != 2)
return false;
string key = keyval [0].Trim ();
if (key == String.Empty)
return false;
if (String.Compare (key, "routename", StringComparison.OrdinalIgnoreCase) == 0) {
routeName = keyval [1].Trim ();
continue;
}
if (routeValues.ContainsKey (key))
routeValues [key] = keyval [1].Trim ();
else
routeValues.Add (key, keyval [1].Trim ());
}
return true;
}
}
}
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