NamespaceTable.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.Activities / System / Activities / XamlIntegration / NamespaceTable.cs / 1305376 / NamespaceTable.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.Activities.XamlIntegration 
{
    using System.Collections.Generic; 
    using System.Xaml; 

    class NamespaceTable : IXamlNamespaceResolver 
    {
        List tempNamespaceList;
        Stack> namespaceStack;
        Dictionary namespacesCache; 

        public NamespaceTable() 
        { 
            this.tempNamespaceList = new List();
            this.namespaceStack = new Stack>(); 
        }

        public string GetNamespace(string prefix)
        { 
            NamespaceDeclaration result;
            if (this.namespacesCache == null) 
            { 
                ConstructNamespaceCache();
            } 

            if (this.namespacesCache.TryGetValue(prefix, out result))
            {
                return result.Namespace; 
            }
            else 
            { 
                return null;
            } 
        }

        public void ManageNamespace(XamlReader reader)
        { 
            switch (reader.NodeType)
            { 
                case XamlNodeType.NamespaceDeclaration: 
                    AddNamespace(reader.Namespace);
                    break; 
                case XamlNodeType.StartObject:
                case XamlNodeType.StartMember:
                case XamlNodeType.GetObject:
                    EnterScope(); 
                    break;
                case XamlNodeType.EndMember: 
                case XamlNodeType.EndObject: 
                    ExitScope();
                    break; 
            }
        }

        public void AddNamespace(NamespaceDeclaration xamlNamespace) 
        {
            this.tempNamespaceList.Add(xamlNamespace); 
            this.namespacesCache = null; 
        }
 
        public void EnterScope()
        {
            if (this.tempNamespaceList != null)
            { 
                this.namespaceStack.Push(this.tempNamespaceList);
                this.tempNamespaceList = new List(); 
            } 
        }
 
        public void ExitScope()
        {
            List namespaceList = this.namespaceStack.Pop();
            if (namespaceList.Count != 0) 
            {
                this.namespacesCache = null; 
            } 
        }
 
        public IEnumerable GetNamespacePrefixes()
        {
            if (this.namespacesCache == null)
            { 
                ConstructNamespaceCache();
            } 
 
            return this.namespacesCache.Values;
        } 

        void ConstructNamespaceCache()
        {
            Dictionary localNamespaces = new Dictionary(); 
            if (this.tempNamespaceList != null && this.tempNamespaceList.Count > 0)
            { 
                foreach (NamespaceDeclaration tempNamespace in tempNamespaceList) 
                {
                    if (!localNamespaces.ContainsKey(tempNamespace.Prefix)) 
                    {
                        localNamespaces.Add(tempNamespace.Prefix, tempNamespace);
                    }
                } 
            }
            foreach (List currentNamespaces in this.namespaceStack) 
            { 
                foreach (NamespaceDeclaration currentNamespace in currentNamespaces)
                { 
                    if (!localNamespaces.ContainsKey(currentNamespace.Prefix))
                    {
                        localNamespaces.Add(currentNamespace.Prefix, currentNamespace);
                    } 
                }
            } 
            this.namespacesCache = localNamespaces; 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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