GlobalEventManager.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / GlobalEventManager.cs / 1305600 / GlobalEventManager.cs
                        
                        
                            using System; 
using System.Collections;
using System.Diagnostics;
using MS.Utility;
 
using SR=MS.Internal.PresentationCore.SR;
using SRID=MS.Internal.PresentationCore.SRID; 
 
namespace System.Windows
{ 
    internal static class GlobalEventManager
    {
        #region Operations
 
        // Registers a RoutedEvent with the given details
        // NOTE: The Name must be unique within the given OwnerType 
        internal static RoutedEvent RegisterRoutedEvent( 
            string name,
            RoutingStrategy routingStrategy, 
            Type handlerType,
            Type ownerType)
        {
            Debug.Assert(GetRoutedEventFromName(name, ownerType, false) == null, 
                                "RoutedEvent name must be unique within a given OwnerType");
 
            lock (Synchronized) 
            {
                // Create a new RoutedEvent 
                // Requires GlobalLock to access _countRoutedEvents
                RoutedEvent routedEvent = new RoutedEvent(
                    name,
                    routingStrategy, 
                    handlerType,
                    ownerType); 
 
                // Increment the count for registered RoutedEvents
                // Requires GlobalLock to access _countRoutedEvents 
                _countRoutedEvents++;

                AddOwner(routedEvent, ownerType);
 
                return routedEvent;
            } 
        } 

        // Register a Class Handler 
        // NOTE: Handler Type must be the
        // same as the one specified when
        // registering the corresponding RoutedEvent
        internal static void RegisterClassHandler( 
            Type classType,
            RoutedEvent routedEvent, 
            Delegate handler, 
            bool handledEventsToo)
        { 
            Debug.Assert(
                typeof(UIElement).IsAssignableFrom(classType) ||
                typeof(ContentElement).IsAssignableFrom(classType) ||
                typeof(UIElement3D).IsAssignableFrom(classType), 
                "Class Handlers can be registered only for UIElement/ContentElement/UIElement3D and their sub types");
            Debug.Assert(routedEvent.IsLegalHandler(handler), 
                                "Handler Type mismatch"); 

            ClassHandlersStore classListenersLists; 
            int index;

            // We map the classType to a DType use DTypeMap for storage
            DependencyObjectType dType = DependencyObjectType.FromSystemTypeInternal(classType); 

            // Get the updated EventHandlersStore for the given DType 
            GetDTypedClassListeners(dType, routedEvent, out classListenersLists, out index); 

            // Reuired to update storage 
            lock (Synchronized)
            {
                // Add new routed event handler and get the updated set of handlers
                RoutedEventHandlerInfoList updatedClassListeners = 
                    classListenersLists.AddToExistingHandlers(index, handler, handledEventsToo);
 
                // Update Sub Classes 
                ItemStructList keys = _dTypedClassListeners.ActiveDTypes;
 
                for (int i=0; i keys = _dTypedRoutedEventList.ActiveDTypes; 

                int destIndex = 0; 
                for (int i=0; i dTypedRoutedEventList = (FrugalObjectList)_dTypedRoutedEventList[keys.List[i]];
 
                    for(int j = 0; j < dTypedRoutedEventList.Count; j++)
                    { 
                        RoutedEvent routedEvent = dTypedRoutedEventList[j]; 

                        if(Array.IndexOf(routedEvents, routedEvent) < 0) 
                        {
                            routedEvents[destIndex++] = routedEvent;
                        }
                    } 
                }
 
                // Enumerate through all of the RoutedEvents in the Hashtable 
                // Requires GlobalLock to access _ownerTypedRoutedEventList
                IDictionaryEnumerator htEnumerator = _ownerTypedRoutedEventList.GetEnumerator(); 

                while(htEnumerator.MoveNext() == true)
                {
                    FrugalObjectList ownerRoutedEventList = (FrugalObjectList)htEnumerator.Value; 

                    for(int j = 0; j < ownerRoutedEventList.Count; j++) 
                    { 
                        RoutedEvent routedEvent = ownerRoutedEventList[j];
 
                        if(Array.IndexOf(routedEvents, routedEvent) < 0)
                        {
                            routedEvents[destIndex++] = routedEvent;
                        } 
                    }
                } 
            } 

            return routedEvents; 
        }

        internal static void AddOwner(RoutedEvent routedEvent, Type ownerType)
        { 
            // If the ownerType is a subclass of DependencyObject
            // we map it to a DType use DTypeMap for storage else 
            // we use the more generic Hashtable. 
            if ((ownerType == typeof(DependencyObject)) || ownerType.IsSubclassOf(typeof(DependencyObject)))
            { 
                DependencyObjectType dType = DependencyObjectType.FromSystemTypeInternal(ownerType);

                // Get the ItemList of RoutedEvents for the given OwnerType
                // Requires GlobalLock to access _dTypedRoutedEventList 
                object ownerRoutedEventListObj = _dTypedRoutedEventList[dType];
                FrugalObjectList ownerRoutedEventList; 
                if (ownerRoutedEventListObj == null) 
                {
                    // Create an ItemList of RoutedEvents for the 
                    // given OwnerType if one does not already exist
                    ownerRoutedEventList = new FrugalObjectList(1);
                    _dTypedRoutedEventList[dType] = ownerRoutedEventList;
                } 
                else
                { 
                    ownerRoutedEventList = (FrugalObjectList)ownerRoutedEventListObj; 
                }
 
                // Add the newly created
                // RoutedEvent to the ItemList
                // Requires GlobalLock to access ownerRoutedEventList
                if(!ownerRoutedEventList.Contains(routedEvent)) 
                {
                    ownerRoutedEventList.Add(routedEvent); 
                } 
            }
            else 
            {
                // Get the ItemList of RoutedEvents for the given OwnerType
                // Requires GlobalLock to access _ownerTypedRoutedEventList
                object ownerRoutedEventListObj = _ownerTypedRoutedEventList[ownerType]; 
                FrugalObjectList ownerRoutedEventList;
                if (ownerRoutedEventListObj == null) 
                { 
                    // Create an ItemList of RoutedEvents for the
                    // given OwnerType if one does not already exist 
                    ownerRoutedEventList = new FrugalObjectList(1);
                    _ownerTypedRoutedEventList[ownerType] = ownerRoutedEventList;
                }
                else 
                {
                    ownerRoutedEventList = (FrugalObjectList)ownerRoutedEventListObj; 
                } 

                // Add the newly created 
                // RoutedEvent to the ItemList
                // Requires GlobalLock to access ownerRoutedEventList
                if(!ownerRoutedEventList.Contains(routedEvent))
                { 
                    ownerRoutedEventList.Add(routedEvent);
                } 
            } 
        }
 
        // Returns a RoutedEvents that match
        // the ownerType input param
        // If not found returns null
        internal static RoutedEvent[] GetRoutedEventsForOwner(Type ownerType) 
        {
            if ((ownerType == typeof(DependencyObject)) || ownerType.IsSubclassOf(typeof(DependencyObject))) 
            { 
                // Search DTypeMap
                DependencyObjectType dType = DependencyObjectType.FromSystemTypeInternal(ownerType); 

                // Get the ItemList of RoutedEvents for the given DType
                FrugalObjectList ownerRoutedEventList = (FrugalObjectList)_dTypedRoutedEventList[dType];
                if (ownerRoutedEventList != null) 
                {
                    return ownerRoutedEventList.ToArray(); 
                } 
            }
            else // Search Hashtable 
            {
                // Get the ItemList of RoutedEvents for the given OwnerType
                FrugalObjectList ownerRoutedEventList = (FrugalObjectList)_ownerTypedRoutedEventList[ownerType];
                if (ownerRoutedEventList != null) 
                {
                    return ownerRoutedEventList.ToArray(); 
                } 
            }
 
            // No match found
            return null;
        }
 
        // Returns a RoutedEvents that match
        // the name and ownerType input params 
        // If not found returns null 
        internal static RoutedEvent GetRoutedEventFromName(
            string name, 
            Type ownerType,
            bool includeSupers)
        {
            if ((ownerType == typeof(DependencyObject)) || ownerType.IsSubclassOf(typeof(DependencyObject))) 
            {
                // Search DTypeMap 
                DependencyObjectType dType = DependencyObjectType.FromSystemTypeInternal(ownerType); 

                while (dType != null) 
                {
                    // Get the ItemList of RoutedEvents for the given DType
                    FrugalObjectList ownerRoutedEventList = (FrugalObjectList)_dTypedRoutedEventList[dType];
                    if (ownerRoutedEventList != null) 
                    {
                        // Check for RoutedEvent with matching name in the ItemList 
                        for (int i=0; i ownerRoutedEventList = (FrugalObjectList)_ownerTypedRoutedEventList[ownerType];
                    if (ownerRoutedEventList != null)
                    {
                        // Check for RoutedEvent with matching name in the ItemList 
                        for (int i=0; i= Int32.MaxValue)
                {
                    throw new InvalidOperationException(SR.Get(SRID.TooManyRoutedEvents)); 
                }
 
                index = _globalIndexToEventMap.Add(value); 
            }
            return index; 
        }

        // Must be called from within a lock of GlobalEventManager.Synchronized
        internal static object EventFromGlobalIndex(int globalIndex) 
        {
            return _globalIndexToEventMap[globalIndex]; 
        } 

        // must be used within a lock of GlobalEventManager.Synchronized 
        private static ArrayList _globalIndexToEventMap = new ArrayList(100); //

        #endregion
 
        #region Data
 
        // This is an efficient  Hashtable of ItemLists keyed on DType 
        // Each ItemList holds the registered RoutedEvents for that OwnerType
        private static DTypeMap _dTypedRoutedEventList = new DTypeMap(10); // Initialization sizes based on typical MSN scenario 

        // This is a Hashtable of ItemLists keyed on OwnerType
        // Each ItemList holds the registered RoutedEvents for that OwnerType
        private static Hashtable _ownerTypedRoutedEventList = new Hashtable(10); // Initialization sizes based on typical MSN scenario 

        // This member keeps a count of the total number of Routed Events registered so far 
        // The member also serves as the internally used ComputedEventIndex that indexes 
        // EventListenersListss that store class handler information for a class type
        private static int _countRoutedEvents = 0; 

        // This is an efficient Hashtable of ItemLists keyed on DType
        // Each ItemList holds the registered RoutedEvent class handlers for that ClassType
        private static DTypeMap _dTypedClassListeners = new DTypeMap(100); // Initialization sizes based on typical Expression Blend startup scenario 

        // This is the cached value for the DType of DependencyObject 
        private static DependencyObjectType _dependencyObjectType = DependencyObjectType.FromSystemTypeInternal(typeof(DependencyObject)); 

        internal static object Synchronized = new object(); 

        #endregion Data
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
using System; 
using System.Collections;
using System.Diagnostics;
using MS.Utility;
 
using SR=MS.Internal.PresentationCore.SR;
using SRID=MS.Internal.PresentationCore.SRID; 
 
namespace System.Windows
{ 
    internal static class GlobalEventManager
    {
        #region Operations
 
        // Registers a RoutedEvent with the given details
        // NOTE: The Name must be unique within the given OwnerType 
        internal static RoutedEvent RegisterRoutedEvent( 
            string name,
            RoutingStrategy routingStrategy, 
            Type handlerType,
            Type ownerType)
        {
            Debug.Assert(GetRoutedEventFromName(name, ownerType, false) == null, 
                                "RoutedEvent name must be unique within a given OwnerType");
 
            lock (Synchronized) 
            {
                // Create a new RoutedEvent 
                // Requires GlobalLock to access _countRoutedEvents
                RoutedEvent routedEvent = new RoutedEvent(
                    name,
                    routingStrategy, 
                    handlerType,
                    ownerType); 
 
                // Increment the count for registered RoutedEvents
                // Requires GlobalLock to access _countRoutedEvents 
                _countRoutedEvents++;

                AddOwner(routedEvent, ownerType);
 
                return routedEvent;
            } 
        } 

        // Register a Class Handler 
        // NOTE: Handler Type must be the
        // same as the one specified when
        // registering the corresponding RoutedEvent
        internal static void RegisterClassHandler( 
            Type classType,
            RoutedEvent routedEvent, 
            Delegate handler, 
            bool handledEventsToo)
        { 
            Debug.Assert(
                typeof(UIElement).IsAssignableFrom(classType) ||
                typeof(ContentElement).IsAssignableFrom(classType) ||
                typeof(UIElement3D).IsAssignableFrom(classType), 
                "Class Handlers can be registered only for UIElement/ContentElement/UIElement3D and their sub types");
            Debug.Assert(routedEvent.IsLegalHandler(handler), 
                                "Handler Type mismatch"); 

            ClassHandlersStore classListenersLists; 
            int index;

            // We map the classType to a DType use DTypeMap for storage
            DependencyObjectType dType = DependencyObjectType.FromSystemTypeInternal(classType); 

            // Get the updated EventHandlersStore for the given DType 
            GetDTypedClassListeners(dType, routedEvent, out classListenersLists, out index); 

            // Reuired to update storage 
            lock (Synchronized)
            {
                // Add new routed event handler and get the updated set of handlers
                RoutedEventHandlerInfoList updatedClassListeners = 
                    classListenersLists.AddToExistingHandlers(index, handler, handledEventsToo);
 
                // Update Sub Classes 
                ItemStructList keys = _dTypedClassListeners.ActiveDTypes;
 
                for (int i=0; i keys = _dTypedRoutedEventList.ActiveDTypes; 

                int destIndex = 0; 
                for (int i=0; i dTypedRoutedEventList = (FrugalObjectList)_dTypedRoutedEventList[keys.List[i]];
 
                    for(int j = 0; j < dTypedRoutedEventList.Count; j++)
                    { 
                        RoutedEvent routedEvent = dTypedRoutedEventList[j]; 

                        if(Array.IndexOf(routedEvents, routedEvent) < 0) 
                        {
                            routedEvents[destIndex++] = routedEvent;
                        }
                    } 
                }
 
                // Enumerate through all of the RoutedEvents in the Hashtable 
                // Requires GlobalLock to access _ownerTypedRoutedEventList
                IDictionaryEnumerator htEnumerator = _ownerTypedRoutedEventList.GetEnumerator(); 

                while(htEnumerator.MoveNext() == true)
                {
                    FrugalObjectList ownerRoutedEventList = (FrugalObjectList)htEnumerator.Value; 

                    for(int j = 0; j < ownerRoutedEventList.Count; j++) 
                    { 
                        RoutedEvent routedEvent = ownerRoutedEventList[j];
 
                        if(Array.IndexOf(routedEvents, routedEvent) < 0)
                        {
                            routedEvents[destIndex++] = routedEvent;
                        } 
                    }
                } 
            } 

            return routedEvents; 
        }

        internal static void AddOwner(RoutedEvent routedEvent, Type ownerType)
        { 
            // If the ownerType is a subclass of DependencyObject
            // we map it to a DType use DTypeMap for storage else 
            // we use the more generic Hashtable. 
            if ((ownerType == typeof(DependencyObject)) || ownerType.IsSubclassOf(typeof(DependencyObject)))
            { 
                DependencyObjectType dType = DependencyObjectType.FromSystemTypeInternal(ownerType);

                // Get the ItemList of RoutedEvents for the given OwnerType
                // Requires GlobalLock to access _dTypedRoutedEventList 
                object ownerRoutedEventListObj = _dTypedRoutedEventList[dType];
                FrugalObjectList ownerRoutedEventList; 
                if (ownerRoutedEventListObj == null) 
                {
                    // Create an ItemList of RoutedEvents for the 
                    // given OwnerType if one does not already exist
                    ownerRoutedEventList = new FrugalObjectList(1);
                    _dTypedRoutedEventList[dType] = ownerRoutedEventList;
                } 
                else
                { 
                    ownerRoutedEventList = (FrugalObjectList)ownerRoutedEventListObj; 
                }
 
                // Add the newly created
                // RoutedEvent to the ItemList
                // Requires GlobalLock to access ownerRoutedEventList
                if(!ownerRoutedEventList.Contains(routedEvent)) 
                {
                    ownerRoutedEventList.Add(routedEvent); 
                } 
            }
            else 
            {
                // Get the ItemList of RoutedEvents for the given OwnerType
                // Requires GlobalLock to access _ownerTypedRoutedEventList
                object ownerRoutedEventListObj = _ownerTypedRoutedEventList[ownerType]; 
                FrugalObjectList ownerRoutedEventList;
                if (ownerRoutedEventListObj == null) 
                { 
                    // Create an ItemList of RoutedEvents for the
                    // given OwnerType if one does not already exist 
                    ownerRoutedEventList = new FrugalObjectList(1);
                    _ownerTypedRoutedEventList[ownerType] = ownerRoutedEventList;
                }
                else 
                {
                    ownerRoutedEventList = (FrugalObjectList)ownerRoutedEventListObj; 
                } 

                // Add the newly created 
                // RoutedEvent to the ItemList
                // Requires GlobalLock to access ownerRoutedEventList
                if(!ownerRoutedEventList.Contains(routedEvent))
                { 
                    ownerRoutedEventList.Add(routedEvent);
                } 
            } 
        }
 
        // Returns a RoutedEvents that match
        // the ownerType input param
        // If not found returns null
        internal static RoutedEvent[] GetRoutedEventsForOwner(Type ownerType) 
        {
            if ((ownerType == typeof(DependencyObject)) || ownerType.IsSubclassOf(typeof(DependencyObject))) 
            { 
                // Search DTypeMap
                DependencyObjectType dType = DependencyObjectType.FromSystemTypeInternal(ownerType); 

                // Get the ItemList of RoutedEvents for the given DType
                FrugalObjectList ownerRoutedEventList = (FrugalObjectList)_dTypedRoutedEventList[dType];
                if (ownerRoutedEventList != null) 
                {
                    return ownerRoutedEventList.ToArray(); 
                } 
            }
            else // Search Hashtable 
            {
                // Get the ItemList of RoutedEvents for the given OwnerType
                FrugalObjectList ownerRoutedEventList = (FrugalObjectList)_ownerTypedRoutedEventList[ownerType];
                if (ownerRoutedEventList != null) 
                {
                    return ownerRoutedEventList.ToArray(); 
                } 
            }
 
            // No match found
            return null;
        }
 
        // Returns a RoutedEvents that match
        // the name and ownerType input params 
        // If not found returns null 
        internal static RoutedEvent GetRoutedEventFromName(
            string name, 
            Type ownerType,
            bool includeSupers)
        {
            if ((ownerType == typeof(DependencyObject)) || ownerType.IsSubclassOf(typeof(DependencyObject))) 
            {
                // Search DTypeMap 
                DependencyObjectType dType = DependencyObjectType.FromSystemTypeInternal(ownerType); 

                while (dType != null) 
                {
                    // Get the ItemList of RoutedEvents for the given DType
                    FrugalObjectList ownerRoutedEventList = (FrugalObjectList)_dTypedRoutedEventList[dType];
                    if (ownerRoutedEventList != null) 
                    {
                        // Check for RoutedEvent with matching name in the ItemList 
                        for (int i=0; i ownerRoutedEventList = (FrugalObjectList)_ownerTypedRoutedEventList[ownerType];
                    if (ownerRoutedEventList != null)
                    {
                        // Check for RoutedEvent with matching name in the ItemList 
                        for (int i=0; i= Int32.MaxValue)
                {
                    throw new InvalidOperationException(SR.Get(SRID.TooManyRoutedEvents)); 
                }
 
                index = _globalIndexToEventMap.Add(value); 
            }
            return index; 
        }

        // Must be called from within a lock of GlobalEventManager.Synchronized
        internal static object EventFromGlobalIndex(int globalIndex) 
        {
            return _globalIndexToEventMap[globalIndex]; 
        } 

        // must be used within a lock of GlobalEventManager.Synchronized 
        private static ArrayList _globalIndexToEventMap = new ArrayList(100); //

        #endregion
 
        #region Data
 
        // This is an efficient  Hashtable of ItemLists keyed on DType 
        // Each ItemList holds the registered RoutedEvents for that OwnerType
        private static DTypeMap _dTypedRoutedEventList = new DTypeMap(10); // Initialization sizes based on typical MSN scenario 

        // This is a Hashtable of ItemLists keyed on OwnerType
        // Each ItemList holds the registered RoutedEvents for that OwnerType
        private static Hashtable _ownerTypedRoutedEventList = new Hashtable(10); // Initialization sizes based on typical MSN scenario 

        // This member keeps a count of the total number of Routed Events registered so far 
        // The member also serves as the internally used ComputedEventIndex that indexes 
        // EventListenersListss that store class handler information for a class type
        private static int _countRoutedEvents = 0; 

        // This is an efficient Hashtable of ItemLists keyed on DType
        // Each ItemList holds the registered RoutedEvent class handlers for that ClassType
        private static DTypeMap _dTypedClassListeners = new DTypeMap(100); // Initialization sizes based on typical Expression Blend startup scenario 

        // This is the cached value for the DType of DependencyObject 
        private static DependencyObjectType _dependencyObjectType = DependencyObjectType.FromSystemTypeInternal(typeof(DependencyObject)); 

        internal static object Synchronized = new object(); 

        #endregion Data
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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