InputBindingCollection.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Input / Command / InputBindingCollection.cs / 1305600 / InputBindingCollection.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: InputBindingCollection serves the purpose of Storing/Retrieving InputBindings 
//
//              See spec at : http://avalon/coreui/Specs/Commanding(new).mht 
//
//
// History:
//      04/02/2004 : chandras - Created 
//
//--------------------------------------------------------------------------- 
using System; 
using System.Collections;
using System.Collections.Generic; 
using System.Diagnostics;
using System.Collections.Specialized;
using System.Windows;
using System.Windows.Input; 

using MS.Internal; 
 
using SR=MS.Internal.PresentationCore.SR;
using SRID=MS.Internal.PresentationCore.SRID; 

namespace System.Windows.Input
{
    ///  
    /// InputBindingCollection - Collection of InputBindings.
    ///     Stores the InputBindings Sequentially in an System.Collections.Generic.List"InputBinding"a. 
    ///     Will be changed to generic List implementation once the 
    ///     parser supports generic collections.
    ///  
    public sealed class InputBindingCollection : IList
    {
        //-----------------------------------------------------
        // 
        //  Constructors
        // 
        //----------------------------------------------------- 
        #region Constructors
        ///  
        /// Constructor
        /// 
        public InputBindingCollection()
        { 
        }
 
        ///  
        /// InputBindingCollection
        ///  
        /// InputBinding array
        public InputBindingCollection(IList inputBindings)
        {
            if (inputBindings != null && inputBindings.Count > 0) 
            {
                this.AddRange(inputBindings as ICollection); 
            } 
        }
 
        /// 
        ///     Internal Constructor
        /// 
        internal InputBindingCollection(DependencyObject owner) 
        {
            _owner = owner; 
        } 

        #endregion Constructors 

        //------------------------------------------------------
        //
        //  Public Methods 
        //
        //----------------------------------------------------- 
 
        #region Public Methods
 
#region Implementation of IList

#region Implementation of ICollection
        ///  
        /// CopyTo - to copy the entire collection into an array
        ///  
        /// generic object array 
        /// 
        void ICollection.CopyTo(System.Array array, int index) 
        {
            if (_innerBindingList != null)
            {
                ((ICollection)_innerBindingList).CopyTo(array, index); 
            }
        } 
#endregion Implementation of ICollection 

        ///  
        /// IList.Contains
        /// 
        /// key
        /// true - if found, false - otherwise 
        bool IList.Contains(object key)
        { 
            return this.Contains(key as InputBinding); 
        }
 
        /// 
        /// IndexOf - returns the index of the item in the list
        /// 
        /// item whose index is sought 
        /// index of the item or -1 
        int IList.IndexOf(object value) 
        { 
            InputBinding inputBinding = value as InputBinding;
            return ((inputBinding != null) ? this.IndexOf(inputBinding) : -1); 
        }

        /// 
        ///  Insert 
        /// 
        ///  
        ///  
        void IList.Insert(int index, object value)
        { 
            this.Insert(index, value as InputBinding);
        }

        ///  
        /// Add - appends the given inputbinding to the current list.
        ///  
        /// InputBinding object to add 
        int IList.Add(object inputBinding)
        { 
            this.Add(inputBinding as InputBinding);
            return 0; // ICollection.Add no longer returns the indice
        }
 
        /// 
        /// Remove - removes the given inputbinding from the current list. 
        ///  
        /// InputBinding object to remove
        void IList.Remove(object inputBinding) 
        {
            this.Remove(inputBinding as InputBinding);
        }
 
        /// 
        /// Indexing operator 
        ///  
        object IList.this[int index]
        { 
            get
            {
                return this[index];
            } 
            set
            { 
                InputBinding inputBinding = value as InputBinding; 
                if (inputBinding == null)
                   throw new NotSupportedException(SR.Get(SRID.CollectionOnlyAcceptsInputBindings)); 

                this[index] = inputBinding;
            }
        } 

#endregion Implementation of IList 
        ///  
        /// Indexing operator
        ///  
        public InputBinding this[int index]
        {
            get
            { 
                // disable PreSharp warning about throwing exceptions in getter;
                // this is allowed in an indexed property.  (First disable C# 
                // warning about unknown warning numbers.) 
                #pragma warning disable 1634, 1691
                #pragma warning disable 6503 

                if (_innerBindingList != null)
                {
                    return _innerBindingList[index]; 
                }
                else 
                { 
                    throw new ArgumentOutOfRangeException("index");
                } 

                #pragma warning restore 6503
                #pragma warning restore 1634, 1691
            } 
            set
            { 
                if (_innerBindingList != null) 
                {
                    InputBinding oldInputBinding = null; 
                    if (index >= 0 && index < _innerBindingList.Count)
                    {
                        oldInputBinding = _innerBindingList[index];
                    } 
                    _innerBindingList[index] = value;
                    if (oldInputBinding != null) 
                    { 
                        InheritanceContextHelper.RemoveContextFromObject(_owner, oldInputBinding);
                    } 
                    InheritanceContextHelper.ProvideContextForObject(_owner, value);
                }
                else
                { 
                    throw new ArgumentOutOfRangeException("index");
                } 
            } 
        }
 
        /// 
        /// Add
        /// 
        ///  
        public int Add(InputBinding inputBinding)
        { 
            if (inputBinding != null) 
            {
                if (_innerBindingList == null) 
                    _innerBindingList = new System.Collections.Generic.List(1);

                _innerBindingList.Add(inputBinding);
                InheritanceContextHelper.ProvideContextForObject(_owner, inputBinding); 
                return 0; // ICollection.Add no longer returns the indice
            } 
            else 
            {
                throw new NotSupportedException(SR.Get(SRID.CollectionOnlyAcceptsInputBindings)); 
            }
        }

        ///  
        /// ICollection.IsSynchronized
        ///  
        public bool IsSynchronized 
        {
            get 
            {
                if (_innerBindingList != null)
                    return ((IList)_innerBindingList).IsSynchronized;
 
                return false;
            } 
        } 

        ///  
        /// IndexOf
        /// 
        /// 
        ///  
        public int IndexOf(InputBinding value)
        { 
            return (_innerBindingList != null) ? _innerBindingList.IndexOf(value) : -1; 
        }
 
        /// 
        /// Adds the elements of the given collection to the end of this list. If
        /// required, the capacity of the list is increased to twice the previous
        /// capacity or the new size, whichever is larger. 
        /// 
        /// collection to append 
        public void AddRange(ICollection collection) 
        {
            if (collection == null) 
            {
                throw new ArgumentNullException("collection");
            }
 
            if ( collection.Count > 0)
            { 
                if (_innerBindingList == null) 
                    _innerBindingList = new System.Collections.Generic.List(collection.Count);
 
                IEnumerator collectionEnum = collection.GetEnumerator();
                while(collectionEnum.MoveNext())
                {
                    InputBinding inputBinding = collectionEnum.Current as InputBinding; 
                    if (inputBinding != null)
                    { 
                        _innerBindingList.Add(inputBinding); 
                        InheritanceContextHelper.ProvideContextForObject(_owner, inputBinding);
                    } 
                    else
                    {
                        throw new NotSupportedException(SR.Get(SRID.CollectionOnlyAcceptsInputBindings));
                    } 
                }
            } 
        } 

        ///  
        ///  Insert at given index
        /// 
        /// index at which to insert the given item
        /// inputBinding to insert 
        public void Insert(int index, InputBinding inputBinding)
        { 
            if (inputBinding == null) 
            {
                throw new NotSupportedException(SR.Get(SRID.CollectionOnlyAcceptsInputBindings)); 
            }

            if (_innerBindingList != null)
            { 
                _innerBindingList.Insert(index, inputBinding);
                InheritanceContextHelper.ProvideContextForObject(_owner, inputBinding); 
            } 
        }
 
        /// 
        /// Remove
        /// 
        ///  
        public void Remove(InputBinding inputBinding)
        { 
            if (_innerBindingList != null && inputBinding != null) 
            {
                if (_innerBindingList.Remove(inputBinding as InputBinding)) 
                {
                    InheritanceContextHelper.RemoveContextFromObject(_owner, inputBinding);
                }
            } 
        }
 
        ///  
        /// RemoveAt
        ///  
        /// index at which the item needs to be removed
        public void RemoveAt(int index)
        {
            if (_innerBindingList != null) 
            {
                InputBinding oldInputBinding = null; 
                if (index >= 0 && index < _innerBindingList.Count) 
                {
                    oldInputBinding = _innerBindingList[index]; 
                }
                _innerBindingList.RemoveAt(index);
                if (oldInputBinding != null)
                { 
                    InheritanceContextHelper.RemoveContextFromObject(_owner, oldInputBinding);
                } 
            } 
        }
 
        /// 
        /// IsFixedSize - if readonly - fixed, else false.
        /// 
        public bool IsFixedSize 
        {
            get { return IsReadOnly; } 
        } 

        ///  
        /// Count
        /// 
        public int Count
        { 
            get
            { 
                return (_innerBindingList != null ? _innerBindingList.Count : 0); 
            }
        } 

        /// 
        /// ICollection.SyncRoot
        ///  
        public object SyncRoot
        { 
            get 
            {
                return this; 
            }
        }

        ///  
        /// Clears the Entire InputBindingCollection
        ///  
        public void Clear() 
        {
            if (_innerBindingList != null) 
            {
                List oldInputBindings = new List(_innerBindingList);
                _innerBindingList.Clear();
                _innerBindingList = null; 
                foreach (InputBinding inputBinding in oldInputBindings)
                { 
                    InheritanceContextHelper.RemoveContextFromObject(_owner, inputBinding); 
                }
            } 
        }

#region Implementation of Enumerable
        ///  
        /// IEnumerable.GetEnumerator - For Enumeration purposes
        ///  
        ///  
        public IEnumerator GetEnumerator()
        { 
            if (_innerBindingList != null)
                return _innerBindingList.GetEnumerator();

            System.Collections.Generic.List list = new System.Collections.Generic.List(0); 
            return list.GetEnumerator();
        } 
#endregion Implementation of IEnumberable 

        ///  
        /// IList.IsReadOnly - Tells whether this is readonly Collection.
        /// 
        public bool IsReadOnly
        { 
            get { return _isReadOnly; }
        } 
 
        /// 
        /// Contains 
        /// 
        /// key
        /// true - if found, false - otherwise
        public bool Contains(InputBinding key) 
        {
            if (_innerBindingList != null && key != null) 
            { 
                return _innerBindingList.Contains(key);
            } 

            return false;
        }
 
        /// 
        /// CopyTo - to copy the entire collection into an array 
        ///  
        /// type-safe InputBinding array
        /// start index in the current list to copy 
        public void CopyTo(InputBinding[] inputBindings, int index)
        {
            if (_innerBindingList != null)
            { 
                _innerBindingList.CopyTo(inputBindings, index);
            } 
        } 
#endregion Public
 
#region internal

        internal InputBinding FindMatch(object targetElement, InputEventArgs inputEventArgs)
        { 
            for (int i = Count - 1; i >= 0; i--)
            { 
                InputBinding inputBinding = this[i]; 
                if ((inputBinding.Command != null) && (inputBinding.Gesture != null) &&
                    inputBinding.Gesture.Matches(targetElement, inputEventArgs)) 
                {
                    return inputBinding;
                }
            } 

            return null; 
        } 

#endregion internal 
        //------------------------------------------------------
        //
        //  Protected Methods
        // 
        //------------------------------------------------------
        //----------------------------------------------------- 
        // 
        //  Private Methods
        // 
        //------------------------------------------------------
        //-----------------------------------------------------
        //
        //  Private Fields 
        //
        //----------------------------------------------------- 
#region Private Fields 
        private List _innerBindingList;
        private bool  _isReadOnly = false; 
        private DependencyObject _owner = null;
#endregion Private Fields
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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InputBindingCollection.cs source code in C# .NET

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