EditingScope.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 / Tools / System.Activities.Presentation / System / Activities / Presentation / Model / EditingScope.cs / 1305376 / EditingScope.cs
                        

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

namespace System.Activities.Presentation.Model 
{
    using System; 
    using System.Collections.Generic; 
    using System.Text;
    using System.Runtime; 

    [Fx.Tag.XamlVisible(false)]
    public class EditingScope : ModelEditingScope
    { 
        ModelTreeManager modelTreeManager;
        EditingScope outerScope; 
        List changes; 
        List appliedChanges;
        bool suppressUndo; 

        internal EditingScope(ModelTreeManager modelTreeManager, EditingScope outerScope)
        {
            this.modelTreeManager = modelTreeManager; 
            this.changes = new List();
            this.outerScope = outerScope; 
            this.HasModelChanges = false; 
        }
 
        private EditingScope()
        {
        }
 
        public bool HasEffectiveChanges
        { 
            get 
            {
                return this.appliedChanges != null && this.appliedChanges.Count > 0; 
            }
        }

        internal bool HasModelChanges 
        {
            get; 
            private set; 
        }
 
        internal bool SuppressUndo
        {
            get
            { 
                return this.suppressUndo;
            } 
            set 
            {
                Fx.Assert(!value || this.outerScope == null, "If we are suppressing undo, then we are not nested within another editingScope, otherwise suppress undo won't work."); 
                this.suppressUndo = value;
            }
        }
 
        public List Changes
        { 
            get 
            {
                return changes; 
            }
        }

        protected override void OnComplete() 
        {
            if (this.outerScope == null) 
            { 
                appliedChanges = new List();
                int startIndex = 0; 
                // pump all changes, applying changes can add more changes to the end of the change list.
                while (startIndex < this.Changes.Count)
                {
                    // pickup the new changes 
                    List changesToApply = this.Changes.GetRange(startIndex, this.Changes.Count - startIndex);
                    startIndex = this.Changes.Count; 
 
                    foreach (Change change in changesToApply)
                    { 
                        if (change != null && change.Apply())
                        {
                            appliedChanges.Add(change);
                        } 
                        if (change is ModelChange)
                        { 
                            this.HasModelChanges = true; 
                        }
                    } 
                }
            }
            else
            { 
                outerScope.Changes.AddRange(this.Changes);
            } 
            this.modelTreeManager.OnEditingScopeCompleted(this); 
        }
 
        protected override bool CanComplete()
        {
            return this.modelTreeManager.CanEditingScopeComplete(this);
        } 

        protected override void OnRevert(bool finalizing) 
        { 
            if (this.appliedChanges != null)
            { 
                List revertChanges = new List();
                foreach (Change change in this.appliedChanges)
                {
                    revertChanges.Add(change.GetInverse()); 
                }
                revertChanges.Reverse(); 
                foreach (Change change in revertChanges) 
                {
                    change.Apply(); 
                    this.appliedChanges.RemoveAt(this.appliedChanges.Count - 1);
                }
            }
            this.modelTreeManager.OnEditingScopeReverted(this); 
        }
 
        protected override bool OnException(Exception e) 
        {
            return false; 
        }
    }
}

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

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