Run.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Documents / Run.cs / 1 / Run.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// Description: Run class - Text node in Flow content (text run) 
//
//--------------------------------------------------------------------------- 
 
using MS.Internal;                  // Invariant.Assert
using System.Windows.Markup; // ContentProperty 

namespace System.Windows.Documents
{
    ///  
    /// A terminal element in text flow hierarchy - contains a uniformatted run of unicode characters
    ///  
    [ContentProperty("Text")] 
    public class Run : Inline
    { 
        //-------------------------------------------------------------------
        //
        // Constructors
        // 
        //-------------------------------------------------------------------
 
        #region Constructors 

        ///  
        /// Initializes an instance of Run class.
        /// 
        public Run()
        { 
        }
 
        ///  
        /// Initializes an instance of Run class specifying its text content.
        ///  
        /// 
        /// Text content assigned to the Run.
        /// 
        public Run(string text) : this(text, null) 
        {
        } 
 
        /// 
        /// Creates a new Run instance. 
        /// 
        /// 
        /// Optional text content.  May be null.
        ///  
        /// 
        /// Optional position at which to insert the new Run. May 
        /// be null. 
        /// 
        public Run(string text, TextPointer insertionPosition) 
        {
            if (insertionPosition != null)
            {
                insertionPosition.TextContainer.BeginChange(); 
            }
            try 
            { 
                if (insertionPosition != null)
                { 
                    // This will throw InvalidOperationException if schema validity is violated.
                    insertionPosition.InsertInline(this);
                }
 
                if (text != null)
                { 
                    // Do not use Text property as it has perf impact on parser. 
                    this.ContentStart.InsertTextInRun(text);
                } 
            }
            finally
            {
                if (insertionPosition != null) 
                {
                    insertionPosition.TextContainer.EndChange(); 
                } 
            }
    } 

        #endregion Constructors

        //-------------------------------------------------------------------- 
        //
        // Public Properties 
        // 
        //-------------------------------------------------------------------
 
        #region Public Properties

        /// 
        /// The content spanned by this TextElement. 
        /// 
        public string Text 
        { 
            get
            { 
                return TextRangeBase.GetTextInternal(this.ContentStart, this.ContentEnd);
            }

            set 
            {
                if (value == null) 
                { 
                    value = String.Empty;
                } 

                TextContainer textContainer = this.TextContainer;

                textContainer.BeginChange(); 
                try
                { 
                    TextPointer contentStart = this.ContentStart; 
                    if (!this.IsEmpty)
                    { 
                        textContainer.DeleteContentInternal(contentStart, this.ContentEnd);
                    }
                    contentStart.InsertTextInRun(value);
                } 
                finally
                { 
                    textContainer.EndChange(); 
                }
            } 
        }

        #endregion Public Properties
 
        //--------------------------------------------------------------------
        // 
        // Internal Methods 
        //
        //-------------------------------------------------------------------- 

        #region Internal Methods

        // 
        //  This property
        //  1. Finds the correct initial size for the _effectiveValues store on the current DependencyObject 
        //  2. This is a performance optimization 
        //
        internal override int EffectiveValuesInitialSize 
        {
            get { return 13; }
        }
 
        /// 
        /// This method is used by TypeDescriptor to determine if this property should 
        /// be serialized. 
        /// 
        [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)] 
        public bool ShouldSerializeText(XamlDesignerSerializationManager manager)
        {
            return manager != null && manager.XmlWriter == null;
        } 

        #endregion Internal Methods 
    } 
}

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

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