TextEditorParagraphs.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Documents / TextEditorParagraphs.cs / 1305600 / TextEditorParagraphs.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// File: TextEditorParagraphs.cs
//
// Copyright (C) Microsoft Corporation.  All rights reserved. 
//
// Description: A component of TextEditor supporting paragraph formating commands 
// 
//---------------------------------------------------------------------------
 
namespace System.Windows.Documents
{
    using MS.Internal;
    using System.Globalization; 
    using System.Threading;
    using System.ComponentModel; 
    using System.Text; 
    using System.Collections; // ArrayList
    using System.Runtime.InteropServices; 

    using System.Windows.Threading;
    using System.Windows.Input;
    using System.Windows.Controls; // ScrollChangedEventArgs 
    using System.Windows.Controls.Primitives;  // CharacterCasing, TextBoxBase
    using System.Windows.Media; 
    using System.Windows.Markup; 

    using MS.Utility; 
    using MS.Win32;
    using MS.Internal.Documents;
    using MS.Internal.Commands; // CommandHelpers
 
    /// 
    /// Text editing service for controls. 
    ///  
    internal static class TextEditorParagraphs
    { 
        //-----------------------------------------------------
        //
        //  Class Internal Methods
        // 
        //-----------------------------------------------------
 
        #region Class Internal Methods 

        // Registers all text editing command handlers for a given control type 
        internal static void _RegisterClassHandlers(Type controlType, bool acceptsRichContent, bool registerEventListeners)
        {
            CanExecuteRoutedEventHandler onQueryStatusNYI = new CanExecuteRoutedEventHandler(OnQueryStatusNYI);
 
            if (acceptsRichContent)
            { 
                // Editing Commands: Paragraph Editing 
                // -----------------------------------
                CommandHelpers.RegisterCommandHandler(controlType, EditingCommands.AlignLeft                 , new ExecutedRoutedEventHandler(OnAlignLeft)                 , onQueryStatusNYI, SRID.KeyAlignLeft,             SRID.KeyAlignLeftDisplayString             ); 
                CommandHelpers.RegisterCommandHandler(controlType, EditingCommands.AlignCenter               , new ExecutedRoutedEventHandler(OnAlignCenter)               , onQueryStatusNYI, SRID.KeyAlignCenter,           SRID.KeyAlignCenterDisplayString           );
                CommandHelpers.RegisterCommandHandler(controlType, EditingCommands.AlignRight                , new ExecutedRoutedEventHandler(OnAlignRight)                , onQueryStatusNYI, SRID.KeyAlignRight,            SRID.KeyAlignRightDisplayString            );
                CommandHelpers.RegisterCommandHandler(controlType, EditingCommands.AlignJustify              , new ExecutedRoutedEventHandler(OnAlignJustify)              , onQueryStatusNYI, SRID.KeyAlignJustify,          SRID.KeyAlignJustifyDisplayString          );
                CommandHelpers.RegisterCommandHandler(controlType, EditingCommands.ApplySingleSpace          , new ExecutedRoutedEventHandler(OnApplySingleSpace)          , onQueryStatusNYI, SRID.KeyApplySingleSpace,      SRID.KeyApplySingleSpaceDisplayString      ); 
                CommandHelpers.RegisterCommandHandler(controlType, EditingCommands.ApplyOneAndAHalfSpace     , new ExecutedRoutedEventHandler(OnApplyOneAndAHalfSpace)     , onQueryStatusNYI, SRID.KeyApplyOneAndAHalfSpace, SRID.KeyApplyOneAndAHalfSpaceDisplayString );
                CommandHelpers.RegisterCommandHandler(controlType, EditingCommands.ApplyDoubleSpace          , new ExecutedRoutedEventHandler(OnApplyDoubleSpace)          , onQueryStatusNYI, SRID.KeyApplyDoubleSpace,      SRID.KeyApplyDoubleSpaceDisplayString      ); 
            } 

            CommandHelpers.RegisterCommandHandler(controlType, EditingCommands.ApplyParagraphFlowDirectionLTR, new ExecutedRoutedEventHandler(OnApplyParagraphFlowDirectionLTR), onQueryStatusNYI); 
            CommandHelpers.RegisterCommandHandler(controlType, EditingCommands.ApplyParagraphFlowDirectionRTL, new ExecutedRoutedEventHandler(OnApplyParagraphFlowDirectionRTL), onQueryStatusNYI);
        }

        #endregion Class Internal Methods 

        //------------------------------------------------------ 
        // 
        //  Private Methods
        // 
        //-----------------------------------------------------

        #region Private Methods
 
        /// 
        /// AlignLeft command event handler. 
        ///  
        private static void OnAlignLeft(object sender, ExecutedRoutedEventArgs e)
        { 
            TextEditor This = TextEditor._GetTextEditor(sender);

            if (This == null)
            { 
                return;
            } 
 
            TextEditorCharacters._OnApplyProperty(This, Block.TextAlignmentProperty, TextAlignment.Left, /*applyToParagraphs*/true);
        } 

        /// 
        /// AlignCenter command event handler.
        ///  
        private static void OnAlignCenter(object sender, ExecutedRoutedEventArgs e)
        { 
            TextEditor This = TextEditor._GetTextEditor(sender); 

            if (This == null) 
            {
                return;
            }
 
            TextEditorCharacters._OnApplyProperty(This, Block.TextAlignmentProperty, TextAlignment.Center, /*applyToParagraphs*/true);
        } 
 
        /// 
        /// AlignRight command event handler. 
        /// 
        private static void OnAlignRight(object sender, ExecutedRoutedEventArgs e)
        {
            TextEditor This = TextEditor._GetTextEditor(sender); 

            if (This == null) 
            { 
                return;
            } 

            TextEditorCharacters._OnApplyProperty(This, Block.TextAlignmentProperty, TextAlignment.Right, /*applyToParagraphs*/true);
        }
 
        /// 
        /// AlignJustify command event handler. 
        ///  
        private static void OnAlignJustify(object sender, ExecutedRoutedEventArgs e)
        { 
            TextEditor This = TextEditor._GetTextEditor(sender);

            if (This == null)
            { 
                return;
            } 
 
            TextEditorCharacters._OnApplyProperty(This, Block.TextAlignmentProperty, TextAlignment.Justify, /*applyToParagraphs*/true);
        } 

        private static void OnApplySingleSpace(object sender, ExecutedRoutedEventArgs e)
        {
            // 
        }
 
        private static void OnApplyOneAndAHalfSpace(object sender, ExecutedRoutedEventArgs e) 
        {
            // 
        }

        private static void OnApplyDoubleSpace(object sender, ExecutedRoutedEventArgs e)
        { 
            //
        } 
 
        /// 
        /// OnApplyParagraphFlowDirectionLTR command event handler. 
        /// 
        private static void OnApplyParagraphFlowDirectionLTR(object sender, ExecutedRoutedEventArgs e)
        {
            TextEditor This = TextEditor._GetTextEditor(sender); 
            TextEditorCharacters._OnApplyProperty(This, FrameworkElement.FlowDirectionProperty,
                FlowDirection.LeftToRight, /*applyToParagraphs*/true); 
        } 

        ///  
        /// OnApplyParagraphFlowDirectionRTL command event handler.
        /// 
        private static void OnApplyParagraphFlowDirectionRTL(object sender, ExecutedRoutedEventArgs e)
        { 
            TextEditor This = TextEditor._GetTextEditor(sender);
            TextEditorCharacters._OnApplyProperty(This, FrameworkElement.FlowDirectionProperty, 
                FlowDirection.RightToLeft, /*applyToParagraphs*/true); 
        }
 
        // ----------------------------------------------------------
        //
        // Misceleneous Commands
        // 
        // ----------------------------------------------------------
 
        #region Misceleneous Commands 

        ///  
        /// StartInputCorrection command QueryStatus handler
        /// 
        private static void OnQueryStatusNYI(object sender, CanExecuteRoutedEventArgs e)
        { 
            TextEditor This = TextEditor._GetTextEditor(sender);
 
            if (This == null) 
            {
                return; 
            }

            e.CanExecute = true;
        } 

        #endregion Misceleneous Commands 
 
        #endregion Private methods
    } 
}

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

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