FlowDocumentReaderAutomationPeer.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Automation / Peers / FlowDocumentReaderAutomationPeer.cs / 1305600 / FlowDocumentReaderAutomationPeer.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// File: FlowDocumentReaderAutomationPeer.cs 
//
// Description: AutomationPeer associated with FlowDocumentReader. 
// 
//---------------------------------------------------------------------------
 
using System.Collections.Generic;           // List
using System.Windows.Automation.Provider;   // IMultipleViewProvider
using System.Windows.Controls;              // FlowDocumentReader
using System.Windows.Documents;             // FlowDocument 
using MS.Internal;                          // Invariant
 
namespace System.Windows.Automation.Peers 
{
    ///  
    /// AutomationPeer associated with FlowDocumentScrollViewer.
    /// 
    public class FlowDocumentReaderAutomationPeer : FrameworkElementAutomationPeer, IMultipleViewProvider
    { 
        /// 
        /// Constructor. 
        ///  
        /// Owner of the AutomationPeer.
        public FlowDocumentReaderAutomationPeer(FlowDocumentReader owner) 
            : base(owner)
        { }

        ///  
        /// 
        ///  
        public override object GetPattern(PatternInterface patternInterface) 
        {
            object returnValue = null; 
            if (patternInterface == PatternInterface.MultipleView)
            {
                returnValue = this;
            } 
            else
            { 
                returnValue = base.GetPattern(patternInterface); 
            }
            return returnValue; 
        }

        /// 
        ///  
        /// 
        ///  
        /// AutomationPeer associated with FlowDocumentScrollViewer returns an AutomationPeer 
        /// for hosted Document and for elements in the style.
        ///  
        protected override List GetChildrenCore()
        {
            // Get children for all elements in the style.
            List children = base.GetChildrenCore(); 

            // Add AutomationPeer associated with the document. 
            // Make it the first child of the collection. 
            FlowDocument document = ((FlowDocumentReader)Owner).Document;
            if (document != null) 
            {
                AutomationPeer documentPeer = ContentElementAutomationPeer.CreatePeerForElement(document);
                if (_documentPeer != documentPeer)
                { 
                    if (_documentPeer != null)
                    { 
                        _documentPeer.OnDisconnected(); 
                    }
                    _documentPeer = documentPeer as DocumentAutomationPeer; 
                }
                if (documentPeer != null)
                {
                    if (children == null) 
                    {
                        children = new List(); 
                    } 
                    children.Add(documentPeer);
                } 
            }

            return children;
        } 

        ///  
        ///  
        /// 
        protected override string GetClassNameCore() 
        {
            return "FlowDocumentReader";
        }
 
        /// 
        /// This helper synchronously fires automation PropertyChange event 
        /// in responce to current view mode change. 
        /// 
        // 
        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)]
        internal void RaiseCurrentViewChangedEvent(FlowDocumentReaderViewingMode newMode, FlowDocumentReaderViewingMode oldMode)
        {
            if (newMode != oldMode) 
            {
                RaisePropertyChangedEvent(MultipleViewPatternIdentifiers.CurrentViewProperty, 
                    ConvertModeToViewId(newMode), ConvertModeToViewId(oldMode)); 
            }
        } 

        /// 
        /// This helper synchronously fires automation PropertyChange event
        /// in responce to supported views change. 
        /// 
        // 
        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)] 
        internal void RaiseSupportedViewsChangedEvent(DependencyPropertyChangedEventArgs e)
        { 
            bool newSingle, oldSingle, newFacing, oldFacing, newScroll, oldScroll;
            if (e.Property == FlowDocumentReader.IsPageViewEnabledProperty)
            {
                newSingle = (bool)e.NewValue; 
                oldSingle = (bool)e.OldValue;
                newFacing = oldFacing = FlowDocumentReader.IsTwoPageViewEnabled; 
                newScroll = oldScroll = FlowDocumentReader.IsScrollViewEnabled; 
            }
            else if (e.Property == FlowDocumentReader.IsTwoPageViewEnabledProperty) 
            {
                newSingle = oldSingle = FlowDocumentReader.IsPageViewEnabled;
                newFacing = (bool)e.NewValue;
                oldFacing = (bool)e.OldValue; 
                newScroll = oldScroll = FlowDocumentReader.IsScrollViewEnabled;
            } 
            else// if (e.Property == FlowDocumentReader.IsScrollViewEnabledProperty) 
            {
                newSingle = oldSingle = FlowDocumentReader.IsPageViewEnabled; 
                newFacing = oldFacing = FlowDocumentReader.IsTwoPageViewEnabled;
                newScroll = (bool)e.NewValue;
                oldScroll = (bool)e.OldValue;
            } 
            if (newSingle != oldSingle || newFacing != oldFacing || newScroll != oldScroll)
            { 
                int[] newViews = GetSupportedViews(newSingle, newFacing, newScroll); 
                int[] oldViews = GetSupportedViews(oldSingle, oldFacing, oldScroll);
                RaisePropertyChangedEvent(MultipleViewPatternIdentifiers.SupportedViewsProperty, newViews, oldViews); 
            }
        }

        //------------------------------------------------------------------- 
        //
        //  Private Members 
        // 
        //-------------------------------------------------------------------
 
        #region Private Members

        private int[] GetSupportedViews(bool single, bool facing, bool scroll)
        { 
            int count = 0;
            if (single) { count++; } 
            if (facing) { count++; } 
            if (scroll) { count++; }
            int[] views = count > 0 ? new int[count] : null; 
            count = 0;
            if (single) { views[count++] = ConvertModeToViewId(FlowDocumentReaderViewingMode.Page); }
            if (facing) { views[count++] = ConvertModeToViewId(FlowDocumentReaderViewingMode.TwoPage); }
            if (scroll) { views[count++] = ConvertModeToViewId(FlowDocumentReaderViewingMode.Scroll); } 
            return views;
        } 
 
        /// 
        /// Converts viewing mode to view id. 
        /// 
        private int ConvertModeToViewId(FlowDocumentReaderViewingMode mode)
        {
            return (int)mode; 
        }
 
        ///  
        /// Converts view id to viewing mode.
        ///  
        private FlowDocumentReaderViewingMode ConvertViewIdToMode(int viewId)
        {
            Invariant.Assert(viewId >= 0 && viewId <= 2);
            return (FlowDocumentReaderViewingMode)viewId; 
        }
 
        ///  
        /// FlowDocumentReader associated with the peer.
        ///  
        private FlowDocumentReader FlowDocumentReader
        {
            get { return (FlowDocumentReader)Owner; }
        } 

        private DocumentAutomationPeer _documentPeer; 
 
        #endregion Private Members
 
        //--------------------------------------------------------------------
        //
        //  IMultipleViewProvider Members
        // 
        //-------------------------------------------------------------------
 
        #region IMultipleViewProvider Members 

        ///  
        /// 
        /// 
        string IMultipleViewProvider.GetViewName(int viewId)
        { 
            string name = string.Empty;
            if (viewId >= 0 && viewId <= 2) 
            { 
                FlowDocumentReaderViewingMode mode = ConvertViewIdToMode(viewId);
                if (mode == FlowDocumentReaderViewingMode.Page) 
                {
                    name = SR.Get(SRID.FlowDocumentReader_MultipleViewProvider_PageViewName);
                }
                else if (mode == FlowDocumentReaderViewingMode.TwoPage) 
                {
                    name = SR.Get(SRID.FlowDocumentReader_MultipleViewProvider_TwoPageViewName); 
                } 
                else if (mode == FlowDocumentReaderViewingMode.Scroll)
                { 
                    name = SR.Get(SRID.FlowDocumentReader_MultipleViewProvider_ScrollViewName);
                }
            }
            return name; 
        }
 
        ///  
        /// 
        ///  
        void IMultipleViewProvider.SetCurrentView(int viewId)
        {
            if (viewId >= 0 && viewId <= 2)
            { 
                FlowDocumentReader.ViewingMode = ConvertViewIdToMode(viewId);
            } 
        } 

        ///  
        /// 
        /// 
        int IMultipleViewProvider.CurrentView
        { 
            get {  return ConvertModeToViewId(FlowDocumentReader.ViewingMode); }
        } 
 
        /// 
        ///  
        /// 
        int[] IMultipleViewProvider.GetSupportedViews()
        {
            return GetSupportedViews( 
                FlowDocumentReader.IsPageViewEnabled,
                FlowDocumentReader.IsTwoPageViewEnabled, 
                FlowDocumentReader.IsScrollViewEnabled); 
        }
 
        #endregion IMultipleViewProvider Members
    }
}

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

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