Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / Annotations / Anchoring / TextViewSelectionProcessor.cs / 1305600 / TextViewSelectionProcessor.cs
//------------------------------------------------------------------------------
//
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//
// Description:
// A SelectionProcessor subclass which produces locator parts that select
// all anchors that intersect with the text in an element's TextView.
//
// History:
// 11/29/2006: rruiz: Created
//-----------------------------------------------------------------------------
using System;
using System.Windows;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Globalization;
using System.Windows.Annotations;
using System.Windows.Annotations.Storage;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Xml;
using MS.Utility;
using System.Windows.Media;
using System.Windows.Controls.Primitives;
using MS.Internal.Documents;
using MS.Internal.PtsHost;
namespace MS.Internal.Annotations.Anchoring
{
///
///
internal class TextViewSelectionProcessor : SelectionProcessor
{
//-----------------------------------------------------
//
// Constructors
//
//-----------------------------------------------------
#region Constructors
///
/// Creates an instance of TextViewSelectionProcessor.
///
public TextViewSelectionProcessor()
{
}
#endregion Constructors
//------------------------------------------------------
//
// Public Methods
//
//-----------------------------------------------------
#region Public Methods
///
/// Not implemented for this selection processor.
///
/// selection to merge
/// other selection to merge
/// always set to null because DocumentPageViews cannot be merged
/// always returns false because DocumentPageViewss cannot be merged
public override bool MergeSelections(Object selection1, Object selection2, out Object newSelection)
{
newSelection = null;
return false;
}
///
/// Simply returns the selection passed in which should be an element.
///
/// the selection to examine
/// a list containing the selection
/// selection is null
/// selection is of wrong type
public override IList GetSelectedNodes(Object selection)
{
// Verify selection is a service provider that provides ITextView
VerifySelection(selection);
return new DependencyObject[] { (DependencyObject)selection };
}
///
/// Simply returns the selection which should be an element.
///
/// the selection to examine
/// the selection itself
/// selection is null
/// selection is of wrong type
public override UIElement GetParent(Object selection)
{
// Verify selection is a service provider that provides ITextView
VerifySelection(selection);
return (UIElement)selection;
}
///
/// Gets the anchor point for the selection. This isn't a runtime selection
/// and therefore shouldn't be anchored to. This processor returns a point of
/// (Double.NaN, Double.NaN).
///
/// the selection to examine
/// selection is null
/// selection is of wrong type
public override Point GetAnchorPoint(Object selection)
{
// Verify selection is a DocumentPageView
VerifySelection(selection);
// Returns the point (Nan,Nan)
return new Point(double.NaN,double.NaN);
}
///
/// Creates one or more locator parts representing the portion
/// of 'startNode' spanned by 'selection'.
///
/// the selection that is being processed
/// the node the locator parts should be in the
/// context of
/// one or more locator parts representing the portion of 'startNode' spanned
/// by 'selection'
/// startNode or selection is null
/// selection is of the wrong type
public override IList
GenerateLocatorParts(Object selection, DependencyObject startNode)
{
if (startNode == null)
throw new ArgumentNullException("startNode");
List res = null;
ITextView textView = VerifySelection(selection);
res = new List(1);
int startOffset;
int endOffset;
if (textView != null && textView.IsValid)
{
GetTextViewTextRange(textView, out startOffset, out endOffset);
}
else
{
// This causes no content to be loaded
startOffset = -1;
endOffset = -1;
}
ContentLocatorPart part = new ContentLocatorPart(TextSelectionProcessor.CharacterRangeElementName);// DocumentPageViewLocatorPart();
part.NameValuePairs.Add(TextSelectionProcessor.CountAttribute, 1.ToString(NumberFormatInfo.InvariantInfo));
part.NameValuePairs.Add(TextSelectionProcessor.SegmentAttribute + 0.ToString(NumberFormatInfo.InvariantInfo), startOffset.ToString(NumberFormatInfo.InvariantInfo) + TextSelectionProcessor.Separator[0] + endOffset.ToString(NumberFormatInfo.InvariantInfo));
part.NameValuePairs.Add(TextSelectionProcessor.IncludeOverlaps, Boolean.TrueString);
res.Add(part);
return res;
}
///
/// This processor doesn't resolve ContentLocatorParts. It simply returns null.
///
/// locator part specifying data to be spanned
/// the node to be spanned by the created
/// selection
/// always set to AttachmentLevel.Unresolved
/// always returns null; this processor does not resolve ContentLocatorParts
/// locatorPart or startNode are null
public override Object ResolveLocatorPart(ContentLocatorPart locatorPart, DependencyObject startNode, out AttachmentLevel attachmentLevel)
{
if (locatorPart == null)
throw new ArgumentNullException("locatorPart");
if (startNode == null)
throw new ArgumentNullException("startNode");
attachmentLevel = AttachmentLevel.Unresolved;
// ContentLocator Parts generated by this selection processor cannot be resolved
return null;
}
///
/// Returns a list of XmlQualifiedNames representing the
/// the locator parts this processor can generate. This processor
/// does not resolve these ContentLocatorParts - only generates them.
///
public override XmlQualifiedName[] GetLocatorPartTypes()
{
return (XmlQualifiedName[])LocatorPartTypeNames.Clone();
}
#endregion Public Methods
//------------------------------------------------------
//
// Public Operators
//
//------------------------------------------------------
//-----------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
//-----------------------------------------------------
//
// Public Events
//
//-----------------------------------------------------
//-----------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
///
/// Returns the TextRange representing the visible contents of the ITextView.
/// Also returns the same information in terms of the offsets to the start and end.
///
/// ITextView to get visible contents of
/// offset into the document representing start of visible content
/// offset into the document representing end of visible content
/// TextRange spanning all visible content
internal static TextRange GetTextViewTextRange(ITextView textView, out int startOffset, out int endOffset)
{
Debug.Assert(textView != null);
// These are the default in case we don't find any content in the DocumentPageView
startOffset = int.MinValue;
endOffset = 0;
TextRange textRange = null;
IList segments = textView.TextSegments;
if (segments != null && segments.Count > 0)
{
ITextPointer start = segments[0].Start;
ITextPointer end = segments[segments.Count - 1].End;
startOffset = end.TextContainer.Start.GetOffsetToPosition(start);
endOffset = end.TextContainer.Start.GetOffsetToPosition(end);
textRange = new TextRange(start, end);
}
return textRange;
}
#endregion Internal Methods
//-----------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
#region Private Methods
///
/// Verify the selection is of the correct type.
///
/// selection to verify
/// the selection cast to the necessary type
private ITextView VerifySelection(object selection)
{
if (selection == null)
throw new ArgumentNullException("selection");
IServiceProvider provider = selection as IServiceProvider;
if (provider == null)
throw new ArgumentException(SR.Get(SRID.SelectionMustBeServiceProvider),"selection");
ITextView textView = provider.GetService(typeof(ITextView)) as ITextView;
return textView;
}
#endregion Private Methods
//------------------------------------------------------
//
// Private Fields
//
//-----------------------------------------------------
#region Private Fields
// ContentLocator part types understood by this processor
private static readonly XmlQualifiedName[] LocatorPartTypeNames = new XmlQualifiedName[0];
#endregion Private Fields
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------
//
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//
// Description:
// A SelectionProcessor subclass which produces locator parts that select
// all anchors that intersect with the text in an element's TextView.
//
// History:
// 11/29/2006: rruiz: Created
//-----------------------------------------------------------------------------
using System;
using System.Windows;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Globalization;
using System.Windows.Annotations;
using System.Windows.Annotations.Storage;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Xml;
using MS.Utility;
using System.Windows.Media;
using System.Windows.Controls.Primitives;
using MS.Internal.Documents;
using MS.Internal.PtsHost;
namespace MS.Internal.Annotations.Anchoring
{
///
///
internal class TextViewSelectionProcessor : SelectionProcessor
{
//-----------------------------------------------------
//
// Constructors
//
//-----------------------------------------------------
#region Constructors
///
/// Creates an instance of TextViewSelectionProcessor.
///
public TextViewSelectionProcessor()
{
}
#endregion Constructors
//------------------------------------------------------
//
// Public Methods
//
//-----------------------------------------------------
#region Public Methods
///
/// Not implemented for this selection processor.
///
/// selection to merge
/// other selection to merge
/// always set to null because DocumentPageViews cannot be merged
/// always returns false because DocumentPageViewss cannot be merged
public override bool MergeSelections(Object selection1, Object selection2, out Object newSelection)
{
newSelection = null;
return false;
}
///
/// Simply returns the selection passed in which should be an element.
///
/// the selection to examine
/// a list containing the selection
/// selection is null
/// selection is of wrong type
public override IList GetSelectedNodes(Object selection)
{
// Verify selection is a service provider that provides ITextView
VerifySelection(selection);
return new DependencyObject[] { (DependencyObject)selection };
}
///
/// Simply returns the selection which should be an element.
///
/// the selection to examine
/// the selection itself
/// selection is null
/// selection is of wrong type
public override UIElement GetParent(Object selection)
{
// Verify selection is a service provider that provides ITextView
VerifySelection(selection);
return (UIElement)selection;
}
///
/// Gets the anchor point for the selection. This isn't a runtime selection
/// and therefore shouldn't be anchored to. This processor returns a point of
/// (Double.NaN, Double.NaN).
///
/// the selection to examine
/// selection is null
/// selection is of wrong type
public override Point GetAnchorPoint(Object selection)
{
// Verify selection is a DocumentPageView
VerifySelection(selection);
// Returns the point (Nan,Nan)
return new Point(double.NaN,double.NaN);
}
///
/// Creates one or more locator parts representing the portion
/// of 'startNode' spanned by 'selection'.
///
/// the selection that is being processed
/// the node the locator parts should be in the
/// context of
/// one or more locator parts representing the portion of 'startNode' spanned
/// by 'selection'
/// startNode or selection is null
/// selection is of the wrong type
public override IList
GenerateLocatorParts(Object selection, DependencyObject startNode)
{
if (startNode == null)
throw new ArgumentNullException("startNode");
List res = null;
ITextView textView = VerifySelection(selection);
res = new List(1);
int startOffset;
int endOffset;
if (textView != null && textView.IsValid)
{
GetTextViewTextRange(textView, out startOffset, out endOffset);
}
else
{
// This causes no content to be loaded
startOffset = -1;
endOffset = -1;
}
ContentLocatorPart part = new ContentLocatorPart(TextSelectionProcessor.CharacterRangeElementName);// DocumentPageViewLocatorPart();
part.NameValuePairs.Add(TextSelectionProcessor.CountAttribute, 1.ToString(NumberFormatInfo.InvariantInfo));
part.NameValuePairs.Add(TextSelectionProcessor.SegmentAttribute + 0.ToString(NumberFormatInfo.InvariantInfo), startOffset.ToString(NumberFormatInfo.InvariantInfo) + TextSelectionProcessor.Separator[0] + endOffset.ToString(NumberFormatInfo.InvariantInfo));
part.NameValuePairs.Add(TextSelectionProcessor.IncludeOverlaps, Boolean.TrueString);
res.Add(part);
return res;
}
///
/// This processor doesn't resolve ContentLocatorParts. It simply returns null.
///
/// locator part specifying data to be spanned
/// the node to be spanned by the created
/// selection
/// always set to AttachmentLevel.Unresolved
/// always returns null; this processor does not resolve ContentLocatorParts
/// locatorPart or startNode are null
public override Object ResolveLocatorPart(ContentLocatorPart locatorPart, DependencyObject startNode, out AttachmentLevel attachmentLevel)
{
if (locatorPart == null)
throw new ArgumentNullException("locatorPart");
if (startNode == null)
throw new ArgumentNullException("startNode");
attachmentLevel = AttachmentLevel.Unresolved;
// ContentLocator Parts generated by this selection processor cannot be resolved
return null;
}
///
/// Returns a list of XmlQualifiedNames representing the
/// the locator parts this processor can generate. This processor
/// does not resolve these ContentLocatorParts - only generates them.
///
public override XmlQualifiedName[] GetLocatorPartTypes()
{
return (XmlQualifiedName[])LocatorPartTypeNames.Clone();
}
#endregion Public Methods
//------------------------------------------------------
//
// Public Operators
//
//------------------------------------------------------
//-----------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
//-----------------------------------------------------
//
// Public Events
//
//-----------------------------------------------------
//-----------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
///
/// Returns the TextRange representing the visible contents of the ITextView.
/// Also returns the same information in terms of the offsets to the start and end.
///
/// ITextView to get visible contents of
/// offset into the document representing start of visible content
/// offset into the document representing end of visible content
/// TextRange spanning all visible content
internal static TextRange GetTextViewTextRange(ITextView textView, out int startOffset, out int endOffset)
{
Debug.Assert(textView != null);
// These are the default in case we don't find any content in the DocumentPageView
startOffset = int.MinValue;
endOffset = 0;
TextRange textRange = null;
IList segments = textView.TextSegments;
if (segments != null && segments.Count > 0)
{
ITextPointer start = segments[0].Start;
ITextPointer end = segments[segments.Count - 1].End;
startOffset = end.TextContainer.Start.GetOffsetToPosition(start);
endOffset = end.TextContainer.Start.GetOffsetToPosition(end);
textRange = new TextRange(start, end);
}
return textRange;
}
#endregion Internal Methods
//-----------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
#region Private Methods
///
/// Verify the selection is of the correct type.
///
/// selection to verify
/// the selection cast to the necessary type
private ITextView VerifySelection(object selection)
{
if (selection == null)
throw new ArgumentNullException("selection");
IServiceProvider provider = selection as IServiceProvider;
if (provider == null)
throw new ArgumentException(SR.Get(SRID.SelectionMustBeServiceProvider),"selection");
ITextView textView = provider.GetService(typeof(ITextView)) as ITextView;
return textView;
}
#endregion Private Methods
//------------------------------------------------------
//
// Private Fields
//
//-----------------------------------------------------
#region Private Fields
// ContentLocator part types understood by this processor
private static readonly XmlQualifiedName[] LocatorPartTypeNames = new XmlQualifiedName[0];
#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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