/// <summary>
/// Creates a selection object spanning the portion of 'startNode'
/// specified by 'locatorPart'.
/// </summary>
/// <param name="locatorPart">locator part specifying data to be spanned</param>
/// <param name="startNode">the node to be spanned by the created
/// selection</param>
/// <param name="attachmentLevel">set to AttachmentLevel.Full if the entire range of text
/// was resolved, otherwise set to StartPortion, MiddlePortion, or EndPortion based on
/// which part of the range was resolved</param>
/// <returns>a selection spanning the portion of 'startNode' specified by
/// 'locatorPart', null if selection described by locator part could not be
/// recreated</returns>
/// <exception cref="ArgumentNullException">locatorPart or startNode are
/// null</exception>
/// <exception cref="ArgumentException">locatorPart is of the incorrect type</exception>
public override Object ResolveLocatorPart(ContentLocatorPart locatorPart, DependencyObject startNode, out AttachmentLevel attachmentLevel)
{
if (startNode == null)
{
throw new ArgumentNullException("startNode");
}
if (locatorPart == null)
{
throw new ArgumentNullException("locatorPart");
}
if (CharacterRangeElementName != locatorPart.PartType)
{
throw new ArgumentException(SR.Get(SRID.IncorrectLocatorPartType, locatorPart.PartType.Namespace + ":" + locatorPart.PartType.Name), "locatorPart");
}
// First we extract the offset and length of the
// text range from the locator part.
int startOffset = 0;
int endOffset = 0;
string stringCount = locatorPart.NameValuePairs[CountAttribute];
if (stringCount == null)
{
throw new ArgumentException(SR.Get(SRID.InvalidLocatorPart, TextSelectionProcessor.CountAttribute));
}
int count = Int32.Parse(stringCount, NumberFormatInfo.InvariantInfo);
TextAnchor anchor = new TextAnchor();
attachmentLevel = AttachmentLevel.Unresolved;
for (int i = 0; i < count; i++)
{
GetLocatorPartSegmentValues(locatorPart, i, out startOffset, out endOffset);
// Now we grab the TextRange so we can create a selection.
// TextBox doesn't expose its internal TextRange so we use
// its API for creating and getting the selection.
ITextPointer elementStart;
ITextPointer elementEnd;
// If we can't get the start/end of the node then we can't resolve the locator part
if (!GetNodesStartAndEnd(startNode, out elementStart, out elementEnd))
{
return(null);
}
// If the offset is not withing the element's text range we return null
int textRangeLength = elementStart.GetOffsetToPosition(elementEnd);
if (startOffset > textRangeLength)
{
return(null);
}
ITextPointer start = elementStart.CreatePointer(startOffset);// new TextPointer((TextPointer)elementStart, startOffset);
ITextPointer end = (textRangeLength <= endOffset) ?
elementEnd.CreatePointer() : //new TextPointer((TextPointer)elementEnd) :
elementStart.CreatePointer(endOffset); // new TextPointer((TextPointer)elementStart, endOffset);
//we do not process 0 length selection
if (start.CompareTo(end) >= 0)
{
return(null);
}
anchor.AddTextSegment(start, end);
}
//we do not support 0 or negative length selection
if (anchor.IsEmpty)
{
throw new ArgumentException(SR.Get(SRID.IncorrectAnchorLength), "locatorPart");
}
attachmentLevel = AttachmentLevel.Full;
if (_clamping)
{
ITextPointer currentStart = anchor.Start;
ITextPointer currentEnd = anchor.End;
IServiceProvider serviceProvider = null;
ITextView textView = null;
if (_targetPage != null)
{
serviceProvider = _targetPage as IServiceProvider;
}
else
{
FlowDocument content = currentStart.TextContainer.Parent as FlowDocument;
serviceProvider = PathNode.GetParent(content as DependencyObject) as IServiceProvider;
}
Invariant.Assert(serviceProvider != null, "No ServiceProvider found to get TextView from.");
textView = serviceProvider.GetService(typeof(ITextView)) as ITextView;
Invariant.Assert(textView != null, "Null TextView provided by ServiceProvider.");
anchor = TextAnchor.TrimToIntersectionWith(anchor, textView.TextSegments);
if (anchor == null)
{
attachmentLevel = AttachmentLevel.Unresolved;
}
else
{
if (anchor.Start.CompareTo(currentStart) != 0)
{
attachmentLevel &= ~AttachmentLevel.StartPortion;
}
if (anchor.End.CompareTo(currentEnd) != 0)
{
attachmentLevel &= ~AttachmentLevel.EndPortion;
}
}
}
return(anchor);
}
// Token: 0x06007C46 RID: 31814 RVA: 0x0022F3A8 File Offset: 0x0022D5A8
public override object ResolveLocatorPart(ContentLocatorPart locatorPart, DependencyObject startNode, out AttachmentLevel attachmentLevel)
{
if (startNode == null)
{
throw new ArgumentNullException("startNode");
}
if (locatorPart == null)
{
throw new ArgumentNullException("locatorPart");
}
if (TextSelectionProcessor.CharacterRangeElementName != locatorPart.PartType)
{
throw new ArgumentException(SR.Get("IncorrectLocatorPartType", new object[]
{
locatorPart.PartType.Namespace + ":" + locatorPart.PartType.Name
}), "locatorPart");
}
int num = 0;
int num2 = 0;
string text = locatorPart.NameValuePairs["Count"];
if (text == null)
{
throw new ArgumentException(SR.Get("InvalidLocatorPart", new object[]
{
"Count"
}));
}
int num3 = int.Parse(text, NumberFormatInfo.InvariantInfo);
TextAnchor textAnchor = new TextAnchor();
attachmentLevel = AttachmentLevel.Unresolved;
for (int i = 0; i < num3; i++)
{
TextSelectionProcessor.GetLocatorPartSegmentValues(locatorPart, i, out num, out num2);
ITextPointer textPointer;
ITextPointer textPointer2;
if (!this.GetNodesStartAndEnd(startNode, out textPointer, out textPointer2))
{
return(null);
}
int offsetToPosition = textPointer.GetOffsetToPosition(textPointer2);
if (num > offsetToPosition)
{
return(null);
}
ITextPointer textPointer3 = textPointer.CreatePointer(num);
ITextPointer textPointer4 = (offsetToPosition <= num2) ? textPointer2.CreatePointer() : textPointer.CreatePointer(num2);
if (textPointer3.CompareTo(textPointer4) >= 0)
{
return(null);
}
textAnchor.AddTextSegment(textPointer3, textPointer4);
}
if (textAnchor.IsEmpty)
{
throw new ArgumentException(SR.Get("IncorrectAnchorLength"), "locatorPart");
}
attachmentLevel = AttachmentLevel.Full;
if (this._clamping)
{
ITextPointer start = textAnchor.Start;
ITextPointer end = textAnchor.End;
IServiceProvider serviceProvider;
if (this._targetPage != null)
{
serviceProvider = this._targetPage;
}
else
{
FlowDocument node = start.TextContainer.Parent as FlowDocument;
serviceProvider = (PathNode.GetParent(node) as IServiceProvider);
}
Invariant.Assert(serviceProvider != null, "No ServiceProvider found to get TextView from.");
ITextView textView = serviceProvider.GetService(typeof(ITextView)) as ITextView;
Invariant.Assert(textView != null, "Null TextView provided by ServiceProvider.");
textAnchor = TextAnchor.TrimToIntersectionWith(textAnchor, textView.TextSegments);
if (textAnchor == null)
{
attachmentLevel = AttachmentLevel.Unresolved;
}
else
{
if (textAnchor.Start.CompareTo(start) != 0)
{
attachmentLevel &= ~AttachmentLevel.StartPortion;
}
if (textAnchor.End.CompareTo(end) != 0)
{
attachmentLevel &= ~AttachmentLevel.EndPortion;
}
}
}
return(textAnchor);
}