// Token: 0x060039C1 RID: 14785 RVA: 0x001064C0 File Offset: 0x001046C0
private static bool IsAdjacentToFormatElement(ITextPointer pointer, LogicalDirection direction)
{
bool result = false;
if (direction == LogicalDirection.Forward)
{
TextPointerContext pointerContext = pointer.GetPointerContext(LogicalDirection.Forward);
if (pointerContext == TextPointerContext.ElementStart && TextSchema.IsFormattingType(pointer.GetElementType(LogicalDirection.Forward)))
{
result = true;
}
else if (pointerContext == TextPointerContext.ElementEnd && TextSchema.IsFormattingType(pointer.ParentType))
{
result = true;
}
}
else
{
TextPointerContext pointerContext = pointer.GetPointerContext(LogicalDirection.Backward);
if (pointerContext == TextPointerContext.ElementEnd && TextSchema.IsFormattingType(pointer.GetElementType(LogicalDirection.Backward)))
{
result = true;
}
else if (pointerContext == TextPointerContext.ElementStart && TextSchema.IsFormattingType(pointer.ParentType))
{
result = true;
}
}
return(result);
}
// Token: 0x06007245 RID: 29253 RVA: 0x0020AA54 File Offset: 0x00208C54
internal static List <AutomationPeer> GetAutomationPeersFromRange(ITextPointer start, ITextPointer end, ITextPointer ownerContentStart)
{
List <AutomationPeer> list = new List <AutomationPeer>();
start = start.CreatePointer();
while (start.CompareTo(end) < 0)
{
bool flag = false;
if (start.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementStart)
{
object adjacentElement = start.GetAdjacentElement(LogicalDirection.Forward);
if (adjacentElement is ContentElement)
{
AutomationPeer automationPeer = ContentElementAutomationPeer.CreatePeerForElement((ContentElement)adjacentElement);
if (automationPeer != null)
{
if (ownerContentStart == null || TextContainerHelper.IsImmediateAutomationChild(start, ownerContentStart))
{
list.Add(automationPeer);
}
start.MoveToNextContextPosition(LogicalDirection.Forward);
start.MoveToElementEdge(ElementEdge.AfterEnd);
flag = true;
}
}
}
else if (start.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.EmbeddedElement)
{
object adjacentElement = start.GetAdjacentElement(LogicalDirection.Forward);
if (adjacentElement is UIElement)
{
if (ownerContentStart == null || TextContainerHelper.IsImmediateAutomationChild(start, ownerContentStart))
{
AutomationPeer automationPeer = UIElementAutomationPeer.CreatePeerForElement((UIElement)adjacentElement);
if (automationPeer != null)
{
list.Add(automationPeer);
}
else
{
TextContainerHelper.iterate((Visual)adjacentElement, list);
}
}
}
else if (adjacentElement is ContentElement)
{
AutomationPeer automationPeer = ContentElementAutomationPeer.CreatePeerForElement((ContentElement)adjacentElement);
if (automationPeer != null && (ownerContentStart == null || TextContainerHelper.IsImmediateAutomationChild(start, ownerContentStart)))
{
list.Add(automationPeer);
}
}
}
if (!flag && !start.MoveToNextContextPosition(LogicalDirection.Forward))
{
break;
}
}
return(list);
}
// Token: 0x060038D8 RID: 14552 RVA: 0x00100E4C File Offset: 0x000FF04C
private static bool IsErrorAtNonMergeableInlineEdge(SpellingError spellingError, out ITextPointer textStart, out ITextPointer textEnd)
{
bool result = false;
textStart = spellingError.Start.CreatePointer(LogicalDirection.Backward);
while (textStart.CompareTo(spellingError.End) < 0 && textStart.GetPointerContext(LogicalDirection.Forward) != TextPointerContext.Text)
{
textStart.MoveToNextContextPosition(LogicalDirection.Forward);
}
textEnd = spellingError.End.CreatePointer();
while (textEnd.CompareTo(spellingError.Start) > 0 && textEnd.GetPointerContext(LogicalDirection.Backward) != TextPointerContext.Text)
{
textEnd.MoveToNextContextPosition(LogicalDirection.Backward);
}
if (textStart.GetPointerContext(LogicalDirection.Forward) != TextPointerContext.Text || textStart.CompareTo(spellingError.End) == 0)
{
return(false);
}
Invariant.Assert(textEnd.GetPointerContext(LogicalDirection.Backward) == TextPointerContext.Text && textEnd.CompareTo(spellingError.Start) != 0);
if ((TextPointerBase.IsAtNonMergeableInlineStart(textStart) || TextPointerBase.IsAtNonMergeableInlineEnd(textEnd)) && typeof(Run).IsAssignableFrom(textStart.ParentType) && textStart.HasEqualScope(textEnd))
{
result = true;
}
return(result);
}
// Token: 0x06002C19 RID: 11289 RVA: 0x000C8360 File Offset: 0x000C6560
private static DocumentSequenceTextPointer xGetClingDSTP(DocumentSequenceTextPointer thisTp, LogicalDirection direction)
{
TextPointerContext pointerContext = thisTp.ChildPointer.GetPointerContext(direction);
if (pointerContext != TextPointerContext.None)
{
return(thisTp);
}
ChildDocumentBlock childDocumentBlock = thisTp.ChildBlock;
ITextPointer textPointer = thisTp.ChildPointer;
if (direction == LogicalDirection.Forward)
{
while (pointerContext == TextPointerContext.None)
{
if (childDocumentBlock.IsTail)
{
break;
}
childDocumentBlock = childDocumentBlock.NextBlock;
textPointer = childDocumentBlock.ChildContainer.Start;
pointerContext = textPointer.GetPointerContext(direction);
}
}
else
{
while (pointerContext == TextPointerContext.None && !childDocumentBlock.IsHead)
{
childDocumentBlock = childDocumentBlock.PreviousBlock;
textPointer = childDocumentBlock.ChildContainer.End;
pointerContext = textPointer.GetPointerContext(direction);
}
}
return(new DocumentSequenceTextPointer(childDocumentBlock, textPointer));
}
// Token: 0x06007CED RID: 31981 RVA: 0x0023255C File Offset: 0x0023075C
private static FlowDirection GetTextFlowDirection(ITextPointer pointer)
{
Invariant.Assert(pointer != null, "Null pointer passed.");
Invariant.Assert(pointer.IsAtInsertionPosition, "Pointer is not an insertion position");
int num = 0;
LogicalDirection logicalDirection = pointer.LogicalDirection;
TextPointerContext pointerContext = pointer.GetPointerContext(logicalDirection);
FlowDirection result;
if ((pointerContext == TextPointerContext.ElementEnd || pointerContext == TextPointerContext.ElementStart) && !TextSchema.IsFormattingType(pointer.ParentType))
{
result = (FlowDirection)pointer.GetValue(FrameworkElement.FlowDirectionProperty);
}
else
{
Rect anchorRectangle = TextSelectionHelper.GetAnchorRectangle(pointer);
ITextPointer textPointer = pointer.GetNextInsertionPosition(logicalDirection);
if (textPointer != null)
{
textPointer = textPointer.CreatePointer((logicalDirection == LogicalDirection.Backward) ? LogicalDirection.Forward : LogicalDirection.Backward);
if (logicalDirection == LogicalDirection.Forward)
{
if (pointerContext == TextPointerContext.ElementEnd && textPointer.GetPointerContext(textPointer.LogicalDirection) == TextPointerContext.ElementStart)
{
return((FlowDirection)pointer.GetValue(FrameworkElement.FlowDirectionProperty));
}
}
else if (pointerContext == TextPointerContext.ElementStart && textPointer.GetPointerContext(textPointer.LogicalDirection) == TextPointerContext.ElementEnd)
{
return((FlowDirection)pointer.GetValue(FrameworkElement.FlowDirectionProperty));
}
Rect anchorRectangle2 = TextSelectionHelper.GetAnchorRectangle(textPointer);
if (anchorRectangle2 != Rect.Empty && anchorRectangle != Rect.Empty)
{
num = Math.Sign(anchorRectangle2.Left - anchorRectangle.Left);
if (logicalDirection == LogicalDirection.Backward)
{
num = -num;
}
}
}
if (num == 0)
{
result = (FlowDirection)pointer.GetValue(FrameworkElement.FlowDirectionProperty);
}
else
{
result = ((num > 0) ? FlowDirection.LeftToRight : FlowDirection.RightToLeft);
}
}
return(result);
}
// Token: 0x06006B2D RID: 27437 RVA: 0x001EF394 File Offset: 0x001ED594
private List <TextElement> GetAttachedObjectElements(int dcpFirst, int dcpLast)
{
List <TextElement> list = new List <TextElement>();
ITextPointer contentStart = TextContainerHelper.GetContentStart(base.StructuralCache.TextContainer, base.Element);
ITextPointer textPointerFromCP = TextContainerHelper.GetTextPointerFromCP(base.StructuralCache.TextContainer, base.ParagraphStartCharacterPosition + dcpFirst, LogicalDirection.Forward);
if (dcpLast > base.Cch)
{
dcpLast = base.Cch;
}
while (contentStart.GetOffsetToPosition(textPointerFromCP) < dcpLast)
{
if (textPointerFromCP.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementStart)
{
TextElement adjacentElementFromOuterPosition = ((TextPointer)textPointerFromCP).GetAdjacentElementFromOuterPosition(LogicalDirection.Forward);
if (adjacentElementFromOuterPosition is Figure || adjacentElementFromOuterPosition is Floater)
{
list.Add(adjacentElementFromOuterPosition);
textPointerFromCP.MoveByOffset(adjacentElementFromOuterPosition.SymbolCount);
}
else
{
textPointerFromCP.MoveToNextContextPosition(LogicalDirection.Forward);
}
}
else
{
textPointerFromCP.MoveToNextContextPosition(LogicalDirection.Forward);
}
}
return(list);
}
// Token: 0x06003889 RID: 14473 RVA: 0x000FDB54 File Offset: 0x000FBD54
private static UIElement GetUIElementWhenMouseOver(TextEditor This, Point mouseMovePoint)
{
ITextPointer textPositionFromPoint = This.TextView.GetTextPositionFromPoint(mouseMovePoint, false);
if (textPositionFromPoint == null)
{
return(null);
}
if (textPositionFromPoint.GetPointerContext(textPositionFromPoint.LogicalDirection) != TextPointerContext.EmbeddedElement)
{
return(null);
}
ITextPointer textPointer = textPositionFromPoint.GetNextContextPosition(textPositionFromPoint.LogicalDirection);
LogicalDirection gravity = (textPositionFromPoint.LogicalDirection == LogicalDirection.Forward) ? LogicalDirection.Backward : LogicalDirection.Forward;
textPointer = textPointer.CreatePointer(0, gravity);
Rect rectangleFromTextPosition = This.TextView.GetRectangleFromTextPosition(textPositionFromPoint);
Rect rectangleFromTextPosition2 = This.TextView.GetRectangleFromTextPosition(textPointer);
Rect rect = rectangleFromTextPosition;
rect.Union(rectangleFromTextPosition2);
if (!rect.Contains(mouseMovePoint))
{
return(null);
}
return(textPositionFromPoint.GetAdjacentElement(textPositionFromPoint.LogicalDirection) as UIElement);
}
// Token: 0x060038DB RID: 14555 RVA: 0x00100F94 File Offset: 0x000FF194
private static ITextPointer GetNextTextPosition(ITextPointer position, ITextPointer limit, LogicalDirection direction, out char character)
{
bool flag = false;
character = '\0';
while (position != null && !flag && (limit == null || position.CompareTo(limit) < 0))
{
switch (position.GetPointerContext(direction))
{
case TextPointerContext.Text:
{
char[] array = new char[1];
position.GetTextInRun(direction, array, 0, 1);
character = array[0];
flag = true;
continue;
}
case TextPointerContext.ElementStart:
case TextPointerContext.ElementEnd:
if (TextSchema.IsFormattingType(position.GetElementType(direction)))
{
position = position.CreatePointer(1);
continue;
}
position = null;
continue;
}
position = null;
}
return(position);
}
// Token: 0x060068B0 RID: 26800 RVA: 0x001D8BE4 File Offset: 0x001D6DE4
protected override BaseParagraph GetParagraph(ITextPointer textPointer, bool fEmptyOk)
{
Invariant.Assert(textPointer is TextPointer);
BaseParagraph baseParagraph = null;
while (baseParagraph == null)
{
TextPointerContext pointerContext = textPointer.GetPointerContext(LogicalDirection.Forward);
if (pointerContext == TextPointerContext.ElementStart)
{
TextElement adjacentElementFromOuterPosition = ((TextPointer)textPointer).GetAdjacentElementFromOuterPosition(LogicalDirection.Forward);
if (adjacentElementFromOuterPosition is ListItem)
{
baseParagraph = new ListItemParagraph(adjacentElementFromOuterPosition, base.StructuralCache);
break;
}
if (adjacentElementFromOuterPosition is List)
{
baseParagraph = new ListParagraph(adjacentElementFromOuterPosition, base.StructuralCache);
break;
}
if (((TextPointer)textPointer).IsFrozen)
{
textPointer = textPointer.CreatePointer();
}
textPointer.MoveToPosition(adjacentElementFromOuterPosition.ElementEnd);
}
else if (pointerContext == TextPointerContext.ElementEnd)
{
if (base.Element == ((TextPointer)textPointer).Parent)
{
break;
}
if (((TextPointer)textPointer).IsFrozen)
{
textPointer = textPointer.CreatePointer();
}
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
}
else
{
if (((TextPointer)textPointer).IsFrozen)
{
textPointer = textPointer.CreatePointer();
}
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
}
}
if (baseParagraph != null)
{
base.StructuralCache.CurrentFormatContext.DependentMax = (TextPointer)textPointer;
}
return(baseParagraph);
}
//------------------------------------------------------
//
// Internal Property
//
//------------------------------------------------------
//------------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
#region Private Methods
private static DocumentSequenceTextPointer xGetClingDSTP(DocumentSequenceTextPointer thisTp, LogicalDirection direction)
{
TextPointerContext context = thisTp.ChildPointer.GetPointerContext(direction);
if (context != TextPointerContext.None)
{
return(thisTp);
}
ChildDocumentBlock block = thisTp.ChildBlock;
ITextPointer pointer = thisTp.ChildPointer;
if (direction == LogicalDirection.Forward)
{
while (context == TextPointerContext.None && !block.IsTail)
{
// get next block
block = block.NextBlock;
// get start
pointer = block.ChildContainer.Start;
context = pointer.GetPointerContext(direction);
}
}
else
{
Debug.Assert(direction == LogicalDirection.Backward);
while (context == TextPointerContext.None && !block.IsHead)
{
// get next block
block = block.PreviousBlock;
// get start
pointer = block.ChildContainer.End;
context = pointer.GetPointerContext(direction);
}
}
return(new DocumentSequenceTextPointer(block, pointer));
}
// Token: 0x06008461 RID: 33889 RVA: 0x00247F80 File Offset: 0x00246180
internal void AddCompositionLines()
{
this._compositionLines.Clear();
ITextPointer textPointer = this._textView.TextContainer.Start.CreatePointer(this._startOffset, LogicalDirection.Forward);
ITextPointer textPointer2 = this._textView.TextContainer.Start.CreatePointer(this._endOffset, LogicalDirection.Backward);
while (textPointer.CompareTo(textPointer2) < 0 && textPointer.GetPointerContext(LogicalDirection.Forward) != TextPointerContext.Text)
{
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
}
Invariant.Assert(textPointer.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text);
if (textPointer2.HasValidLayout)
{
this._startRect = this._textView.GetRectangleFromTextPosition(textPointer);
this._endRect = this._textView.GetRectangleFromTextPosition(textPointer2);
if (this._startRect.Top != this._endRect.Top)
{
this.AddMultipleCompositionLines(textPointer, textPointer2);
return;
}
Color lineColor = this._textServicesDisplayAttribute.GetLineColor(textPointer);
this._compositionLines.Add(new CompositionAdorner.CompositionLine(this._startRect, this._endRect, lineColor));
}
}
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
// Add the composition lines for rendering the composition lines.
internal void AddCompositionLines()
{
// Erase any current lines.
_compositionLines.Clear();
ITextPointer start = _textView.TextContainer.Start.CreatePointer(_startOffset, LogicalDirection.Forward);
ITextPointer end = _textView.TextContainer.Start.CreatePointer(_endOffset, LogicalDirection.Backward);
while (start.CompareTo(end) < 0 && start.GetPointerContext(LogicalDirection.Forward) != TextPointerContext.Text)
{
start.MoveToNextContextPosition(LogicalDirection.Forward);
}
Invariant.Assert(start.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text);
if (end.HasValidLayout)
{
// Get the rectangle for start/end position
_startRect = _textView.GetRectangleFromTextPosition(start);
_endRect = _textView.GetRectangleFromTextPosition(end);
// Check whether the composition line is single or multiple lines
if (_startRect.Top != _endRect.Top)
{
// Add the composition lines to be rendered for the composition string
AddMultipleCompositionLines(start, end);
}
else
{
// Set the start/end pointer to draw the line
Color lineColor = _textServicesDisplayAttribute.GetLineColor(start);
// Add the composition line to be rendered
_compositionLines.Add(new CompositionLine(_startRect, _endRect, lineColor));
}
}
}
// Token: 0x06003282 RID: 12930 RVA: 0x000DD010 File Offset: 0x000DB210
internal static bool HasNoTextContent(Paragraph paragraph)
{
ITextPointer textPointer = paragraph.ContentStart.CreatePointer();
ITextPointer contentEnd = paragraph.ContentEnd;
while (textPointer.CompareTo(contentEnd) < 0)
{
TextPointerContext pointerContext = textPointer.GetPointerContext(LogicalDirection.Forward);
if (pointerContext == TextPointerContext.Text || pointerContext == TextPointerContext.EmbeddedElement || typeof(LineBreak).IsAssignableFrom(textPointer.ParentType) || typeof(AnchoredBlock).IsAssignableFrom(textPointer.ParentType))
{
return(false);
}
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
}
return(true);
}
// Token: 0x06006B2C RID: 27436 RVA: 0x001EF318 File Offset: 0x001ED518
internal int GetLastDcpAttachedObjectBeforeLine(int dcpFirst)
{
ITextPointer textPointerFromCP = TextContainerHelper.GetTextPointerFromCP(base.StructuralCache.TextContainer, base.ParagraphStartCharacterPosition + dcpFirst, LogicalDirection.Forward);
ITextPointer contentStart = TextContainerHelper.GetContentStart(base.StructuralCache.TextContainer, base.Element);
while (textPointerFromCP.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementStart)
{
TextElement adjacentElementFromOuterPosition = ((TextPointer)textPointerFromCP).GetAdjacentElementFromOuterPosition(LogicalDirection.Forward);
if (!(adjacentElementFromOuterPosition is Figure) && !(adjacentElementFromOuterPosition is Floater))
{
break;
}
textPointerFromCP.MoveByOffset(adjacentElementFromOuterPosition.SymbolCount);
}
return(contentStart.GetOffsetToPosition(textPointerFromCP));
}
// Token: 0x06008E5B RID: 36443 RVA: 0x0025BE9C File Offset: 0x0025A09C
private void GetContent()
{
this._contentSegments.Clear();
ITextPointer textPointer = this._segment.Start.CreatePointer();
ITextPointer textPointer2 = null;
while (textPointer.CompareTo(this._segment.End) < 0)
{
TextPointerContext pointerContext = textPointer.GetPointerContext(LogicalDirection.Forward);
if (pointerContext == TextPointerContext.ElementStart)
{
Type elementType = textPointer.GetElementType(LogicalDirection.Forward);
if (typeof(Run).IsAssignableFrom(elementType) || typeof(BlockUIContainer).IsAssignableFrom(elementType))
{
this.OpenSegment(ref textPointer2, textPointer);
}
else if (typeof(Table).IsAssignableFrom(elementType) || typeof(Floater).IsAssignableFrom(elementType) || typeof(Figure).IsAssignableFrom(elementType))
{
this.CloseSegment(ref textPointer2, textPointer, this._segment.End);
}
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
if (typeof(Run).IsAssignableFrom(elementType) || typeof(BlockUIContainer).IsAssignableFrom(elementType))
{
textPointer.MoveToElementEdge(ElementEdge.AfterEnd);
}
}
else if (pointerContext == TextPointerContext.ElementEnd)
{
Type parentType = textPointer.ParentType;
if (typeof(TableCell).IsAssignableFrom(parentType) || typeof(Floater).IsAssignableFrom(parentType) || typeof(Figure).IsAssignableFrom(parentType))
{
this.CloseSegment(ref textPointer2, textPointer, this._segment.End);
}
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
}
else if (pointerContext == TextPointerContext.Text || pointerContext == TextPointerContext.EmbeddedElement)
{
this.OpenSegment(ref textPointer2, textPointer);
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
}
else
{
Invariant.Assert(false, "unexpected TextPointerContext");
}
}
this.CloseSegment(ref textPointer2, textPointer, this._segment.End);
}
// Returns the position preceeding the next text character in a specified
// direction, or null if no such position exists.
// The scan will halt if limit is encounted; limit may be null.
private static ITextPointer GetNextTextPosition(ITextPointer position, ITextPointer limit, LogicalDirection direction, out char character)
{
bool foundText = false;
character = (char)0;
while (position != null &&
!foundText &&
(limit == null || position.CompareTo(limit) < 0))
{
switch (position.GetPointerContext(direction))
{
case TextPointerContext.Text:
char[] buffer = new char[1];
position.GetTextInRun(direction, buffer, 0, 1);
character = buffer[0];
foundText = true;
break;
case TextPointerContext.ElementStart:
case TextPointerContext.ElementEnd:
if (TextSchema.IsFormattingType(position.GetElementType(direction)))
{
position = position.CreatePointer(+1);
}
else
{
position = null;
}
break;
case TextPointerContext.EmbeddedElement:
case TextPointerContext.None:
default:
position = null;
break;
}
}
return(position);
}
// Return a UIElement when mouseMovePoint is within the ui element's bounding Rect. Null otherwise.
private static UIElement GetUIElementWhenMouseOver(TextEditor This, Point mouseMovePoint)
{
ITextPointer mouseMovePosition = This.TextView.GetTextPositionFromPoint(mouseMovePoint, /*snapToText:*/ false);
if (mouseMovePosition == null)
{
return(null);
}
if (!(mouseMovePosition.GetPointerContext(mouseMovePosition.LogicalDirection) == TextPointerContext.EmbeddedElement))
{
return(null);
}
// Find out if mouseMovePoint is within the bounding Rect of UIElement, we need to do this check explicitly
// because even when snapToText is false, textview returns a first/last position on a line when point is in
// an area before/after line start/end. This is by-design behavior for textview.
// Need to get Rect from TextView, since Rect returned by TextPointer.GetCharacterRect()
// is transformed to UiScope coordinates and we want RenderScope coordinates here.
ITextPointer otherEdgePosition = mouseMovePosition.GetNextContextPosition(mouseMovePosition.LogicalDirection);
LogicalDirection otherEdgeDirection = (mouseMovePosition.LogicalDirection == LogicalDirection.Forward) ?
LogicalDirection.Backward : LogicalDirection.Forward;
// Normalize with correct gravity
otherEdgePosition = otherEdgePosition.CreatePointer(0, otherEdgeDirection);
Rect uiElementFirstEdgeRect = This.TextView.GetRectangleFromTextPosition(mouseMovePosition);
Rect uiElementSecondEdgeRect = This.TextView.GetRectangleFromTextPosition(otherEdgePosition);
Rect boundingRect = uiElementFirstEdgeRect;
boundingRect.Union(uiElementSecondEdgeRect);
if (!boundingRect.Contains(mouseMovePoint))
{
return(null);
}
return(mouseMovePosition.GetAdjacentElement(mouseMovePosition.LogicalDirection) as UIElement);
}
// Token: 0x06008465 RID: 33893 RVA: 0x002480A0 File Offset: 0x002462A0
private void AddMultipleCompositionLines(ITextPointer start, ITextPointer end)
{
ITextPointer textPointer = start;
ITextPointer textPointer2 = textPointer;
while (textPointer2.CompareTo(end) < 0)
{
TextSegment lineRange = this._textView.GetLineRange(textPointer2);
if (lineRange.IsNull)
{
textPointer = textPointer2;
}
else
{
if (textPointer.CompareTo(lineRange.Start) < 0)
{
textPointer = lineRange.Start;
}
if (textPointer2.CompareTo(lineRange.End) < 0)
{
if (end.CompareTo(lineRange.End) < 0)
{
textPointer2 = end.CreatePointer();
}
else
{
textPointer2 = lineRange.End.CreatePointer(LogicalDirection.Backward);
}
}
Rect rectangleFromTextPosition = this._textView.GetRectangleFromTextPosition(textPointer);
Rect rectangleFromTextPosition2 = this._textView.GetRectangleFromTextPosition(textPointer2);
this._compositionLines.Add(new CompositionAdorner.CompositionLine(rectangleFromTextPosition, rectangleFromTextPosition2, this._textServicesDisplayAttribute.GetLineColor(textPointer)));
textPointer = lineRange.End.CreatePointer(LogicalDirection.Forward);
}
while (textPointer.GetPointerContext(LogicalDirection.Forward) != TextPointerContext.None && textPointer.GetPointerContext(LogicalDirection.Forward) != TextPointerContext.Text)
{
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
}
textPointer2 = textPointer;
}
}
// Token: 0x06006600 RID: 26112 RVA: 0x001CAB08 File Offset: 0x001C8D08
public override TextSpan <CultureSpecificCharacterBufferRange> GetPrecedingText(int dcp)
{
int num = 0;
CharacterBufferRange empty = CharacterBufferRange.Empty;
CultureInfo culture = null;
if (dcp > 0)
{
ITextPointer textPointer = this._owner.TextContainer.CreatePointerAtOffset(dcp, LogicalDirection.Backward);
while (textPointer.GetPointerContext(LogicalDirection.Backward) != TextPointerContext.Text && textPointer.CompareTo(this._owner.TextContainer.Start) != 0)
{
textPointer.MoveByOffset(-1);
num++;
}
string textInRun = textPointer.GetTextInRun(LogicalDirection.Backward);
empty = new CharacterBufferRange(textInRun, 0, textInRun.Length);
StaticTextPointer staticTextPointer = textPointer.CreateStaticPointer();
DependencyObject element = (staticTextPointer.Parent != null) ? staticTextPointer.Parent : this._owner;
culture = DynamicPropertyReader.GetCultureInfo(element);
}
return(new TextSpan <CultureSpecificCharacterBufferRange>(num + empty.Length, new CultureSpecificCharacterBufferRange(culture, empty)));
}
/// <summary>
/// Get text immediately before specified text source position. Return CharacterBufferRange
/// containing this text.
/// </summary>
/// <param name="dcp">
/// dcp of position relative to start of line
/// </param>
internal override TextSpan <CultureSpecificCharacterBufferRange> GetPrecedingText(int dcp)
{
// Parameter validation
Invariant.Assert(dcp >= 0);
int nonTextLength = 0;
CharacterBufferRange precedingText = CharacterBufferRange.Empty;
CultureInfo culture = null;
if (dcp > 0)
{
// Create TextPointer at dcp, and pointer at paragraph start to compare
ITextPointer startPosition = TextContainerHelper.GetTextPointerFromCP(_paraClient.Paragraph.StructuralCache.TextContainer, _cpPara, LogicalDirection.Forward);
ITextPointer position = TextContainerHelper.GetTextPointerFromCP(_paraClient.Paragraph.StructuralCache.TextContainer, _cpPara + dcp, LogicalDirection.Forward);
// Move backward until we find a position at the end of a text run, or reach start of TextContainer
while (position.GetPointerContext(LogicalDirection.Backward) != TextPointerContext.Text &&
position.CompareTo(startPosition) != 0)
{
position.MoveByOffset(-1);
nonTextLength++;
}
// Return text in run. If it is at start of TextContainer this will return an empty string
string precedingTextString = position.GetTextInRun(LogicalDirection.Backward);
precedingText = new CharacterBufferRange(precedingTextString, 0, precedingTextString.Length);
StaticTextPointer pointer = position.CreateStaticPointer();
DependencyObject element = (pointer.Parent != null) ? pointer.Parent : _paraClient.Paragraph.Element;
culture = DynamicPropertyReader.GetCultureInfo(element);
}
return(new TextSpan <CultureSpecificCharacterBufferRange>(
nonTextLength + precedingText.Length,
new CultureSpecificCharacterBufferRange(culture, precedingText)
));
}
// Token: 0x06006864 RID: 26724 RVA: 0x001D6C0C File Offset: 0x001D4E0C
internal override TextSpan <CultureSpecificCharacterBufferRange> GetPrecedingText(int dcp)
{
Invariant.Assert(dcp >= 0);
int num = 0;
CharacterBufferRange empty = CharacterBufferRange.Empty;
CultureInfo culture = null;
if (dcp > 0)
{
ITextPointer textPointerFromCP = TextContainerHelper.GetTextPointerFromCP(this._paraClient.Paragraph.StructuralCache.TextContainer, this._cpPara, LogicalDirection.Forward);
ITextPointer textPointerFromCP2 = TextContainerHelper.GetTextPointerFromCP(this._paraClient.Paragraph.StructuralCache.TextContainer, this._cpPara + dcp, LogicalDirection.Forward);
while (textPointerFromCP2.GetPointerContext(LogicalDirection.Backward) != TextPointerContext.Text && textPointerFromCP2.CompareTo(textPointerFromCP) != 0)
{
textPointerFromCP2.MoveByOffset(-1);
num++;
}
string textInRun = textPointerFromCP2.GetTextInRun(LogicalDirection.Backward);
empty = new CharacterBufferRange(textInRun, 0, textInRun.Length);
StaticTextPointer staticTextPointer = textPointerFromCP2.CreateStaticPointer();
DependencyObject element = (staticTextPointer.Parent != null) ? staticTextPointer.Parent : this._paraClient.Paragraph.Element;
culture = DynamicPropertyReader.GetCultureInfo(element);
}
return(new TextSpan <CultureSpecificCharacterBufferRange>(num + empty.Length, new CultureSpecificCharacterBufferRange(culture, empty)));
}
// ------------------------------------------------------------------
// Get text immediately before specified text source position.
// ------------------------------------------------------------------
public override TextSpan <CultureSpecificCharacterBufferRange> GetPrecedingText(int dcp)
{
// Parameter validation
Debug.Assert(dcp >= 0);
int nonTextLength = 0;
CharacterBufferRange precedingText = CharacterBufferRange.Empty;
CultureInfo culture = null;
if (dcp > 0)
{
// Create TextPointer at dcp
ITextPointer position = _owner.TextContainer.CreatePointerAtOffset(dcp, LogicalDirection.Backward);
// Move backward until we find a position at the end of a text run, or reach start of TextContainer
while (position.GetPointerContext(LogicalDirection.Backward) != TextPointerContext.Text &&
position.CompareTo(_owner.TextContainer.Start) != 0)
{
position.MoveByOffset(-1);
nonTextLength++;
}
// Return text in run. If it is at start of TextContainer this will return an empty string
string precedingTextString = position.GetTextInRun(LogicalDirection.Backward);
precedingText = new CharacterBufferRange(precedingTextString, 0, precedingTextString.Length);
StaticTextPointer pointer = position.CreateStaticPointer();
DependencyObject element = (pointer.Parent != null) ? pointer.Parent : _owner;
culture = DynamicPropertyReader.GetCultureInfo(element);
}
return(new TextSpan <CultureSpecificCharacterBufferRange>(
nonTextLength + precedingText.Length,
new CultureSpecificCharacterBufferRange(culture, precedingText)
));
}
internal static bool IsAtNormalizedPosition(ITextPointer position, LogicalDirection direction, bool respectCaretUnitBoundaries)
{
if (!IsAtNormalizedPosition(position, respectCaretUnitBoundaries))
{
return false;
}
//
if (position.GetPointerContext(LogicalDirection.Backward) == TextPointerContext.ElementStart &&
position.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementEnd)
{
return true;
}
// Check if there is no any formatting tags in the given direction
if (TextSchema.IsFormattingType(position.GetElementType(direction)))
{
position = position.CreatePointer();
while (TextSchema.IsFormattingType(position.GetElementType(direction)))
{
position.MoveToNextContextPosition(direction);
}
if (IsAtNormalizedPosition(position, respectCaretUnitBoundaries))
{
// So there is a possibility to move over formatting tags only
// and reach some insertion position. This means
// that our position was not normalized in the given direction.
return false;
}
}
return true;
}
/// <summary>
/// </summary>
void ITextSelection.SetCaretToPosition(ITextPointer caretPosition, LogicalDirection direction, bool allowStopAtLineEnd, bool allowStopNearSpace)
{
// We need a pointer with appropriate direction,
// becasue it will be used in textRangeBase.Select method for
// pointer normalization.
caretPosition = caretPosition.CreatePointer(direction);
// Normalize the position in its logical direction - to get to text content over there.
caretPosition.MoveToInsertionPosition(direction);
// We need a pointer with the reverse direction to confirm
// the line wrapping position. So we can ensure Bidi caret navigation.
// Bidi can have the different caret position by setting the
// logical direction, so we have to only set the logical direction
// as the forward for the real line wrapping position.
ITextPointer reversePosition = caretPosition.CreatePointer(direction == LogicalDirection.Forward ? LogicalDirection.Backward : LogicalDirection.Forward);
// Check line wrapping condition
if (!allowStopAtLineEnd &&
((TextPointerBase.IsAtLineWrappingPosition(caretPosition, this.TextView) &&
TextPointerBase.IsAtLineWrappingPosition(reversePosition, this.TextView)) ||
TextPointerBase.IsNextToPlainLineBreak(caretPosition, LogicalDirection.Backward) ||
TextSchema.IsBreak(caretPosition.GetElementType(LogicalDirection.Backward))))
{
// Caret is at wrapping position, and we are not allowed to stay at end of line,
// so we choose forward direction to appear in the begiinning of a second line
caretPosition.SetLogicalDirection(LogicalDirection.Forward);
}
else
{
if (caretPosition.GetPointerContext(LogicalDirection.Backward) == TextPointerContext.Text &&
caretPosition.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text)
{
// This is statistically most typical case. No "smartness" needed
// to choose standard Forward orientation for the caret.
// NOTE: By using caretPosition's direction we solve BiDi caret orientation case:
// The orietnation reflects a direction from where caret has been moved
// or orientation where mouse clicked. So we will stick with appropriate
// character.
// Nothing to do. The caretPosition is good to go.
}
else if (!allowStopNearSpace)
{
// There are some tags around, and we are not allowed to choose a side near to space.
// So we need to perform some content analysis.
char[] charBuffer = new char[1];
if (caretPosition.GetPointerContext(direction) == TextPointerContext.Text &&
caretPosition.GetTextInRun(direction, charBuffer, 0, 1) == 1 &&
Char.IsWhiteSpace(charBuffer[0]))
{
LogicalDirection oppositeDirection = direction == LogicalDirection.Forward ? LogicalDirection.Backward : LogicalDirection.Forward;
// Check formatting switch condition at this position
FlowDirection initialFlowDirection = (FlowDirection)caretPosition.GetValue(FrameworkElement.FlowDirectionProperty);
bool moved = caretPosition.MoveToInsertionPosition(oppositeDirection);
if (moved &&
initialFlowDirection == (FlowDirection)caretPosition.GetValue(FrameworkElement.FlowDirectionProperty) &&
(caretPosition.GetPointerContext(oppositeDirection) != TextPointerContext.Text ||
caretPosition.GetTextInRun(oppositeDirection, charBuffer, 0, 1) != 1 ||
!Char.IsWhiteSpace(charBuffer[0])))
{
// In the opposite direction we have a non-space
// character. So we choose that direction
direction = oppositeDirection;
caretPosition.SetLogicalDirection(direction);
}
}
}
}
// Now that orientation of a caretPosition is identified,
// build an empty selection at this position
TextRangeBase.BeginChange(this);
try
{
TextRangeBase.Select(this, caretPosition, caretPosition);
// Note how Select method works for the case of empty range:
// It creates a single instance TextPointer normalized and oriented
// in a direction taken from caretPosition:
ITextSelection thisSelection = this;
Invariant.Assert(thisSelection.Start.LogicalDirection == caretPosition.LogicalDirection); // orientation must be as passed
Invariant.Assert(this.IsEmpty);
//Invariant.Assert((object)thisSelection.Start == (object)thisSelection.End); // it must be the same instance of TextPointer
//Invariant.Assert(TextPointerBase.IsAtInsertionPosition(thisSelection.Start, caretPosition.LogicalDirection)); // normalization must be done in the same diredction as orientation
// Clear active positions when selection is empty
SetActivePositions(null, null);
}
finally
{
TextRangeBase.EndChange(this);
}
}
// Token: 0x06002EDF RID: 11999 RVA: 0x000D3640 File Offset: 0x000D1840
internal override Rect GetRawRectangleFromTextPosition(ITextPointer position, out Transform transform)
{
FixedTextPointer fixedTextPointer = this.Container.VerifyPosition(position);
Rect result = new Rect(0.0, 0.0, 0.0, 10.0);
transform = Transform.Identity;
FixedPosition fixedPosition;
if (fixedTextPointer.FlowPosition.IsBoundary)
{
if (!this._GetFirstFixedPosition(fixedTextPointer, out fixedPosition))
{
return(result);
}
}
else if (!this._GetFixedPosition(fixedTextPointer, out fixedPosition))
{
if (position.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.None)
{
return(result);
}
ITextPointer position2 = position.CreatePointer(1);
FixedTextPointer ftp = this.Container.VerifyPosition(position2);
if (!this._GetFixedPosition(ftp, out fixedPosition))
{
return(result);
}
}
if (fixedPosition.Page != this.PageIndex)
{
return(result);
}
DependencyObject element = this.FixedPage.GetElement(fixedPosition.Node);
if (element is Glyphs)
{
Glyphs glyphs = (Glyphs)element;
result = FixedTextView._GetGlyphRunDesignRect(glyphs, fixedPosition.Offset, fixedPosition.Offset);
GeneralTransform transform2 = glyphs.TransformToAncestor(this.FixedPage);
result = this._GetTransformedCaretRect(transform2, result.TopLeft, result.Height);
}
else if (element is Image)
{
Image image = (Image)element;
GeneralTransform transform3 = image.TransformToAncestor(this.FixedPage);
Point origin = new Point(0.0, 0.0);
if (fixedPosition.Offset > 0)
{
origin.X += image.ActualWidth;
}
result = this._GetTransformedCaretRect(transform3, origin, image.ActualHeight);
}
else if (element is Path)
{
Path path = (Path)element;
GeneralTransform transform4 = path.TransformToAncestor(this.FixedPage);
Rect bounds = path.Data.Bounds;
Point topLeft = bounds.TopLeft;
if (fixedPosition.Offset > 0)
{
topLeft.X += bounds.Width;
}
result = this._GetTransformedCaretRect(transform4, topLeft, bounds.Height);
}
return(result);
}
private void TextPositionsFromITfRange(UnsafeNativeMethods.ITfRange range, out ITextPointer start, out ITextPointer end)
{
UnsafeNativeMethods.ITfRangeACP rangeACP;
int startIndex;
int length;
rangeACP = range as UnsafeNativeMethods.ITfRangeACP;
rangeACP.GetExtent(out startIndex, out length);
start = CreatePointerAtCharOffset(startIndex, LogicalDirection.Backward);
end = CreatePointerAtCharOffset(startIndex + length, LogicalDirection.Forward);
while (start.CompareTo(end) < 0 && start.GetPointerContext(LogicalDirection.Forward) != TextPointerContext.Text)
{
start.MoveToNextContextPosition(LogicalDirection.Forward);
}
}
internal Rect GetRectangleFromTextPosition(ITextPointer position)
{
Rect rect = System.Windows.Rect.Empty;
int cp = Paragraph.StructuralCache.TextContainer.Start.GetOffsetToPosition((TextPointer)position);
int dcp = cp - Paragraph.ParagraphStartCharacterPosition;
int originalDcp = dcp;
if (position.LogicalDirection == LogicalDirection.Backward && dcp > 0)
{
--dcp;
}
// Query paragraph details
PTS.FSTEXTDETAILS textDetails;
PTS.Validate(PTS.FsQueryTextDetails(PtsContext.Context, _paraHandle.Value, out textDetails));
// There are 3 different types of text paragraphs:
// (a) full with simple lines
// (b) full with composite lines - when figures/floaters are present
// (c) cached - when using ParaChache
if (textDetails.fsktd == PTS.FSKTEXTDETAILS.fsktdFull)
{
if (textDetails.u.full.cLines > 0)
{
int vrBaseline = 0;
if (!PTS.ToBoolean(textDetails.u.full.fLinesComposite))
{
// (a) full with simple lines
RectFromDcpSimpleLines(dcp, originalDcp, position.LogicalDirection, position.GetPointerContext(position.LogicalDirection), ref textDetails.u.full, ref rect, ref vrBaseline);
}
else
{
// (b) full with composite lines - when figures/floaters are present
RectFromDcpCompositeLines(dcp, originalDcp, position.LogicalDirection, position.GetPointerContext(position.LogicalDirection), ref textDetails.u.full, ref rect, ref vrBaseline);
}
}
}
else
{
// (c) cached - when using ParaChache
Debug.Assert(textDetails.fsktd == PTS.FSKTEXTDETAILS.fsktdCached);
Debug.Assert(false, "Should not get here. ParaCache is not currently used.");
}
// Mirror back to page flow direction
if(ThisFlowDirection != PageFlowDirection)
{
PTS.FSRECT pageRect = _pageContext.PageRect;
PTS.FSRECT rectTransform = new PTS.FSRECT(rect);
PTS.Validate(PTS.FsTransformRectangle(PTS.FlowDirectionToFswdir(ThisFlowDirection), ref pageRect, ref rectTransform, PTS.FlowDirectionToFswdir(PageFlowDirection), out rectTransform));
rect = rectTransform.FromTextDpi();
}
return rect;
}
/// <summary>
/// Advances this TextNavigator by a count number of characters.
/// </summary>
/// <param name="thisNavigator">ITextPointer to advance.</param>
/// <param name="direction">
/// A direction in which to search a next characters.
/// </param>
/// <returns>
/// True if the navigator is advanced, false if the end of document is
/// encountered and the navigator is not repositioned.
/// </returns>
/// <remarks>
/// A "character" in this context is a sequence of one or several text
/// symbols: one or more Unicode code points may be a character, every
/// embedded object is a character, a sequence of closing block tags
/// followed by opening block tags may also be a unit. Formatting tags
/// do not contribute in any unit.
/// </remarks>
internal static bool MoveToNextInsertionPosition(ITextPointer thisNavigator, LogicalDirection direction)
{
Invariant.Assert(!thisNavigator.IsFrozen, "Can't reposition a frozen pointer!");
bool moved = true;
int increment = direction == LogicalDirection.Forward ? +1 : -1;
ITextPointer initialPosition = thisNavigator.CreatePointer();
if (!IsAtInsertionPosition(thisNavigator))
{
// If the TextPointer is not currently at an insertion position,
// move the TextPointer to the next insertion position in
// the indicated direction, just like the MoveToInsertionPosition method.
if (!MoveToInsertionPosition(thisNavigator, direction))
{
// No insertion position in all content. MoveToInsertionPosition() guarantees that navigator is moved back to initial position.
moved = false;
goto Exit;
}
if ((direction == LogicalDirection.Forward && initialPosition.CompareTo(thisNavigator) < 0) ||
(direction == LogicalDirection.Backward && thisNavigator.CompareTo(initialPosition) < 0))
{
// We have found an insertion position in requested direction.
goto Exit;
}
}
// Start with skipping character formatting tags in this direction
while (TextSchema.IsFormattingType(thisNavigator.GetElementType(direction)))
{
thisNavigator.MoveByOffset(increment);
}
do
{
if (thisNavigator.GetPointerContext(direction) != TextPointerContext.None)
{
thisNavigator.MoveByOffset(increment);
}
else
{
// No insertion position in this direction; Move back
thisNavigator.MoveToPosition(initialPosition);
moved = false;
goto Exit;
}
}
while (!IsAtInsertionPosition(thisNavigator));
// We must leave position normalized in backward direction
if (direction == LogicalDirection.Backward)
{
// For this we must skip character formatting tags if we have any
while (TextSchema.IsFormattingType(thisNavigator.GetElementType(direction)))
{
thisNavigator.MoveByOffset(increment);
}
// However if it is block start we should back off
TextPointerContext context = thisNavigator.GetPointerContext(direction);
if (context == TextPointerContext.ElementStart || context == TextPointerContext.None)
{
increment = -increment;
while (TextSchema.IsFormattingType(thisNavigator.GetElementType(LogicalDirection.Forward))
&& !IsAtInsertionPosition(thisNavigator))
{
thisNavigator.MoveByOffset(increment);
}
}
}
Exit:
if (moved)
{
if (direction == LogicalDirection.Forward)
{
Invariant.Assert(thisNavigator.CompareTo(initialPosition) > 0, "thisNavigator is expected to be moved from initialPosition - 1");
}
else
{
Invariant.Assert(thisNavigator.CompareTo(initialPosition) < 0, "thisNavigator is expected to be moved from initialPosition - 2");
}
}
else
{
Invariant.Assert(thisNavigator.CompareTo(initialPosition) == 0, "thisNavigator must stay at initial position");
}
return moved;
}
// GetText handler for object runs.
private static bool WalkObjectRun(ITextPointer navigator, ITextPointer limit, char[] text, int cchReq, ref int charsCopied, UnsafeNativeMethods.TS_RUNINFO[] runInfo, int cRunInfoReq, ref int cRunInfoRcv)
{
bool hitLimit;
Invariant.Assert(navigator.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.EmbeddedElement);
Invariant.Assert(limit == null || navigator.CompareTo(limit) <= 0);
if (limit != null && navigator.CompareTo(limit) == 0)
{
return true;
}
hitLimit = false;
navigator.MoveToNextContextPosition(LogicalDirection.Forward);
if (cchReq >= 1)
{
text[charsCopied] = UnsafeNativeMethods.TS_CHAR_EMBEDDED;
charsCopied++;
}
if (cRunInfoReq > 0)
{
// Be sure to merge this text run with the previous run, if they are both text runs.
// (A good robustness fix would be to make cicero handle this, if we ever get the chance.)
if (cRunInfoRcv > 0 && runInfo[cRunInfoRcv - 1].type == UnsafeNativeMethods.TsRunType.TS_RT_PLAIN)
{
runInfo[cRunInfoRcv - 1].count++;
}
else
{
runInfo[cRunInfoRcv].count = 1;
runInfo[cRunInfoRcv].type = UnsafeNativeMethods.TsRunType.TS_RT_PLAIN;
cRunInfoRcv++;
}
}
return hitLimit;
}
private static ITextPointer RestrictWithinBlock(ITextPointer position, ITextPointer limit, LogicalDirection direction)
{
Invariant.Assert(!(direction == LogicalDirection.Backward) || position.CompareTo(limit) >= 0, "for backward direction position must be >= than limit");
Invariant.Assert(!(direction == LogicalDirection.Forward) || position.CompareTo(limit) <= 0, "for forward direcion position must be <= than linit");
while (direction == LogicalDirection.Backward ? position.CompareTo(limit) > 0 : position.CompareTo(limit) < 0)
{
TextPointerContext context = position.GetPointerContext(direction);
if (context == TextPointerContext.ElementStart || context == TextPointerContext.ElementEnd)
{
Type elementType = position.GetElementType(direction);
if (!typeof(Inline).IsAssignableFrom(elementType))
{
limit = position;
break;
}
}
else if (context == TextPointerContext.EmbeddedElement)
{
limit = position;
break;
}
position = position.GetNextContextPosition(direction);
}
// Return normalized position - in the direction towards a center position.
return limit.GetInsertionPosition(direction == LogicalDirection.Backward ? LogicalDirection.Forward : LogicalDirection.Backward);
}
// Position at document end - after the last paragraph/list/table is
// considered as valid insertion point position.
// It has though a special behavior for caret positioning and text insertion
internal static bool IsAfterLastParagraph(ITextPointer thisPosition)
{
return thisPosition.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.None &&
thisPosition.GetPointerContext(LogicalDirection.Backward) == TextPointerContext.ElementEnd &&
!typeof(Inline).IsAssignableFrom(thisPosition.GetElementType(LogicalDirection.Backward));
}
/// <summary>
/// Return true if rangeEnd is not at the end of an element.
///
/// textReader must already be at the start of the element.
/// </summary>
private static bool IsPartialNonTypographic(ITextPointer textReader, ITextPointer rangeEnd)
{
bool isPartial = false;
Invariant.Assert(textReader.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementStart);
ITextPointer elementNavigation = textReader.CreatePointer();
ITextPointer elementEnd = textReader.CreatePointer();
elementEnd.MoveToNextContextPosition(LogicalDirection.Forward);
// Find the end position
elementEnd.MoveToElementEdge(ElementEdge.AfterEnd);
if (elementEnd.CompareTo(rangeEnd) > 0)
{
isPartial = true;
}
return isPartial;
}
// -------------------------------------------------------------
//
// Private Methods
//
// -------------------------------------------------------------
#region Private Methods
// .............................................................
//
// Serialization
//
// .............................................................
/// <summary>
/// This function serializes text segment formed by rangeStart and rangeEnd to valid xml using xmlWriter.
/// </summary>
/// <SecurityNote>
/// To mask the security exception from XamlWriter.Save in partial trust case,
/// this function checks if the current call stack has the all clipboard permission.
/// </SecurityNote>
private static void WriteXamlTextSegment(XmlWriter xmlWriter, ITextPointer rangeStart, ITextPointer rangeEnd, XamlTypeMapper xamlTypeMapper, ref int elementLevel, WpfPayload wpfPayload, bool ignoreWriteHyperlinkEnd, List<int> ignoreList, bool preserveTextElements)
{
// Special case for pure text selection - we need a Run wrapper for it.
if (elementLevel == EmptyDocumentDepth && typeof(Run).IsAssignableFrom(rangeStart.ParentType))
{
elementLevel++;
xmlWriter.WriteStartElement(typeof(Run).Name);
}
// Create text navigator for reading the range's content
ITextPointer textReader = rangeStart.CreatePointer();
// Exclude last opening tag from serialization - we don't need to create extra element
// is cases when we have whole paragraphs/cells selected.
// NOTE: We do this slightly differently than in TextRangeEdit.AdjustRangeEnd, where we use normalization for adjusted position.
// In this case normalized position does not work, because we need to keep information about crossed paragraph boundary.
while (rangeEnd.GetPointerContext(LogicalDirection.Backward) == TextPointerContext.ElementStart)
{
rangeEnd = rangeEnd.GetNextContextPosition(LogicalDirection.Backward);
}
// Write the range internal contents
while (textReader.CompareTo(rangeEnd) < 0)
{
TextPointerContext runType = textReader.GetPointerContext(LogicalDirection.Forward);
switch (runType)
{
case TextPointerContext.ElementStart:
TextElement nextElement = (TextElement)textReader.GetAdjacentElement(LogicalDirection.Forward);
if (nextElement is Hyperlink)
{
// Don't write Hyperlink start element if Hyperlink is invalid
// in case of having a UiElement except Image or stated the range end
// position before the end position of the Hyperlink.
if (IsHyperlinkInvalid(textReader, rangeEnd))
{
ignoreWriteHyperlinkEnd = true;
textReader.MoveToNextContextPosition(LogicalDirection.Forward);
continue;
}
}
else if (nextElement != null)
{
//
TextElementEditingBehaviorAttribute att = (TextElementEditingBehaviorAttribute)Attribute.GetCustomAttribute(nextElement.GetType(), typeof(TextElementEditingBehaviorAttribute));
if (att != null && !att.IsTypographicOnly)
{
if (IsPartialNonTypographic(textReader, rangeEnd))
{
// Add pointer to ignore list
ITextPointer ptr = textReader.CreatePointer();
ptr.MoveToElementEdge(ElementEdge.BeforeEnd);
ignoreList.Add(ptr.Offset);
textReader.MoveToNextContextPosition(LogicalDirection.Forward);
continue;
}
}
}
elementLevel++;
textReader.MoveToNextContextPosition(LogicalDirection.Forward);
WriteStartXamlElement(/*range:*/null, textReader, xmlWriter, xamlTypeMapper, /*reduceElement:*/wpfPayload == null, preserveTextElements);
break;
case TextPointerContext.ElementEnd:
// Don't write Hyperlink end element if Hyperlink include the invalid
// in case of having a UiElement except Image or stated the range end
// before the end position of the Hyperlink or Hyperlink opening tag is
// skipped from WriteOpeningTags by selecting of the partial of Hyperlink.
if (ignoreWriteHyperlinkEnd && (textReader.GetAdjacentElement(LogicalDirection.Forward) is Hyperlink))
{
// Reset the flag to keep walk up the next Hyperlink tag
ignoreWriteHyperlinkEnd = false;
textReader.MoveToNextContextPosition(LogicalDirection.Forward);
continue;
}
// Check the ignore list
ITextPointer endPointer = textReader.CreatePointer();
endPointer.MoveToElementEdge(ElementEdge.BeforeEnd); //
if (ignoreList.Contains(endPointer.Offset))
{
ignoreList.Remove(endPointer.Offset);
textReader.MoveToNextContextPosition(LogicalDirection.Forward);
continue;
}
elementLevel--;
if (TextSchema.IsBreak(textReader.ParentType))
{
// For LineBreak, etc. use empty element syntax
xmlWriter.WriteEndElement();
}
else
{ //
// For all other textelements use explicit closing tag.
xmlWriter.WriteFullEndElement();
}
textReader.MoveToNextContextPosition(LogicalDirection.Forward);
break;
case TextPointerContext.Text:
int textLength = textReader.GetTextRunLength(LogicalDirection.Forward);
char[] text = new Char[textLength];
textLength = TextPointerBase.GetTextWithLimit(textReader, LogicalDirection.Forward, text, 0, textLength, rangeEnd);
// XmlWriter will throw an ArgumentException if text contains
// any invalid surrogates, so strip them out now.
textLength = StripInvalidSurrogateChars(text, textLength);
xmlWriter.WriteChars(text, 0, textLength);
textReader.MoveToNextContextPosition(LogicalDirection.Forward);
break;
case TextPointerContext.EmbeddedElement:
object embeddedObject = textReader.GetAdjacentElement(LogicalDirection.Forward);
textReader.MoveToNextContextPosition(LogicalDirection.Forward);
WriteEmbeddedObject(embeddedObject, xmlWriter, wpfPayload);
break;
default:
Invariant.Assert(false, "unexpected value of runType");
textReader.MoveToNextContextPosition(LogicalDirection.Forward);
break;
}
}
}
// Token: 0x06002C1F RID: 11295 RVA: 0x000C8584 File Offset: 0x000C6784
private static bool xGapAwareScan(DocumentSequenceTextPointer thisTp, int distance)
{
ChildDocumentBlock childDocumentBlock = thisTp.ChildBlock;
bool flag = true;
ITextPointer textPointer = thisTp.ChildPointer;
if (textPointer == null)
{
flag = false;
textPointer = thisTp.ChildPointer.CreatePointer();
}
LogicalDirection logicalDirection = (distance > 0) ? LogicalDirection.Forward : LogicalDirection.Backward;
distance = Math.Abs(distance);
while (distance > 0)
{
switch (textPointer.GetPointerContext(logicalDirection))
{
case TextPointerContext.None:
if ((childDocumentBlock.IsHead && logicalDirection == LogicalDirection.Backward) || (childDocumentBlock.IsTail && logicalDirection == LogicalDirection.Forward))
{
return(false);
}
childDocumentBlock = ((logicalDirection == LogicalDirection.Forward) ? childDocumentBlock.NextBlock : childDocumentBlock.PreviousBlock);
textPointer = ((logicalDirection == LogicalDirection.Forward) ? childDocumentBlock.ChildContainer.Start.CreatePointer(textPointer.LogicalDirection) : childDocumentBlock.ChildContainer.End.CreatePointer(textPointer.LogicalDirection));
break;
case TextPointerContext.Text:
{
int textRunLength = textPointer.GetTextRunLength(logicalDirection);
int num = (textRunLength < distance) ? textRunLength : distance;
distance -= num;
if (logicalDirection == LogicalDirection.Backward)
{
num *= -1;
}
textPointer.MoveByOffset(num);
break;
}
case TextPointerContext.EmbeddedElement:
textPointer.MoveToNextContextPosition(logicalDirection);
distance--;
break;
case TextPointerContext.ElementStart:
textPointer.MoveToNextContextPosition(logicalDirection);
distance--;
break;
case TextPointerContext.ElementEnd:
textPointer.MoveToNextContextPosition(logicalDirection);
distance--;
break;
}
}
thisTp.ChildBlock = childDocumentBlock;
if (flag)
{
thisTp.ChildPointer = textPointer;
}
else
{
thisTp.ChildPointer = textPointer.CreatePointer();
}
return(true);
}
// Returns true if pointer preceeds an Inline start or end edge.
private bool IsAdjacentToFormatElement(ITextPointer pointer)
{
TextPointerContext context;
bool isAdjacentToFormatElement;
isAdjacentToFormatElement = false;
context = pointer.GetPointerContext(LogicalDirection.Forward);
if (context == TextPointerContext.ElementStart &&
TextSchema.IsFormattingType(pointer.GetElementType(LogicalDirection.Forward)))
{
isAdjacentToFormatElement = true;
}
else if (context == TextPointerContext.ElementEnd &&
TextSchema.IsFormattingType(pointer.ParentType))
{
isAdjacentToFormatElement = true;
}
return isAdjacentToFormatElement;
}
private void ExpandToWordBreakAndContext(ITextPointer position, LogicalDirection direction, XmlLanguage language,
out ITextPointer contentPosition, out ITextPointer contextPosition)
{
ITextPointer start;
ITextPointer end;
ITextPointer outwardPosition;
ITextPointer inwardPosition;
TextMap textMap;
ArrayList segments;
SpellerInterop.STextRange sTextRange;
LogicalDirection inwardDirection;
int i;
contentPosition = position;
contextPosition = position;
if (position.GetPointerContext(direction) == TextPointerContext.None)
{
// There is no following context, we're at document start/end.
return;
}
// Disable spell checking functionality since we're only
// interested in word breaks here. This greatly cuts down
// the engine's workload.
_spellerInterop.SetContextOption("IsSpellChecking", false);
//
// Build an array of wordbreak offsets surrounding the position.
//
// 1. Search outward, into surrounding text. We need MinWordBreaksForContext
// word breaks to handle multi-word errors.
outwardPosition = SearchForWordBreaks(position, direction, language, MinWordBreaksForContext, true /* stopOnError */);
// 2. Search inward, towards content. We just need one word break inward.
inwardDirection = direction == LogicalDirection.Forward ? LogicalDirection.Backward : LogicalDirection.Forward;
inwardPosition = SearchForWordBreaks(position, inwardDirection, language, 1, false /* stopOnError */);
// Get combined word breaks. This may not be the same as we calculated
// in two parts above, since we don't know yet whether or not position is
// on a word break.
if (direction == LogicalDirection.Backward)
{
start = outwardPosition;
end = inwardPosition;
}
else
{
start = inwardPosition;
end = outwardPosition;
}
textMap = new TextMap(start, end, position, position);
segments = new ArrayList(MinWordBreaksForContext + 1);
_spellerInterop.EnumTextSegments(textMap.Text, textMap.TextLength, null,
new SpellerInterop.EnumTextSegmentsCallback(ExpandToWordBreakCallback), segments);
//
// Use our table of word breaks to calculate context and content positions.
//
if (segments.Count == 0)
{
// No segments. This can happen if position is surrounded by
// nothing but white space. We've already initialized contentPosition
// and contextPosition so there's nothing to do.
}
else
{
int leftWordBreak;
int rightWordBreak;
int contentOffset;
int contextOffset;
// Figure out where position lives in the segment list.
i = FindPositionInSegmentList(textMap, direction, segments, out leftWordBreak, out rightWordBreak);
// contentPosition should be an edge on the segment we found.
if (direction == LogicalDirection.Backward)
{
contentOffset = textMap.ContentStartOffset == rightWordBreak ? rightWordBreak : leftWordBreak;
}
else
{
contentOffset = textMap.ContentStartOffset == leftWordBreak ? leftWordBreak : rightWordBreak;
}
contentPosition = textMap.MapOffsetToPosition(contentOffset);
// contextPosition should be MinWordBreaksForContext - 1 words away.
if (direction == LogicalDirection.Backward)
{
i -= (MinWordBreaksForContext - 1);
sTextRange = (SpellerInterop.STextRange)segments[Math.Max(i, 0)];
// We might actually follow contentOffset if we're at the document edge.
// Don't let that happen.
contextOffset = Math.Min(sTextRange.Start, contentOffset);
}
else
{
i += MinWordBreaksForContext;
sTextRange = (SpellerInterop.STextRange)segments[Math.Min(i, segments.Count-1)];
// We might actually preceed contentOffset if we're at the document edge.
// Don't let that happen.
contextOffset = Math.Max(sTextRange.Start + sTextRange.Length, contentOffset);
}
contextPosition = textMap.MapOffsetToPosition(contextOffset);
}
// Final fixup: if the dirty range covers only formatting (which is not passed
// to the speller engine) then we might actually "expand" in the wrong
// direction, since the TextMap will jump over formatting.
// Backup if necessary.
if (direction == LogicalDirection.Backward)
{
if (position.CompareTo(contentPosition) < 0)
{
contentPosition = position;
}
if (position.CompareTo(contextPosition) < 0)
{
contextPosition = position;
}
}
else
{
if (position.CompareTo(contentPosition) > 0)
{
contentPosition = position;
}
if (position.CompareTo(contextPosition) > 0)
{
contextPosition = position;
}
}
}
// Part of plain text converter: called from GetTextInternal when processing ElementEnd for Paragraph elements.
// Outputs \n - for regular paragraphs and TableRow ends or \t for TableCell ends.
private static void PlainConvertParagraphEnd(StringBuilder textBuffer, ITextPointer navigator)
{
// Check for a special case for a single paragraph within a TableCell
// which must be serialized as "\t" character.
navigator.MoveToElementEdge(ElementEdge.BeforeStart);
bool theParagraphIsTheFirstInCollection = navigator.GetPointerContext(LogicalDirection.Backward) == TextPointerContext.ElementStart;
navigator.MoveToNextContextPosition(LogicalDirection.Forward);
navigator.MoveToElementEdge(ElementEdge.AfterEnd);
TextPointerContext symbolType = navigator.GetPointerContext(LogicalDirection.Forward);
if (theParagraphIsTheFirstInCollection && symbolType == TextPointerContext.ElementEnd &&
typeof(TableCell).IsAssignableFrom(navigator.ParentType))
{
// This is an end of a table cell
navigator.MoveToNextContextPosition(LogicalDirection.Forward);
symbolType = navigator.GetPointerContext(LogicalDirection.Forward);
if (symbolType == TextPointerContext.ElementStart)
{
// Next table cell starts after this one. Use '\t' as a cell separator
textBuffer.Append('\t');
}
else
{
// This was the last cell in a row. Use '\r\n' as a line separator
textBuffer.Append(Environment.NewLine);
}
}
else
{
// Ordinary paragraph end
textBuffer.Append(Environment.NewLine);
}
}
/// <summary>
/// Retrieves the range of a child object.
/// </summary>
/// <param name="childElementProvider">The child element. A provider should check that the
/// passed element is a child of the text container, and should throw an
/// InvalidOperationException if it is not.</param>
/// <returns>A range that spans the child element.</returns>
ITextRangeProvider ITextProvider.RangeFromChild(IRawElementProviderSimple childElementProvider)
{
if (childElementProvider == null)
{
throw new ArgumentNullException("childElementProvider");
}
// Retrieve DependencyObject from AutomationElement
DependencyObject childElement;
if (_textPeer is TextAutomationPeer)
{
childElement = ((TextAutomationPeer)_textPeer).ElementFromProvider(childElementProvider);
}
else
{
childElement = ((ContentTextAutomationPeer)_textPeer).ElementFromProvider(childElementProvider);
}
TextRangeAdaptor range = null;
if (childElement != null)
{
ITextPointer rangeStart = null;
ITextPointer rangeEnd = null;
// Retrieve start and end positions for given element.
// If element is TextElement, retrieve its Element Start and End positions.
// If element is UIElement hosted by UIContainer (Inlien of Block),
// retrieve content Start and End positions of the container.
// Otherwise scan ITextContainer to find a range for given element.
if (childElement is TextElement)
{
rangeStart = ((TextElement)childElement).ElementStart;
rangeEnd = ((TextElement)childElement).ElementEnd;
}
else
{
DependencyObject parent = LogicalTreeHelper.GetParent(childElement);
if (parent is InlineUIContainer || parent is BlockUIContainer)
{
rangeStart = ((TextElement)parent).ContentStart;
rangeEnd = ((TextElement)parent).ContentEnd;
}
else
{
ITextPointer position = _textContainer.Start.CreatePointer();
while (position.CompareTo(_textContainer.End) < 0)
{
TextPointerContext context = position.GetPointerContext(LogicalDirection.Forward);
if (context == TextPointerContext.ElementStart)
{
if (childElement == position.GetAdjacentElement(LogicalDirection.Forward))
{
rangeStart = position.CreatePointer(LogicalDirection.Forward);
position.MoveToElementEdge(ElementEdge.AfterEnd);
rangeEnd = position.CreatePointer(LogicalDirection.Backward);
break;
}
}
else if (context == TextPointerContext.EmbeddedElement)
{
if (childElement == position.GetAdjacentElement(LogicalDirection.Forward))
{
rangeStart = position.CreatePointer(LogicalDirection.Forward);
position.MoveToNextContextPosition(LogicalDirection.Forward);
rangeEnd = position.CreatePointer(LogicalDirection.Backward);
break;
}
}
position.MoveToNextContextPosition(LogicalDirection.Forward);
}
}
}
// Create range
if (rangeStart != null && rangeEnd != null)
{
range = new TextRangeAdaptor(this, rangeStart, rangeEnd, _textPeer);
}
}
if (range == null)
{
throw new InvalidOperationException(SR.Get(SRID.TextProvider_InvalidChildElement));
}
return(range);
}
// Position at row end (immediately before Row closing tag) is a valid stopper for a caret.
// Editing operations are restricted here (e.g. typing should automatically jump
// to the following character position.
// This property identifies such special position.
internal static bool IsAtRowEnd(ITextPointer thisPosition)
{
return typeof(TableRow).IsAssignableFrom(thisPosition.ParentType) &&
thisPosition.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementEnd &&
thisPosition.GetPointerContext(LogicalDirection.Backward) != TextPointerContext.ElementStart;
// Note that only non-empty TableRows are good for insertion positions.
// Totally empty TableRow is treated as any other incomplete content - not an insertion.
}
// Token: 0x060039BC RID: 14780 RVA: 0x00106178 File Offset: 0x00104378
private static int SetFindTextAndFindTextPositionMap(ITextPointer startPosition, ITextPointer endPosition, ITextPointer navigator, LogicalDirection direction, bool matchLast, char[] findText, int[] findTextPositionMap)
{
Invariant.Assert(startPosition.CompareTo(navigator) <= 0);
Invariant.Assert(endPosition.CompareTo(navigator) >= 0);
int num = 0;
int num2 = 0;
if (matchLast && num2 == 0)
{
findTextPositionMap[findTextPositionMap.Length - 1] = 0;
}
while ((matchLast ? startPosition.CompareTo(navigator) : navigator.CompareTo(endPosition)) < 0)
{
switch (navigator.GetPointerContext(direction))
{
case TextPointerContext.None:
case TextPointerContext.ElementStart:
case TextPointerContext.ElementEnd:
if (TextFindEngine.IsAdjacentToFormatElement(navigator, direction))
{
num++;
}
else if (!matchLast)
{
findText[num2] = '\n';
findTextPositionMap[num2] = num2 + num;
num2++;
}
else
{
num2++;
findText[findText.Length - num2] = '\n';
findTextPositionMap[findText.Length - num2] = num2 + num;
}
navigator.MoveToNextContextPosition(direction);
break;
case TextPointerContext.Text:
{
int num3 = navigator.GetTextRunLength(direction);
num3 = Math.Min(num3, findText.Length - num2);
if (!matchLast)
{
num3 = Math.Min(num3, navigator.GetOffsetToPosition(endPosition));
navigator.GetTextInRun(direction, findText, num2, num3);
for (int i = num2; i < num2 + num3; i++)
{
findTextPositionMap[i] = i + num;
}
}
else
{
num3 = Math.Min(num3, startPosition.GetOffsetToPosition(navigator));
navigator.GetTextInRun(direction, findText, findText.Length - num2 - num3, num3);
int num4 = findText.Length - num2 - 1;
for (int j = num2; j < num2 + num3; j++)
{
findTextPositionMap[num4--] = j + num + 1;
}
}
navigator.MoveByOffset(matchLast ? (-num3) : num3);
num2 += num3;
break;
}
case TextPointerContext.EmbeddedElement:
if (!matchLast)
{
findText[num2] = '';
findTextPositionMap[num2] = num2 + num;
num2++;
}
else
{
num2++;
findText[findText.Length - num2] = '';
findTextPositionMap[findText.Length - num2] = num2 + num;
}
navigator.MoveToNextContextPosition(direction);
break;
}
if (num2 >= findText.Length)
{
break;
}
}
if (!matchLast)
{
if (num2 > 0)
{
findTextPositionMap[num2] = findTextPositionMap[num2 - 1] + 1;
}
else
{
findTextPositionMap[0] = 0;
}
}
return(num2);
}
// Returns true if pointer is at the start of a paragraph.
internal static bool IsAtParagraphOrBlockUIContainerStart(ITextPointer pointer)
{
// Is pointer at a potential paragraph position?
if (IsAtPotentialParagraphPosition(pointer))
{
return true;
}
// Can you find a <Paragraph> start tag looking backwards?
// Loop to skip multiple formatting opening tags, never crossing parent element boundary.
while (pointer.GetPointerContext(LogicalDirection.Backward) == TextPointerContext.ElementStart)
{
if (TextSchema.IsParagraphOrBlockUIContainer(pointer.ParentType))
{
return true;
}
pointer = pointer.GetNextContextPosition(LogicalDirection.Backward);
}
return false;
}
// Tests for the presence of a non-mergeable Inline bordering a position.
// Helper for IsAtNonMergeableInlineEdge.
private static BorderingElementCategory GetBorderingElementCategory(ITextPointer position, LogicalDirection direction)
{
TextPointerContext context = (direction == LogicalDirection.Forward) ? TextPointerContext.ElementEnd : TextPointerContext.ElementStart;
BorderingElementCategory category;
if (position.GetPointerContext(direction) != context ||
!typeof(Inline).IsAssignableFrom(position.ParentType))
{
category = BorderingElementCategory.NotScopingInline;
}
else if (TextSchema.IsMergeableInline(position.ParentType))
{
category = BorderingElementCategory.MergeableScopingInline;
}
else
{
category = BorderingElementCategory.NonMergeableScopingInline;
}
return category;
}
// GetText handler for text runs.
private static bool WalkTextRun(ITextPointer navigator, ITextPointer limit, char[] text, int cchReq, ref int charsCopied, UnsafeNativeMethods.TS_RUNINFO[] runInfo, int cRunInfoReq, ref int cRunInfoRcv)
{
int runCount;
int offset;
bool hitLimit;
Invariant.Assert(navigator.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text);
Invariant.Assert(limit == null || navigator.CompareTo(limit) <= 0);
hitLimit = false;
if (cchReq > 0)
{
runCount = TextPointerBase.GetTextWithLimit(navigator, LogicalDirection.Forward, text, charsCopied, Math.Min(cchReq, text.Length - charsCopied), limit);
navigator.MoveByOffset(runCount);
charsCopied += runCount;
hitLimit = (text.Length == charsCopied) || (limit != null && navigator.CompareTo(limit) == 0);
}
else
{
// Caller doesn't want text, just run info.
// Advance the navigator.
runCount = navigator.GetTextRunLength(LogicalDirection.Forward);
navigator.MoveToNextContextPosition(LogicalDirection.Forward);
// If the caller passed in a non-null limit, backup to the limit if
// we've passed it.
if (limit != null)
{
if (navigator.CompareTo(limit) >= 0)
{
offset = limit.GetOffsetToPosition(navigator);
Invariant.Assert(offset >= 0 && offset <= runCount, "Bogus offset -- extends past run!");
runCount -= offset;
navigator.MoveToPosition(limit);
hitLimit = true;
}
}
}
if (cRunInfoReq > 0 && runCount > 0)
{
// Be sure to merge this text run with the previous run, if they are both text runs.
// (A good robustness fix would be to make cicero handle this, if we ever get the chance.)
if (cRunInfoRcv > 0 && runInfo[cRunInfoRcv - 1].type == UnsafeNativeMethods.TsRunType.TS_RT_PLAIN)
{
runInfo[cRunInfoRcv - 1].count += runCount;
}
else
{
runInfo[cRunInfoRcv].count = runCount;
runInfo[cRunInfoRcv].type = UnsafeNativeMethods.TsRunType.TS_RT_PLAIN;
cRunInfoRcv++;
}
}
return hitLimit;
}
// Tests if a position is between structural symbols where Paragraph is potentially insertable,
// but not present.
// Positions in empty list item, table cell or flow document.
internal static bool IsAtPotentialParagraphPosition(ITextPointer position)
{
Type parentType = position.ParentType;
TextPointerContext backwardContext = position.GetPointerContext(LogicalDirection.Backward);
TextPointerContext forwardContext = position.GetPointerContext(LogicalDirection.Forward);
if (backwardContext == TextPointerContext.ElementStart && forwardContext == TextPointerContext.ElementEnd)
{
return
typeof(ListItem).IsAssignableFrom(parentType) ||
typeof(TableCell).IsAssignableFrom(parentType);
}
else if (backwardContext == TextPointerContext.None && forwardContext == TextPointerContext.None)
{
return
typeof(FlowDocumentView).IsAssignableFrom(parentType) ||
typeof(FlowDocument).IsAssignableFrom(parentType);
}
return false;
}
// GetText handler for Blocks and TableCell to add '\n' or TS_CHAR_REGION.
private static bool WalkRegionBoundary(ITextPointer navigator, ITextPointer limit, char[] text, int cchReq, ref int charsCopied, UnsafeNativeMethods.TS_RUNINFO[] runInfo, int cRunInfoReq, ref int cRunInfoRcv)
{
bool hitLimit;
Invariant.Assert(navigator.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementStart || navigator.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementEnd);
Invariant.Assert(limit == null || navigator.CompareTo(limit) <= 0);
// If the caller passed in a non-null limit, we don't do anything and just return true.
// we've passed it.
if (limit != null)
{
if (navigator.CompareTo(limit) >= 0)
{
return true;
}
}
hitLimit = false;
if (cchReq > 0)
{
// Add one TS_CHAR_REGION (TableCell) or '\n' (everything else) char.
char ch = (navigator.GetAdjacentElement(LogicalDirection.Forward) is TableCell) ? UnsafeNativeMethods.TS_CHAR_REGION : '\n';
text[charsCopied] = ch;
navigator.MoveByOffset(1);
charsCopied += 1;
hitLimit = (text.Length == charsCopied) || (limit != null && navigator.CompareTo(limit) == 0);
}
else
{
// Caller doesn't want text, just run info.
// Advance the navigator.
// Add one TS_CHAR_REGION char.
navigator.MoveByOffset(1);
}
if (cRunInfoReq > 0)
{
// Be sure to merge this text run with the previous run, if they are both text runs.
// (A good robustness fix would be to make cicero handle this, if we ever get the chance.)
if (cRunInfoRcv > 0 && runInfo[cRunInfoRcv - 1].type == UnsafeNativeMethods.TsRunType.TS_RT_PLAIN)
{
runInfo[cRunInfoRcv - 1].count += 1;
}
else
{
runInfo[cRunInfoRcv].count = 1;
runInfo[cRunInfoRcv].type = UnsafeNativeMethods.TsRunType.TS_RT_PLAIN;
cRunInfoRcv++;
}
}
return hitLimit;
}
// Tests if position is before the first Table element in a collection of Blocks at that level.
// We treat this as a potential insertion position to allow editing operations before the table.
// This property identifies such a position.
internal static bool IsBeforeFirstTable(ITextPointer position)
{
TextPointerContext forwardContext = position.GetPointerContext(LogicalDirection.Forward);
TextPointerContext backwardContext = position.GetPointerContext(LogicalDirection.Backward);
return (forwardContext == TextPointerContext.ElementStart &&
(backwardContext == TextPointerContext.ElementStart || backwardContext == TextPointerContext.None) &&
typeof(Table).IsAssignableFrom(position.GetElementType(LogicalDirection.Forward)));
}
// Normalizes a range:
//
// -The start position is advanced over all element edges not visible
// to the IMEs.
// -Start and end positions are moved to insertion positions.
private void GetNormalizedRange(int startCharOffset, int endCharOffset, out ITextPointer start, out ITextPointer end)
{
start = CreatePointerAtCharOffset(startCharOffset, LogicalDirection.Forward);
end = (startCharOffset == endCharOffset) ? start : CreatePointerAtCharOffset(endCharOffset, LogicalDirection.Backward);
// Skip over hidden element edges.
while (start.CompareTo(end) < 0)
{
TextPointerContext forwardContext = start.GetPointerContext(LogicalDirection.Forward);
if (forwardContext == TextPointerContext.ElementStart)
{
TextElement element = start.GetAdjacentElement(LogicalDirection.Forward) as TextElement;
if (element == null)
break;
if (element.IMELeftEdgeCharCount != 0)
break;
}
else if (forwardContext != TextPointerContext.ElementEnd)
{
break;
}
start.MoveToNextContextPosition(LogicalDirection.Forward);
}
// Move to insertion positions.
// If the positions are already adjacent to text, we must respect
// the IME's decision in regards to exact placement.
// MoveToInsertionPosition will skip over surrogates and combining
// marks, but the IME needs fine-grained control over these positions.
if (start.CompareTo(end) == 0)
{
start = start.GetFormatNormalizedPosition(LogicalDirection.Backward);
end = start;
}
else
{
start = start.GetFormatNormalizedPosition(LogicalDirection.Backward);
end = end.GetFormatNormalizedPosition(LogicalDirection.Backward);
}
}
internal static bool IsAtBlockUIContainerStart(ITextPointer position)
{
return IsInBlockUIContainer(position) &&
position.GetPointerContext(LogicalDirection.Backward) == TextPointerContext.ElementStart;
}
//......................................................
//
// Selection Building With Mouse
//
//......................................................
// Moves the selection to the mouse cursor position.
// If the cursor is facing a UIElement, select the UIElement.
// Sets new selection anchor to a given cursorPosition.
private void MoveSelectionByMouse(ITextPointer cursorPosition, Point cursorMousePoint)
{
ITextSelection thisSelection = (ITextSelection)this;
if (this.TextView == null)
{
return;
}
Invariant.Assert(this.TextView.IsValid); // We just checked RenderScope. We'll use TextView below
ITextPointer movingPosition = null;
if (cursorPosition.GetPointerContext(cursorPosition.LogicalDirection) == TextPointerContext.EmbeddedElement)
{
Rect objectEdgeRect = this.TextView.GetRectangleFromTextPosition(cursorPosition);
// Check for embedded object.
// If the click happend inside of it we need to select it as a whole, when content is not read-only.
if (!_textEditor.IsReadOnly && ShouldSelectEmbeddedObject(cursorPosition, cursorMousePoint, objectEdgeRect))
{
movingPosition = cursorPosition.GetNextContextPosition(cursorPosition.LogicalDirection);
}
}
// Move selection to this position
if (movingPosition == null)
{
thisSelection.SetCaretToPosition(cursorPosition, cursorPosition.LogicalDirection, /*allowStopAtLineEnd:*/true, /*allowStopNearSpace:*/false);
}
else
{
thisSelection.Select(cursorPosition, movingPosition);
}
}
internal static bool IsAtBlockUIContainerEnd(ITextPointer position)
{
return IsInBlockUIContainer(position) &&
position.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementEnd;
}
// Worker implementing IsAtPotentialRunPosition(position) method.
// It is used for testing whether an empty Run element is at potential run potision.
// For this purpose the method is supposed to be called with
// backwardPosition==run.ElementStart and forwardPosition==run.ElementEnd.
private static bool IsAtPotentialRunPosition(ITextPointer backwardPosition, ITextPointer forwardPosition)
{
Invariant.Assert(backwardPosition.HasEqualScope(forwardPosition));
if (TextSchema.IsValidChild(/*position*/backwardPosition, /*childType*/typeof(Run)))
{
Type forwardType = forwardPosition.GetElementType(LogicalDirection.Forward);
Type backwardType = backwardPosition.GetElementType(LogicalDirection.Backward);
if (forwardType != null && backwardType != null)
{
TextPointerContext forwardContext = forwardPosition.GetPointerContext(LogicalDirection.Forward);
TextPointerContext backwardContext = backwardPosition.GetPointerContext(LogicalDirection.Backward);
if (// Test if the position inside empty Paragraph or Span
backwardContext == TextPointerContext.ElementStart &&
forwardContext == TextPointerContext.ElementEnd
||
// Test if the position between opening tag and an embedded object
backwardContext == TextPointerContext.ElementStart && TextSchema.IsNonFormattingInline(forwardType) &&
!IsAtNonMergeableInlineStart(backwardPosition)
||
// Test if the position between an embedded object and a closing tag
forwardContext == TextPointerContext.ElementEnd && TextSchema.IsNonFormattingInline(backwardType) &&
!IsAtNonMergeableInlineEnd(forwardPosition)
||
// Test if the position between two embedded objects
backwardContext == TextPointerContext.ElementEnd && forwardContext == TextPointerContext.ElementStart &&
TextSchema.IsNonFormattingInline(backwardType) && TextSchema.IsNonFormattingInline(forwardType)
||
// Test if the position is adjacent to a non-mergeable inline (Hyperlink).
backwardContext == TextPointerContext.ElementEnd &&
typeof(Inline).IsAssignableFrom(backwardType) && !TextSchema.IsMergeableInline(backwardType) && !typeof(Run).IsAssignableFrom(forwardType) &&
(forwardContext != TextPointerContext.ElementEnd || !IsAtNonMergeableInlineEnd(forwardPosition))
||
forwardContext == TextPointerContext.ElementStart &&
typeof(Inline).IsAssignableFrom(forwardType) && !TextSchema.IsMergeableInline(forwardType) && !typeof(Run).IsAssignableFrom(backwardType) &&
(backwardContext != TextPointerContext.ElementStart || !IsAtNonMergeableInlineStart(backwardPosition))
)
{
return true;
}
}
}
return false;
}
/// <summary>
/// Determine paragraph type at the current TextPointer and
/// create it. Only ListItem elements are considered. Any other
/// content is skipped.
/// </summary>
/// <param name="textPointer">
/// TextPointer at which paragraph is to be created
/// </param>
/// <param name="fEmptyOk">
/// True if empty paragraph is acceptable
/// </param>
/// <returns>
/// BaseParagraph that was created
/// </returns>
protected override BaseParagraph GetParagraph(ITextPointer textPointer, bool fEmptyOk)
{
Invariant.Assert(textPointer is TextPointer);
BaseParagraph paragraph = null;
while (paragraph == null)
{
TextPointerContext runType = textPointer.GetPointerContext(LogicalDirection.Forward);
if (runType == TextPointerContext.ElementStart)
{
TextElement element = ((TextPointer)textPointer).GetAdjacentElementFromOuterPosition(LogicalDirection.Forward);
if (element is ListItem)
{
// Need to handle visibility collapsed.
//Visibility visibility = Retriever.Visibility(treePtr.CPPtr.Element);
//if (visibility != Visibility.Collapsed)
//{
// para = new
//}
//else skip the element
paragraph = new ListItemParagraph(element, StructuralCache);
break;
}
else if (element is List)
{
// Need to handle visibility collapsed.
//Visibility visibility = Retriever.Visibility(treePtr.CPPtr.Element);
//if (visibility != Visibility.Collapsed)
//{
// para = new
//}
//else skip the element
paragraph = new ListParagraph(element, StructuralCache);
break;
}
// Skip all elements, which are not valid list item children
if (((TextPointer)textPointer).IsFrozen)
{
// Need to clone TextPointer before moving it.
textPointer = textPointer.CreatePointer();
}
textPointer.MoveToPosition(element.ElementEnd);
}
else if (runType == TextPointerContext.ElementEnd)
{
// End of list, if the same as Owner of associated element
// Skip content otherwise
if (Element == ((TextPointer)textPointer).Parent)
{
break;
}
if (((TextPointer)textPointer).IsFrozen)
{
// Need to clone TextPointer before moving it.
textPointer = textPointer.CreatePointer();
}
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
}
else
{
// Skip content
if (((TextPointer)textPointer).IsFrozen)
{
// Need to clone TextPointer before moving it.
textPointer = textPointer.CreatePointer();
}
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
}
}
if (paragraph != null)
{
StructuralCache.CurrentFormatContext.DependentMax = (TextPointer)textPointer;
}
return(paragraph);
}
/// <summary>
/// Set the find text content from reading the text on the current text position.
/// </summary>
/// <returns>
/// Returns the number of characters actually loaded into the findText array.
/// </returns>
private static int SetFindTextAndFindTextPositionMap(
ITextPointer startPosition,
ITextPointer endPosition,
ITextPointer navigator,
LogicalDirection direction,
bool matchLast,
char[] findText,
int[] findTextPositionMap)
{
Invariant.Assert(startPosition.CompareTo(navigator) <= 0);
Invariant.Assert(endPosition.CompareTo(navigator) >= 0);
int runCount;
int inlineCount = 0;
int findTextLength = 0;
// Set the first offset which is zero on TextBufferSize + 1 location of
// the text position map in case of the backward searching
if (matchLast && findTextLength == 0)
{
findTextPositionMap[findTextPositionMap.Length - 1] = 0;
}
while ((matchLast ? startPosition.CompareTo(navigator) : navigator.CompareTo(endPosition)) < 0)
{
switch (navigator.GetPointerContext(direction))
{
case TextPointerContext.Text:
runCount = navigator.GetTextRunLength(direction);
runCount = Math.Min(runCount, findText.Length - findTextLength);
if (!matchLast)
{
runCount = Math.Min(runCount, navigator.GetOffsetToPosition(endPosition));
navigator.GetTextInRun(direction, findText, findTextLength, runCount);
for (int i = findTextLength; i < findTextLength + runCount; i++)
{
findTextPositionMap[i] = i + inlineCount;
}
}
else
{
runCount = Math.Min(runCount, startPosition.GetOffsetToPosition(navigator));
navigator.GetTextInRun(
direction,
findText,
findText.Length - findTextLength - runCount,
runCount);
// Set the text offest for the amount of runCount from the last index
// of text position map
int mapIndex = findText.Length - findTextLength - 1;
for (int i = findTextLength; i < findTextLength + runCount; i++)
{
findTextPositionMap[mapIndex--] = i + inlineCount + 1;
}
}
// Move the navigator position for the amount of runCount
navigator.MoveByOffset(matchLast ? -runCount : runCount);
findTextLength += runCount;
break;
case TextPointerContext.None:
case TextPointerContext.ElementStart:
case TextPointerContext.ElementEnd:
if (IsAdjacentToFormatElement(navigator, direction))
{
// Filter out formatting tags since find text content is plain.
inlineCount++;
}
else
{
if (!matchLast)
{
// Stick in a line break to account for the block element.
findText[findTextLength] = '\n';
findTextPositionMap[findTextLength] = findTextLength + inlineCount;
findTextLength++;
}
else
{
// Increse the find text length first since adding text and map reversely
findTextLength++;
// Stick in a line break to account for the block element and
// add text offset on the last index of text position map
findText[findText.Length - findTextLength] = '\n';
findTextPositionMap[findText.Length - findTextLength] = findTextLength + inlineCount;
}
}
navigator.MoveToNextContextPosition(direction);
break;
case TextPointerContext.EmbeddedElement:
if (!matchLast)
{
findText[findTextLength] = '\xf8ff'; // Unicode private use.
findTextPositionMap[findTextLength] = findTextLength + inlineCount;
findTextLength++;
}
else
{
// Increse the find text length first since adding text and map reversely
findTextLength++;
// Set the private unicode value and text offset
findText[findText.Length - findTextLength] = '\xf8ff';
findTextPositionMap[findText.Length - findTextLength] = findTextLength + inlineCount;
}
navigator.MoveToNextContextPosition(direction);
break;
}
if (findTextLength >= findText.Length)
{
break;
}
}
// Complete the adding the find text position to the position map for only the forward finding.
// The backward finding(matchLast) is already added initially as the zero offset at the end of
// text position map.
if (!matchLast)
{
if (findTextLength > 0)
{
findTextPositionMap[findTextLength] = findTextPositionMap[findTextLength - 1] + 1;
}
else
{
findTextPositionMap[0] = 0;
}
}
return(findTextLength);
}
/// <summary>
/// Retrieves the height and offset, in pixels, of the edge of
/// the object/character represented by position.
/// </summary>
/// <param name="position">
/// Position of an object/character.
/// </param>
/// <param name="transform">
/// Transform to be applied to returned rect
/// </param>
/// <returns>
/// The height, in pixels, of the edge of the object/character
/// represented by position.
/// </returns>
/// <exception cref="System.InvalidOperationException">
/// Throws InvalidOperationException if IsValid is false.
/// If IsValid returns false, Validate method must be called before
/// calling this method.
/// </exception>
/// <remarks>
/// Rect.Width is always 0.
/// Output parameter Transform is always Identity. It is not expected that editing scenarios
/// will require speparate transform with raw rectangle for this case.
/// If the document is empty, then this method returns the expected
/// height of a character, if placed at the specified position.
/// </remarks>
internal override Rect GetRawRectangleFromTextPosition(ITextPointer position, out Transform transform)
{
#if DEBUG
DocumentsTrace.FixedTextOM.TextView.Trace(string.Format("GetRectFromTextPosition {0}, {1}", (FixedTextPointer)position, position.LogicalDirection));
#endif
FixedTextPointer ftp = Container.VerifyPosition(position);
FixedPosition fixedp;
// need a default caret size, otherwise infinite corners cause text editor and MultiPageTextView problems.
// Initialize transform to Identity. This function always returns Identity transform.
Rect designRect = new Rect(0, 0, 0, 10);
transform = Transform.Identity;
Debug.Assert(ftp != null);
if (ftp.FlowPosition.IsBoundary)
{
if (!_GetFirstFixedPosition(ftp, out fixedp))
{
return designRect;
}
}
else if (!_GetFixedPosition(ftp, out fixedp))
{
//
// This is the start/end element, we need to find out the next element and return the next element
// start offset/height.
//
if (position.GetPointerContext(LogicalDirection.Forward) != TextPointerContext.None)
{
ITextPointer psNext = position.CreatePointer(1);
FixedTextPointer ftpNext = Container.VerifyPosition(psNext);
if (!_GetFixedPosition(ftpNext, out fixedp))
{
return designRect;
}
}
else
{
return designRect;
}
}
if (fixedp.Page != this.PageIndex)
{
return designRect;
}
DependencyObject element = this.FixedPage.GetElement(fixedp.Node);
if (element is Glyphs)
{
Glyphs g = (Glyphs)element;
designRect = _GetGlyphRunDesignRect(g, fixedp.Offset, fixedp.Offset);
// need to do transform
GeneralTransform tran = g.TransformToAncestor(this.FixedPage);
designRect = _GetTransformedCaretRect(tran, designRect.TopLeft, designRect.Height);
}
else if (element is Image)
{
Image image = (Image)element;
GeneralTransform tran = image.TransformToAncestor(this.FixedPage);
Point offset = new Point(0, 0);
if (fixedp.Offset > 0)
{
offset.X += image.ActualWidth;
}
designRect = _GetTransformedCaretRect(tran, offset, image.ActualHeight);
}
else if (element is Path)
{
Path path = (Path)element;
GeneralTransform tran = path.TransformToAncestor(this.FixedPage);
Rect bounds = path.Data.Bounds;
Point offset = bounds.TopLeft;
if (fixedp.Offset > 0)
{
offset.X += bounds.Width;
}
designRect = _GetTransformedCaretRect(tran, offset, bounds.Height);
}
return designRect;
}
/// <summary>
/// Return true if Hyperlink range is invalid.
/// Hyperlink is invalid if it include a UiElement except Image or the range end position
/// is stated before the end position of hyperlink.
/// This must be called before Hyperlink start element position.
/// </summary>
private static bool IsHyperlinkInvalid(ITextPointer textReader, ITextPointer rangeEnd)
{
// TextRead must be on the position before the element start position of Hyperlink
Invariant.Assert(textReader.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementStart);
Invariant.Assert(typeof(Hyperlink).IsAssignableFrom(textReader.GetElementType(LogicalDirection.Forward)));
bool hyperlinkInvalid = false;
// Get the forward adjacent element and cast Hyperlink hardly since it must be Hyperlink
Hyperlink hyperlink = (Hyperlink)textReader.GetAdjacentElement(LogicalDirection.Forward);
ITextPointer hyperlinkNavigation = textReader.CreatePointer();
ITextPointer hyperlinkEnd = textReader.CreatePointer();
hyperlinkEnd.MoveToNextContextPosition(LogicalDirection.Forward);
// Find the hyperlink end position
hyperlinkEnd.MoveToElementEdge(ElementEdge.AfterEnd);
// Hyperlink end position is stated after the range end position.
if (hyperlinkEnd.CompareTo(rangeEnd) > 0)
{
hyperlinkInvalid = true;
}
else
{
// Check whether the hyperlink having a UiElement except Image until hyperlink end position
while (hyperlinkNavigation.CompareTo(hyperlinkEnd) < 0)
{
InlineUIContainer inlineUIContainer = hyperlinkNavigation.GetAdjacentElement(LogicalDirection.Forward) as InlineUIContainer;
if (inlineUIContainer != null && !(inlineUIContainer.Child is Image))
{
hyperlinkInvalid = true;
break;
}
hyperlinkNavigation.MoveToNextContextPosition(LogicalDirection.Forward);
}
}
return hyperlinkInvalid;
}
/// <summary>
/// Determine paragraph type at the current TextPointer and
/// create it. Only ListItem elements are considered. Any other
/// content is skipped.
/// </summary>
/// <param name="textPointer">
/// TextPointer at which paragraph is to be created
/// </param>
/// <param name="fEmptyOk">
/// True if empty paragraph is acceptable
/// </param>
/// <returns>
/// BaseParagraph that was created
/// </returns>
protected override BaseParagraph GetParagraph(ITextPointer textPointer, bool fEmptyOk)
{
Invariant.Assert(textPointer is TextPointer);
BaseParagraph paragraph = null;
while (paragraph == null)
{
TextPointerContext runType = textPointer.GetPointerContext(LogicalDirection.Forward);
if (runType == TextPointerContext.ElementStart)
{
TextElement element = ((TextPointer)textPointer).GetAdjacentElementFromOuterPosition(LogicalDirection.Forward);
if (element is ListItem)
{
//
paragraph = new ListItemParagraph(element, StructuralCache);
break;
}
else if (element is List)
{
//
paragraph = new ListParagraph(element, StructuralCache);
break;
}
// Skip all elements, which are not valid list item children
if (((TextPointer)textPointer).IsFrozen)
{
// Need to clone TextPointer before moving it.
textPointer = textPointer.CreatePointer();
}
textPointer.MoveToPosition(element.ElementEnd);
}
else if (runType == TextPointerContext.ElementEnd)
{
// End of list, if the same as Owner of associated element
// Skip content otherwise
if (Element == ((TextPointer)textPointer).Parent)
{
break;
}
if (((TextPointer)textPointer).IsFrozen)
{
// Need to clone TextPointer before moving it.
textPointer = textPointer.CreatePointer();
}
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
}
else
{
// Skip content
if (((TextPointer)textPointer).IsFrozen)
{
// Need to clone TextPointer before moving it.
textPointer = textPointer.CreatePointer();
}
textPointer.MoveToNextContextPosition(LogicalDirection.Forward);
}
}
if (paragraph != null)
{
StructuralCache.CurrentFormatContext.DependentMax = (TextPointer)textPointer;
}
return paragraph;
}
// Move this TP by distance, and respect virtualization of child TextContainer
// Return true if distance is within boundary of the aggregated container, false otherwise
private static bool xGapAwareScan(DocumentSequenceTextPointer thisTp, int distance)
{
//
// Note: To calculate distance between thisTp.ChildPointer to
// it container Start/End position would have been devastating
// for those who implemented vitualization.
// Ideally we would need a new API on ITextPointer
// ITextPointer.IsDistanceOutOfRange
ChildDocumentBlock cdb = thisTp.ChildBlock;
bool isNavigator = true;
ITextPointer childTn = thisTp.ChildPointer;
if (childTn == null)
{
isNavigator = false;
childTn = thisTp.ChildPointer.CreatePointer();
}
LogicalDirection scanDir = (distance > 0 ? LogicalDirection.Forward : LogicalDirection.Backward);
distance = Math.Abs(distance);
while (distance > 0)
{
TextPointerContext tst = childTn.GetPointerContext(scanDir);
switch (tst)
{
case TextPointerContext.ElementStart:
childTn.MoveToNextContextPosition(scanDir);
distance--;
break;
case TextPointerContext.ElementEnd:
childTn.MoveToNextContextPosition(scanDir);
distance--;
break;
case TextPointerContext.EmbeddedElement:
childTn.MoveToNextContextPosition(scanDir);
distance--;
break;
case TextPointerContext.Text:
int runLength = childTn.GetTextRunLength(scanDir);
int moveLength = runLength < distance ? runLength : distance;
distance -= moveLength;
//agurcan: Fix for 1098225
//We need to propagate direction info to MoveByOffset
if (scanDir == LogicalDirection.Backward)
{
moveLength *= -1;
}
childTn.MoveByOffset(moveLength);
break;
case TextPointerContext.None:
if (!((cdb.IsHead && scanDir == LogicalDirection.Backward) ||
(cdb.IsTail && scanDir == LogicalDirection.Forward)
)
)
{
cdb = (scanDir == LogicalDirection.Forward ? cdb.NextBlock : cdb.PreviousBlock);
childTn = (scanDir == LogicalDirection.Forward ?
cdb.ChildContainer.Start.CreatePointer(childTn.LogicalDirection)
: cdb.ChildContainer.End.CreatePointer(childTn.LogicalDirection)
);
}
else
{
return(false);
}
break;
default:
Debug.Assert(false, "invalid TextPointerContext");
break;
}
}
// Re-position thisTp to the new location.
thisTp.ChildBlock = cdb;
if (isNavigator)
{
thisTp.ChildPointer = childTn;
}
else
{
thisTp.ChildPointer = childTn.CreatePointer();
}
return(true);
}
//------------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
#region Private Methods
// Worker for MoveToNextFormatNormalizedPosition/MoveToNextInsertionPosition.
private static bool NormalizePosition(ITextPointer thisNavigator, LogicalDirection direction, bool respectCaretUnitBoundaries)
{
Invariant.Assert(!thisNavigator.IsFrozen, "Can't reposition a frozen pointer!");
int symbolCount = 0;
int increment;
LogicalDirection oppositeDirection;
TextPointerContext directEnterScope;
TextPointerContext oppositeEnterScope;
if (direction == LogicalDirection.Forward)
{
increment = +1;
oppositeDirection = LogicalDirection.Backward;
directEnterScope = TextPointerContext.ElementStart;
oppositeEnterScope = TextPointerContext.ElementEnd;
}
else
{
increment = -1;
oppositeDirection = LogicalDirection.Forward;
directEnterScope = TextPointerContext.ElementEnd;
oppositeEnterScope = TextPointerContext.ElementStart;
}
// When the pointer appears in between structural tags we need to start
// from sliding into the deepest possible position without
// leaving any structural units. We need to do that only
// if we are not at insertion position already.
if (!IsAtNormalizedPosition(thisNavigator, respectCaretUnitBoundaries))
{
// Go inside an innermost structured element (non-inline)
while (
thisNavigator.GetPointerContext(direction) == directEnterScope &&
!typeof(Inline).IsAssignableFrom(thisNavigator.GetElementType(direction)) &&
!IsAtNormalizedPosition(thisNavigator, respectCaretUnitBoundaries))
{
thisNavigator.MoveToNextContextPosition(direction);
symbolCount += increment;
}
while (
thisNavigator.GetPointerContext(oppositeDirection) == oppositeEnterScope &&
!typeof(Inline).IsAssignableFrom(thisNavigator.GetElementType(oppositeDirection)) &&
!IsAtNormalizedPosition(thisNavigator, respectCaretUnitBoundaries))
{
thisNavigator.MoveToNextContextPosition(oppositeDirection);
symbolCount -= increment;
}
}
// Get out of a Hyperlink, etc. inner edge.
symbolCount = LeaveNonMergeableInlineBoundary(thisNavigator, direction, symbolCount);
// Get out of a compound sequence if any.
if (respectCaretUnitBoundaries)
{
while (!IsAtCaretUnitBoundary(thisNavigator))
{
symbolCount += increment;
thisNavigator.MoveByOffset(increment);
}
}
// Here is the core part of this method's logic - skipping all formatting tags in the given direction.
// Skip character formatting tags if they are present in this direction.
// Even if an insertion position can be in the middle of this formatting sequence,
// we want to skip it all and reach the farthest possible insertion position in that direction.
// Such approach guarantees that repeated calls of this normalization will give the same reauls.
// In case if there is an inserrtion position in the middle (say, in empty Run),
// the loop moving in opposite direction below will find it if needed.
while (TextSchema.IsMergeableInline(thisNavigator.GetElementType(direction)))
{
thisNavigator.MoveToNextContextPosition(direction);
symbolCount += increment;
}
if (!IsAtNormalizedPosition(thisNavigator, respectCaretUnitBoundaries))
{
// If still not at insertion point, try skipping inline tags in the opposite direction
// now possibly stopping inside of empty element
while (!IsAtNormalizedPosition(thisNavigator, respectCaretUnitBoundaries) &&
TextSchema.IsMergeableInline(thisNavigator.GetElementType(oppositeDirection)))
{
thisNavigator.MoveToNextContextPosition(oppositeDirection);
symbolCount -= increment;
}
// If still not at insertion point, then try harder - skipping block tags
// First in "preferred" direction
while (!IsAtNormalizedPosition(thisNavigator, respectCaretUnitBoundaries) &&
thisNavigator.MoveToNextContextPosition(direction))
{
symbolCount += increment;
}
// And finally in apposite direction
while (!IsAtNormalizedPosition(thisNavigator, respectCaretUnitBoundaries) &&
thisNavigator.MoveToNextContextPosition(oppositeDirection))
{
symbolCount -= increment;
}
if (!IsAtNormalizedPosition(thisNavigator, respectCaretUnitBoundaries))
{
// When there is no insertion positions in the whole document
// we return the position back to its original place.
thisNavigator.MoveByOffset(-symbolCount);
}
}
return symbolCount != 0;
}
/// <summary>
/// Retrieves the height and offset, in pixels, of the edge of
/// the object/character represented by position.
/// </summary>
/// <param name="position">
/// Position of an object/character.
/// </param>
/// <param name="transform">
/// Transform to be applied to returned rect
/// </param>
/// <returns>
/// The height, in pixels, of the edge of the object/character
/// represented by position.
/// </returns>
/// <exception cref="System.InvalidOperationException">
/// Throws InvalidOperationException if IsValid is false.
/// If IsValid returns false, Validate method must be called before
/// calling this method.
/// </exception>
/// <remarks>
/// Rect.Width is always 0.
/// Output parameter Transform is always Identity. It is not expected that editing scenarios
/// will require speparate transform with raw rectangle for this case.
/// If the document is empty, then this method returns the expected
/// height of a character, if placed at the specified position.
/// </remarks>
internal override Rect GetRawRectangleFromTextPosition(ITextPointer position, out Transform transform)
{
#if DEBUG
DocumentsTrace.FixedTextOM.TextView.Trace(string.Format("GetRectFromTextPosition {0}, {1}", (FixedTextPointer)position, position.LogicalDirection));
#endif
FixedTextPointer ftp = Container.VerifyPosition(position);
FixedPosition fixedp;
// need a default caret size, otherwise infinite corners cause text editor and MultiPageTextView problems.
// Initialize transform to Identity. This function always returns Identity transform.
Rect designRect = new Rect(0, 0, 0, 10);
transform = Transform.Identity;
Debug.Assert(ftp != null);
if (ftp.FlowPosition.IsBoundary)
{
if (!_GetFirstFixedPosition(ftp, out fixedp))
{
return(designRect);
}
}
else if (!_GetFixedPosition(ftp, out fixedp))
{
//
// This is the start/end element, we need to find out the next element and return the next element
// start offset/height.
//
if (position.GetPointerContext(LogicalDirection.Forward) != TextPointerContext.None)
{
ITextPointer psNext = position.CreatePointer(1);
FixedTextPointer ftpNext = Container.VerifyPosition(psNext);
if (!_GetFixedPosition(ftpNext, out fixedp))
{
return(designRect);
}
}
else
{
return(designRect);
}
}
if (fixedp.Page != this.PageIndex)
{
return(designRect);
}
DependencyObject element = this.FixedPage.GetElement(fixedp.Node);
if (element is Glyphs)
{
Glyphs g = (Glyphs)element;
designRect = _GetGlyphRunDesignRect(g, fixedp.Offset, fixedp.Offset);
// need to do transform
GeneralTransform tran = g.TransformToAncestor(this.FixedPage);
designRect = _GetTransformedCaretRect(tran, designRect.TopLeft, designRect.Height);
}
else if (element is Image)
{
Image image = (Image)element;
GeneralTransform tran = image.TransformToAncestor(this.FixedPage);
Point offset = new Point(0, 0);
if (fixedp.Offset > 0)
{
offset.X += image.ActualWidth;
}
designRect = _GetTransformedCaretRect(tran, offset, image.ActualHeight);
}
else if (element is Path)
{
Path path = (Path)element;
GeneralTransform tran = path.TransformToAncestor(this.FixedPage);
Rect bounds = path.Data.Bounds;
Point offset = bounds.TopLeft;
if (fixedp.Offset > 0)
{
offset.X += bounds.Width;
}
designRect = _GetTransformedCaretRect(tran, offset, bounds.Height);
}
return(designRect);
}
// Returns true if the position is on the caret unit boundary.
// Call TextView's IsAtCaretUnitBoundary if TextView is valid for this position
// and it appears strictly within text run.
// We consider all markup-boundary positions as caret unit boundaries.
// If TextView information is not available call IsInsideCompoundSequence.
private static bool IsAtCaretUnitBoundary(ITextPointer position)
{
bool isAtCaretUnitBoundary;
TextPointerContext forwardContext = position.GetPointerContext(LogicalDirection.Forward);
TextPointerContext backwardContext = position.GetPointerContext(LogicalDirection.Backward);
if (backwardContext == TextPointerContext.Text && forwardContext == TextPointerContext.Text)
{
if (position.HasValidLayout)
{
// Check the insertion position with TextView's IsAtCaretUnitBoundary
// that will acurately check the caret unit bounday for surrogate and international
// characters
isAtCaretUnitBoundary = position.IsAtCaretUnitBoundary;
}
else
{
// Check the insertion position with the internal compound sequence
isAtCaretUnitBoundary = !IsInsideCompoundSequence(position);
}
}
else
{
isAtCaretUnitBoundary = true;
}
return isAtCaretUnitBoundary;
}
