// Token: 0x06003D0D RID: 15629 RVA: 0x0011B8BC File Offset: 0x00119ABC
internal TextTreeDeleteContentUndoUnit(TextContainer tree, TextPointer start, TextPointer end) : base(tree, start.GetSymbolOffset())
{
start.DebugAssertGeneration();
end.DebugAssertGeneration();
Invariant.Assert(start.GetScopingNode() == end.GetScopingNode(), "start/end have different scope!");
TextTreeNode adjacentNode = start.GetAdjacentNode(LogicalDirection.Forward);
TextTreeNode adjacentNode2 = end.GetAdjacentNode(LogicalDirection.Forward);
this._content = this.CopyContent(adjacentNode, adjacentNode2);
}
//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
// Creates a new instance.
// start/end span the content to copy into the new undo unit -- they
// should always share the same scoping TextElement.
internal TextTreeDeleteContentUndoUnit(TextContainer tree, TextPointer start, TextPointer end) : base(tree, start.GetSymbolOffset())
{
TextTreeNode node;
TextTreeNode haltNode;
start.DebugAssertGeneration();
end.DebugAssertGeneration();
Invariant.Assert(start.GetScopingNode() == end.GetScopingNode(), "start/end have different scope!");
node = start.GetAdjacentNode(LogicalDirection.Forward);
haltNode = end.GetAdjacentNode(LogicalDirection.Forward);
// Walk the content, copying runs as we go.
_content = CopyContent(node, haltNode);
}
//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
// Creates a new instance.
// start/end span the content to copy into the new undo unit -- they
// should always share the same scoping TextElement.
internal TextTreeDeleteContentUndoUnit(TextContainer tree, TextPointer start, TextPointer end) : base(tree, start.GetSymbolOffset())
{
TextTreeNode node;
TextTreeNode haltNode;
start.DebugAssertGeneration();
end.DebugAssertGeneration();
Invariant.Assert(start.GetScopingNode() == end.GetScopingNode(), "start/end have different scope!");
node = start.GetAdjacentNode(LogicalDirection.Forward);
haltNode = end.GetAdjacentNode(LogicalDirection.Forward);
// Walk the content, copying runs as we go.
_content = CopyContent(node, haltNode);
}
// Wrapper for this.TextView.IsAtCaretUnitBoundary, adds a cache.
internal bool IsAtCaretUnitBoundary(TextPointer position)
{
position.DebugAssertGeneration();
Invariant.Assert(position.HasValidLayout);
if (_rootNode.CaretUnitBoundaryCacheOffset != position.GetSymbolOffset())
{
_rootNode.CaretUnitBoundaryCacheOffset = position.GetSymbolOffset();
_rootNode.CaretUnitBoundaryCache = _textview.IsAtCaretUnitBoundary(position);
if (!_rootNode.CaretUnitBoundaryCache && position.LogicalDirection == LogicalDirection.Backward)
{
// In MIL Text and TextView worlds, a position at trailing edge of a newline (with backward gravity)
// is not an allowed caret stop.
// However, in TextPointer world we must allow such a position to be a valid insertion position,
// since it breaks textrange normalization for empty ranges.
// Hence, we need to check for TextView.IsAtCaretUnitBoundary in reverse direction here.
TextPointer positionForwardGravity = position.GetPositionAtOffset(0, LogicalDirection.Forward);
_rootNode.CaretUnitBoundaryCache = _textview.IsAtCaretUnitBoundary(positionForwardGravity);
}
}
return _rootNode.CaretUnitBoundaryCache;
}
