/// <summary>
/// Calculates a TextPointer indended for dropping the text.
/// </summary>
/// <param name="target"></param>
/// <param name="point"></param>
/// <returns>
/// ITextPointer intended for dropping the selected text.
/// Adjusts the dropping point to a word boundary (beginning of word)
/// in case if source range contains whole words.
/// The position returned is oriented towards a character
/// under the mouse pointer.
/// </returns>
private ITextPointer GetDropPosition(Visual target, Point point)
{
Invariant.Assert(target != null);
Invariant.Assert(_textEditor.TextView.IsValid); // caller must guarantee this.
// Convert point to RenderScope
if (target != _textEditor.TextView.RenderScope && target != null && (_textEditor.TextView.RenderScope).IsAncestorOf(target))
{
GeneralTransform transform = target.TransformToAncestor(_textEditor.TextView.RenderScope);
transform.TryTransform(point, out point);
}
ITextPointer dropPosition = this.TextView.GetTextPositionFromPoint(point, /*snapToText:*/ true);
// For rich text content we adjust drop position to word boundary
if (dropPosition != null)
{
// Normalize drop position
dropPosition = dropPosition.GetInsertionPosition(dropPosition.LogicalDirection);
if (_textEditor.AcceptsRichContent)
{
TextSegment lineRange = TextEditorSelection.GetNormalizedLineRange(this.TextView, dropPosition);
if (!lineRange.IsNull &&
// The drop position must be before of end of line
dropPosition.CompareTo(lineRange.End) < 0 &&
// We check if we are not at word boundary already:
!TextPointerBase.IsAtWordBoundary(dropPosition, /*insideWordDirection:*/ LogicalDirection.Forward) &&
// We do not do it if the source range was not on word boundaries from both ends
_dragSourceTextRange != null && //
TextPointerBase.IsAtWordBoundary(_dragSourceTextRange.Start, LogicalDirection.Forward) && //
TextPointerBase.IsAtWordBoundary(_dragSourceTextRange.End, LogicalDirection.Forward))
{
// Move to word boundary. Select closest one to a dropPosition.
TextSegment wordSegment = TextPointerBase.GetWordRange(dropPosition);
string wordText = TextRangeBase.GetTextInternal(wordSegment.Start, wordSegment.End);
int indexInWord = wordSegment.Start.GetOffsetToPosition(dropPosition);
dropPosition = (indexInWord < (wordText.Length / 2)) ? wordSegment.Start : wordSegment.End;
}
}
}
return(dropPosition);
}
// Token: 0x060085BD RID: 34237 RVA: 0x0024AA08 File Offset: 0x00248C08
private ITextPointer GetDropPosition(Visual target, Point point)
{
Invariant.Assert(target != null);
Invariant.Assert(this._textEditor.TextView.IsValid);
if (target != this._textEditor.TextView.RenderScope && target != null && this._textEditor.TextView.RenderScope.IsAncestorOf(target))
{
GeneralTransform generalTransform = target.TransformToAncestor(this._textEditor.TextView.RenderScope);
generalTransform.TryTransform(point, out point);
}
ITextPointer textPointer = this.TextView.GetTextPositionFromPoint(point, true);
if (textPointer != null)
{
textPointer = textPointer.GetInsertionPosition(textPointer.LogicalDirection);
if (this._textEditor.AcceptsRichContent)
{
TextSegment normalizedLineRange = TextEditorSelection.GetNormalizedLineRange(this.TextView, textPointer);
if (!normalizedLineRange.IsNull && textPointer.CompareTo(normalizedLineRange.End) < 0 && !TextPointerBase.IsAtWordBoundary(textPointer, LogicalDirection.Forward) && this._dragSourceTextRange != null && TextPointerBase.IsAtWordBoundary(this._dragSourceTextRange.Start, LogicalDirection.Forward) && TextPointerBase.IsAtWordBoundary(this._dragSourceTextRange.End, LogicalDirection.Forward))
{
TextSegment wordRange = TextPointerBase.GetWordRange(textPointer);
string textInternal = TextRangeBase.GetTextInternal(wordRange.Start, wordRange.End);
int offsetToPosition = wordRange.Start.GetOffsetToPosition(textPointer);
textPointer = ((offsetToPosition < textInternal.Length / 2) ? wordRange.Start : wordRange.End);
}
}
}
return(textPointer);
}