public override void Undo(RichTextBox edit)
{
FlowDocument document = edit.Document;
__DataStream.Seek(0, SeekOrigin.Begin);
TextRange whole = new TextRange(document.ContentStart, document.ContentEnd);
TextPointer start = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetStart);
whole.Select(start, start);
whole.Load(__DataStream, DataFormats.Xaml);
TextPointer caretPosition = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetCursorPosition);
edit.CaretPosition = caretPosition;
UpdateOffsets(edit, whole);
if (__IsBlockSelected)
{
// Пересчитать ещё раз start
start = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetStart);
TextPointer end = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetEnd);
edit.Selection.Select(start, end);
}
}
private void PerformUndo(FlowDocument document, RichTextBox edit)
{
__DataStream.Seek(0, SeekOrigin.Begin);
if (__OffsetCursorPositionBefore != -1)
{
__OffsetCursorPositionAfter = document.ContentStart.GetOffsetToPosition(edit.CaretPosition);
}
TextPointer start = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, selectionStartOffset);
TextPointer end = UndoHelpers.SafePositionAtOffset(document, document.ContentEnd, selectionEndOffset);
TextRange whole = new TextRange(start, end);
__UndoStream = new MemoryStream();
whole.Save(__UndoStream, DataFormats.Xaml);
whole.Load(__DataStream, DataFormats.Xaml);
UpdateSelectionOffsets(edit, whole);
if (__OffsetCursorPositionBefore != -1)
{
edit.CaretPosition = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetCursorPositionBefore);
}
else
{
if (edit != null)
{
edit.Selection.Select(start, end);
}
}
}
public override void Redo(RichTextBox edit)
{
edit.CaretPosition = UndoHelpers.SafePositionAtOffset(edit.Document, edit.Document.ContentStart, __OffsetCursorPosition);
edit.Selection.Select(edit.CaretPosition, edit.CaretPosition);
edit.Selection.ApplyPropertyValue(RichTextBox.FontWeightProperty, __RedoFontWeight);
edit.Selection.ApplyPropertyValue(RichTextBox.FontFamilyProperty, __RedoFontFamily);
edit.Selection.ApplyPropertyValue(RichTextBox.FontSizeProperty, __RedoFontSize);
edit.Selection.ApplyPropertyValue(RichTextBox.FontStyleProperty, __RedoFontStyle);
edit.Selection.ApplyPropertyValue(TextBlock.TextDecorationsProperty, __RedoTextDecoration);
}
public override void Redo(RichTextBox edit)
{
FlowDocument document = edit.Document;
TextRange whole = new TextRange(document.ContentStart, document.ContentEnd);
TextPointer start = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetStart);
TextPointer end = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetEnd);
TextRange range = new TextRange(start, end);
range.ClearAllProperties();
range.Text = "";
edit.CaretPosition = end;
UpdateOffsets(edit, range);
}
public override void Redo(RichTextBox edit)
{
FlowDocument document = edit.Document;
__DataStream.Seek(0, SeekOrigin.Begin);
TextRange whole = new TextRange(document.ContentStart, document.ContentEnd);
TextPointer start = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetStart);
TextPointer end = UndoHelpers.SafePositionAtOffset(document, document.ContentEnd, __OffsetEnd);
whole.Select(start, end);
whole.Load(__DataStream, DataFormats.Xaml);
edit.CaretPosition = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetCursorPositionAfter);
}
public override void Undo(RichTextBox edit)
{
FlowDocument document = edit.Document;
__OffsetCursorPositionAfter = document.ContentStart.GetOffsetToPosition(edit.CaretPosition);
TextPointer start = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetStart);
TextPointer end = UndoHelpers.SafePositionAtOffset(document, document.ContentEnd, __OffsetEnd);
TextRange range = new TextRange(start, end);
__DataStream = new MemoryStream();
range.Save(__DataStream, DataFormats.Xaml);
range.ClearAllProperties();
range.Text = "";
edit.CaretPosition = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetCursorPositionBefore);
}
public override void Undo(RichTextBox edit)
{
FlowDocument document = edit.Document;
TextRange whole = new TextRange(document.ContentStart, document.ContentEnd);
TextRange range = new TextRange(
UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetStart),
UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetEnd));
__DataStream = new MemoryStream();
range.Save(__DataStream, DataFormats.Xaml);
range.ClearAllProperties();
range.Text = "";
UpdateOffsets(edit, range);
TextPointer caretPosition = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetStart);
edit.CaretPosition = caretPosition;
}
public override void Undo(RichTextBox edit)
{
__DataStream.Seek(0, SeekOrigin.Begin);
edit.CaretPosition = UndoHelpers.SafePositionAtOffset(edit.Document, edit.Document.ContentStart, __OffsetCursorPosition);
edit.Selection.Select(edit.CaretPosition, edit.CaretPosition);
__RedoFontWeight = edit.Selection.GetPropertyValue(RichTextBox.FontWeightProperty);
__RedoFontFamily = edit.Selection.GetPropertyValue(RichTextBox.FontFamilyProperty);
__RedoFontSize = edit.Selection.GetPropertyValue(RichTextBox.FontSizeProperty);
__RedoFontStyle = edit.Selection.GetPropertyValue(RichTextBox.FontStyleProperty);
__RedoTextDecoration = edit.Selection.GetPropertyValue(TextBlock.TextDecorationsProperty);
edit.Selection.ApplyPropertyValue(RichTextBox.FontWeightProperty, __UndoFontWeight);
edit.Selection.ApplyPropertyValue(RichTextBox.FontFamilyProperty, __UndoFontFamily);
edit.Selection.ApplyPropertyValue(RichTextBox.FontSizeProperty, __UndoFontSize);
edit.Selection.ApplyPropertyValue(RichTextBox.FontStyleProperty, __UndoFontStyle);
edit.Selection.ApplyPropertyValue(TextBlock.TextDecorationsProperty, __UndoTextDecoration);
}
public override void Redo(RichTextBox edit)
{
FlowDocument document = edit.Document;
TextPointer start = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, selectionStartOffset);
TextPointer end = UndoHelpers.SafePositionAtOffset(document, document.ContentEnd, selectionEndOffset);
TextRange whole = new TextRange(start, end);
__UndoStream.Seek(0, SeekOrigin.Begin);
whole.Load(__UndoStream, DataFormats.Xaml);
UpdateSelectionOffsets(edit, whole);
if (__OffsetCursorPositionAfter != -1)
{
edit.CaretPosition = UndoHelpers.SafePositionAtOffset(document, document.ContentStart, __OffsetCursorPositionAfter);
}
else
{
edit.Selection.Select(start, end);
}
}