/// <summary>
/// Delete the node or character in front of the cursor
/// </summary>
public async Task <bool> ActionDeleteNodeOrCharInFrontOfCursorPos(XmlCursorPos position, SetUndoSnapshotOptions setUnDoSnapshot)
{
if (!this.ActionsAllowed)
{
return(false);
}
// Move the cursor one position to the left
var deleteArea = new XmlCursor();
deleteArea.StartPos.SetPos(position.ActualNode, position.PosOnNode, position.PosInTextNode);
var endPos = deleteArea.StartPos.Clone();
await CursorPosMoveHelper.MoveLeft(endPos, this.editorState.RootNode, this.xmlRules);
deleteArea.EndPos.SetPos(endPos.ActualNode, endPos.PosOnNode, endPos.PosInTextNode);
await deleteArea.OptimizeSelection();
if (deleteArea.StartPos.ActualNode == this.editorState.RootNode)
{
return(false); // You must not delete the root node
}
if (setUnDoSnapshot == SetUndoSnapshotOptions.Yes)
{
this.editorState.UndoHandler.SetSnapshot("delete", this.editorState.CursorRaw);
}
var deleteResult = await XmlCursorSelectionHelper.DeleteSelection(deleteArea);
if (deleteResult.Success)
{
// After successful deletion the new CursorPos is retrieved here
await this.editorState.CursorRaw.SetPositions(deleteResult.NewCursorPosAfterDelete.ActualNode, deleteResult.NewCursorPosAfterDelete.PosOnNode, deleteResult.NewCursorPosAfterDelete.PosInTextNode, throwChangedEventWhenValuesChanged : false);
await this.editorState.FireContentChangedEvent(needToSetFocusOnEditorWhenLost : false, forceFullRepaint : false);
return(true);
}
return(false);
}
public async Task <bool> MoveLeft(XmlCursorPos cursorPos)
{
return(await CursorPosMoveHelper.MoveLeft(cursorPos, this.editorContext.EditorState.RootNode, this.editorContext.XmlRules));
}