/// <summary>
///
/// </summary>
internal ModifyEventArgs(ModifyStatus modifyStatus, IHighLevelCommand command, TextPos endPos)
{
ModifyStatus = modifyStatus;
ModifyDetail = command.ModifyDetail;
Range = command.ResultRange;
OldEndPos = endPos;
}
/// <summary>
///
/// </summary>
public void Redo()
{
var endPos = TextPos.GetEndPos(this);
if (_undoRedoHistory.TryRedo(out var command))
{
RaiseModifyEvent(ModifyStatus.Modify, command, endPos);
}
}
/// <summary>
///
/// </summary>
private bool TryExecuteCommand(IHighLevelCommand command)
{
if (command.Validate())
{
var endPos = TextPos.GetEndPos(this);
_undoRedoHistory.Execute(command);
RaiseModifyEvent(ModifyStatus.Modify, command, endPos);
return(true);
}
return(false);
}
/// <summary>
///
/// </summary>
private void RaiseModifyEvent(ModifyStatus status, IHighLevelCommand command, TextPos endPos)
{
DocModified?.Invoke(new ModifyEventArgs(status, command, endPos));
}
/// <summary>
///
/// </summary>
private TextRange GetNextOrPrevRange(TextPos pos, bool isRemoveNext)
{
var offsetPos = isRemoveNext ? pos.GetNextPos(this) : pos.GetPrevPos(this);
return(new TextRange(offsetPos, pos));
}
/// <summary>
///
/// </summary>
public void RemoveBack(TextPos pos)
{
TryExecuteCommand(new RemoveTextCommand(_internalData, GetNextOrPrevRange(pos, false), ModifyDetail.RemoveOne));
}
/// <summary>
///
/// </summary>
public void InsertText(TextPos pos, string text)
{
InsertText(new TextRange(pos, pos), text);
}
