void HexBox_OnWrite(object sender, HexBoxWriteEventArgs e)
{
const string key = "HexBoxUndo";
var hts = (HexTabState)TabState.GetTabState((HexBox)sender);
var doc = hts.HexBox.Document;
if (doc == null)
return;
if (e.IsBeforeWrite) {
var info = new UndoInfo();
info.OriginalData = hts.HexBox.Document.Read(e.StartOffset, e.Size);
info.OriginalCaretPosition = hts.HexBox.CaretPosition;
e.Context[key] = info;
}
else {
var info = (UndoInfo)e.Context[key];
bool updated = TryUpdateOldTextInputCommand(e.Type, hts.HexBox, info.OriginalCaretPosition, e.StartOffset, info.OriginalData);
if (!updated) {
ClearTextInputCommand();
var cmd = new HexBoxUndoCommand(hts.HexBox, info.OriginalCaretPosition, e.StartOffset, info.OriginalData, GetDescription(e));
UndoCommandManager.Instance.Add(cmd);
if (e.Type == HexWriteType.ByteInput || e.Type == HexWriteType.AsciiInput)
SetTextInputCommand(cmd);
}
}
}
static string GetDescription(HexBoxWriteEventArgs e)
{
switch (e.Type) {
case HexWriteType.Paste: return string.Format("Paste {0} bytes @ {1:X8}", e.Size, e.StartOffset);
case HexWriteType.ByteInput: return "Insert Bytes";
case HexWriteType.AsciiInput: return "Insert ASCII";
case HexWriteType.Fill: return string.Format("Fill {0} bytes @ {1:X8}", e.Size, e.StartOffset);
default: return null;
}
}
Dictionary<object, object> NotifyWrite(HexWriteType type, ulong offs, int count, bool isBeforeWrite, Dictionary<object, object> context) {
var ea = new HexBoxWriteEventArgs(type, offs, count, isBeforeWrite, context);
if (OnWrite != null)
OnWrite(this, ea);
return ea.Context;
}