/// <summary>
/// Pres the process wm key down_ up.
/// </summary>
/// <param name="m">The m.</param>
/// <returns></returns>
protected virtual bool PreProcessWmKeyDown_Up(ref Message m)
{
long pos = HexViewer.bytePosition;
int cp = HexViewer.byteCharacterPosition;
if (!(pos == 0 && cp == 0))
{
pos = Math.Max(-1, pos - HexViewer.hexMaxHBytes);
if (pos == -1)
{
return(true);
}
HexViewer.SetPosition(pos);
if (pos < HexViewer.startByte)
{
HexViewer.PerformScrollLineUp();
}
HexViewer.UpdateCaret();
HexViewer.Invalidate();
}
HexViewer.ScrollByteIntoView();
HexViewer.ReleaseSelection();
return(true);
}
/// <summary>
/// Pres the process wm char.
/// </summary>
/// <param name="m">The m.</param>
/// <returns></returns>
public override bool PreProcessWmChar(ref Message m)
{
if (Control.ModifierKeys == Keys.Control)
{
return(HexViewer.BasePreProcessMessage(ref m));
}
bool sw = HexViewer._byteProvider.SupportsWriteByte;
bool si = HexViewer._byteProvider.SupportsInsertBytes;
bool sd = HexViewer._byteProvider.SupportsDeleteBytes;
long pos = HexViewer.bytePosition;
long sel = HexViewer._selectionLength;
int cp = HexViewer.byteCharacterPosition;
if ((!sw && pos != HexViewer._byteProvider.Length) ||
(!si && pos == HexViewer._byteProvider.Length))
{
return(HexViewer.BasePreProcessMessage(ref m));
}
char c = (char)m.WParam.ToInt32();
if (RaiseKeyPress(c))
{
return(true);
}
if (HexViewer.ReadOnly)
{
return(true);
}
bool isInsertMode = (pos == HexViewer._byteProvider.Length);
// do insert when insertActive = true
if (!isInsertMode && si && HexViewer._insertActive)
{
isInsertMode = true;
}
if (sd && si && sel > 0)
{
HexViewer._byteProvider.DeleteBytes(pos, sel);
isInsertMode = true;
cp = 0;
HexViewer.SetPosition(pos, cp);
}
HexViewer.ReleaseSelection();
if (isInsertMode)
{
HexViewer._byteProvider.InsertBytes(pos, new byte[] { (byte)c });
}
else
{
HexViewer._byteProvider.WriteByte(pos, (byte)c);
}
PerformPosMoveRightByte();
HexViewer.Invalidate();
return(true);
}