public void Write(ulong offset, byte[] array, long index, int count)
{
if (count <= 0)
{
return;
}
stream.Write(offset, array, index, count);
var h = OnDocumentModified;
if (h != null)
{
h(this, new HexDocumentModifiedEventArgs(offset, NumberUtils.AddUInt64(offset, (ulong)count - 1)));
}
}
protected override void OnRender(DrawingContext drawingContext)
{
base.OnRender(drawingContext);
if (hexBox.Selection == null || hexBox.VisibleBytesPerLine < 1)
{
return;
}
ulong selStart = hexBox.Selection.Value.StartOffset;
ulong selEnd = hexBox.Selection.Value.EndOffset;
int lines = hexBox.VisibleLinesPerPage;
ulong bpl = (ulong)hexBox.VisibleBytesPerLine;
ulong visibleStart = hexBox.TopOffset;
ulong visibleEnd = NumberUtils.AddUInt64(NumberUtils.AddUInt64(visibleStart, NumberUtils.MulUInt64(bpl, NumberUtils.SubUInt64((ulong)lines, 1))), NumberUtils.SubUInt64(bpl, 1));
if (selStart > visibleEnd || selEnd < visibleStart)
{
return;
}
ulong offset = Math.Max(selStart, visibleStart);
ulong endOffset = Math.Min(selEnd, visibleEnd);
double x = -hexBox.CharacterWidth * hexBox.LeftColumn;
double y = (offset - hexBox.TopOffset) / bpl * hexBox.CharacterHeight;
var path = new PathGeometry();
double hexByteX = hexBox.GetHexByteColumnIndex() * hexBox.CharacterWidth;
double asciiX = hexBox.GetAsciiColumnIndex() * hexBox.CharacterWidth;
while (offset <= endOffset)
{
ulong byteIndex = hexBox.GetLineByteIndex(offset);
ulong count = Math.Min(bpl - byteIndex, endOffset - offset + 1);
double dx = byteIndex * hexBox.CharacterWidth;
var rectGeo = new RectangleGeometry(new Rect(x + dx * 3 + hexByteX + hexBox.CharacterWidth, y, count * hexBox.CharacterWidth * 3 - hexBox.CharacterWidth, hexBox.CharacterHeight));
rectGeo.Freeze();
path.AddGeometry(rectGeo);
if (hexBox.ShowAscii)
{
rectGeo = new RectangleGeometry(new Rect(x + dx + asciiX, y, count * hexBox.CharacterWidth, hexBox.CharacterHeight));
rectGeo.Freeze();
path.AddGeometry(rectGeo);
}
if (offset + bpl - byteIndex < offset)
{
break;
}
offset += bpl - byteIndex;
y += hexBox.CharacterHeight;
}
path.Freeze();
drawingContext.DrawGeometry(Background, null, path);
}