public Rect CreateBoundingBox(long start, long end, HexBoxDisplaySection section)
{
var firstRow = start >> 4;
var lastRow = end >> 4;
long firstColumn;
long lastColumn;
if (firstRow == lastRow)
{
firstColumn = start & 0xF;
lastColumn = end & 0xF;
}
else
{
firstColumn = 0x0;
lastColumn = 0xF;
}
return(CreateSelectionRectangleFromCells(firstRow, firstColumn, lastRow, lastColumn, section));
}
public Geometry CreateSelectionGeometryFromByteRange(long start, long end, HexBoxDisplaySection section)
{
var firstLine = start >> 4;
var lastLine = end >> 4;
if (firstLine == lastLine)
{
return(new RectangleGeometry(CreateSelectionRectangleFromCells(firstLine, start & 0xF, lastLine, end & 0xF, section)));
}
Geometry lead;
Geometry body;
Geometry trail;
if ((start & 0xF) == 0)
{
lead = null;
}
else
{
lead = new RectangleGeometry(CreateSelectionRectangleFromCells(firstLine, start & 0xF, firstLine, 0xF, section));
firstLine++;
}
if ((end & 0xF) == 0xF)
{
trail = null;
}
else
{
trail = new RectangleGeometry(CreateSelectionRectangleFromCells(lastLine, 0, lastLine, end & 0xF, section));
lastLine--;
}
if (lastLine < firstLine)
{
if (lead == null)
{
return(trail);
}
if (trail == null)
{
return(lead);
}
return(new CombinedGeometry(GeometryCombineMode.Union, lead, trail));
}
body = new RectangleGeometry(CreateSelectionRectangleFromCells(firstLine, 0, lastLine, 0xF, section));
if (lead != null)
{
body = new CombinedGeometry(GeometryCombineMode.Union, lead, body);
}
if (trail != null)
{
body = new CombinedGeometry(GeometryCombineMode.Union, body, trail);
}
return(body);
}
Rect CreateSelectionRectangleFromCells(long firstRow, long firstColumn, long lastRow, long lastColumn, HexBoxDisplaySection section)
{
double left, right;
switch (section)
{
case HexBoxDisplaySection.Byte:
left = _columnPositions[ByteSectionIndex + (firstColumn << 1)];
right = _columnPositions[ByteSectionIndex + 1 + (lastColumn << 1)] + CellWidth;
break;
case HexBoxDisplaySection.Char:
left = _columnPositions[CharSectionIndex + firstColumn];
right = _columnPositions[CharSectionIndex + lastColumn] + CellWidth;
break;
default: throw new ArgumentOutOfRangeException(nameof(section));
}
return(new Rect(
left,
firstRow * CellHeight,
right - left,
(lastRow - firstRow + 1) * CellHeight));
}