private void UpdateDiffDimensions(DiffViewModel diffViewModel, HunkRangeInfo hunkRangeInfo)
{
if (TextView.IsClosed)
{
return;
}
var startLineNumber = hunkRangeInfo.NewHunkRange.StartingLineNumber;
var endLineNumber = startLineNumber + hunkRangeInfo.NewHunkRange.NumberOfLines - 1;
var snapshot = TextView.TextBuffer.CurrentSnapshot;
if (startLineNumber < 0 ||
startLineNumber >= snapshot.LineCount ||
endLineNumber < 0 ||
endLineNumber >= snapshot.LineCount)
{
return;
}
var startLine = snapshot.GetLineFromLineNumber(startLineNumber);
var endLine = snapshot.GetLineFromLineNumber(endLineNumber);
if (startLine == null || endLine == null)
{
return;
}
var mapTop = _scrollBar.Map.GetCoordinateAtBufferPosition(startLine.Start) - 0.5;
var mapBottom = _scrollBar.Map.GetCoordinateAtBufferPosition(endLine.End) + 0.5;
diffViewModel.Top = Math.Round(_scrollBar.GetYCoordinateOfScrollMapPosition(mapTop)) - 2.0;
diffViewModel.Height = Math.Round(_scrollBar.GetYCoordinateOfScrollMapPosition(mapBottom)) - diffViewModel.Top + 2.0;
}
/// <summary>
/// Get top and bottom of a line for the scrollbar.
/// </summary>
/// <param name="line">A line of text from an <see cref="ITextSnapshot"/>.</param>
/// <param name="top">Top coordinate for the scrollbar.</param>
/// <param name="bottom">Bottom coordinate for the scrollbar.</param>
/// <exception cref="ArgumentException">The supplied <see cref="ITextSnapshotLine"/> is on an incorrect snapshot.</exception>
private void MapLineToPixels(ITextSnapshotLine line, out double top, out double bottom)
{
double mapTop = _scrollBar.Map.GetCoordinateAtBufferPosition(line.Start) - 0.5;
double mapBottom = _scrollBar.Map.GetCoordinateAtBufferPosition(line.End) + 0.5;
top = Math.Round(_scrollBar.GetYCoordinateOfScrollMapPosition(mapTop)) - 2.0;
bottom = Math.Round(_scrollBar.GetYCoordinateOfScrollMapPosition(mapBottom)) + 2.0;
}