static void RedisplayHexLines(HexView hexView)
{
var line = hexView.HexViewLines.FirstVisibleLine;
var verticalDistance = line.Top - hexView.ViewportTop;
var bufferPosition = line.BufferStart;
hexView.DisplayHexLineContainingBufferPosition(bufferPosition, verticalDistance, VSTE.ViewRelativePosition.Top, null, null, DisplayHexLineOptions.CanRecreateBufferLines);
}
void EnsureSpanVisibleY(HexBufferSpan span, VSTE.EnsureSpanVisibleOptions options)
{
bool showStart = (options & VSTE.EnsureSpanVisibleOptions.ShowStart) != 0;
bool minimumScroll = (options & VSTE.EnsureSpanVisibleOptions.MinimumScroll) != 0;
bool alwaysCenter = (options & VSTE.EnsureSpanVisibleOptions.AlwaysCenter) != 0;
var visibleSpan = VisibleSpan;
bool spanIsInView = span.Start >= visibleSpan.Start && span.End <= visibleSpan.End;
if (!spanIsInView)
{
ShowSpan(span, options);
alwaysCenter = true;
visibleSpan = VisibleSpan;
spanIsInView = span.Start >= visibleSpan.Start && span.End <= visibleSpan.End;
}
if (spanIsInView)
{
var lines = hexView.HexViewLines.GetHexViewLinesIntersectingSpan(span);
Debug.Assert(lines.Count > 0);
if (lines.Count == 0)
{
return;
}
var first = lines[0];
var last = lines[lines.Count - 1];
if (lines.Count > 1 && last.BufferStart == span.End)
{
last = lines[lines.Count - 2];
}
var firstSpan = first.BufferSpan;
var lastSpan = last.BufferSpan;
bool allLinesFullyVisible = first.VisibilityState == VSTF.VisibilityState.FullyVisible && last.VisibilityState == VSTF.VisibilityState.FullyVisible;
if (alwaysCenter || (!allLinesFullyVisible && !minimumScroll))
{
double height = last.Bottom - first.Top;
double verticalDistance = (hexView.ViewportHeight - height) / 2;
hexView.DisplayHexLineContainingBufferPosition(first.BufferStart, verticalDistance, VSTE.ViewRelativePosition.Top);
return;
}
if (first.VisibilityState != VSTF.VisibilityState.FullyVisible)
{
if (first != last || !minimumScroll || first.VisibilityState != VSTF.VisibilityState.PartiallyVisible)
{
hexView.DisplayHexLineContainingBufferPosition(first.BufferStart, 0, VSTE.ViewRelativePosition.Top);
}
else if (first.Bottom > hexView.ViewportBottom)
{
hexView.DisplayHexLineContainingBufferPosition(first.BufferStart, 0, VSTE.ViewRelativePosition.Bottom);
}
else
{
hexView.DisplayHexLineContainingBufferPosition(first.BufferStart, 0, VSTE.ViewRelativePosition.Top);
}
}
else if (last.VisibilityState != VSTF.VisibilityState.FullyVisible)
{
hexView.DisplayHexLineContainingBufferPosition(last.BufferStart, 0, VSTE.ViewRelativePosition.Bottom);
}
if (showStart)
{
var line = hexView.HexViewLines.GetHexViewLineContainingBufferPosition(firstSpan.Start);
if (line == null || line.VisibilityState != VSTF.VisibilityState.FullyVisible)
{
ShowSpan(span, options);
}
}
else
{
var line = hexView.HexViewLines.GetHexViewLineContainingBufferPosition(lastSpan.Start);
if (line == null || line.VisibilityState != VSTF.VisibilityState.FullyVisible)
{
ShowSpan(span, options);
}
}
}
}
