void PaintFoldMarker(Graphics g, int lineNumber, Rectangle drawingRectangle)
{
HighlightColor foldLineColor = textArea.Document.HighlightingStrategy.GetColorFor("FoldLine");
HighlightColor selectedFoldLine = textArea.Document.HighlightingStrategy.GetColorFor("SelectedFoldLine");
List <FoldMarker> foldingsWithStart = textArea.Document.FoldingManager.GetFoldingsWithStart(lineNumber);
List <FoldMarker> foldingsBetween = textArea.Document.FoldingManager.GetFoldingsContainsLineNumber(lineNumber);
List <FoldMarker> foldingsWithEnd = textArea.Document.FoldingManager.GetFoldingsWithEnd(lineNumber);
bool isFoldStart = foldingsWithStart.Count > 0;
bool isBetween = foldingsBetween.Count > 0;
bool isFoldEnd = foldingsWithEnd.Count > 0;
bool isStartSelected = SelectedFoldingFrom(foldingsWithStart);
bool isBetweenSelected = SelectedFoldingFrom(foldingsBetween);
bool isEndSelected = SelectedFoldingFrom(foldingsWithEnd);
int foldMarkerSize = (int)Math.Round(textArea.TextView.FontHeight * 0.57f);
foldMarkerSize -= (foldMarkerSize) % 2;
int foldMarkerYPos = drawingRectangle.Y + (int)((drawingRectangle.Height - foldMarkerSize) / 2);
int xPos = drawingRectangle.X + (drawingRectangle.Width - foldMarkerSize) / 2 + foldMarkerSize / 2;
if (isFoldStart)
{
bool isVisible = true;
bool moreLinedOpenFold = false;
foreach (FoldMarker foldMarker in foldingsWithStart)
{
if (foldMarker.IsFolded)
{
isVisible = false;
}
else
{
moreLinedOpenFold = foldMarker.EndLine > foldMarker.StartLine;
}
}
bool isFoldEndFromUpperFold = false;
foreach (FoldMarker foldMarker in foldingsWithEnd)
{
if (foldMarker.EndLine > foldMarker.StartLine && !foldMarker.IsFolded)
{
isFoldEndFromUpperFold = true;
}
}
DrawFoldMarker(g, new RectangleF(drawingRectangle.X + (drawingRectangle.Width - foldMarkerSize) / 2,
foldMarkerYPos,
foldMarkerSize,
foldMarkerSize),
isVisible,
isStartSelected
);
// draw line above fold marker
if (isBetween || isFoldEndFromUpperFold)
{
g.DrawLine(BrushRegistry.GetPen(isBetweenSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
drawingRectangle.Top,
xPos,
foldMarkerYPos - 1);
}
// draw line below fold marker
if (isBetween || moreLinedOpenFold)
{
g.DrawLine(BrushRegistry.GetPen(isEndSelected || (isStartSelected && isVisible) || isBetweenSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
foldMarkerYPos + foldMarkerSize + 1,
xPos,
drawingRectangle.Bottom);
}
}
else
{
if (isFoldEnd)
{
int midy = drawingRectangle.Top + drawingRectangle.Height / 2;
// draw fold end marker
g.DrawLine(BrushRegistry.GetPen(isEndSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
midy,
xPos + foldMarkerSize / 2,
midy);
// draw line above fold end marker
// must be drawn after fold marker because it might have a different color than the fold marker
g.DrawLine(BrushRegistry.GetPen(isBetweenSelected || isEndSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
drawingRectangle.Top,
xPos,
midy);
// draw line below fold end marker
if (isBetween)
{
g.DrawLine(BrushRegistry.GetPen(isBetweenSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
midy + 1,
xPos,
drawingRectangle.Bottom);
}
}
else if (isBetween)
{
// just draw the line :)
g.DrawLine(BrushRegistry.GetPen(isBetweenSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
drawingRectangle.Top,
xPos,
drawingRectangle.Bottom);
}
}
}