void DrawFolds(Graphics g, RectangleF rectangle, bool isOpened, bool isSelected)
{
HighlightColor foldMarkerColor = TextArea.Document.HighlightingStrategy.GetColorFor("FoldMarker");
HighlightColor foldLineColor = TextArea.Document.HighlightingStrategy.GetColorFor("FoldLine");
HighlightColor selectedFoldLine = TextArea.Document.HighlightingStrategy.GetColorFor("SelectedFoldLine");
Color foregroundColor = isSelected ? selectedFoldLine.Color : foldLineColor.Color;
Color backgroundColor = foldMarkerColor.BackgroundColor;
Pen foldLinePen = BrushRegistry.GetPen(foregroundColor);
Pen foldMarkerPen = BrushRegistry.GetPen(foldMarkerColor.Color);
Brush backgroundBrush = BrushRegistry.GetBrush(backgroundColor);
Rectangle intRect = new Rectangle((int)rectangle.X, (int)rectangle.Y, (int)rectangle.Width, (int)rectangle.Height);
g.FillRectangle(backgroundBrush, intRect);
g.DrawRectangle(foldLinePen, intRect);
int space = (int)Math.Round(rectangle.Height / 8.0) + 1;
int mid = intRect.Height / 2 + intRect.Height % 2;
// Draw horizontal line (-)
g.DrawLine(foldMarkerPen,
rectangle.X + space,
rectangle.Y + mid,
rectangle.X + rectangle.Width - space,
rectangle.Y + mid);
if (!isOpened)
{
// Draw vertical line (+)
g.DrawLine(foldMarkerPen, rectangle.X + mid, rectangle.Y + space, rectangle.X + mid, rectangle.Y + rectangle.Height - space);
}
}
void PaintFoldMarker(Graphics g, int lineNumber, Rectangle drawingRectangle)
{
HighlightColor foldLineColor = TextArea.Document.HighlightingStrategy.GetColorFor("FoldLine");
HighlightColor selectedFoldLineColor = TextArea.Document.HighlightingStrategy.GetColorFor("SelectedFoldLine");
List <Fold> foldingsWithStart = TextArea.Document.FoldingManager.GetFoldsWithStartAt(lineNumber);
List <Fold> foldingsBetween = TextArea.Document.FoldingManager.GetFoldsContainingLine(lineNumber);
List <Fold> foldingsWithEnd = TextArea.Document.FoldingManager.GetFoldsWithEndAt(lineNumber);
bool isFoldStart = foldingsWithStart.Count > 0;
bool isBetween = foldingsBetween.Count > 0;
bool isFoldEnd = foldingsWithEnd.Count > 0;
bool isStartSelected = SelectedFoldFrom(foldingsWithStart);
bool isBetweenSelected = SelectedFoldFrom(foldingsBetween);
bool isEndSelected = SelectedFoldFrom(foldingsWithEnd);
int foldMarkerSize = (int)Math.Round(TextArea.TextView.LineHeight * 0.57f);
foldMarkerSize -= (foldMarkerSize) % 2;
int foldMarkerYPos = drawingRectangle.Y + (drawingRectangle.Height - foldMarkerSize) / 2;
int xPos = drawingRectangle.X + (drawingRectangle.Width - foldMarkerSize) / 2 + foldMarkerSize / 2;
if (isFoldStart)
{
bool isVisible = true;
bool moreLinedOpenFold = false;
foreach (Fold fold in foldingsWithStart)
{
if (fold.IsFolded)
{
isVisible = false;
}
else
{
moreLinedOpenFold = fold.EndLine > fold.StartLine;
}
}
bool isFoldEndFromUpperFold = false;
foreach (Fold fold in foldingsWithEnd)
{
if (fold.EndLine > fold.StartLine && !fold.IsFolded)
{
isFoldEndFromUpperFold = true;
}
}
RectangleF foldMarkerRectangle = new RectangleF(drawingRectangle.X + (drawingRectangle.Width - foldMarkerSize) / 2,
foldMarkerYPos,
foldMarkerSize,
foldMarkerSize);
DrawFolds(g, foldMarkerRectangle, isVisible, isStartSelected);
// draw line above fold marker
if (isBetween || isFoldEndFromUpperFold)
{
Pen pen = BrushRegistry.GetPen(isBetweenSelected ? selectedFoldLineColor.Color : foldLineColor.Color);
g.DrawLine(pen, xPos, drawingRectangle.Top, xPos, foldMarkerYPos - 1);
}
// draw line below fold marker
if (isBetween || moreLinedOpenFold)
{
bool isSelected = isEndSelected || (isStartSelected && isVisible) || isBetweenSelected;
Color color = (isSelected) ? selectedFoldLineColor.Color : foldLineColor.Color;
Pen pen = BrushRegistry.GetPen(color);
g.DrawLine(pen, xPos, foldMarkerYPos + foldMarkerSize + 1, xPos, drawingRectangle.Bottom);
}
}
else if (isFoldEnd)
{
int midy = drawingRectangle.Top + drawingRectangle.Height / 2;
// draw fold end marker
Color color = isEndSelected ? selectedFoldLineColor.Color : foldLineColor.Color;
Pen pen = BrushRegistry.GetPen(color);
g.DrawLine(pen, 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
color = (isBetweenSelected || isEndSelected) ? selectedFoldLineColor.Color : foldLineColor.Color;
pen = BrushRegistry.GetPen(color);
g.DrawLine(pen, xPos, drawingRectangle.Top, xPos, midy);
// draw line below fold end marker
if (isBetween)
{
color = isBetweenSelected ? selectedFoldLineColor.Color : foldLineColor.Color;
pen = BrushRegistry.GetPen(color);
g.DrawLine(pen, xPos, midy + 1, xPos, drawingRectangle.Bottom);
}
}
else if (isBetween)
{
// just draw the line :)
Color color = isBetweenSelected ? selectedFoldLineColor.Color : foldLineColor.Color;
Pen pen = BrushRegistry.GetPen(color);
g.DrawLine(pen, xPos, drawingRectangle.Top, xPos, drawingRectangle.Bottom);
}
}