lineHeight = host.getLineHeight();
ascent = host.getMaxAscent();//metrics.getAscent();
int heightAbove = clip.y - alloc.y;
int linesAbove = Math.max(0, heightAbove / lineHeight);
FoldManager fm = host.getFoldManager();
linesAbove += fm.getHiddenLineCountAbove(linesAbove, true);
Rectangle lineArea = lineToRect(a, linesAbove);
int y = lineArea.y + ascent;
int x = lineArea.x;
Element map = getElement();
int lineCount = map.getElementCount();
// Whether token styles should always be painted, even in selections
int selStart = host.getSelectionStart();
int selEnd = host.getSelectionEnd();
boolean useSelectedTextColor = host.getUseSelectedTextColor();
RSyntaxTextAreaHighlighter h =
(RSyntaxTextAreaHighlighter)host.getHighlighter();
Graphics2D g2d = (Graphics2D)g;
Token token;
//System.err.println("Painting lines: " + linesAbove + " to " + (endLine-1));
TokenPainter painter = host.getTokenPainter();
int line = linesAbove;
//int count = 0;
while (y<clip.y+clip.height+ascent && line<lineCount) {
Fold fold = fm.getFoldForLine(line);
Element lineElement = map.getElement(line);
int startOffset = lineElement.getStartOffset();
//int endOffset = (line==lineCount ? lineElement.getEndOffset()-1 :
// lineElement.getEndOffset()-1);
int endOffset = lineElement.getEndOffset()-1; // Why always "-1"?
h.paintLayeredHighlights(g2d, startOffset, endOffset,
a, host, this);
// Paint a line of text.
token = document.getTokenListForLine(line);
if (!useSelectedTextColor || selStart==selEnd ||
(startOffset>=selEnd || endOffset<selStart)) {
drawLine(painter, token, g2d, x,y);
}
else {
//System.out.println("Drawing line with selection: " + line);
drawLineWithSelection(painter,token,g2d, x,y, selStart, selEnd);
}
if (fold!=null && fold.isCollapsed()) {
// Visible indicator of collapsed lines
Color c = RSyntaxUtilities.getFoldedLineBottomColor(host);
if (c!=null) {
g.setColor(c);
g.drawLine(x,y+lineHeight-ascent-1,
host.getWidth(),y+lineHeight-ascent-1);
}
// Skip to next line to paint, taking extra care for lines with
// block ends and begins together, e.g. "} else {"
do {
int hiddenLineCount = fold.getLineCount();
if (hiddenLineCount==0) {
// Fold parser identified a zero-line fold region.
// This is really a bug, but we'll be graceful here
// and avoid an infinite loop.
break;
}
line += hiddenLineCount;
fold = fm.getFoldForLine(line);
} while (fold!=null && fold.isCollapsed());
}
y += lineHeight;