private Fold findOpenFoldClosestTo(Point p) {
Fold fold = null;
RSyntaxTextArea rsta = (RSyntaxTextArea) textArea;
if (rsta.isCodeFoldingEnabled()) { // Should always be true
int offs = rsta.viewToModel(p); // TODO: Optimize me
if (offs > -1) {
try {
int line = rsta.getLineOfOffset(offs);
int origLine = line;
FoldManager fm = rsta.getFoldManager();
do {
fold = fm.getFoldForLine(line);
} while (fold == null && line-- >= 0);
if (fold != null && !fold.containsOrStartsOnLine(origLine)) {
// Found closest fold, but doesn't actually contain line
fold = null;
}
} catch (BadLocationException ble) {
ble.printStackTrace(); // Never happens
}
}
}
return fold;
}
/**
* Overridden to show the content of a collapsed fold on mouse-overs.
*
* @param e The mouse location.
*/
public String getToolTipText(MouseEvent e) {
String text = null;
RSyntaxTextArea rsta = (RSyntaxTextArea) textArea;
if (rsta.isCodeFoldingEnabled()) {
FoldManager fm = rsta.getFoldManager();
int pos = rsta.viewToModel(new Point(0, e.getY()));
if (pos >= 0) { // Not -1
int line = 0;
try {
line = rsta.getLineOfOffset(pos);
} catch (BadLocationException ble) {
ble.printStackTrace(); // Never happens
return null;
}
Fold fold = fm.getFoldForLine(line);
if (fold != null && fold.isCollapsed()) {
int endLine = fold.getEndLine();
if (fold.getLineCount() > 25) { // Not too big
endLine = fold.getStartLine() + 25;
}
StringBuffer sb = new StringBuffer("<html><nobr>");
while (line <= endLine && line < rsta.getLineCount()) { // Sanity
Token t = rsta.getTokenListForLine(line);
while (t != null && t.isPaintable()) {
t.appendHTMLRepresentation(sb, rsta, true, true);
t = t.getNextToken();
}
sb.append("<br>");
line++;
}
text = sb.toString();
}
}
}
return text;
}
protected void paintComponent(Graphics g) {
if (textArea == null) {
return;
}
visibleRect = g.getClipBounds(visibleRect);
if (visibleRect == null) { // ???
visibleRect = getVisibleRect();
}
// System.out.println("IconRowHeader repainting: " + visibleRect);
if (visibleRect == null) {
return;
}
Color bg = getBackground();
if (getGutter() != null) { // Should always be true
bg = getGutter().getBackground();
}
g.setColor(bg);
g.fillRect(0, visibleRect.y, getWidth(), visibleRect.height);
RSyntaxTextArea rsta = (RSyntaxTextArea) textArea;
if (!rsta.isCodeFoldingEnabled()) {
return; // We should be hidden in this case, but still...
}
if (textArea.getLineWrap()) {
paintComponentWrapped(g);
return;
}
// Get where to start painting (top of the row).
// We need to be "scrolled up" up just enough for the missing part of
// the first line.
int cellHeight = textArea.getLineHeight();
int topLine = visibleRect.y / cellHeight;
int y = topLine * cellHeight + (cellHeight - collapsedFoldIcon.getIconHeight()) / 2;
textAreaInsets = textArea.getInsets(textAreaInsets);
if (textAreaInsets != null) {
y += textAreaInsets.top;
}
// Get the first and last lines to paint.
FoldManager fm = rsta.getFoldManager();
topLine += fm.getHiddenLineCountAbove(topLine, true);
int width = getWidth();
int x = width - 10;
int line = topLine;
boolean paintingOutlineLine =
foldWithOutlineShowing != null && foldWithOutlineShowing.containsLine(line);
while (y < visibleRect.y + visibleRect.height) {
if (paintingOutlineLine) {
g.setColor(getForeground());
int w2 = width / 2;
if (line == foldWithOutlineShowing.getEndLine()) {
int y2 = y + cellHeight / 2;
g.drawLine(w2, y, w2, y2);
g.drawLine(w2, y2, width - 2, y2);
paintingOutlineLine = false;
} else {
g.drawLine(w2, y, w2, y + cellHeight);
}
}
Fold fold = fm.getFoldForLine(line);
if (fold != null) {
if (fold == foldWithOutlineShowing && !fold.isCollapsed()) {
g.setColor(getForeground());
int w2 = width / 2;
g.drawLine(w2, y + cellHeight / 2, w2, y + cellHeight);
paintingOutlineLine = true;
}
if (fold.isCollapsed()) {
collapsedFoldIcon.paintIcon(this, g, x, y);
// Skip to next line to paint, taking extra care for lines with
// block ends and begins together, e.g. "} else {"
do {
line += fold.getLineCount();
fold = fm.getFoldForLine(line);
} while (fold != null && fold.isCollapsed());
} else {
expandedFoldIcon.paintIcon(this, g, x, y);
}
}
line++;
y += cellHeight;
}
}