public static void expandRegionAtCaret(final Project project, @Nullable final Editor editor) {
if (editor == null) return;
CodeFoldingManager foldingManager = CodeFoldingManager.getInstance(project);
foldingManager.updateFoldRegions(editor);
final int line = editor.getCaretModel().getLogicalPosition().line;
Runnable processor =
new Runnable() {
public void run() {
FoldRegion region = FoldingUtil.findFoldRegionStartingAtLine(editor, line);
if (region != null && !region.isExpanded()) {
region.setExpanded(true);
} else {
int offset = editor.getCaretModel().getOffset();
FoldRegion[] regions = FoldingUtil.getFoldRegionsAtOffset(editor, offset);
for (int i = regions.length - 1; i >= 0; i--) {
region = regions[i];
if (!region.isExpanded()) {
region.setExpanded(true);
break;
}
}
}
}
};
editor.getFoldingModel().runBatchFoldingOperation(processor);
}
