/**
* makes a best effort to get a precise position for this element
*
* @param e
* @return
*/
public static WPos getPos(AstElement e) {
if (e instanceof AstElementWithSource) {
AstElementWithSource ws = (AstElementWithSource) e;
return ws.getSource();
}
if (e.size() > 0) { // try to find the position by examining the childs
int min = Integer.MAX_VALUE;
int max = Integer.MIN_VALUE;
for (int i = 0; i < e.size(); i++) {
AstElement child = e.get(i);
WPos childSource = child.attrSource();
min = Math.min(min, childSource.getLeftPos());
max = Math.max(max, childSource.getRightPos());
}
return new WPos(
e.get(0).attrSource().getFile(), e.get(0).attrSource().getLineOffsets(), min, max);
}
// if no childs exist, search a parent element with a explicit position
AstElement parent = e.getParent();
while (parent != null) {
if (parent instanceof AstElementWithSource) {
WPos parentSource = ((AstElementWithSource) parent).getSource();
// use parent position but with size -1, so we do not go into this
return new WPos(
parentSource.getFile(),
parentSource.getLineOffsets(),
parentSource.getLeftPos(),
parentSource.getLeftPos() - 1);
}
parent = parent.getParent();
}
return new WPos("<source of " + e + " not found>", new LineOffsets(), 0, 0);
}
private static void addErrorOrWarning(AstElement e, String msg, ErrorType errorType)
throws CompileError {
ErrorHandler handler = e.getErrorHandler();
CompileError c = makeCompileError(e, msg, handler, errorType);
if (c != null) {
handler.sendError(c);
}
}
private static CompileError makeCompileError(
AstElement e, String msg, ErrorHandler handler, CompileError.ErrorType errorType)
throws CompileError {
WPos pos = e.attrErrorPos();
if (handler.isUnitTestMode()) {
throw new CompileError(pos, msg);
}
ListIterator<CompileError> it = handler.getErrors().listIterator();
while (it.hasNext()) {
CompileError err = it.next();
if (err.getSource().getFile().equals(pos.getFile())) {
if (bigger(err.getSource(), pos)) {
// remove bigger errors
it.remove();
} else if (bigger(pos, err.getSource()) || equal(pos, err.getSource())) {
// do not add smaller or equal errors
return null;
}
}
}
return new CompileError(pos, msg, errorType);
}
public static WPos getErrorPos(AstElement e) {
return e.attrSource();
}
public static ErrorHandler getErrorHandler(AstElement e) {
if (e.getParent() == null) {
throw new Error("Trying to get error handler of element not attached to root:\n" + e);
}
return e.getParent().getErrorHandler();
}