package no.uio.ifi.refaktor.utils;

import org.eclipse.jdt.core.IMethod;
import org.eclipse.jdt.core.JavaModelException;


public class MethodRelativeCompilationUnitTextSelection extends CompilationUnitTextSelection {

	private final IMethod method;
	private final int relativeOffset;

	public MethodRelativeCompilationUnitTextSelection(IMethod method, CompilationUnitTextSelection textSelection) {
		super(textSelection);
		this.method = method;

		int methodOffset = 0;
		try {
			methodOffset = freshMethodOffset();
		} catch (JavaModelException e) {
			RefaktorDebug.log(e);
		}
		relativeOffset = textSelection.getOffset() - methodOffset;
	}

	private int freshMethodOffset() throws JavaModelException {
		return method.getSourceRange().getOffset();
	}
	
	@Override
	public int getOffset() {
		try {
			return freshMethodOffset() + relativeOffset;
		} catch (JavaModelException e) {
			RefaktorDebug.log(e);
			return super.getOffset();
		}
	}
	
}