update buildfile after each parser run to reflect expected conflicts

CupPlugin/src/de/tum/in/www2/cupplugin/views/BuildfileUpdater.java

@@ -26,7 +26,7 @@ import org.xml.sax.SAXException;
 
 public class BuildfileUpdater {
 	
-	public static void updateExpectedConflicts(IProject project,int number) throws ParserConfigurationException, SAXException, IOException, CoreException, TransformerConfigurationException, TransformerException, TransformerFactoryConfigurationError{
+	public static void updateExpectedConflicts(IProject project,int number) throws ParserConfigurationException, SAXException, CoreException, TransformerConfigurationException, TransformerException, TransformerFactoryConfigurationError, IOException{
 		boolean modified = false;
 		
 		Path path = new Path("build.xml");
@@ -37,7 +37,7 @@ public class BuildfileUpdater {
 		Document doc = db.parse(file.getContents());
 		
 		if(doc.getElementsByTagName("cup").getLength() != 1){
-			//TODO: error
+			throw new IOException();
 		}
 		else {
 			Node n = doc.getElementsByTagName("cup").item(0);

CupPlugin/src/de/tum/in/www2/cupplugin/views/CupConflictsView.java

@@ -210,38 +210,47 @@ public class CupConflictsView extends FailableView implements ICupEditorPageVisi
 		refreshScrolledLayout();
 	}
 
-	private void updateBuildfile(){
-		//DEBUG
+	private void updateBuildfile(int number){
 		try {
 			IFileEditorInput input = (IFileEditorInput)editor.getEditorInput();
 			IFile file = input.getFile();
 			IProject project = file.getProject();
 			
-			BuildfileUpdater.updateExpectedConflicts(project,42);
+			BuildfileUpdater.updateExpectedConflicts(project,number);
 		} catch (ParserConfigurationException | SAXException | IOException | CoreException | TransformerException
 				| TransformerFactoryConfigurationError e1) {
-			// TODO Auto-generated catch block
-			e1.printStackTrace();
+			Shell shell = new Shell(Display.getCurrent());
+			MessageBox box = new MessageBox(shell,SWT.ICON_WARNING | SWT.OK);
+			box.setText("Information");
+			box.setMessage("Failed to update the expect label in the buildfile.\nThere was no file named build.xml containing a cup section.\n"
+					+ "Please update your buildfile and set the expect label to number.");
+			box.open();
+			
 		}
 	}
 	
 	private void updateConflicts(ConflictResolutionManager crm) {
-		updateBuildfile();
 		ignoreRRAfterLine = computeIgnoreRRAfter();
 		
 		List<Conflict> conflicts = new ArrayList<>();
 		terminalsAffectConflicts = new HashMap<>();
 		ordersAffectConflicts = new HashMap<>();
+		int ignored = 0;
 		for (int i = 0; i < crm.getAllConflicts().size(); i++) {
 			Conflict c = crm.getAllConflicts().get(i);
 			if(!isIgnored(c)){
 				conflicts.add(c);
 				addToTerminalSet(crm,c);
 				addToOrderSet(c);
+			} else{
+				ignored++;
 			}
 		}
 		int size = conflicts.size();
 		
+		//TODO:Do this less often
+		updateBuildfile(ignored);
+		
 		scrolled.setLayoutDeferred(true);
 
 		matchPanelNumber(size);