tool-chain modification functionality for the per-file settings

build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/core/IResourceConfiguration.java

@@ -229,4 +229,6 @@ public interface IResourceConfiguration extends IResourceInfo {
 	 * @param rebuild
 	 */
 	void setRebuildState(boolean rebuild);
+	
+	void setTools(ITool[] tools);
 }

build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/internal/core/ResourceConfiguration.java

@@ -983,5 +983,83 @@ public class ResourceConfiguration extends ResourceInfo implements IFileInfo {
 		return false;
 	}
 	
+	private ITool[][] getRealPairs(ITool[] tools){
+		ITool[][] pairs = new ITool[tools.length][];
+		for(int i = 0; i < tools.length; i++){
+			ITool[] pair = new ITool[2];
+			pair[0] = ManagedBuildManager.getRealTool(tools[i]);
+			pair[1] = tools[i];
+			pairs[i] = pair;
+		}
+		return pairs;
+	}
 	
+	private int getPairIndex(ITool[][] pairs, ITool tool, int startIndex){
+		for(; startIndex < pairs.length; startIndex++){
+			if(pairs[startIndex][0] == tool)
+				return startIndex;
+		}
+		return -1;
+	}
+	
+	private int getNextIndex(Map map, ITool[][] pairs, ITool tool){
+		Integer indexInt = (Integer)map.get(tool.getId());
+		int index = 0;
+		if(indexInt != null){
+			index = indexInt.intValue();
+			if(index >= 0)
+				index++;
+		}
+		
+		if(index >= 0){
+			index = getPairIndex(pairs, tool, index);
+			map.put(tool.getId(), new Integer(index));
+		}
+
+		return index;
+	}
+	
+	private static IConfiguration getConfiguration(ITool tool){
+		IBuildObject bo = tool.getParent();
+		if(bo instanceof IToolChain)
+			return ((IToolChain)bo).getParent();
+		else if(bo instanceof IFileInfo)
+			return ((IFileInfo)bo).getParent();
+		return null;
+	}
+	
+	public void setTools(ITool[] tools){
+		if(isExtensionElement())
+			return;
+		
+		ITool[][] newPairs = getRealPairs(tools);
+		ITool[][] curPairs = getRealPairs(getTools());
+		Map realIdToPickedIndexMap = new HashMap();
+		
+		List newToolList = new ArrayList(tools.length);
+		
+		for(int i = 0; i < newPairs.length; i++){
+			ITool[] pair = newPairs[i];
+			int index = getNextIndex(realIdToPickedIndexMap, curPairs, pair[0]);
+			if(index >= 0){
+				newToolList.add(curPairs[index][1]);
+			} else {
+				ITool newBase = pair[1];
+				IConfiguration cfg = getConfiguration(newBase);
+				if(cfg != getParent()){
+					newBase = ManagedBuildManager.getExtensionTool(newBase);
+				}
+				
+				Tool newTool = new Tool(this, 
+						newBase, 
+						ManagedBuildManager.calculateChildId(newBase.getId(), null),
+						pair[1].getName(),
+						false);
+				
+				newToolList.add(newTool);
+			}
+		}
+		
+		toolList = newToolList;
+	}
 }