1 files changed, 103 insertions, 0 deletions
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/rewrite/changegenerator/ModificationScopeStack.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/rewrite/changegenerator/ModificationScopeStack.java
new file mode 100644
index 00000000000..f73f23bc043
--- /dev/null
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/rewrite/changegenerator/ModificationScopeStack.java
@@ -0,0 +1,103 @@
+/*******************************************************************************
+ * Copyright (c) 2008 Institute for Software, HSR Hochschule fuer Technik  
+ * Rapperswil, University of applied sciences and others
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Eclipse Public License v1.0 
+ * which accompanies this distribution, and is available at 
+ * http://www.eclipse.org/legal/epl-v10.html  
+ *  
+ * Contributors: 
+ * Institute for Software - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.internal.core.dom.rewrite.changegenerator;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.eclipse.cdt.core.dom.ast.IASTNode;
+import org.eclipse.cdt.internal.core.dom.rewrite.ASTModification;
+import org.eclipse.cdt.internal.core.dom.rewrite.ASTModificationMap;
+import org.eclipse.cdt.internal.core.dom.rewrite.ASTModificationStore;
+
+public class ModificationScopeStack {
+	private LinkedList<List<ASTModification>> scopeStack;
+	private ASTModificationStore modStore;
+
+	public ModificationScopeStack(ASTModificationStore modificationStore) {
+		scopeStack = new LinkedList<List<ASTModification>>();
+		modStore = modificationStore;
+		ArrayList<ASTModification> nullModList = new ArrayList<ASTModification>();
+		nullModList.add(null);
+		scopeStack.addFirst(nullModList);
+	}
+	
+	public void pushScope(IASTNode node) {
+		List<ASTModification> newMods = new ArrayList<ASTModification>();
+		for(ASTModification peekMod : scopeStack.peek()) {
+			ASTModificationMap nestedMods = modStore.getNestedModifications(peekMod);
+			if (nestedMods != null) {
+				newMods.addAll(nestedMods.getModificationsForNode(node));
+			}
+		}
+		
+		if (!newMods.isEmpty()) {
+			scopeStack.addFirst(newMods);
+		}
+	}
+
+	private List<ASTModification> getNestedModifikationsForNode(IASTNode node) {
+		ASTModificationMap rootModifications = modStore.getRootModifications();
+		if (rootModifications == null) {
+			return Collections.emptyList();
+		}
+		return rootModifications.getModificationsForNode(node);
+	}
+
+	public void popScope(IASTNode node) {
+		List<ASTModification> peek = scopeStack.peek();
+		if (peek != null) {
+			if (!peek.isEmpty() && peek.get(0).getTargetNode() == node) {
+				scopeStack.removeFirst();
+			}
+		}
+	}
+	
+	public Collection<IASTNode> getModifiedNodes() {
+		List<ASTModification> aktModList = scopeStack.peek();
+		if (aktModList == null) {
+			return getNestedModifiedNodes();
+		}
+		Collection<IASTNode> nodes = new ArrayList<IASTNode>();
+		for (ASTModification modification : aktModList) {
+			ASTModificationMap nestedModifications = modStore.getNestedModifications(modification);
+			if (nestedModifications != null) {
+				nodes.addAll(nestedModifications.getModifiedNodes());
+			}
+		}
+		return Collections.unmodifiableCollection(nodes);
+	}
+
+	private Collection<IASTNode> getNestedModifiedNodes() {
+		ASTModificationMap rootModifications = modStore.getRootModifications();
+		if(rootModifications == null) {
+			return Collections.emptyList();
+		}
+		return rootModifications.getModifiedNodes();
+	}
+
+	public List<ASTModification> getModificationsForNode(IASTNode node) {
+		List<ASTModification> aktModList = scopeStack.peek();
+		if (aktModList == null) {
+			return getNestedModifikationsForNode(node);
+		}
+		List<ASTModification> modForNodeList = new ArrayList<ASTModification>();
+		for (ASTModification modification : aktModList) {
+			modForNodeList.addAll(modStore.getNestedModifications(modification).getModificationsForNode(node));
+		}
+		return Collections.unmodifiableList(modForNodeList);
+	}
+
+}