Debugger: Add ExpressionValues to VariablesViewState.

- VariablesViewState is now able to optionally store previous values
  for expression nodes.

src/apps/debugger/user_interface/gui/model/VariablesViewState.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013, Rene Gollent, [email protected].
+ * Copyright 2013-2014, Rene Gollent, [email protected].
  * Copyright 2009, Ingo Weinhold, [email protected].
  * Distributed under the terms of the MIT License.
  */
@@ -9,6 +9,7 @@
 
 #include <new>
 
+#include "ExpressionValues.h"
 #include "FunctionID.h"
 #include "StackFrameValues.h"
 #include "Type.h"
@@ -164,7 +165,8 @@ struct VariablesViewState::InfoEntryHashDefinition {
 VariablesViewState::VariablesViewState()
 	:
 	fNodeInfos(NULL),
-	fValues(NULL)
+	fValues(NULL),
+	fExpressionValues(NULL)
 {
 }
 
@@ -201,6 +203,22 @@ VariablesViewState::SetValues(StackFrameValues* values)
 }
 
 
+void
+VariablesViewState::SetExpressionValues(ExpressionValues* values)
+{
+	if (fExpressionValues == values)
+		return;
+
+	if (fExpressionValues != NULL)
+		fExpressionValues->ReleaseReference();
+
+	fExpressionValues = values;
+
+	if (fExpressionValues != NULL)
+		fExpressionValues->AcquireReference();
+}
+
+
 const VariablesViewNodeInfo*
 VariablesViewState::GetNodeInfo(ObjectID* variable,
 	const TypeComponentPath* path) const

src/apps/debugger/user_interface/gui/model/VariablesViewState.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013, Rene Gollent, [email protected].
+ * Copyright 2013-2014, Rene Gollent, [email protected].
  * Copyright 2009, Ingo Weinhold, [email protected].
  * Distributed under the terms of the MIT License.
  */
@@ -12,6 +12,7 @@
 #include <util/OpenHashTable.h>
 
 
+class ExpressionValues;
 class ObjectID;
 class StackFrameValues;
 class Type;
@@ -59,6 +60,10 @@ public:
 									{ return fValues; }
 			void				SetValues(StackFrameValues* values);
 
+			ExpressionValues*	GetExpressionValues() const
+									{ return fExpressionValues; }
+			void				SetExpressionValues(ExpressionValues* values);
+
 			const VariablesViewNodeInfo* GetNodeInfo(ObjectID* variable,
 									const TypeComponentPath* path) const;
 	inline	const VariablesViewNodeInfo* GetNodeInfo(ObjectID* variable,
@@ -82,6 +87,7 @@ private:
 private:
 			NodeInfoTable*		fNodeInfos;
 			StackFrameValues*	fValues;
+			ExpressionValues*	fExpressionValues;
 };