Relax range setting constraints for arrays.

- VariablesView now detects if a container's range is fixed or not,
and uses that to adjust both the prompt it displays and whether or not
the parsed ranges are bounds checked.
- ArrayValueNode now returns the currently user-set range rather than
the dimension constraints, since those might not always be accurate.

src/apps/debugger/user_interface/gui/team_window/VariablesView.cpp

@@ -1593,11 +1593,17 @@ VariablesView::MessageReceived(BMessage* message)
 				->SelectionModel()->NodeAt(0);
 			int32 lowerBound, upperBound;
 			ValueNode* valueNode = node->NodeChild()->Node();
-			if (!valueNode->IsRangedContainer())
+			if (!valueNode->IsRangedContainer()) {
 				valueNode = node->ChildAt(0)->NodeChild()->Node();
+				if (!valueNode->IsRangedContainer())
+					break;
+			}
 
-			if (valueNode->SupportedChildRange(lowerBound, upperBound) != B_OK)
+			bool fixedRange = valueNode->IsContainerRangeFixed();
+			if (valueNode->SupportedChildRange(lowerBound, upperBound)
+				!= B_OK) {
 				break;
+			}
 
 			BMessage* promptMessage = new(std::nothrow) BMessage(
 				MSG_SET_CONTAINER_RANGE);
@@ -1606,9 +1612,16 @@ VariablesView::MessageReceived(BMessage* message)
 
 			ObjectDeleter<BMessage> messageDeleter(promptMessage);
 			promptMessage->AddPointer("node", node);
+			promptMessage->AddBool("fixedRange", fixedRange);
 			BString infoText;
-			infoText.SetToFormat("Allowed range: %" B_PRId32
-				"-%" B_PRId32 ".", lowerBound, upperBound);
+			if (fixedRange) {
+				infoText.SetToFormat("Allowed range: %" B_PRId32
+					"-%" B_PRId32 ".", lowerBound, upperBound);
+			} else {
+				infoText.SetToFormat("Current range: %" B_PRId32
+					"-%" B_PRId32 ".", lowerBound, upperBound);
+			}
+
 			PromptWindow* promptWindow = new(std::nothrow) PromptWindow(
 				"Set Range", "Range: ", infoText.String(), BMessenger(this),
 				promptMessage);
@@ -1631,13 +1644,15 @@ VariablesView::MessageReceived(BMessage* message)
 			if (valueNode->SupportedChildRange(lowerBound, upperBound) != B_OK)
 				break;
 
+			bool fixedRange = message->FindBool("fixedRange");
+
 			BString rangeExpression = message->FindString("text");
 			if (rangeExpression.Length() == 0)
 				break;
 
 			RangeList ranges;
 			status_t result = UiUtils::ParseRangeExpression(
-				rangeExpression, lowerBound, upperBound, ranges);
+				rangeExpression, lowerBound, upperBound, fixedRange, ranges);
 			if (result != B_OK)
 				break;
 

src/apps/debugger/user_interface/util/UiUtils.cpp

@@ -411,7 +411,7 @@ static status_t ParseRangeString(BString& rangeString, int32& lowerBound,
 
 /*static*/ status_t
 UiUtils::ParseRangeExpression(const BString& rangeExpression, int32 lowerBound,
-	int32 upperBound, RangeList& _output)
+	int32 upperBound, bool fixedRange, RangeList& _output)
 {
 	if (rangeExpression.IsEmpty())
 		return B_BAD_DATA;
@@ -440,7 +440,8 @@ UiUtils::ParseRangeExpression(const BString& rangeExpression, int32 lowerBound,
 		if (result != B_OK)
 			return result;
 
-		if (lowValue < lowerBound || highValue > upperBound)
+
+		if (fixedRange && (lowValue < lowerBound || highValue > upperBound))
 			return B_BAD_VALUE;
 
 		result = _output.AddRange(lowValue, highValue);

src/apps/debugger/user_interface/util/UiUtils.h

@@ -55,6 +55,7 @@ public:
 	static	status_t			ParseRangeExpression(
 									const BString& rangeString,
 									int32 lowerBound, int32 upperBound,
+									bool fixedRange,
 									RangeList& _output);
 };
 

src/apps/debugger/value/value_nodes/ArrayValueNode.cpp

@@ -31,7 +31,10 @@ AbstractArrayValueNode::AbstractArrayValueNode(ValueNodeChild* nodeChild,
 	:
 	ValueNode(nodeChild),
 	fType(type),
-	fDimension(dimension)
+	fDimension(dimension),
+	fLowerBound(0),
+	fUpperBound(0),
+	fBoundsInitialized(false)
 {
 	fType->AcquireReference();
 }
@@ -106,6 +109,8 @@ void
 AbstractArrayValueNode::ClearChildren()
 {
 	fChildren.MakeEmpty();
+	fLowerBound = 0;
+	fUpperBound = 0;
 	if (fContainer != NULL)
 		fContainer->NotifyValueNodeChildrenDeleted(this);
 }
@@ -121,14 +126,22 @@ AbstractArrayValueNode::CreateChildrenInRange(int32 lowIndex,
 
 	int32 dimensionCount = fType->CountDimensions();
 	bool isFinalDimension = fDimension + 1 == dimensionCount;
+	status_t error = B_OK;
 
-	int32 lowerBound, upperBound;
-	if (SupportedChildRange(lowerBound, upperBound) == B_OK) {
-		// clamp inputs to supported range.
-		if (lowIndex < lowerBound)
-			lowIndex = lowerBound;
-		if (highIndex > upperBound)
-			highIndex = upperBound;
+	if (!fBoundsInitialized) {
+		int32 lowerBound, upperBound;
+		error = SupportedChildRange(lowerBound, upperBound);
+		if (error != B_OK)
+			return error;
+
+		fLowerBound = lowerBound;
+		fUpperBound = upperBound;
+		fBoundsInitialized = true;
+	} else {
+		if (lowIndex < fLowerBound)
+			fLowerBound = lowIndex;
+		if (highIndex > fUpperBound)
+			fUpperBound = highIndex;
 	}
 
 	// create children for the array elements
@@ -166,19 +179,23 @@ status_t
 AbstractArrayValueNode::SupportedChildRange(int32& lowIndex,
 	int32& highIndex) const
 {
-	ArrayDimension* dimension = fType->DimensionAt(fDimension);
+	if (!fBoundsInitialized) {
+		ArrayDimension* dimension = fType->DimensionAt(fDimension);
 
-	SubrangeType* dimensionType = dynamic_cast<SubrangeType*>(
-		dimension->GetType());
+		SubrangeType* dimensionType = dynamic_cast<SubrangeType*>(
+			dimension->GetType());
 
-	if (dimensionType != NULL) {
-		lowIndex = dimensionType->LowerBound().ToInt32();
-		highIndex = dimensionType->UpperBound().ToInt32();
-
-		return B_OK;
+		if (dimensionType != NULL) {
+			lowIndex = dimensionType->LowerBound().ToInt32();
+			highIndex = dimensionType->UpperBound().ToInt32();
+		} else
+			return B_UNSUPPORTED;
+	} else {
+		lowIndex = fLowerBound;
+		highIndex = fUpperBound;
 	}
 
-	return B_UNSUPPORTED;
+	return B_OK;
 }
 
 

src/apps/debugger/value/value_nodes/ArrayValueNode.h

@@ -54,6 +54,9 @@ protected:
 			ArrayType*			fType;
 			ChildList			fChildren;
 			int32				fDimension;
+			int32				fLowerBound;
+			int32				fUpperBound;
+			bool				fBoundsInitialized;
 };