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-rw-r--r--fxjs/xfa/cjx_instancemanager.cpp29
-rw-r--r--fxjs/xfa/cjx_object.cpp4
2 files changed, 24 insertions, 9 deletions
diff --git a/fxjs/xfa/cjx_instancemanager.cpp b/fxjs/xfa/cjx_instancemanager.cpp
index d6ac66d9df..830541ed7c 100644
--- a/fxjs/xfa/cjx_instancemanager.cpp
+++ b/fxjs/xfa/cjx_instancemanager.cpp
@@ -58,8 +58,15 @@ int32_t CJX_InstanceManager::SetInstances(int32_t iDesired) {
: wsInstManagerName.Right(wsInstManagerName.GetLength() - 1));
uint32_t dInstanceNameHash =
FX_HashCode_GetW(wsInstanceName.AsStringView(), false);
- CXFA_Node* pPrevSibling =
- iDesired == 0 ? GetXFANode() : GetXFANode()->GetItem(iDesired - 1);
+ CXFA_Node* pPrevSibling = iDesired == 0
+ ? GetXFANode()
+ : GetXFANode()->GetItemIfExists(iDesired - 1);
+ if (!pPrevSibling) {
+ // TODO(dsinclair): Better error?
+ ThrowIndexOutOfBoundsException();
+ return 0;
+ }
+
while (iCount > iDesired) {
CXFA_Node* pRemoveInstance = pPrevSibling->GetNextSibling();
if (pRemoveInstance->GetElementType() != XFA_Element::Subform &&
@@ -109,7 +116,12 @@ int32_t CJX_InstanceManager::MoveInstance(int32_t iTo, int32_t iFrom) {
if (iFrom < 0 || iTo < 0 || iFrom == iTo)
return 0;
- CXFA_Node* pMoveInstance = GetXFANode()->GetItem(iFrom);
+ CXFA_Node* pMoveInstance = GetXFANode()->GetItemIfExists(iFrom);
+ if (!pMoveInstance) {
+ ThrowIndexOutOfBoundsException();
+ return 1;
+ }
+
GetXFANode()->RemoveItem(pMoveInstance, false);
GetXFANode()->InsertItem(pMoveInstance, iTo, iCount - 1, true);
CXFA_LayoutProcessor* pLayoutPro = GetDocument()->GetLayoutProcessor();
@@ -134,11 +146,11 @@ CJS_Return CJX_InstanceManager::moveInstance(
if (!pNotify)
return CJS_Return(true);
- CXFA_Node* pToInstance = GetXFANode()->GetItem(iTo);
+ CXFA_Node* pToInstance = GetXFANode()->GetItemIfExists(iTo);
if (pToInstance && pToInstance->GetElementType() == XFA_Element::Subform)
pNotify->RunSubformIndexChange(pToInstance);
- CXFA_Node* pFromInstance = GetXFANode()->GetItem(iFrom);
+ CXFA_Node* pFromInstance = GetXFANode()->GetItemIfExists(iFrom);
if (pFromInstance &&
pFromInstance->GetElementType() == XFA_Element::Subform) {
pNotify->RunSubformIndexChange(pFromInstance);
@@ -163,13 +175,16 @@ CJS_Return CJX_InstanceManager::removeInstance(
if (iCount - 1 < iMin)
return CJS_Return(JSGetStringFromID(JSMessage::kTooManyOccurances));
- CXFA_Node* pRemoveInstance = GetXFANode()->GetItem(iIndex);
+ CXFA_Node* pRemoveInstance = GetXFANode()->GetItemIfExists(iIndex);
+ if (!pRemoveInstance)
+ return CJS_Return(JSGetStringFromID(JSMessage::kParamError));
+
GetXFANode()->RemoveItem(pRemoveInstance, true);
CXFA_FFNotify* pNotify = GetDocument()->GetNotify();
if (pNotify) {
for (int32_t i = iIndex; i < iCount - 1; i++) {
- CXFA_Node* pSubformInstance = GetXFANode()->GetItem(i);
+ CXFA_Node* pSubformInstance = GetXFANode()->GetItemIfExists(i);
if (pSubformInstance &&
pSubformInstance->GetElementType() == XFA_Element::Subform) {
pNotify->RunSubformIndexChange(pSubformInstance);
diff --git a/fxjs/xfa/cjx_object.cpp b/fxjs/xfa/cjx_object.cpp
index cb76497618..8608cc0e8d 100644
--- a/fxjs/xfa/cjx_object.cpp
+++ b/fxjs/xfa/cjx_object.cpp
@@ -1629,12 +1629,12 @@ void CJX_Object::Script_Som_InstanceIndex(CFXJSE_Value* pValue,
if (!pNotify)
return;
- CXFA_Node* pToInstance = pManagerNode->GetItem(iTo);
+ CXFA_Node* pToInstance = pManagerNode->GetItemIfExists(iTo);
if (pToInstance && pToInstance->GetElementType() == XFA_Element::Subform) {
pNotify->RunSubformIndexChange(pToInstance);
}
- CXFA_Node* pFromInstance = pManagerNode->GetItem(iFrom);
+ CXFA_Node* pFromInstance = pManagerNode->GetItemIfExists(iFrom);
if (pFromInstance &&
pFromInstance->GetElementType() == XFA_Element::Subform) {
pNotify->RunSubformIndexChange(pFromInstance);