1 files changed, 117 insertions, 2 deletions

diff --git a/fxjs/xfa/cjx_instancemanager.cpp b/fxjs/xfa/cjx_instancemanager.cpp
index 23048f98a5..86f8cf3e88 100644
--- a/fxjs/xfa/cjx_instancemanager.cpp
+++ b/fxjs/xfa/cjx_instancemanager.cpp
@@ -6,6 +6,7 @@
 
 #include "fxjs/xfa/cjx_instancemanager.h"
 
+#include <algorithm>
 #include <vector>
 
 #include "fxjs/cfxjse_engine.h"
@@ -31,6 +32,90 @@ CJX_InstanceManager::CJX_InstanceManager(CXFA_InstanceManager* mgr)
 
 CJX_InstanceManager::~CJX_InstanceManager() {}
 
+int32_t CJX_InstanceManager::SetInstances(int32_t iDesired) {
+  CXFA_OccurData occurData(GetXFANode()->GetOccurNode());
+  if (iDesired < occurData.GetMin()) {
+    ThrowTooManyOccurancesException(L"min");
+    return 1;
+  }
+
+  int32_t iMax = occurData.GetMax();
+  if (iMax >= 0 && iDesired > iMax) {
+    ThrowTooManyOccurancesException(L"max");
+    return 2;
+  }
+
+  int32_t iCount = GetXFANode()->GetCount();
+  if (iDesired == iCount)
+    return 0;
+
+  if (iDesired < iCount) {
+    WideString wsInstManagerName = GetCData(XFA_Attribute::Name);
+    WideString wsInstanceName = WideString(
+        wsInstManagerName.IsEmpty()
+            ? wsInstManagerName
+            : wsInstManagerName.Right(wsInstManagerName.GetLength() - 1));
+    uint32_t dInstanceNameHash =
+        FX_HashCode_GetW(wsInstanceName.AsStringView(), false);
+    CXFA_Node* pPrevSibling =
+        iDesired == 0 ? GetXFANode() : GetXFANode()->GetItem(iDesired - 1);
+    while (iCount > iDesired) {
+      CXFA_Node* pRemoveInstance =
+          pPrevSibling->GetNodeItem(XFA_NODEITEM_NextSibling);
+      if (pRemoveInstance->GetElementType() != XFA_Element::Subform &&
+          pRemoveInstance->GetElementType() != XFA_Element::SubformSet) {
+        continue;
+      }
+      if (pRemoveInstance->GetElementType() == XFA_Element::InstanceManager) {
+        NOTREACHED();
+        break;
+      }
+      if (pRemoveInstance->GetNameHash() == dInstanceNameHash) {
+        GetXFANode()->RemoveItem(pRemoveInstance, true);
+        iCount--;
+      }
+    }
+  } else {
+    while (iCount < iDesired) {
+      CXFA_Node* pNewInstance = GetXFANode()->CreateInstance(true);
+      GetXFANode()->InsertItem(pNewInstance, iCount, iCount, false);
+      iCount++;
+      CXFA_FFNotify* pNotify = GetDocument()->GetNotify();
+      if (!pNotify)
+        return 0;
+
+      pNotify->RunNodeInitialize(pNewInstance);
+    }
+  }
+
+  CXFA_LayoutProcessor* pLayoutPro = GetDocument()->GetLayoutProcessor();
+  if (pLayoutPro) {
+    pLayoutPro->AddChangedContainer(
+        ToNode(GetDocument()->GetXFAObject(XFA_HASHCODE_Form)));
+  }
+  return 0;
+}
+
+int32_t CJX_InstanceManager::MoveInstance(int32_t iTo, int32_t iFrom) {
+  int32_t iCount = GetXFANode()->GetCount();
+  if (iFrom > iCount || iTo > iCount - 1) {
+    ThrowIndexOutOfBoundsException();
+    return 1;
+  }
+  if (iFrom < 0 || iTo < 0 || iFrom == iTo)
+    return 0;
+
+  CXFA_Node* pMoveInstance = GetXFANode()->GetItem(iFrom);
+  GetXFANode()->RemoveItem(pMoveInstance, false);
+  GetXFANode()->InsertItem(pMoveInstance, iTo, iCount - 1, true);
+  CXFA_LayoutProcessor* pLayoutPro = GetDocument()->GetLayoutProcessor();
+  if (pLayoutPro) {
+    pLayoutPro->AddChangedContainer(
+        ToNode(GetDocument()->GetXFAObject(XFA_HASHCODE_Form)));
+  }
+  return 0;
+}
+
 CJS_Return CJX_InstanceManager::moveInstance(
     CJS_V8* runtime,
     const std::vector<v8::Local<v8::Value>>& params) {
@@ -39,7 +124,7 @@ CJS_Return CJX_InstanceManager::moveInstance(
 
   int32_t iFrom = runtime->ToInt32(params[0]);
   int32_t iTo = runtime->ToInt32(params[1]);
-  InstanceManager_MoveInstance(iTo, iFrom);
+  MoveInstance(iTo, iFrom);
 
   CXFA_FFNotify* pNotify = GetDocument()->GetNotify();
   if (!pNotify)
@@ -100,7 +185,7 @@ CJS_Return CJX_InstanceManager::setInstances(
   if (params.size() != 1)
     return CJS_Return(JSGetStringFromID(JSMessage::kParamError));
 
-  InstanceManager_SetInstances(runtime->ToInt32(params[0]));
+  SetInstances(runtime->ToInt32(params[0]));
   return CJS_Return(true);
 }
 
@@ -180,3 +265,33 @@ CJS_Return CJX_InstanceManager::insertInstance(
 
   return CJS_Return(value->DirectGetValue().Get(runtime->GetIsolate()));
 }
+
+void CJX_InstanceManager::max(CFXJSE_Value* pValue,
+                              bool bSetting,
+                              XFA_Attribute eAttribute) {
+  if (bSetting) {
+    ThrowInvalidPropertyException();
+    return;
+  }
+  pValue->SetInteger(CXFA_OccurData(GetXFANode()->GetOccurNode()).GetMax());
+}
+
+void CJX_InstanceManager::min(CFXJSE_Value* pValue,
+                              bool bSetting,
+                              XFA_Attribute eAttribute) {
+  if (bSetting) {
+    ThrowInvalidPropertyException();
+    return;
+  }
+  pValue->SetInteger(CXFA_OccurData(GetXFANode()->GetOccurNode()).GetMin());
+}
+
+void CJX_InstanceManager::count(CFXJSE_Value* pValue,
+                                bool bSetting,
+                                XFA_Attribute eAttribute) {
+  if (bSetting) {
+    pValue->SetInteger(GetXFANode()->GetCount());
+    return;
+  }
+  SetInstances(pValue->ToInteger());
+}