mshtml: Improved error handling in get_node calls.

dlls/mshtml/htmldoc.c

@@ -110,7 +110,9 @@ static HRESULT WINAPI HTMLDocument_get_all(IHTMLDocument2 *iface, IHTMLElementCo
 {
     HTMLDocument *This = HTMLDOC_THIS(iface);
     nsIDOMElement *nselem = NULL;
+    HTMLDOMNode *node;
     nsresult nsres;
+    HRESULT hres;
 
     TRACE("(%p)->(%p)\n", This, p);
 
@@ -125,14 +127,16 @@ static HRESULT WINAPI HTMLDocument_get_all(IHTMLDocument2 *iface, IHTMLElementCo
         return E_FAIL;
     }
 
-    if(nselem) {
-        *p = create_all_collection(get_node(This->doc_node, (nsIDOMNode*)nselem, TRUE), TRUE);
-        nsIDOMElement_Release(nselem);
-    }else {
+    if(!nselem) {
         *p = NULL;
+        return S_OK;
     }
 
-    return S_OK;
+    hres = get_node(This->doc_node, (nsIDOMNode*)nselem, TRUE, &node);
+    if(SUCCEEDED(hres))
+        *p = create_all_collection(node, TRUE);
+    nsIDOMElement_Release(nselem);
+    return hres;
 }
 
 static HRESULT WINAPI HTMLDocument_get_body(IHTMLDocument2 *iface, IHTMLElement **p)
@@ -140,6 +144,7 @@ static HRESULT WINAPI HTMLDocument_get_body(IHTMLDocument2 *iface, IHTMLElement
     HTMLDocument *This = HTMLDOC_THIS(iface);
     nsIDOMHTMLElement *nsbody = NULL;
     HTMLDOMNode *node;
+    HRESULT hres;
 
     TRACE("(%p)->(%p)\n", This, p);
 
@@ -153,17 +158,17 @@ static HRESULT WINAPI HTMLDocument_get_body(IHTMLDocument2 *iface, IHTMLElement
         }
     }
 
-    if(nsbody) {
-        node = get_node(This->doc_node, (nsIDOMNode*)nsbody, TRUE);
-        nsIDOMHTMLElement_Release(nsbody);
-
-        IHTMLDOMNode_QueryInterface(HTMLDOMNODE(node), &IID_IHTMLElement, (void**)p);
-    }else {
+    if(!nsbody) {
         *p = NULL;
+        return S_OK;
     }
 
-    TRACE("*p = %p\n", *p);
-    return S_OK;
+    hres = get_node(This->doc_node, (nsIDOMNode*)nsbody, TRUE, &node);
+    nsIDOMHTMLElement_Release(nsbody);
+    if(FAILED(hres))
+        return hres;
+
+    return IHTMLDOMNode_QueryInterface(HTMLDOMNODE(node), &IID_IHTMLElement, (void**)p);
 }
 
 static HRESULT WINAPI HTMLDocument_get_activeElement(IHTMLDocument2 *iface, IHTMLElement **p)

dlls/mshtml/htmldoc3.c

@@ -138,6 +138,7 @@ static HRESULT WINAPI HTMLDocument3_get_documentElement(IHTMLDocument3 *iface, I
     nsIDOMElement *nselem = NULL;
     HTMLDOMNode *node;
     nsresult nsres;
+    HRESULT hres;
 
     TRACE("(%p)->(%p)\n", This, p);
 
@@ -157,15 +158,17 @@ static HRESULT WINAPI HTMLDocument3_get_documentElement(IHTMLDocument3 *iface, I
         return E_FAIL;
     }
 
-    if(nselem) {
-        node = get_node(This->doc_node, (nsIDOMNode *)nselem, TRUE);
-        nsIDOMElement_Release(nselem);
-        IHTMLDOMNode_QueryInterface(HTMLDOMNODE(node), &IID_IHTMLElement, (void**)p);
-    }else {
+    if(!nselem) {
         *p = NULL;
+        return S_OK;
     }
 
-    return S_OK;
+    hres = get_node(This->doc_node, (nsIDOMNode *)nselem, TRUE, &node);
+    nsIDOMElement_Release(nselem);
+    if(FAILED(hres))
+        return hres;
+
+    return IHTMLDOMNode_QueryInterface(HTMLDOMNODE(node), &IID_IHTMLElement, (void**)p);
 }
 
 static HRESULT WINAPI HTMLDocument3_uniqueID(IHTMLDocument3 *iface, BSTR *p)
@@ -464,6 +467,7 @@ static HRESULT WINAPI HTMLDocument3_getElementById(IHTMLDocument3 *iface, BSTR v
     nsIDOMNodeList *nsnode_list;
     nsAString id_str;
     nsresult nsres;
+    HRESULT hres;
 
     TRACE("(%p)->(%s %p)\n", This, debugstr_w(v), pel);
 
@@ -528,15 +532,17 @@ static HRESULT WINAPI HTMLDocument3_getElementById(IHTMLDocument3 *iface, BSTR v
         nsnode = nsnode_by_name ? nsnode_by_name : nsnode_by_id;
 
     if(nsnode) {
-        node = get_node(This->doc_node, nsnode, TRUE);
+        hres = get_node(This->doc_node, nsnode, TRUE, &node);
         nsIDOMNode_Release(nsnode);
 
-        IHTMLDOMNode_QueryInterface(HTMLDOMNODE(node), &IID_IHTMLElement, (void**)pel);
+        if(SUCCEEDED(hres))
+            hres = IHTMLDOMNode_QueryInterface(HTMLDOMNODE(node), &IID_IHTMLElement, (void**)pel);
     }else {
         *pel = NULL;
+        hres = S_OK;
     }
 
-    return S_OK;
+    return hres;
 }
 
 

dlls/mshtml/htmlelemcol.c

@@ -480,6 +480,7 @@ static void create_all_list(HTMLDocumentNode *doc, HTMLDOMNode *elem, elem_vecto
     nsIDOMNode *iter;
     PRUint32 list_len = 0, i;
     nsresult nsres;
+    HRESULT hres;
 
     nsres = nsIDOMNode_GetChildNodes(elem->nsnode, &nsnode_list);
     if(NS_FAILED(nsres)) {
@@ -499,7 +500,13 @@ static void create_all_list(HTMLDocumentNode *doc, HTMLDOMNode *elem, elem_vecto
         }
 
         if(is_elem_node(iter)) {
-            HTMLDOMNode *node = get_node(doc, iter, TRUE);
+            HTMLDOMNode *node;
+
+            hres = get_node(doc, iter, TRUE, &node);
+            if(FAILED(hres)) {
+                FIXME("get_node failed: %08x\n", hres);
+                continue;
+            }
 
             elem_vector_add(buf, HTMLELEM_NODE_THIS(node));
             create_all_list(doc, node, buf);
@@ -524,7 +531,9 @@ IHTMLElementCollection *create_all_collection(HTMLDOMNode *node, BOOL include_ro
 IHTMLElementCollection *create_collection_from_nodelist(HTMLDocumentNode *doc, IUnknown *unk, nsIDOMNodeList *nslist)
 {
     PRUint32 length = 0, i;
+    HTMLDOMNode *node;
     elem_vector_t buf;
+    HRESULT hres;
 
     nsIDOMNodeList_GetLength(nslist, &length);
 
@@ -537,8 +546,12 @@ IHTMLElementCollection *create_collection_from_nodelist(HTMLDocumentNode *doc, I
 
         for(i=0; i<length; i++) {
             nsIDOMNodeList_Item(nslist, i, &nsnode);
-            if(is_elem_node(nsnode))
-                buf.buf[buf.len++] = HTMLELEM_NODE_THIS(get_node(doc, nsnode, TRUE));
+            if(is_elem_node(nsnode)) {
+                hres = get_node(doc, nsnode, TRUE, &node);
+                if(FAILED(hres))
+                    continue;
+                buf.buf[buf.len++] = HTMLELEM_NODE_THIS(node);
+            }
             nsIDOMNode_Release(nsnode);
         }
 
@@ -554,6 +567,8 @@ IHTMLElementCollection *create_collection_from_htmlcol(HTMLDocumentNode *doc, IU
 {
     PRUint32 length = 0, i;
     elem_vector_t buf;
+    HTMLDOMNode *node;
+    HRESULT hres = S_OK;
 
     nsIDOMHTMLCollection_GetLength(nscol, &length);
 
@@ -565,13 +580,21 @@ IHTMLElementCollection *create_collection_from_htmlcol(HTMLDocumentNode *doc, IU
 
         for(i=0; i<length; i++) {
             nsIDOMHTMLCollection_Item(nscol, i, &nsnode);
-            buf.buf[i] = HTMLELEM_NODE_THIS(get_node(doc, nsnode, TRUE));
+            hres = get_node(doc, nsnode, TRUE, &node);
             nsIDOMNode_Release(nsnode);
+            if(FAILED(hres))
+                break;
+            buf.buf[i] = HTMLELEM_NODE_THIS(node);
         }
     }else {
         buf.buf = NULL;
     }
 
+    if(FAILED(hres)) {
+        heap_free(buf.buf);
+        return NULL;
+    }
+
     return HTMLElementCollection_Create(unk, buf.buf, buf.len);
 }
 

dlls/mshtml/htmlevent.c

@@ -905,12 +905,18 @@ void fire_event(HTMLDocumentNode *doc, eventid_t eid, BOOL set_event, nsIDOMNode
     nsIDOMNode *parent, *nsnode;
     HTMLDOMNode *node;
     PRUint16 node_type;
+    HRESULT hres;
 
     TRACE("(%p) %s\n", doc, debugstr_w(event_info[eid].name));
 
     prev_event = doc->basedoc.window->event;
-    if(set_event)
-        event_obj = create_event(get_node(doc, target, TRUE), eid, nsevent);
+    if(set_event) {
+        hres = get_node(doc, target, TRUE, &node);
+        if(FAILED(hres))
+            return;
+
+        event_obj = create_event(node, eid, nsevent);
+    }
     doc->basedoc.window->event = event_obj;
 
     nsIDOMNode_GetNodeType(target, &node_type);
@@ -920,8 +926,8 @@ void fire_event(HTMLDocumentNode *doc, eventid_t eid, BOOL set_event, nsIDOMNode
     switch(node_type) {
     case ELEMENT_NODE:
         do {
-            node = get_node(doc, nsnode, FALSE);
-            if(node)
+            hres = get_node(doc, nsnode, FALSE, &node);
+            if(SUCCEEDED(hres) && node)
                 call_event_handlers(doc, event_obj, *get_node_event_target(node), node->cp_container, eid,
                         (IDispatch*)HTMLDOMNODE(node));
 
@@ -947,8 +953,8 @@ void fire_event(HTMLDocumentNode *doc, eventid_t eid, BOOL set_event, nsIDOMNode
 
             nsres = nsIDOMHTMLDocument_GetBody(doc->nsdoc, &nsbody);
             if(NS_SUCCEEDED(nsres) && nsbody) {
-                node = get_node(doc, (nsIDOMNode*)nsbody, FALSE);
-                if(node)
+                hres = get_node(doc, (nsIDOMNode*)nsbody, FALSE, &node);
+                if(SUCCEEDED(hres) && node)
                     call_event_handlers(doc, event_obj, *get_node_event_target(node), node->cp_container,
                             eid, (IDispatch*)HTMLDOMNODE(node));
                 nsIDOMHTMLElement_Release(nsbody);
@@ -1225,6 +1231,7 @@ void check_event_attr(HTMLDocumentNode *doc, nsIDOMElement *nselem)
     HTMLDOMNode *node;
     int i;
     nsresult nsres;
+    HRESULT hres;
 
     nsAString_Init(&attr_value_str, NULL);
     nsAString_Init(&attr_name_str, NULL);
@@ -1241,8 +1248,9 @@ void check_event_attr(HTMLDocumentNode *doc, nsIDOMElement *nselem)
 
             disp = script_parse_event(doc->basedoc.window, attr_value);
             if(disp) {
-                node = get_node(doc, (nsIDOMNode*)nselem, TRUE);
-                set_event_handler_disp(get_node_event_target(node), node->nsnode, node->doc, i, disp);
+                hres = get_node(doc, (nsIDOMNode*)nselem, TRUE, &node);
+                if(SUCCEEDED(hres))
+                    set_event_handler_disp(get_node_event_target(node), node->nsnode, node->doc, i, disp);
                 IDispatch_Release(disp);
             }
         }

dlls/mshtml/htmlform.c

@@ -47,6 +47,7 @@ static HRESULT htmlform_item(HTMLFormElement *This, int i, IDispatch **ret)
     nsIDOMNode *item;
     HTMLDOMNode *node;
     nsresult nsres;
+    HRESULT hres;
 
     nsres = nsIDOMHTMLFormElement_GetElements(This->nsform, &elements);
     if(NS_FAILED(nsres)) {
@@ -62,9 +63,9 @@ static HRESULT htmlform_item(HTMLFormElement *This, int i, IDispatch **ret)
     }
 
     if(item) {
-        node = get_node(This->element.node.doc, item, TRUE);
-        if(!node)
-            return E_OUTOFMEMORY;
+        hres = get_node(This->element.node.doc, item, TRUE, &node);
+        if(FAILED(hres))
+            return hres;
 
         IHTMLDOMNode_AddRef(HTMLDOMNODE(node));
         nsIDOMNode_Release(item);

dlls/mshtml/htmlnode.c

@@ -153,8 +153,10 @@ static HRESULT WINAPI HTMLDOMChildrenCollection_item(IHTMLDOMChildrenCollection
 {
     HTMLDOMChildrenCollection *This = HTMLCHILDCOL_THIS(iface);
     nsIDOMNode *nsnode = NULL;
+    HTMLDOMNode *node;
     PRUint32 length=0;
     nsresult nsres;
+    HRESULT hres;
 
     TRACE("(%p)->(%d %p)\n", This, index, ppItem);
 
@@ -173,7 +175,11 @@ static HRESULT WINAPI HTMLDOMChildrenCollection_item(IHTMLDOMChildrenCollection
         return E_FAIL;
     }
 
-    *ppItem = (IDispatch*)get_node(This->doc, nsnode, TRUE);
+    hres = get_node(This->doc, nsnode, TRUE, &node);
+    if(FAILED(hres))
+        return hres;
+
+    *ppItem = (IDispatch*)HTMLDOMNODE(node);
     IDispatch_AddRef(*ppItem);
     return S_OK;
 }
@@ -390,6 +396,7 @@ static HRESULT WINAPI HTMLDOMNode_get_parentNode(IHTMLDOMNode *iface, IHTMLDOMNo
     HTMLDOMNode *node;
     nsIDOMNode *nsnode;
     nsresult nsres;
+    HRESULT hres;
 
     TRACE("(%p)->(%p)\n", This, p);
 
@@ -404,7 +411,11 @@ static HRESULT WINAPI HTMLDOMNode_get_parentNode(IHTMLDOMNode *iface, IHTMLDOMNo
         return S_OK;
     }
 
-    node = get_node(This->doc, nsnode, TRUE);
+    hres = get_node(This->doc, nsnode, TRUE, &node);
+    nsIDOMNode_Release(nsnode);
+    if(FAILED(hres))
+        return hres;
+
     *p = HTMLDOMNODE(node);
     IHTMLDOMNode_AddRef(*p);
     return S_OK;
@@ -459,7 +470,9 @@ static HRESULT WINAPI HTMLDOMNode_insertBefore(IHTMLDOMNode *iface, IHTMLDOMNode
     HTMLDOMNode *This = HTMLDOMNODE_THIS(iface);
     nsIDOMNode *nsnode, *nsref = NULL;
     HTMLDOMNode *new_child;
+    HTMLDOMNode *node_obj;
     nsresult nsres;
+    HRESULT hres;
 
     TRACE("(%p)->(%p %s %p)\n", This, newChild, debugstr_variant(&refChild), node);
 
@@ -495,8 +508,12 @@ static HRESULT WINAPI HTMLDOMNode_insertBefore(IHTMLDOMNode *iface, IHTMLDOMNode
         return E_FAIL;
     }
 
-    *node = HTMLDOMNODE(get_node(This->doc, nsnode, TRUE));
+    hres = get_node(This->doc, nsnode, TRUE, &node_obj);
     nsIDOMNode_Release(nsnode);
+    if(FAILED(hres))
+        return hres;
+
+    *node = HTMLDOMNODE(node_obj);
     IHTMLDOMNode_AddRef(*node);
     return S_OK;
 }
@@ -508,6 +525,7 @@ static HRESULT WINAPI HTMLDOMNode_removeChild(IHTMLDOMNode *iface, IHTMLDOMNode
     HTMLDOMNode *node_obj;
     nsIDOMNode *nsnode;
     nsresult nsres;
+    HRESULT hres;
 
     TRACE("(%p)->(%p %p)\n", This, oldChild, node);
 
@@ -521,9 +539,13 @@ static HRESULT WINAPI HTMLDOMNode_removeChild(IHTMLDOMNode *iface, IHTMLDOMNode
         return E_FAIL;
     }
 
-    /* FIXME: Make sure that node != newChild */
-    *node = HTMLDOMNODE(get_node(This->doc, nsnode, TRUE));
+    hres = get_node(This->doc, nsnode, TRUE, &node_obj);
     nsIDOMNode_Release(nsnode);
+    if(FAILED(hres))
+        return hres;
+
+    /* FIXME: Make sure that node != newChild */
+    *node = HTMLDOMNODE(node_obj);
     IHTMLDOMNode_AddRef(*node);
     return S_OK;
 }
@@ -592,6 +614,7 @@ static HRESULT WINAPI HTMLDOMNode_appendChild(IHTMLDOMNode *iface, IHTMLDOMNode
     HTMLDOMNode *node_obj;
     nsIDOMNode *nsnode;
     nsresult nsres;
+    HRESULT hres;
 
     TRACE("(%p)->(%p %p)\n", This, newChild, node);
 
@@ -605,8 +628,13 @@ static HRESULT WINAPI HTMLDOMNode_appendChild(IHTMLDOMNode *iface, IHTMLDOMNode
         nsnode = node_obj->nsnode;
     }
 
+    hres = get_node(This->doc, nsnode, TRUE, &node_obj);
+    nsIDOMNode_Release(nsnode);
+    if(FAILED(hres))
+        return hres;
+
     /* FIXME: Make sure that node != newChild */
-    *node = HTMLDOMNODE(get_node(This->doc, nsnode, TRUE));
+    *node = HTMLDOMNODE(node_obj);
     IHTMLDOMNode_AddRef(*node);
     return S_OK;
 }
@@ -694,17 +722,24 @@ static HRESULT WINAPI HTMLDOMNode_get_firstChild(IHTMLDOMNode *iface, IHTMLDOMNo
 {
     HTMLDOMNode *This = HTMLDOMNODE_THIS(iface);
     nsIDOMNode *nschild = NULL;
+    HTMLDOMNode *node;
+    HRESULT hres;
 
     TRACE("(%p)->(%p)\n", This, p);
 
     nsIDOMNode_GetFirstChild(This->nsnode, &nschild);
-    if(nschild) {
-        *p = HTMLDOMNODE(get_node(This->doc, nschild, TRUE));
-        IHTMLDOMNode_AddRef(*p);
-    }else {
+    if(!nschild) {
         *p = NULL;
+        return S_OK;
     }
 
+    hres = get_node(This->doc, nschild, TRUE, &node);
+    nsIDOMNode_Release(nschild);
+    if(FAILED(hres))
+        return hres;
+
+    *p = HTMLDOMNODE(node);
+    IHTMLDOMNode_AddRef(*p);
     return S_OK;
 }
 
@@ -712,17 +747,24 @@ static HRESULT WINAPI HTMLDOMNode_get_lastChild(IHTMLDOMNode *iface, IHTMLDOMNod
 {
     HTMLDOMNode *This = HTMLDOMNODE_THIS(iface);
     nsIDOMNode *nschild = NULL;
+    HTMLDOMNode *node;
+    HRESULT hres;
 
     TRACE("(%p)->(%p)\n", This, p);
 
     nsIDOMNode_GetLastChild(This->nsnode, &nschild);
-    if(nschild) {
-        *p = HTMLDOMNODE(get_node(This->doc, nschild, TRUE));
-        IHTMLDOMNode_AddRef(*p);
-    }else {
+    if(!nschild) {
         *p = NULL;
+        return S_OK;
     }
 
+    hres = get_node(This->doc, nschild, TRUE, &node);
+    nsIDOMNode_Release(nschild);
+    if(FAILED(hres))
+        return hres;
+
+    *p = HTMLDOMNODE(node);
+    IHTMLDOMNode_AddRef(*p);
     return S_OK;
 }
 
@@ -737,17 +779,24 @@ static HRESULT WINAPI HTMLDOMNode_get_nextSibling(IHTMLDOMNode *iface, IHTMLDOMN
 {
     HTMLDOMNode *This = HTMLDOMNODE_THIS(iface);
     nsIDOMNode *nssibling = NULL;
+    HTMLDOMNode *node;
+    HRESULT hres;
 
     TRACE("(%p)->(%p)\n", This, p);
 
     nsIDOMNode_GetNextSibling(This->nsnode, &nssibling);
-    if(nssibling) {
-        *p = HTMLDOMNODE(get_node(This->doc, nssibling, TRUE));
-        IHTMLDOMNode_AddRef(*p);
-    }else {
+    if(!nssibling) {
         *p = NULL;
+        return S_OK;
     }
 
+    hres = get_node(This->doc, nssibling, TRUE, &node);
+    nsIDOMNode_Release(nssibling);
+    if(FAILED(hres))
+        return hres;
+
+    *p = HTMLDOMNODE(node);
+    IHTMLDOMNode_AddRef(*p);
     return S_OK;
 }
 
@@ -973,7 +1022,7 @@ static HTMLDOMNode *create_node(HTMLDocumentNode *doc, nsIDOMNode *nsnode)
  * (better) find a way to store HTMLDOMelement pointer in nsIDOMNode.
  */
 
-HTMLDOMNode *get_node(HTMLDocumentNode *This, nsIDOMNode *nsnode, BOOL create)
+HRESULT get_node(HTMLDocumentNode *This, nsIDOMNode *nsnode, BOOL create, HTMLDOMNode **ret)
 {
     HTMLDOMNode *iter = This->nodes;
 
@@ -983,10 +1032,13 @@ HTMLDOMNode *get_node(HTMLDocumentNode *This, nsIDOMNode *nsnode, BOOL create)
         iter = iter->next;
     }
 
-    if(iter || !create)
-        return iter;
+    if(iter || !create) {
+        *ret = iter;
+        return S_OK;
+    }
 
-    return create_node(This, nsnode);
+    *ret = create_node(This, nsnode);
+    return *ret ? S_OK : E_OUTOFMEMORY;
 }
 
 /*

dlls/mshtml/htmloption.c

@@ -466,6 +466,7 @@ static HRESULT WINAPI HTMLOptionElementFactory_create(IHTMLOptionElementFactory
 {
     HTMLOptionElementFactory *This = HTMLOPTFACTORY_THIS(iface);
     nsIDOMHTMLElement *nselem;
+    HTMLDOMNode *node;
     HRESULT hres;
 
     static const PRUnichar optionW[] = {'O','P','T','I','O','N',0};
@@ -484,9 +485,13 @@ static HRESULT WINAPI HTMLOptionElementFactory_create(IHTMLOptionElementFactory
     if(FAILED(hres))
         return hres;
 
-    hres = IHTMLDOMNode_QueryInterface(HTMLDOMNODE(get_node(This->window->doc, (nsIDOMNode*)nselem, TRUE)),
-            &IID_IHTMLOptionElement, (void**)optelem);
+    hres = get_node(This->window->doc, (nsIDOMNode*)nselem, TRUE, &node);
     nsIDOMHTMLElement_Release(nselem);
+    if(FAILED(hres))
+        return hres;
+
+    hres = IHTMLDOMNode_QueryInterface(HTMLDOMNODE(node),
+            &IID_IHTMLOptionElement, (void**)optelem);
 
     if(V_VT(&text) == VT_BSTR)
         IHTMLOptionElement_put_text(*optelem, V_BSTR(&text));

dlls/mshtml/htmlselect.c

@@ -47,6 +47,7 @@ static HRESULT htmlselect_item(HTMLSelectElement *This, int i, IDispatch **ret)
     nsIDOMHTMLOptionsCollection *nscol;
     nsIDOMNode *nsnode;
     nsresult nsres;
+    HRESULT hres;
 
     nsres = nsIDOMHTMLSelectElement_GetOptions(This->nsselect, &nscol);
     if(NS_FAILED(nsres)) {
@@ -64,12 +65,10 @@ static HRESULT htmlselect_item(HTMLSelectElement *This, int i, IDispatch **ret)
     if(nsnode) {
         HTMLDOMNode *node;
 
-        node = get_node(This->element.node.doc, nsnode, TRUE);
+        hres = get_node(This->element.node.doc, nsnode, TRUE, &node);
         nsIDOMNode_Release(nsnode);
-        if(!node) {
-            ERR("Could not find node\n");
-            return E_FAIL;
-        }
+        if(FAILED(hres))
+            return hres;
 
         IHTMLDOMNode_AddRef(HTMLDOMNODE(node));
         *ret = (IDispatch*)HTMLDOMNODE(node);

dlls/mshtml/mshtml_private.h

@@ -857,7 +857,7 @@ HRESULT HTMLElement_clone(HTMLDOMNode*,nsIDOMNode*,HTMLDOMNode**);
 HRESULT HTMLFrameBase_QI(HTMLFrameBase*,REFIID,void**);
 void HTMLFrameBase_destructor(HTMLFrameBase*);
 
-HTMLDOMNode *get_node(HTMLDocumentNode*,nsIDOMNode*,BOOL);
+HRESULT get_node(HTMLDocumentNode*,nsIDOMNode*,BOOL,HTMLDOMNode**);
 void release_nodes(HTMLDocumentNode*);
 
 void release_script_hosts(HTMLWindow*);

dlls/mshtml/mutation.c

@@ -275,14 +275,15 @@ static void bind_to_tree(HTMLDocumentNode *doc, nsISupports *nsiface)
     nsIDOMNode *nsnode;
     HTMLDOMNode *node;
     nsresult nsres;
+    HRESULT hres;
 
     nsres = nsISupports_QueryInterface(nsiface, &IID_nsIDOMNode, (void**)&nsnode);
     if(NS_FAILED(nsres))
         return;
 
-    node = get_node(doc, nsnode, TRUE);
+    hres = get_node(doc, nsnode, TRUE, &node);
     nsIDOMNode_Release(nsnode);
-    if(!node) {
+    if(FAILED(hres)) {
         ERR("Could not get node\n");
         return;
     }

dlls/mshtml/nsembed.c

@@ -1128,9 +1128,11 @@ static nsresult NSAPI nsContextMenuListener_OnShowContextMenu(nsIContextMenuList
 {
     NSContainer *This = NSCML_THIS(iface);
     nsIDOMMouseEvent *event;
+    HTMLDOMNode *node;
     POINT pt;
     DWORD dwID = CONTEXT_MENU_DEFAULT;
     nsresult nsres;
+    HRESULT hres;
 
     TRACE("(%p)->(%08x %p %p)\n", This, aContextFlags, aEvent, aNode);
 
@@ -1166,8 +1168,11 @@ static nsresult NSAPI nsContextMenuListener_OnShowContextMenu(nsIContextMenuList
         FIXME("aContextFlags=%08x\n", aContextFlags);
     };
 
-    show_context_menu(This->doc, dwID, &pt, (IDispatch*)HTMLDOMNODE(get_node(This->doc->basedoc.doc_node, aNode, TRUE)));
+    hres = get_node(This->doc->basedoc.doc_node, aNode, TRUE, &node);
+    if(FAILED(hres))
+        return NS_ERROR_FAILURE;
 
+    show_context_menu(This->doc, dwID, &pt, (IDispatch*)HTMLDOMNODE(node));
     return NS_OK;
 }
 

dlls/mshtml/txtrange.c

@@ -1190,6 +1190,7 @@ static HRESULT WINAPI HTMLTxtRange_parentElement(IHTMLTxtRange *iface, IHTMLElem
     HTMLTxtRange *This = HTMLTXTRANGE_THIS(iface);
     nsIDOMNode *nsnode, *tmp;
     HTMLDOMNode *node;
+    HRESULT hres;
 
     TRACE("(%p)->(%p)\n", This, parent);
 
@@ -1205,8 +1206,10 @@ static HRESULT WINAPI HTMLTxtRange_parentElement(IHTMLTxtRange *iface, IHTMLElem
         return S_OK;
     }
 
-    node = get_node(This->doc, nsnode, TRUE);
+    hres = get_node(This->doc, nsnode, TRUE, &node);
     nsIDOMNode_Release(nsnode);
+    if(FAILED(hres))
+        return hres;
 
     return IHTMLDOMNode_QueryInterface(HTMLDOMNODE(node), &IID_IHTMLElement, (void**)parent);
 }