explorerframe: Implement GetNextItem.

dlls/explorerframe/nstc.c

@@ -1256,8 +1256,43 @@ static HRESULT WINAPI NSTC2_fnGetNextItem(INameSpaceTreeControl2* iface,
                                           IShellItem **ppsiNext)
 {
     NSTC2Impl *This = (NSTC2Impl*)iface;
-    FIXME("stub, %p (%p, %x, %p)\n", This, psi, nstcgi, ppsiNext);
-    return E_NOTIMPL;
+    HTREEITEM hitem, hnext;
+    UINT tvgn;
+    TRACE("%p (%p, %x, %p)\n", This, psi, nstcgi, ppsiNext);
+
+    if(!ppsiNext) return E_POINTER;
+    if(!psi)      return E_FAIL;
+
+    *ppsiNext = NULL;
+
+    hitem = treeitem_from_shellitem(This, psi);
+    if(!hitem)
+        return E_INVALIDARG;
+
+    switch(nstcgi)
+    {
+    case NSTCGNI_NEXT:         tvgn = TVGN_NEXT; break;
+    case NSTCGNI_NEXTVISIBLE:  tvgn = TVGN_NEXTVISIBLE; break;
+    case NSTCGNI_PREV:         tvgn = TVGN_PREVIOUS; break;
+    case NSTCGNI_PREVVISIBLE:  tvgn = TVGN_PREVIOUSVISIBLE; break;
+    case NSTCGNI_PARENT:       tvgn = TVGN_PARENT; break;
+    case NSTCGNI_CHILD:        tvgn = TVGN_CHILD; break;
+    case NSTCGNI_FIRSTVISIBLE: tvgn = TVGN_FIRSTVISIBLE; break;
+    case NSTCGNI_LASTVISIBLE:  tvgn = TVGN_LASTVISIBLE; break;
+    default:
+        FIXME("Unknown nstcgi value %d\n", nstcgi);
+        return E_FAIL;
+    }
+
+    hnext = (HTREEITEM)SendMessageW(This->hwnd_tv, TVM_GETNEXTITEM, tvgn, (WPARAM)hitem);
+    if(hnext)
+    {
+        *ppsiNext = shellitem_from_treeitem(This, hnext);
+        IShellItem_AddRef(*ppsiNext);
+        return S_OK;
+    }
+
+    return E_FAIL;
 }
 
 static HRESULT WINAPI NSTC2_fnHitTest(INameSpaceTreeControl2* iface,

dlls/explorerframe/tests/nstc.c

@@ -1329,6 +1329,7 @@ static void test_events(void)
     IOleWindow *pow;
     LPITEMIDLIST pidl_desktop;
     NSTCITEMSTATE itemstate;
+    IShellItem *psi;
     DWORD cookie1, cookie2;
     HWND hwnd_tv;
     HRESULT hr;
@@ -1797,6 +1798,59 @@ static void test_events(void)
     ok_event_count(pnstceimpl, OnItemDeleted, 1);
     ok_no_events(pnstceimpl);
 
+    /* GetNextItem */
+    hr = INameSpaceTreeControl_GetNextItem(pnstc, NULL, 0, NULL);
+    ok(hr == E_POINTER, "Got (0x%08x)\n", hr);
+    ok_no_events(pnstceimpl);
+
+    hr = INameSpaceTreeControl_GetNextItem(pnstc, psidesktop, 0, NULL);
+    ok(hr == E_POINTER, "Got (0x%08x)\n", hr);
+    ok_no_events(pnstceimpl);
+
+    hr = INameSpaceTreeControl_GetNextItem(pnstc, NULL, 0, &psi);
+    ok(hr == E_FAIL, "Got (0x%08x)\n", hr);
+    ok_no_events(pnstceimpl);
+
+    hr = INameSpaceTreeControl_GetNextItem(pnstc, psidesktop, 0, &psi);
+    ok(hr == E_INVALIDARG, "Got (0x%08x)\n", hr);
+    ok_no_events(pnstceimpl);
+
+    hr = INameSpaceTreeControl_AppendRoot(pnstc, psidesktop, SHCONTF_FOLDERS | SHCONTF_NONFOLDERS, 0, NULL);
+    ok(hr == S_OK, "Got (0x%08x)\n", hr);
+    process_msgs();
+    ok_event_count_broken(pnstceimpl, OnItemAdded, 1, 0 /* Vista */);
+    ok_no_events(pnstceimpl);
+
+    /* Get child from unexpanded and unfilled parent */
+    psi = (void*)0xDEADBEEF;
+    hr = INameSpaceTreeControl_GetNextItem(pnstc, psidesktop, NSTCGNI_CHILD, &psi);
+    ok(hr == E_FAIL, "Got (0x%08x)\n", hr);
+    ok(psi == NULL, "psi is %p\n", psi);
+    process_msgs();
+    ok_no_events(pnstceimpl);
+
+    /* Expand and try again */
+    hr = INameSpaceTreeControl_SetItemState(pnstc, psidesktop, NSTCIS_EXPANDED, 0xffff);
+    ok(hr == S_OK, "Got (0x%08x)\n", hr);
+    process_msgs();
+    ok_event_count(pnstceimpl, OnBeforeExpand, 1);
+    ok_event_broken(pnstceimpl, OnItemAdded); /* Does not fire on Vista */
+    ok_event_count(pnstceimpl, OnAfterExpand, 1);
+    todo_wine ok_event_count_broken(pnstceimpl, OnSelectionChanged, 1, 0 /*Vista */);
+    ok_no_events(pnstceimpl);
+    psi = (void*)0xDEADBEEF;
+    hr = INameSpaceTreeControl_GetNextItem(pnstc, psidesktop, NSTCGNI_CHILD, &psi);
+    ok(hr == S_OK, "Got (0x%08x)\n", hr);
+    ok((psi != NULL) && (psi != (void*)0xDEADBEEF), "psi is %p\n", psi);
+    process_msgs();
+    ok_no_events(pnstceimpl);
+    if(SUCCEEDED(hr)) IShellItem_Release(psi);
+
+    hr = INameSpaceTreeControl_RemoveAllRoots(pnstc);
+    ok(hr == S_OK, "Got (0x%08x)\n", hr);
+    ok_event_count(pnstceimpl, OnItemDeleted, 1);
+    ok_no_events(pnstceimpl);
+
     hr = INameSpaceTreeControl_QueryInterface(pnstc, &IID_IOleWindow, (void**)&pow);
     ok(hr == S_OK, "Got 0x%08x\n", hr);
     if(SUCCEEDED(hr))