Thomas Faber : shell32: Use QueryInterface in FolderView_GetFolder.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e582495927c253ddb5b6e5b01d3cf845207bdc10
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=e582495927c253ddb5b6e5b01d...

Author: Thomas Faber 
Date:   Mon Jun 29 15:39:25 2015 -0400

shell32: Use QueryInterface in FolderView_GetFolder.

test_IFolderView has a test that shows that the shell folder's reference
count before and after the call to IFolderView_GetFolder is the same.
However this is misleading because it is not a property of the
IFolderView_GetFolder method, but of the desktop shell folder object
that's used in the folder view. Windows <=2003 uses a cached object and
its AddRef/Release methods return constants.

---

dlls/shell32/pidl.c           |  1 +
 dlls/shell32/shlview.c        | 10 +---------
 dlls/shell32/tests/ebrowser.c |  2 +-
 dlls/shell32/tests/shlview.c  |  6 ++++++
 4 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/dlls/shell32/pidl.c b/dlls/shell32/pidl.c
index d16ca57..1856c12 100644
--- a/dlls/shell32/pidl.c
+++ b/dlls/shell32/pidl.c
@@ -1477,6 +1477,7 @@ HRESULT WINAPI SHGetIDListFromObject(IUnknown *punk, PIDLIST_ABSOLUTE *ppidl)
         {
             /* We might be able to get IPersistFolder2 from a shellfolder. */
             ret = SHGetIDListFromObject((IUnknown*)psf, ppidl);
+            IShellFolder_Release(psf);
         }
         IFolderView_Release(pfv);
         return ret;
diff --git a/dlls/shell32/shlview.c b/dlls/shell32/shlview.c
index e6691f8..b763468 100644
--- a/dlls/shell32/shlview.c
+++ b/dlls/shell32/shlview.c
@@ -2713,15 +2713,7 @@ static HRESULT WINAPI FolderView_GetFolder(IFolderView2 *iface, REFIID riid, voi

TRACE("(%p)->(%s, %p)\n", This, debugstr_guid(riid), ppv);

-    if (!ppv) return E_POINTER;
-
-    if (IsEqualIID(riid, &IID_IShellFolder))
-    {
-        *ppv = This->pSFParent;
-        return S_OK;
-    }
-
-    return E_NOINTERFACE;
+    return IShellFolder_QueryInterface(This->pSFParent, riid, ppv);
 }

static HRESULT WINAPI FolderView_Item(IFolderView2 *iface, int index, PITEMID_CHILD *ppidl)
diff --git a/dlls/shell32/tests/ebrowser.c b/dlls/shell32/tests/ebrowser.c
index 4c255a1..c9d81a4 100644
--- a/dlls/shell32/tests/ebrowser.c
+++ b/dlls/shell32/tests/ebrowser.c
@@ -1469,7 +1469,7 @@ static void test_navigation(void)
         test_browse_pidl_sb(peb2, &ebev, pidl_relative, SBSP_RELATIVE, S_OK, 1, 1, 0, 1);

ILFree(pidl_relative);
-        /* IShellFolder_Release(psf); */
+        IShellFolder_Release(psf);
         IFolderView_Release(pfv);
     }

diff --git a/dlls/shell32/tests/shlview.c b/dlls/shell32/tests/shlview.c
index 6525dd2..af57e60 100644
--- a/dlls/shell32/tests/shlview.c
+++ b/dlls/shell32/tests/shlview.c
@@ -688,6 +688,7 @@ static void test_IFolderView(void)
     IShellBrowser *browser;
     IFolderView2 *fv2;
     IFolderView *fv;
+    IUnknown *unk;
     HWND hwnd_view, hwnd_list;
     PITEMID_CHILD pidl;
     HRESULT hr;
@@ -830,6 +831,11 @@ if (0)
     ok(ref1 == ref2 || ref1 + 1 == ref2, /* >= vista */
        "expected same refcount, got %d\n", ref2);
     ok(desktop == folder, "\n");
+    if (folder) IShellFolder_Release(folder);
+
+    hr = IFolderView_GetFolder(fv, &IID_IUnknown, (void**)&unk);
+    ok(hr == S_OK, "got (0x%08x)\n", hr);
+    if (unk) IUnknown_Release(unk);

hr = IFolderView_QueryInterface(fv, &IID_IFolderView2, (void**)&fv2);
     if (hr != S_OK)