[RAPPS] listview refactor (#2970)

This makes it easier to maintain the listview, and better separates the application list and listview.

* [RAPPS] fix memory leak when cleanup. some renaming are also done
* [RAPPS] move the code adding apps info inside class CAppsListView
* [RAPPS] add table view, create listview and AppInfoDisplay inside it
* [RAPPS] rename INSTALLED_INFO as CInstalledApplicationInfo
now it corresponds with CAvailableApplicationInfo
* [RAPPS] add CInstalledApps
* [RAPPS] optimize the speed when refreshing listview
* [RAPPS] correctly handle Enum for InstalledApps
* [RAPPS] make check all working properly (this also fixes some bugs)
the old version has some bugs when check all items after switching tags in tree-view
* [RAPPS] add handling for wow64
* [RAPPS] use an inline function to replace INSERT_TEXT macro
* [RAPPS] fix the bug that StatusBar won't update when switching tags
* [RAPPS] now TableView always reset bIsAscending in SetDisplayMode
* [RAPPS] rename TableView to ApplicationView
* [RAPPS] now bIsAscending would be reset when switching column in listview

base/applications/rapps/available.cpp

@@ -19,7 +19,7 @@
 
  // CAvailableApplicationInfo
 CAvailableApplicationInfo::CAvailableApplicationInfo(const ATL::CStringW& sFileNameParam, AvailableStrings& AvlbStrings)
-    : m_IsSelected(FALSE), m_LicenseType(LICENSE_NONE), m_SizeBytes(0), m_sFileName(sFileNameParam),
+    : m_LicenseType(LICENSE_NONE), m_SizeBytes(0), m_sFileName(sFileNameParam),
     m_IsInstalled(FALSE), m_HasLanguageInfo(FALSE), m_HasInstalledVersion(FALSE)
 {
     RetrieveGeneralInfo(AvlbStrings);
@@ -400,71 +400,127 @@ BOOL CAvailableApps::ForceUpdateAppsDB()
 
 BOOL CAvailableApps::Enum(INT EnumType, AVAILENUMPROC lpEnumProc, PVOID param)
 {
-
-    HANDLE hFind = INVALID_HANDLE_VALUE;
-    WIN32_FIND_DATAW FindFileData;
-
-    hFind = FindFirstFileW(m_Strings.szSearchPath.GetString(), &FindFileData);
-
-    if (hFind == INVALID_HANDLE_VALUE)
+    if (EnumType == ENUM_CAT_SELECTED)
     {
-        //no db yet
-        return FALSE;
-    }
+        CAvailableApplicationInfo *EnumAvlbInfo = NULL;
 
-    do
-    {
-        // loop for all the cached entries
-        POSITION CurrentListPosition = m_InfoList.GetHeadPosition();
-        CAvailableApplicationInfo* Info = NULL;
-
-        while (CurrentListPosition != NULL)
+        // enum all object in m_SelectedList and invoke callback
+        for(POSITION CurrentPosition = m_SelectedList.GetHeadPosition();
+            CurrentPosition && (EnumAvlbInfo = m_SelectedList.GetAt(CurrentPosition));
+            m_SelectedList.GetNext(CurrentPosition))
         {
-            POSITION LastListPosition = CurrentListPosition;
-            Info = m_InfoList.GetNext(CurrentListPosition);
-
-            // do we already have this entry in cache?
-            if (Info->m_sFileName == FindFileData.cFileName)
-            {
-                // is it current enough, or the file has been modified since our last time here?
-                if (CompareFileTime(&FindFileData.ftLastWriteTime, &Info->m_ftCacheStamp) == 1)
-                {
-                    // recreate our cache, this is the slow path
-                    m_InfoList.RemoveAt(LastListPosition);
-
-                    delete Info;
-                    Info = NULL;
-                    break;
-                }
-                else
-                {
-                    // speedy path, compare directly, we already have the data
-                    goto skip_if_cached;
-                }
-            }
-        }
-
-        // create a new entry
-        Info = new CAvailableApplicationInfo(FindFileData.cFileName, m_Strings);
-
-        // set a timestamp for the next time
-        Info->SetLastWriteTime(&FindFileData.ftLastWriteTime);
-        m_InfoList.AddTail(Info);
-
-skip_if_cached:
-        if (EnumType == Info->m_Category
-            || EnumType == ENUM_ALL_AVAILABLE
-            || (EnumType == ENUM_CAT_SELECTED && Info->m_IsSelected))
-        {
-            Info->RefreshAppInfo(m_Strings);
+            EnumAvlbInfo->RefreshAppInfo(m_Strings);
 
             if (lpEnumProc)
-                lpEnumProc(Info, m_Strings.szAppsPath.GetString(), param);
+                lpEnumProc(EnumAvlbInfo, TRUE, param);
         }
-    } while (FindNextFileW(hFind, &FindFileData) != 0);
+        return TRUE;
+    }
+    else
+    {
+        HANDLE hFind = INVALID_HANDLE_VALUE;
+        WIN32_FIND_DATAW FindFileData;
 
-    FindClose(hFind);
-    return TRUE;
+        hFind = FindFirstFileW(m_Strings.szSearchPath.GetString(), &FindFileData);
+
+        if (hFind == INVALID_HANDLE_VALUE)
+        {
+            //no db yet
+            return FALSE;
+        }
+
+        do
+        {
+            // loop for all the cached entries
+            POSITION CurrentListPosition = m_InfoList.GetHeadPosition();
+            CAvailableApplicationInfo *Info = NULL;
+
+            while (CurrentListPosition != NULL)
+            {
+                POSITION LastListPosition = CurrentListPosition;
+                Info = m_InfoList.GetNext(CurrentListPosition);
+
+                // do we already have this entry in cache?
+                if (Info->m_sFileName == FindFileData.cFileName)
+                {
+                    // is it current enough, or the file has been modified since our last time here?
+                    if (CompareFileTime(&FindFileData.ftLastWriteTime, &Info->m_ftCacheStamp) == 1)
+                    {
+                        // recreate our cache, this is the slow path
+                        m_InfoList.RemoveAt(LastListPosition);
+
+                        // also remove this in selected list (if exist)
+                        RemoveSelected(Info);
+
+                        delete Info;
+                        Info = NULL;
+                        break;
+                    }
+                    else
+                    {
+                        // speedy path, compare directly, we already have the data
+                        goto skip_if_cached;
+                    }
+                }
+            }
+
+            // create a new entry
+            Info = new CAvailableApplicationInfo(FindFileData.cFileName, m_Strings);
+
+            // set a timestamp for the next time
+            Info->SetLastWriteTime(&FindFileData.ftLastWriteTime);
+            m_InfoList.AddTail(Info);
+
+        skip_if_cached:
+            if (EnumType == Info->m_Category
+                || EnumType == ENUM_ALL_AVAILABLE)
+            {
+                Info->RefreshAppInfo(m_Strings);
+
+                if (lpEnumProc)
+                {
+                    if (m_SelectedList.Find(Info))
+                    {
+                        lpEnumProc(Info, TRUE, param);
+                    }
+                    else
+                    {
+                        lpEnumProc(Info, FALSE, param);
+                    }
+                }
+            }
+        } while (FindNextFileW(hFind, &FindFileData));
+
+        FindClose(hFind);
+        return TRUE;
+    }
+}
+
+BOOL CAvailableApps::AddSelected(CAvailableApplicationInfo *AvlbInfo)
+{
+        return m_SelectedList.AddTail(AvlbInfo) != 0;
+}
+
+BOOL CAvailableApps::RemoveSelected(CAvailableApplicationInfo *AvlbInfo)
+{
+    POSITION Position = m_SelectedList.Find(AvlbInfo);
+    if (Position)
+    {
+        m_SelectedList.RemoveAt(Position);
+        return TRUE;
+    }
+    return FALSE;
+}
+
+VOID CAvailableApps::RemoveAllSelected()
+{
+    m_SelectedList.RemoveAll();
+    return;
+}
+
+int CAvailableApps::GetSelectedCount()
+{
+    return m_SelectedList.GetCount();
 }
 
 CAvailableApplicationInfo* CAvailableApps::FindInfo(const ATL::CStringW& szAppName) const
@@ -502,23 +558,6 @@ ATL::CSimpleArray<CAvailableApplicationInfo> CAvailableApps::FindInfoList(const
     return result;
 }
 
-ATL::CSimpleArray<CAvailableApplicationInfo> CAvailableApps::GetSelected() const
-{
-    ATL::CSimpleArray<CAvailableApplicationInfo> result;
-    POSITION CurrentListPosition = m_InfoList.GetHeadPosition();
-    CAvailableApplicationInfo* Info;
-
-    while (CurrentListPosition != NULL)
-    {
-        Info = m_InfoList.GetNext(CurrentListPosition);
-        if (Info->m_IsSelected)
-        {
-            result.Add(*Info);
-        }
-    }
-    return result;
-}
-
 const ATL::CStringW& CAvailableApps::GetFolderPath() const
 {
     return m_Strings.szPath;

base/applications/rapps/include/available.h

@@ -37,10 +37,11 @@ struct AvailableStrings
     AvailableStrings();
 };
 
-struct CAvailableApplicationInfo
+class CAvailableApplicationInfo
 {
+public:
     INT m_Category;
-    BOOL m_IsSelected;
+    //BOOL m_IsSelected;
     LicenseType m_LicenseType;
     ATL::CStringW m_szName;
     ATL::CStringW m_szRegName;
@@ -98,11 +99,12 @@ private:
     inline BOOL FindInLanguages(LCID what) const;
 };
 
-typedef BOOL(CALLBACK *AVAILENUMPROC)(CAvailableApplicationInfo *Info, LPCWSTR szFolderPath, PVOID param);
+typedef BOOL(CALLBACK *AVAILENUMPROC)(CAvailableApplicationInfo *Info, BOOL bInitialCheckState, PVOID param);
 
 class CAvailableApps
 {
     ATL::CAtlList<CAvailableApplicationInfo*> m_InfoList;
+    ATL::CAtlList< CAvailableApplicationInfo*> m_SelectedList;
 
 public:
     static AvailableStrings m_Strings;
@@ -116,9 +118,15 @@ public:
     VOID FreeCachedEntries();
     BOOL Enum(INT EnumType, AVAILENUMPROC lpEnumProc, PVOID param);
 
+    BOOL AddSelected(CAvailableApplicationInfo *AvlbInfo);
+    BOOL RemoveSelected(CAvailableApplicationInfo *AvlbInfo);
+
+    VOID RemoveAllSelected();
+    int GetSelectedCount();
+
     CAvailableApplicationInfo* FindInfo(const ATL::CStringW& szAppName) const;
     ATL::CSimpleArray<CAvailableApplicationInfo> FindInfoList(const ATL::CSimpleArray<ATL::CStringW> &arrAppsNames) const;
-    ATL::CSimpleArray<CAvailableApplicationInfo> GetSelected() const;
+    //ATL::CSimpleArray<CAvailableApplicationInfo> GetSelected() const;
 
     const ATL::CStringW& GetFolderPath() const;
     const ATL::CStringW& GetAppPath() const;

base/applications/rapps/include/installed.h

@@ -3,19 +3,51 @@
 #include <windef.h>
 #include <atlstr.h>
 
-struct INSTALLED_INFO
+class CInstalledApplicationInfo
 {
-    HKEY hRootKey;
+public:
+    BOOL IsUserKey;
+    REGSAM WowKey;
     HKEY hSubKey;
+    BOOL bIsUpdate = FALSE;
+
     ATL::CStringW szKeyName;
 
+    CInstalledApplicationInfo(BOOL bIsUserKey, REGSAM RegWowKey, HKEY hKey);
     BOOL GetApplicationString(LPCWSTR lpKeyName, ATL::CStringW& String);
+    BOOL UninstallApplication(BOOL bModify);
+    LSTATUS RemoveFromRegistry();
+
+    ATL::CStringW szDisplayName;
+    ATL::CStringW szDisplayVersion;
+    ATL::CStringW szPublisher;
+    ATL::CStringW szRegOwner;
+    ATL::CStringW szProductID;
+    ATL::CStringW szHelpLink;
+    ATL::CStringW szHelpTelephone;
+    ATL::CStringW szReadme;
+    ATL::CStringW szContact;
+    ATL::CStringW szURLUpdateInfo;
+    ATL::CStringW szURLInfoAbout;
+    ATL::CStringW szComments;
+    ATL::CStringW szInstallDate;
+    ATL::CStringW szInstallLocation;
+    ATL::CStringW szInstallSource;
+    ATL::CStringW szUninstallString;
+    ATL::CStringW szModifyPath;
+
+    ~CInstalledApplicationInfo();
 };
 
-typedef INSTALLED_INFO *PINSTALLED_INFO;
-typedef BOOL(CALLBACK *APPENUMPROC)(INT ItemIndex, ATL::CStringW &Name, PINSTALLED_INFO Info, PVOID param);
+typedef BOOL(CALLBACK *APPENUMPROC)(CInstalledApplicationInfo * Info, PVOID param);
 
-BOOL EnumInstalledApplications(INT EnumType, BOOL IsUserKey, APPENUMPROC lpEnumProc, PVOID param);
-BOOL GetApplicationString(HKEY hKey, LPCWSTR lpKeyName, LPWSTR szString);
+class CInstalledApps
+{
+    ATL::CAtlList<CInstalledApplicationInfo *> m_InfoList;
+
+public:
+    BOOL Enum(INT EnumType, APPENUMPROC lpEnumProc, PVOID param);
+
+    VOID FreeCachedEntries();
+};
 
-BOOL UninstallApplication(PINSTALLED_INFO ItemInfo, BOOL bModify);

base/applications/rapps/include/misc.h

@@ -46,3 +46,5 @@ public:
 };
 
 BOOL PathAppendNoDirEscapeW(LPWSTR pszPath, LPCWSTR pszMore);
+
+BOOL IsSystem64Bit();

base/applications/rapps/include/rosui.h

@@ -495,7 +495,10 @@ public:
 
     virtual ~CUiWindow()
     {
-        T::DestroyWindow();
+        if (T::IsWindow())
+        {
+            T::DestroyWindow();
+        }
     }
 
     VOID GetWindowTextW(ATL::CStringW& szText)

base/applications/rapps/installed.cpp

@@ -12,149 +12,253 @@
 
 #include "misc.h"
 
-BOOL INSTALLED_INFO::GetApplicationString(LPCWSTR lpKeyName, ATL::CStringW& String)
+CInstalledApplicationInfo::CInstalledApplicationInfo(BOOL bIsUserKey, REGSAM RegWowKey, HKEY hKey)
+    : IsUserKey(bIsUserKey), WowKey(RegWowKey), hSubKey(hKey)
 {
-    BOOL result = ::GetApplicationString(hSubKey, lpKeyName, String.GetBuffer(MAX_PATH));
-    String.ReleaseBuffer();
-    return result;
-}
+    // if Initialize failed, hSubKey will be closed automatically and set to zero
 
-BOOL GetApplicationString(HKEY hKey, LPCWSTR lpKeyName, LPWSTR szString)
-{
-    DWORD dwSize = MAX_PATH * sizeof(WCHAR);
+    DWORD dwSize = MAX_PATH, dwType, dwValue;
+    BOOL bIsSystemComponent;
+    ATL::CStringW szParentKeyName;
 
-    if (RegQueryValueExW(hKey,
-                         lpKeyName,
-                         NULL,
-                         NULL,
-                         (LPBYTE) szString,
-                         &dwSize) == ERROR_SUCCESS)
+    dwType = REG_DWORD;
+    dwSize = sizeof(DWORD);
+
+    if (RegQueryValueExW(hSubKey,
+        L"SystemComponent",
+        NULL,
+        &dwType,
+        (LPBYTE)&dwValue,
+        &dwSize) == ERROR_SUCCESS)
     {
-        return TRUE;
+        bIsSystemComponent = (dwValue == 0x1);
+    }
+    else
+    {
+        bIsSystemComponent = FALSE;
     }
-
-    StringCchCopyW(szString, MAX_PATH, L"---");
-    return FALSE;
-}
-
-BOOL UninstallApplication(PINSTALLED_INFO ItemInfo, BOOL bModify)
-{
-    LPCWSTR szModify = L"ModifyPath";
-    LPCWSTR szUninstall = L"UninstallString";
-    DWORD dwType, dwSize;
-    WCHAR szPath[MAX_PATH];
 
     dwType = REG_SZ;
     dwSize = MAX_PATH * sizeof(WCHAR);
-    if (RegQueryValueExW(ItemInfo->hSubKey,
-                         bModify ? szModify : szUninstall,
-                         NULL,
-                         &dwType,
-                         (LPBYTE) szPath,
-                         &dwSize) != ERROR_SUCCESS)
+    bIsUpdate = (RegQueryValueExW(hSubKey,
+        L"ParentKeyName",
+        NULL,
+        &dwType,
+        (LPBYTE)szParentKeyName.GetBuffer(MAX_PATH),
+        &dwSize) == ERROR_SUCCESS);
+    szParentKeyName.ReleaseBuffer();
+
+    if (bIsSystemComponent)
     {
-        return FALSE;
+        CloseHandle(hSubKey);
+        hSubKey = NULL;
     }
 
-    return StartProcess(szPath, TRUE);
 }
 
-BOOL EnumInstalledApplications(INT EnumType, BOOL IsUserKey, APPENUMPROC lpEnumProc, PVOID param)
+CInstalledApplicationInfo::~CInstalledApplicationInfo()
 {
-    DWORD dwSize = MAX_PATH, dwType, dwValue;
-    BOOL bIsSystemComponent, bIsUpdate;
-    ATL::CStringW szParentKeyName;
-    ATL::CStringW szDisplayName;
-    INSTALLED_INFO Info;
-    HKEY hKey;
-    LONG ItemIndex = 0;
+    if (hSubKey)
+    {
+        CloseHandle(hSubKey);
+        hSubKey = NULL;
+    }
+}
 
-    Info.hRootKey = IsUserKey ? HKEY_CURRENT_USER : HKEY_LOCAL_MACHINE;
+BOOL CInstalledApplicationInfo::GetApplicationString(LPCWSTR lpKeyName, ATL::CStringW& String)
+{
+    DWORD dwSize = 0;
+    String.Empty();
+    DWORD dwType;
 
-    if (RegOpenKeyW(Info.hRootKey,
-                    L"Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall",
-                    &hKey) != ERROR_SUCCESS)
+    // retrieve the size of value first.
+    if (RegQueryValueExW(hSubKey,
+        lpKeyName,
+        NULL,
+        &dwType,
+        NULL,
+        &dwSize) != ERROR_SUCCESS)
     {
         return FALSE;
     }
 
-    while (RegEnumKeyExW(hKey, ItemIndex, Info.szKeyName.GetBuffer(MAX_PATH), &dwSize, NULL, NULL, NULL, NULL) == ERROR_SUCCESS)
+    // TODO: I assume the type as REG_SZ. but I think REG_EXPAND_SZ should be handled correctly too.
+    if (dwType != REG_SZ)
     {
-        Info.szKeyName.ReleaseBuffer();
-        if (RegOpenKeyW(hKey, Info.szKeyName.GetString(), &Info.hSubKey) == ERROR_SUCCESS)
+        return FALSE;
+    }
+
+    // allocate buffer.
+    // attention: dwSize is size in bytes, and RegQueryValueExW does not guarantee the terminating null character.
+    String.GetBuffer(dwSize + sizeof(WCHAR));
+
+    // query the value
+    if (RegQueryValueExW(hSubKey,
+        lpKeyName,
+        NULL,
+        NULL,
+        (LPBYTE)String.GetBuffer(),
+        &dwSize) != ERROR_SUCCESS)
+    {
+        String.ReleaseBuffer();
+        String.Empty();
+        return FALSE;
+    }
+    String.GetBuffer()[dwSize / sizeof(WCHAR)] = L'\0'; // ensure zero terminated
+    String.ReleaseBuffer();
+    return TRUE;
+}
+
+BOOL CInstalledApplicationInfo::UninstallApplication(BOOL bModify)
+{
+    return StartProcess(bModify ? szModifyPath : szUninstallString, TRUE);
+}
+
+LSTATUS CInstalledApplicationInfo::RemoveFromRegistry()
+{
+    ATL::CStringW szFullName = L"Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\" + szKeyName;
+
+    // TODO: if there are subkeys inside, simply RegDeleteKeyExW will fail
+    // we don't have RegDeleteTree for ReactOS now. (It's a WinVista API)
+    // write a function to delete all subkeys recursively to solve this
+    // or consider letting ReactOS having this API
+
+    return RegDeleteKeyExW(IsUserKey ? HKEY_CURRENT_USER : HKEY_LOCAL_MACHINE, szFullName, WowKey, 0);
+}
+
+BOOL CInstalledApps::Enum(INT EnumType, APPENUMPROC lpEnumProc, PVOID param)
+{
+    FreeCachedEntries();
+
+    HKEY RootKeyEnum[3]  = { HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE, HKEY_LOCAL_MACHINE };
+    REGSAM RegSamEnum[3] = { KEY_WOW64_32KEY,   KEY_WOW64_32KEY,    KEY_WOW64_64KEY    };
+
+    int LoopTime;
+
+    // test if the OS is 64 bit.
+    if (IsSystem64Bit())
+    {
+        // loop for all 3 combination.
+        // note that HKEY_CURRENT_USER\Software don't have a redirect
+        // https://docs.microsoft.com/en-us/windows/win32/winprog64/shared-registry-keys#redirected-shared-and-reflected-keys-under-wow64
+        LoopTime = 3;
+    }
+    else
+    {
+        // loop for 2 combination for KEY_WOW64_32KEY only
+        LoopTime = 2;
+    }
+
+    // loop for all combination
+    for (int i = 0; i < LoopTime; i++)
+    {
+        DWORD dwSize = MAX_PATH;
+        HKEY hKey, hSubKey;
+        LONG ItemIndex = 0;
+        ATL::CStringW szKeyName;
+
+        if (RegOpenKeyExW(RootKeyEnum[i],
+            L"Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall",
+            NULL,
+            KEY_READ | RegSamEnum[i],
+            &hKey) != ERROR_SUCCESS)
         {
-            dwType = REG_DWORD;
-            dwSize = sizeof(DWORD);
+            return FALSE;
+        }
 
-            if (RegQueryValueExW(Info.hSubKey,
-                                 L"SystemComponent",
-                                 NULL,
-                                 &dwType,
-                                 (LPBYTE) &dwValue,
-                                 &dwSize) == ERROR_SUCCESS)
+        while (1)
+        {
+            dwSize = MAX_PATH;
+            if (RegEnumKeyExW(hKey, ItemIndex, szKeyName.GetBuffer(MAX_PATH), &dwSize, NULL, NULL, NULL, NULL) != ERROR_SUCCESS)
             {
-                bIsSystemComponent = (dwValue == 0x1);
-            }
-            else
-            {
-                bIsSystemComponent = FALSE;
+                break;
             }
 
-            dwType = REG_SZ;
-            dwSize = MAX_PATH * sizeof(WCHAR);
-            bIsUpdate = (RegQueryValueExW(Info.hSubKey,
-                                          L"ParentKeyName",
-                                          NULL,
-                                          &dwType,
-                                          (LPBYTE) szParentKeyName.GetBuffer(MAX_PATH),
-                                          &dwSize) == ERROR_SUCCESS);
-            szParentKeyName.ReleaseBuffer();
+            ItemIndex++;
 
-            dwType = REG_SZ;
-            dwSize = MAX_PATH * sizeof(WCHAR);
-            if (RegQueryValueExW(Info.hSubKey,
-                                 L"DisplayName",
-                                 NULL,
-                                 &dwType,
-                                 (LPBYTE) szDisplayName.GetBuffer(MAX_PATH),
-                                 &dwSize) == ERROR_SUCCESS)
+            szKeyName.ReleaseBuffer();
+            if (RegOpenKeyW(hKey, szKeyName.GetString(), &hSubKey) == ERROR_SUCCESS)
             {
-                szDisplayName.ReleaseBuffer();
-                if (EnumType < ENUM_ALL_INSTALLED || EnumType > ENUM_UPDATES)
-                    EnumType = ENUM_ALL_INSTALLED;
+                BOOL bSuccess = FALSE;
+                CInstalledApplicationInfo *Info = new CInstalledApplicationInfo(RootKeyEnum[i] == HKEY_CURRENT_USER, RegSamEnum[i], hSubKey);
+                Info->szKeyName = szKeyName;
 
-                if (!bIsSystemComponent)
+                // check for failure. if failed to init, Info->hSubKey will be set to NULL
+                if (Info->hSubKey)
                 {
-                    if ((EnumType == ENUM_ALL_INSTALLED) || /* All components */
-                        ((EnumType == ENUM_INSTALLED_APPLICATIONS) && (!bIsUpdate)) || /* Applications only */
-                        ((EnumType == ENUM_UPDATES) && (bIsUpdate))) /* Updates only */
+                    // those items without display name are ignored
+                    if (Info->GetApplicationString(L"DisplayName", Info->szDisplayName))
                     {
-                        if (!lpEnumProc(ItemIndex, szDisplayName, &Info, param))
-                            break;
+                        Info->GetApplicationString(L"DisplayVersion", Info->szDisplayVersion);
+                        Info->GetApplicationString(L"Publisher", Info->szPublisher);
+                        Info->GetApplicationString(L"RegOwner", Info->szRegOwner);
+                        Info->GetApplicationString(L"ProductID", Info->szProductID);
+                        Info->GetApplicationString(L"HelpLink", Info->szHelpLink);
+                        Info->GetApplicationString(L"HelpTelephone", Info->szHelpTelephone);
+                        Info->GetApplicationString(L"Readme", Info->szReadme);
+                        Info->GetApplicationString(L"Contact", Info->szContact);
+                        Info->GetApplicationString(L"URLUpdateInfo", Info->szURLUpdateInfo);
+                        Info->GetApplicationString(L"URLInfoAbout", Info->szURLInfoAbout);
+                        Info->GetApplicationString(L"Comments", Info->szComments);
+                        Info->GetApplicationString(L"InstallDate", Info->szInstallDate);
+                        Info->GetApplicationString(L"InstallLocation", Info->szInstallLocation);
+                        Info->GetApplicationString(L"InstallSource", Info->szInstallSource);
+                        Info->GetApplicationString(L"UninstallString", Info->szUninstallString);
+                        Info->GetApplicationString(L"ModifyPath", Info->szModifyPath);
+
+                        bSuccess = TRUE;
                     }
-                    else
+                }
+
+                // close handle
+                if (Info->hSubKey)
+                {
+                    CloseHandle(Info->hSubKey);
+                    Info->hSubKey = NULL;
+                }
+
+                if (bSuccess)
+                {
+                    // add to InfoList.
+                    m_InfoList.AddTail(Info);
+
+                    // invoke callback
+                    if (lpEnumProc)
                     {
-                        RegCloseKey(Info.hSubKey);
+                        if ((EnumType == ENUM_ALL_INSTALLED) || /* All components */
+                            ((EnumType == ENUM_INSTALLED_APPLICATIONS) && (!Info->bIsUpdate)) || /* Applications only */
+                            ((EnumType == ENUM_UPDATES) && (Info->bIsUpdate))) /* Updates only */
+                        {
+                            lpEnumProc(Info, param);
+                        }
                     }
                 }
                 else
                 {
-                    RegCloseKey(Info.hSubKey);
+                    // destory object
+                    delete Info;
                 }
             }
-            else
-            {
-                szDisplayName.ReleaseBuffer();
-                RegCloseKey(Info.hSubKey);
-            }
         }
 
-        dwSize = MAX_PATH;
-        ItemIndex++;
+        szKeyName.ReleaseBuffer();
+        RegCloseKey(hKey);
     }
-
-    Info.szKeyName.ReleaseBuffer();
-    RegCloseKey(hKey);
+    
 
     return TRUE;
 }
+
+VOID CInstalledApps::FreeCachedEntries()
+{
+    POSITION InfoListPosition = m_InfoList.GetHeadPosition();
+
+    /* loop and deallocate all the cached app infos in the list */
+    while (InfoListPosition)
+    {
+        CInstalledApplicationInfo *Info = m_InfoList.GetNext(InfoListPosition);
+        delete Info;
+    }
+
+    m_InfoList.RemoveAll();
+}

base/applications/rapps/misc.cpp

@@ -13,6 +13,9 @@
 
 static HANDLE hLog = NULL;
 
+static BOOL bIsSys64ResultCached = FALSE;
+static BOOL bIsSys64Result = FALSE;
+
 INT GetWindowWidth(HWND hwnd)
 {
     RECT Rect;
@@ -453,3 +456,33 @@ BOOL PathAppendNoDirEscapeW(LPWSTR pszPath, LPCWSTR pszMore)
 
     return TRUE;
 }
+
+
+
+BOOL IsSystem64Bit()
+{
+    if (bIsSys64ResultCached)
+    {
+        // just return cached result
+        return bIsSys64Result;
+    }
+
+    SYSTEM_INFO si;
+    typedef void (WINAPI *LPFN_PGNSI)(LPSYSTEM_INFO);
+    LPFN_PGNSI pGetNativeSystemInfo = (LPFN_PGNSI)GetProcAddress(GetModuleHandle(L"kernel32.dll"), "GetNativeSystemInfo");
+    if (pGetNativeSystemInfo)
+    {
+        pGetNativeSystemInfo(&si);
+        if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64 || si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64)
+        {
+            bIsSys64Result = TRUE;
+        }
+    }
+    else
+    {
+        bIsSys64Result = FALSE;
+    }
+
+    bIsSys64ResultCached = TRUE; // next time calling this function, it will directly return bIsSys64Result
+    return bIsSys64Result;
+}