WTL-PP.h

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// Various WTL extensions that are not fb2k specific and can be reused in other WTL based software

#define ATLASSERT_SUCCESS(X) {auto RetVal = (X); ATLASSERT( RetVal ); }

class NoRedrawScope {
public:
    NoRedrawScope(HWND p_wnd) throw() : m_wnd(p_wnd) {
        m_wnd.SetRedraw(FALSE);
    }
    ~NoRedrawScope() throw() {
        m_wnd.SetRedraw(TRUE);
    }
private:
    CWindow m_wnd;
};

class NoRedrawScopeEx {
public:
    NoRedrawScopeEx(HWND p_wnd) throw() : m_wnd(p_wnd), m_active() {
        if (m_wnd.IsWindowVisible()) {
            m_active = true;
            m_wnd.SetRedraw(FALSE);
        }
    }
    ~NoRedrawScopeEx() throw() {
        if (m_active) {
            m_wnd.SetRedraw(TRUE);
            m_wnd.RedrawWindow(NULL,NULL,RDW_INVALIDATE|RDW_ERASE|RDW_ALLCHILDREN);
        }
    }
private:
    bool m_active;
    CWindow m_wnd;
};


#define MSG_WM_TIMER_EX(timerId, func) \
    if (uMsg == WM_TIMER && (UINT_PTR)wParam == timerId) \
    { \
        SetMsgHandled(TRUE); \
        func(); \
        lResult = 0; \
        if(IsMsgHandled()) \
            return TRUE; \
    }

#define MESSAGE_HANDLER_SIMPLE(msg, func) \
    if(uMsg == msg) \
    { \
        SetMsgHandled(TRUE); \
        func(); \
        lResult = 0; \
        if(IsMsgHandled()) \
            return TRUE; \
    }

// void OnSysCommandHelp()
#define MSG_WM_SYSCOMMAND_HELP(func) \
    if (uMsg == WM_SYSCOMMAND && wParam == SC_CONTEXTHELP) \
    { \
        SetMsgHandled(TRUE); \
        func(); \
        lResult = 0; \
        if(IsMsgHandled()) \
            return TRUE; \
    }

//BOOL ProcessWindowMessage(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT& lResult, DWORD dwMsgMapID)
#define END_MSG_MAP_HOOK() \
            break; \
        default: \
            return __super::ProcessWindowMessage(hWnd, uMsg, wParam, lParam, lResult, dwMsgMapID); \
        } \
        return FALSE; \
    }


class CImageListContainer : public CImageList {
public:
    CImageListContainer() {}
    ~CImageListContainer() {Destroy();}
private:
    const CImageListContainer & operator=(const CImageListContainer&);
    CImageListContainer(const CImageListContainer&);
};


template<bool managed> class CThemeT {
public:
    CThemeT(HTHEME source = NULL) : m_theme(source) {}

    ~CThemeT() {
        Release();
    }

    HTHEME OpenThemeData(HWND wnd,LPCWSTR classList) {
        Release();
        return m_theme = ::OpenThemeData(wnd, classList);
    }

    void Release() {
        HTHEME releaseme = pfc::replace_null_t(m_theme);
        if (managed && releaseme != NULL) CloseThemeData(releaseme);
    }

    operator HTHEME() const {return m_theme;}
    HTHEME m_theme;
};
typedef CThemeT<false> CThemeHandle;
typedef CThemeT<true> CTheme;


class CCheckBox : public CButton {
public:
    void ToggleCheck(bool state) {SetCheck(state ? BST_CHECKED : BST_UNCHECKED);}
    bool IsChecked() const {return GetCheck() == BST_CHECKED;}

    CCheckBox(HWND hWnd = NULL) : CButton(hWnd) { }
    CCheckBox & operator=(HWND wnd) {m_hWnd = wnd; return *this; }
};


class CEditNoEscSteal : public CContainedWindowT<CEdit>, private CMessageMap {
public:
    CEditNoEscSteal() : CContainedWindowT<CEdit>(this, 0) {}
    BEGIN_MSG_MAP_EX(CEditNoEscSteal)
        MSG_WM_GETDLGCODE(OnEditGetDlgCode)
    END_MSG_MAP()
private:
    UINT OnEditGetDlgCode(LPMSG lpMsg) {
        if (lpMsg == NULL) {
            SetMsgHandled(FALSE); return 0;
        } else {
            switch(lpMsg->message) {
                case WM_KEYDOWN:
                case WM_SYSKEYDOWN:
                    switch(lpMsg->wParam) {
                        case VK_ESCAPE:
                            return 0;
                        default:
                            SetMsgHandled(FALSE); return 0;
                    }
                default:
                    SetMsgHandled(FALSE); return 0;

            }
        }
    }
};

class CEditNoEnterEscSteal : public CContainedWindowT<CEdit>, private CMessageMap {
public:
    CEditNoEnterEscSteal() : CContainedWindowT<CEdit>(this, 0) {}
    BEGIN_MSG_MAP_EX(CEditNoEscSteal)
        MSG_WM_GETDLGCODE(OnEditGetDlgCode)
    END_MSG_MAP()
private:
    UINT OnEditGetDlgCode(LPMSG lpMsg) {
        if (lpMsg == NULL) {
            SetMsgHandled(FALSE); return 0;
        } else {
            switch(lpMsg->message) {
                case WM_KEYDOWN:
                case WM_SYSKEYDOWN:
                    switch(lpMsg->wParam) {
                        case VK_ESCAPE:
                        case VK_RETURN:
                            return 0;
                        default:
                            SetMsgHandled(FALSE); return 0;
                    }
                default:
                    SetMsgHandled(FALSE); return 0;

            }
        }
    }
};



class CWindowClassUnregisterScope {
public:
    CWindowClassUnregisterScope() : name() {}
    const TCHAR * name;
    void Set(const TCHAR * n) {ATLASSERT( name == NULL ); name = n; }
    bool IsActive() const {return name != NULL;}
    void CleanUp() {
        const TCHAR * n = name; name = NULL;
        if (n != NULL) ATLASSERT_SUCCESS( UnregisterClass(n, (HINSTANCE)&__ImageBase) );
    }
    ~CWindowClassUnregisterScope() {CleanUp();}
};


// CWindowRegisteredT
// Minimalistic wrapper for registering own window classes that can be created by class name, included in dialogs and such.
// Usage:
// class myClass : public CWindowRegisteredT<myClass> {...};
// Call myClass::Register() before first use
template<typename TClass, typename TBaseClass = CWindow>
class CWindowRegisteredT : public TBaseClass {
public:
    static UINT GetClassStyle() {
        return CS_VREDRAW | CS_HREDRAW;
    }
    static HCURSOR GetCursor() {
        return ::LoadCursor(NULL, IDC_ARROW);
    }

    BEGIN_MSG_MAP_EX(CWindowRegisteredT)
    END_MSG_MAP()


    static void Register() {
        static CWindowClassUnregisterScope scope;
        if (!scope.IsActive()) {
            WNDCLASS wc = {};
            wc.style = TClass::GetClassStyle();
            wc.cbWndExtra = sizeof(void*);
            wc.lpszClassName = TClass::GetClassName();
            wc.lpfnWndProc = myWindowProc;
            wc.hInstance = (HINSTANCE)&__ImageBase;
            wc.hCursor = TClass::GetCursor();
            ATLASSERT_SUCCESS( RegisterClass(&wc) != 0 );
            scope.Set(wc.lpszClassName);
        }
    }
protected:
    virtual ~CWindowRegisteredT() {}
private:
    static LRESULT CALLBACK myWindowProc(HWND wnd, UINT msg, WPARAM wp, LPARAM lp) {
        TClass * i = NULL;
        if (msg == WM_NCCREATE) {
            i = new TClass;
            i->Attach(wnd);
            ::SetWindowLongPtr(wnd, 0, reinterpret_cast<LONG_PTR>(i));
        } else {
            i = reinterpret_cast<TClass*>( ::GetWindowLongPtr(wnd, 0) );
        }
        LRESULT r;
        if (i == NULL || !i->ProcessWindowMessage(wnd, msg, wp, lp, r)) r = ::DefWindowProc(wnd, msg, wp, lp);
        if (msg == WM_NCDESTROY) {
            ::SetWindowLongPtr(wnd, 0, 0);
            delete i;
        }
        return r;
    }
};




class CSRWlock {
public:
    CSRWlock() : theLock() {
#if _WIN32_WINNT < 0x600
        auto dll = GetModuleHandle(_T("kernel32"));
        Bind(AcquireSRWLockExclusive, dll, "AcquireSRWLockExclusive");
        Bind(AcquireSRWLockShared, dll, "AcquireSRWLockShared");
        Bind(ReleaseSRWLockExclusive, dll, "ReleaseSRWLockExclusive");
        Bind(ReleaseSRWLockShared, dll, "ReleaseSRWLockShared");
#endif
    }
    
    bool HaveAPI() {
#if _WIN32_WINNT < 0x600
        return AcquireSRWLockExclusive != NULL;
#else
        return true;
#endif
    }

    void EnterShared() {
        AcquireSRWLockShared( & theLock );
    }
    void EnterExclusive() {
        AcquireSRWLockExclusive( & theLock );
    }
    void LeaveShared() {
        ReleaseSRWLockShared( & theLock );
    }
    void LeaveExclusive() {
        ReleaseSRWLockExclusive( &theLock );
    }

private:
    CSRWlock(const CSRWlock&);
    void operator=(const CSRWlock&);

    SRWLOCK theLock;
#if _WIN32_WINNT < 0x600
    template<typename func_t> static void Bind(func_t & func, HMODULE dll, const char * name) {
        func = reinterpret_cast<func_t>(GetProcAddress( dll, name ) );
    }

    VOID (WINAPI * AcquireSRWLockExclusive)(PSRWLOCK SRWLock);
    VOID (WINAPI * AcquireSRWLockShared)(PSRWLOCK SRWLock);
    VOID (WINAPI * ReleaseSRWLockExclusive)(PSRWLOCK SRWLock);
    VOID (WINAPI * ReleaseSRWLockShared)(PSRWLOCK SRWLock);
#endif
};

#if _WIN32_WINNT < 0x600
class CSRWorCS {
public:
    CSRWorCS() : cs() {
        if (!srw.HaveAPI()) InitializeCriticalSection(&cs);
    }
    ~CSRWorCS() {
        if (!srw.HaveAPI()) DeleteCriticalSection(& cs );
    }
    void EnterShared() {
        if (srw.HaveAPI()) srw.EnterShared();
        else EnterCriticalSection(&cs);
    }
    void EnterExclusive() {
        if (srw.HaveAPI()) srw.EnterExclusive();
        else EnterCriticalSection(&cs);
    }
    void LeaveShared() {
        if (srw.HaveAPI()) srw.LeaveShared();
        else LeaveCriticalSection(&cs);
    }
    void LeaveExclusive() {
        if (srw.HaveAPI()) srw.LeaveExclusive();
        else LeaveCriticalSection(&cs);
    }
private:
    CSRWorCS(const CSRWorCS&);
    void operator=(const CSRWorCS&);

    CSRWlock srw;
    CRITICAL_SECTION cs;
};
#else
typedef CSRWlock CSRWorCS;
#endif