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// Scintilla source code edit control
/** @file PlatWin.h
** Implementation of platform facilities on Windows.
**/
// Copyright 1998-2011 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#ifndef PLATWIN_H
#define PLATWIN_H
namespace Scintilla {
#ifndef USER_DEFAULT_SCREEN_DPI
#define USER_DEFAULT_SCREEN_DPI 96
#endif
extern void Platform_Initialise(void *hInstance) noexcept;
extern void Platform_Finalise(bool fromDllMain) noexcept;
constexpr RECT RectFromPRectangle(PRectangle prc) noexcept {
RECT rc = { static_cast<LONG>(prc.left), static_cast<LONG>(prc.top),
static_cast<LONG>(prc.right), static_cast<LONG>(prc.bottom) };
return rc;
}
constexpr POINT POINTFromPoint(Point pt) noexcept {
return POINT{ static_cast<LONG>(pt.x), static_cast<LONG>(pt.y) };
}
constexpr Point PointFromPOINT(POINT pt) noexcept {
return Point::FromInts(pt.x, pt.y);
}
constexpr HWND HwndFromWindowID(WindowID wid) noexcept {
return static_cast<HWND>(wid);
}
inline HWND HwndFromWindow(const Window &w) noexcept {
return HwndFromWindowID(w.GetID());
}
void *PointerFromWindow(HWND hWnd) noexcept;
void SetWindowPointer(HWND hWnd, void *ptr) noexcept;
/// Find a function in a DLL and convert to a function pointer.
/// This avoids undefined and conditionally defined behaviour.
template<typename T>
T DLLFunction(HMODULE hModule, LPCSTR lpProcName) noexcept {
if (!hModule) {
return nullptr;
}
FARPROC function = ::GetProcAddress(hModule, lpProcName);
static_assert(sizeof(T) == sizeof(function));
T fp;
memcpy(&fp, &function, sizeof(T));
return fp;
}
// Release an IUnknown* and set to nullptr.
// While IUnknown::Release must be noexcept, it isn't marked as such so produces
// warnings which are avoided by the catch.
template <class T>
void ReleaseUnknown(T *&ppUnknown) noexcept {
if (ppUnknown) {
try {
ppUnknown->Release();
}
catch (...) {
// Never occurs
}
ppUnknown = nullptr;
}
}
UINT DpiForWindow(WindowID wid) noexcept;
int SystemMetricsForDpi(int nIndex, UINT dpi) noexcept;
HCURSOR LoadReverseArrowCursor(UINT dpi) noexcept;
#if defined(USE_D2D)
extern bool LoadD2D();
extern ID2D1Factory *pD2DFactory;
extern IDWriteFactory *pIDWriteFactory;
#endif
}
#endif
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