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