Improve Window object.

1 files changed, 0 insertions, 228 deletions

diff --git a/c/win.cpp b/c/win.cpp
deleted file mode 100644
index 40d68e4..0000000
--- a/c/win.cpp
+++ /dev/null
@@ -1,228 +0,0 @@
-#include <utility>
-#include <string>
-#include <string_view>
-#include <windows.h>
-#include <wininet.h>
-
-#include "main.h"
-#include "util.h"
-#include "win.h"
-
-std::wstring WideFromNarrow(const std::string_view src, const int cp)
-{
-	int cchNarrow = src.length()+1;
-	int cchWide = MultiByteToWideChar(cp, 0, src.data(), cchNarrow, nullptr, 0);
-	std::wstring dst(cchWide, 0);
-	if (!MultiByteToWideChar(cp, 0, src.data(), cchNarrow, dst.data(), cchWide))
-		throw Win32Error();
-	return dst;
-}
-
-void WithNextWindow(void (*proc)(HWND))
-{
-	/* WithNextWindow uses a CBT hook to call an arbitrary
-	 * procedure just before the creation of the next window. The
-	 * hook is removed as soon as HCBT_CREATEWND is received.
-	 * Thus, proc is guaranteed to be executed only once. Note
-	 * that static storage must be used, as SetWindowHookEx cannot
-	 * accept a capturing lambda as the hook procedure. */
-
-	static thread_local auto procNext = proc;
-	static thread_local HHOOK hHook = Require(SetWindowsHookExW(WH_CBT, [](const int nCode,
-	    const WPARAM wParam, const LPARAM lParam) -> LRESULT CALLBACK
-	{
-		if (nCode == HCBT_CREATEWND) {
-			Require(UnhookWindowsHookEx(hHook));
-			procNext(reinterpret_cast<HWND>(wParam));
-			return 0;
-		} else
-			return CallNextHookEx(0, nCode, wParam, lParam);
-	}, nullptr, GetCurrentThreadId()));
-}
-
-/* Display next created window in the center of given window. */
-static void CenterNextWindow(HWND hWnd)
-{
-	if (!hWnd)
-		return;
-
-	/* CenterNextWindow employs a trick similar to that above.
-	 * Note, however, that repositioning does not work unless it
-	 * is delayed until the new window is activated. This
-	 * complicates the code somewhat. */
-
-	static thread_local HWND hWndParent;
-	static thread_local HWND hWndNext;
-	static thread_local HHOOK hHook;
-
-	hWndParent = hWnd;
-	hWndNext = nullptr;
-	hHook = Require(SetWindowsHookExW(WH_CBT, [](const int nCode,
-	    const WPARAM wParam, const LPARAM lParam) noexcept -> LRESULT CALLBACK
-	{
-		if (!hWndNext && nCode == HCBT_CREATEWND) {
-			hWndNext = reinterpret_cast<HWND>(wParam);
-			return 0;
-		} else if (nCode == HCBT_ACTIVATE
-		    && reinterpret_cast<HWND>(wParam) == hWndNext) {
-			Require(UnhookWindowsHookEx(hHook));
-
-			long lStyle = GetWindowLongW(hWndNext, GWL_STYLE);
-			if (!(lStyle & WS_POPUP)) return 0;
-
-			RECT rcMain, rcMsg;
-			GetWindowRect(hWndParent, &rcMain);
-			GetWindowRect(hWndNext, &rcMsg);
-			SetWindowPos(hWndNext, nullptr,
-			    rcMain.left+(rcMain.right-rcMain.left)/2-(rcMsg.right-rcMsg.left)/2,
-			    rcMain.top+(rcMain.bottom-rcMain.top)/2-(rcMsg.bottom-rcMsg.top)/2,
-			    -1, -1,
-			    SWP_NOZORDER|SWP_NOSIZE|SWP_NOACTIVATE);
-
-			return 0;
-		} else
-			return CallNextHookEx(0, nCode, wParam, lParam);
-	}, nullptr, GetCurrentThreadId()));
-}
-
-int EBMessageBox(const std::wstring_view text, const std::wstring_view caption, const UINT uType)
-{
-	extern Window* g_window;
-	CenterNextWindow(g_window->hWnd);
-	return MessageBox(g_window->hWnd, text.data(), caption.data(), uType);
-}
-
-void ShowException(const wchar_t* const fmt, const wchar_t* const title, const UINT uType) noexcept
-{
-	try {
-		std::rethrow_exception(std::current_exception());
-	} catch (const WideException& e) {
-		std::wstring msg(wcslen(fmt)+wcslen(e.What()), 0);
-		Swprintf(msg, fmt, e.What());
-		EBMessageBox(msg, title, uType);
-	} catch (const std::exception& e) {
-		std::wstring what = WideFromNarrow(e.what());
-		std::wstring msg(wcslen(fmt)+what.length(), 0);
-		Swprintf(msg, fmt, what.c_str());
-		EBMessageBox(msg, title, uType);
-	} catch (...) {
-		const wchar_t* what = L"an unknown error occurred";
-		std::wstring msg(wcslen(fmt)+wcslen(what), 0);
-		Swprintf(msg, fmt, what);
-		EBMessageBox(msg, title, uType);
-	}
-}
-
-int GetRelativeCursorPos(const HWND hWnd, POINT* const pt) noexcept
-{
-	RECT rc;
-	if (!GetClientRect(hWnd, &rc)) return 0;
-	SetLastError(ERROR_SUCCESS);
-	if (!MapWindowPoints(hWnd, nullptr, (POINT*)&rc, 2)) return 0;
-
-	POINT ptMouse;
-	if (!GetCursorPos(&ptMouse)) return 0;
-	pt->x = ptMouse.x-rc.left;
-	pt->y = ptMouse.y-rc.top;
-	return 1;
-}
-
-Win32Error::Win32Error(const DWORD code, const HMODULE hModule) noexcept
-	: code(code), hModule(hModule) {}
-
-Win32Error::~Win32Error()
-{
-	if (m_szMsg)
-		HeapFree(GetProcessHeap(), 0, m_szMsg);
-	if (m_wszMsg)
-		HeapFree(GetProcessHeap(), 0, m_wszMsg);
-}
-
-const char* Win32Error::what() const noexcept
-{
-	if (!m_szMsg)
-		FormatMessageA(
-		    FORMAT_MESSAGE_ALLOCATE_BUFFER
-		    |FORMAT_MESSAGE_FROM_SYSTEM
-		    |FORMAT_MESSAGE_FROM_HMODULE
-		    |FORMAT_MESSAGE_IGNORE_INSERTS,
-		    hModule,
-		    code,
-		    MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
-		    (char*)&m_szMsg,
-		    0, nullptr);
-	return m_szMsg? m_szMsg: "An unknown error occurred";
-}
-
-const wchar_t* Win32Error::What() const noexcept
-{
-	if (!m_wszMsg)
-		FormatMessageW(
-		    FORMAT_MESSAGE_ALLOCATE_BUFFER
-		    |FORMAT_MESSAGE_FROM_SYSTEM
-		    |FORMAT_MESSAGE_FROM_HMODULE
-		    |FORMAT_MESSAGE_IGNORE_INSERTS,
-		    hModule,
-		    code,
-		    MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
-		    (wchar_t*)&m_wszMsg,
-		    0, nullptr);
-	return m_wszMsg? m_wszMsg: L"An unknown error occurred";
-}
-
-InternetError::InternetError(DWORD codeSystem)
-{
-	if (codeSystem != ERROR_INTERNET_EXTENDED_ERROR)
-		throw Win32Error(codeSystem, GetModuleHandle(L"wininet.dll"));
-
-	DWORD len, cch;
-	InternetGetLastResponseInfo(&code, nullptr, &len);
-
-	cch = len+1;
-	m_szMsg = new char[cch];
-	if (!InternetGetLastResponseInfoA(&code, m_szMsg, &cch))
-		throw Win32Error();
-
-	cch = len+1;
-	m_wszMsg = new wchar_t[cch];
-	if (!InternetGetLastResponseInfoW(&code, m_wszMsg, &len))
-		throw Win32Error();
-}
-
-InternetError::~InternetError()
-{
-	delete m_szMsg;
-	delete m_wszMsg;
-}
-
-const char* InternetError::what() const noexcept
-{
-	return m_szMsg;
-}
-
-const wchar_t* InternetError::What() const noexcept
-{
-	return m_wszMsg;
-}
-
-std::optional<Library> Library::Maybe(const wchar_t* const lib) noexcept
-{
-	HMODULE hModule = LoadLibraryW(lib);
-	if (!hModule) return {};
-	return Library(hModule);
-}
-
-Library::Library(const HMODULE hModule) noexcept
-	: m_hModule(hModule) {}
-
-Library::Library(const wchar_t* const lib)
-{
-	m_hModule = LoadLibraryW(lib);
-	if (!m_hModule)
-		throw Win32Error();
-}
-
-Library::~Library()
-{
-	FreeLibrary(m_hModule);
-}