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authorJohn Ankarström <john@ankarstrom.se>2022-08-03 21:57:27 +0200
committerJohn Ankarström <john@ankarstrom.se>2022-08-03 21:57:27 +0200
commit04daecdd21e86e7556a9462380096530228cd6ca (patch)
treeed2a8134532607687c165c4a13d6f6c020c42d18 /c/win.cpp
parent32bb4696396e48521614d00e5b8f6e6586822f31 (diff)
downloadEpisodeBrowser-04daecdd21e86e7556a9462380096530228cd6ca.tar.gz
Split common.h to util.h, wcharptr.h and win.h.
Diffstat (limited to 'c/win.cpp')
-rw-r--r--c/win.cpp108
1 files changed, 108 insertions, 0 deletions
diff --git a/c/win.cpp b/c/win.cpp
new file mode 100644
index 0000000..435e739
--- /dev/null
+++ b/c/win.cpp
@@ -0,0 +1,108 @@
+#include <utility>
+#include <windows.h>
+
+#include "win.h"
+
+Win32Error::Win32Error() : code(GetLastError()) {}
+Win32Error::Win32Error(const DWORD code) : code(code) {}
+
+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_IGNORE_INSERTS,
+ NULL,
+ code,
+ MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
+ (char*)&m_szMsg,
+ 0, NULL);
+ return m_szMsg;
+}
+
+const wchar_t* Win32Error::What() const noexcept
+{
+ if (!m_wszMsg)
+ FormatMessage(
+ FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
+ NULL,
+ code,
+ MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
+ (wchar_t*)&m_wszMsg,
+ 0, NULL);
+ return m_wszMsg;
+}
+
+std::optional<Library> Library::Maybe(const wchar_t* const lib)
+{
+ HMODULE hModule = LoadLibrary(lib);
+ if (!hModule) return {};
+ return Library(hModule);
+}
+
+Library::Library(const HMODULE hModule) : m_hModule(hModule) {}
+
+Library::Library(const wchar_t* const lib)
+{
+ m_hModule = LoadLibrary(lib);
+ if (!m_hModule)
+ throw Win32Error();
+}
+
+Library::~Library()
+{
+ FreeLibrary(m_hModule);
+}
+
+int EBMessageBox(const wchar_t* const wszText, const wchar_t* const wszCaption, const unsigned uType)
+{
+ extern HWND g_hWnd;
+
+ auto proc = [](const int nCode, const WPARAM wParam, const LPARAM lParam) noexcept
+ -> LRESULT CALLBACK
+ {
+ if (!g_hWnd || nCode < 0 || nCode != HCBT_ACTIVATE)
+ return CallNextHookEx(0, nCode, wParam, lParam);
+
+ HWND hWnd = (HWND)wParam;
+ long lStyle = GetWindowLong(hWnd, GWL_STYLE);
+ if (!(lStyle & WS_POPUP)) return 0;
+
+ RECT rcMain, rcMsg;
+ GetWindowRect(g_hWnd, &rcMain);
+ GetWindowRect(hWnd, &rcMsg);
+ SetWindowPos(hWnd, NULL,
+ 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;
+ };
+
+ HHOOK hHook = require(SetWindowsHookEx(WH_CBT, proc, (HINSTANCE)NULL, GetCurrentThreadId()));
+ int r = MessageBox(g_hWnd, wszText, wszCaption, uType);
+ require(UnhookWindowsHookEx(hHook));
+ return r;
+}
+
+int GetRelativeCursorPos(HWND hWnd, POINT* pt)
+{
+ RECT rc;
+ if (!GetClientRect(hWnd, &rc)) return 0;
+ SetLastError(ERROR_SUCCESS);
+ if (!MapWindowPoints(hWnd, NULL, (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;
+}