1 files changed, 130 insertions, 0 deletions
diff --git a/src/libui_sdl/libui/windows/main.cpp b/src/libui_sdl/libui/windows/main.cpp
new file mode 100644
index 0000000..eb6d849
--- /dev/null
+++ b/src/libui_sdl/libui/windows/main.cpp
@@ -0,0 +1,130 @@
+// 6 april 2015
+#include "uipriv_windows.hpp"
+
+static HHOOK filter;
+
+static LRESULT CALLBACK filterProc(int code, WPARAM wParam, LPARAM lParam)
+{
+	MSG *msg = (MSG *) lParam;
+
+	if (code < 0)
+		goto callNext;
+
+	if (areaFilter(msg))		// don't continue to our IsDialogMessage() hack if the area handled it
+		goto discard;
+
+	// TODO IsDialogMessage() hack here
+
+	// otherwise keep going
+	goto callNext;
+
+discard:
+	// we handled it; discard the message so the dialog manager doesn't see it
+	return 1;
+
+callNext:
+	return CallNextHookEx(filter, code, wParam, lParam);
+}
+
+int registerMessageFilter(void)
+{
+	filter = SetWindowsHookExW(WH_MSGFILTER,
+		filterProc,
+		hInstance,
+		GetCurrentThreadId());
+	return filter != NULL;
+}
+
+void unregisterMessageFilter(void)
+{
+	if (UnhookWindowsHookEx(filter) == 0)
+		logLastError(L"error unregistering libui message filter");
+}
+
+// LONGTERM http://blogs.msdn.com/b/oldnewthing/archive/2005/04/08/406509.aspx when adding accelerators, TranslateAccelerators() before IsDialogMessage()
+
+static void processMessage(MSG *msg)
+{
+	HWND correctParent;
+
+	if (msg->hwnd != NULL)
+		correctParent = parentToplevel(msg->hwnd);
+	else		// just to be safe
+		correctParent = GetActiveWindow();
+	if (correctParent != NULL)
+		// this calls our mesage filter above for us
+		if (IsDialogMessage(correctParent, msg) != 0)
+			return;
+	TranslateMessage(msg);
+	DispatchMessageW(msg);
+}
+
+static int waitMessage(MSG *msg)
+{
+	int res;
+
+	res = GetMessageW(msg, NULL, 0, 0);
+	if (res < 0) {
+		logLastError(L"error calling GetMessage()");
+		return 0;		// bail out on error
+	}
+	return res != 0;		// returns false on WM_QUIT
+}
+
+void uiMain(void)
+{
+	while (uiMainStep(1))
+		;
+}
+
+void uiMainSteps(void)
+{
+	// don't need to do anything here
+}
+
+static int peekMessage(MSG *msg)
+{
+	BOOL res;
+
+	res = PeekMessageW(msg, NULL, 0, 0, PM_REMOVE);
+	if (res == 0)
+		return 2;		// no message available
+	if (msg->message != WM_QUIT)
+		return 1;		// a message
+	return 0;			// WM_QUIT
+}
+
+int uiMainStep(int wait)
+{
+	MSG msg;
+
+	if (wait) {
+		if (!waitMessage(&msg))
+			return 0;
+		processMessage(&msg);
+		return 1;
+	}
+
+	// don't wait for a message
+	switch (peekMessage(&msg)) {
+	case 0:		// quit
+		// TODO PostQuitMessage() again?
+		return 0;
+	case 1:		// process a message
+		processMessage(&msg);
+		// fall out to the case for no message
+	}
+	return 1;		// no message
+}
+
+void uiQuit(void)
+{
+	PostQuitMessage(0);
+}
+
+void uiQueueMain(void (*f)(void *data), void *data)
+{
+	if (PostMessageW(utilWindow, msgQueued, (WPARAM) f, (LPARAM) data) == 0)
+		// LONGTERM this is likely not safe to call across threads (allocates memory)
+		logLastError(L"error queueing function to run on main thread");
+}