Preliminary Windows event work.

2 files changed, 259 insertions, 86 deletions

diff --git a/AUTHORS b/AUTHORS
index 362287b..5625baa 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -7,5 +7,5 @@ Original GLX inspiration, portability fixes:
 Various fixes and improvements:
     Robin Gareus <robin@gareus.org>
 
-UTF-8 work:
+UTF-8 and Windows event work:
     Erik Åldstedt Sund <erikalds@gmail.com>
diff --git a/pugl/pugl_win.cpp b/pugl/pugl_win.cpp
index e3ceef7..4ee47c5 100644
--- a/pugl/pugl_win.cpp
+++ b/pugl/pugl_win.cpp
@@ -24,6 +24,8 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <wctype.h>
 
 #include "pugl/pugl_internal.h"
 
@@ -83,6 +85,9 @@ puglInitInternals()
 void
 puglEnterContext(PuglView* view)
 {
+	PAINTSTRUCT ps;
+	BeginPaint(view->impl->hwnd, &ps);
+
 #ifdef PUGL_HAVE_GL
 	if (view->ctx_type == PUGL_GL) {
 		wglMakeCurrent(view->impl->hdc, view->impl->hglrc);
@@ -99,6 +104,9 @@ puglLeaveContext(PuglView* view, bool flush)
 		SwapBuffers(view->impl->hdc);
 	}
 #endif
+
+	PAINTSTRUCT ps;
+	EndPaint(view->impl->hwnd, &ps);
 }
 
 int
@@ -229,32 +237,6 @@ puglDestroy(PuglView* view)
 	free(view);
 }
 
-static void
-puglReshape(PuglView* view, int width, int height)
-{
-	puglEnterContext(view);
-
-	if (view->reshapeFunc) {
-		view->reshapeFunc(view, width, height);
-	}
-
-	view->width  = width;
-	view->height = height;
-}
-
-static void
-puglDisplay(PuglView* view)
-{
-	puglEnterContext(view);
-
-	if (view->displayFunc) {
-		view->displayFunc(view);
-	}
-
-	puglLeaveContext(view, true);
-	view->redisplay = false;
-}
-
 static PuglKey
 keySymToSpecial(int sym)
 {
@@ -290,117 +272,305 @@ keySymToSpecial(int sym)
 }
 
 static void
-processMouseEvent(PuglView* view, int button, bool press, LPARAM lParam)
+setModifiers(PuglView* view)
 {
-	view->event_timestamp_ms = GetMessageTime();
+	view->mods = 0;
+	view->mods |= (GetKeyState(VK_SHIFT)   < 0) ? PUGL_MOD_SHIFT  : 0;
+	view->mods |= (GetKeyState(VK_CONTROL) < 0) ? PUGL_MOD_CTRL   : 0;
+	view->mods |= (GetKeyState(VK_MENU)    < 0) ? PUGL_MOD_ALT    : 0;
+	view->mods |= (GetKeyState(VK_LWIN)    < 0) ? PUGL_MOD_SUPER  : 0;
+	view->mods |= (GetKeyState(VK_RWIN)    < 0) ? PUGL_MOD_SUPER  : 0;
+}
+
+static unsigned int
+getModifiers()
+{
+	unsigned int mods = 0;
+	mods |= (GetKeyState(VK_SHIFT)   < 0) ? PUGL_MOD_SHIFT  : 0;
+	mods |= (GetKeyState(VK_CONTROL) < 0) ? PUGL_MOD_CTRL   : 0;
+	mods |= (GetKeyState(VK_MENU)    < 0) ? PUGL_MOD_ALT    : 0;
+	mods |= (GetKeyState(VK_LWIN)    < 0) ? PUGL_MOD_SUPER  : 0;
+	mods |= (GetKeyState(VK_RWIN)    < 0) ? PUGL_MOD_SUPER  : 0;
+	return mods;
+}
+
+static void
+initMouseEvent(PuglEvent* event,
+               PuglView*  view,
+               int        button,
+               bool       press,
+               LPARAM     lParam)
+ {
+	POINT pt = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };
+	ClientToScreen(view->impl->hwnd, &pt);
+
 	if (press) {
 		SetCapture(view->impl->hwnd);
 	} else {
 		ReleaseCapture();
 	}
 
-	if (view->mouseFunc) {
-		view->mouseFunc(view, button, press,
-		                GET_X_LPARAM(lParam),
-		                GET_Y_LPARAM(lParam));
+	event->button.time   = GetMessageTime();
+	event->button.type   = press ? PUGL_BUTTON_PRESS : PUGL_BUTTON_RELEASE;
+	event->button.x      = GET_X_LPARAM(lParam);
+	event->button.y      = GET_Y_LPARAM(lParam);
+	event->button.x_root = pt.x;
+	event->button.y_root = pt.y;
+	event->button.state  = getModifiers();
+	event->button.button = button;
+}
+
+static void
+initScrollEvent(PuglEvent* event, PuglView* view, LPARAM lParam, WPARAM wParam)
+{
+	POINT pt = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };
+	ScreenToClient(view->impl->hwnd, &pt);
+
+	event->scroll.time   = GetMessageTime();
+	event->scroll.type   = PUGL_SCROLL;
+	event->scroll.x      = pt.x;
+	event->scroll.y      = pt.y;
+	event->scroll.x_root = GET_X_LPARAM(lParam);
+	event->scroll.y_root = GET_Y_LPARAM(lParam);
+	event->scroll.state  = getModifiers();
+	event->scroll.dx     = 0;
+	event->scroll.dy     = 0;
+}
+
+static unsigned int
+utf16_to_code_point(const wchar_t* input, size_t input_size)
+{
+	unsigned int code_unit = *input;
+	// Equiv. range check between 0xD800 to 0xDBFF inclusive
+	if ((code_unit & 0xFC00) == 0xD800) {
+		if (input_size < 2) {
+			// "Error: is surrogate but input_size too small"
+			return 0xFFFD; // replacement character
+		}
+
+		unsigned int code_unit_2 = *++input;
+		// Equiv. range check between 0xDC00 to 0xDFFF inclusive
+		if ((code_unit_2 & 0xFC00) == 0xDC00) {
+			return (code_unit << 10) + code_unit_2 - 0x35FDC00;
+		}
+
+		// TODO: push_back(code_unit_2);
+		// "Error: Unpaired surrogates."
+		return 0xFFFD; // replacement character
+	}
+	return code_unit;
+}
+
+static void
+initKeyEvent(PuglEvent* event, PuglView* view, bool press, LPARAM lParam)
+{
+	POINT rpos = { 0, 0 };
+	GetCursorPos(&pos);
+
+	POINT cpos = { pt.x, pt.y };
+	ScreenToClient(view->impl->hwnd, &rpos);
+
+	event->key.type      = press ? PUGL_KEY_PRESS : PUGL_KEY_RELEASE;
+	event->key.time      = GetMessageTime();
+	event->key.state     = getModifiers();
+	event->key.x_root    = rpos.x;
+	event->key.y_root    = rpos.y;
+	event->key.x         = cpos.x;
+	event->key.y         = cpos.y;
+	event->key.keycode   = (lParam & 0xFF0000) >> 16;
+	event->key.character = 0;
+	event->key.special   = static_cast<PuglKey>(0);
+	event->key.filter    = 0;
+}
+
+static void
+wcharBufToEvent(wchar_t* buf, int n, PuglEvent* event)
+{
+	if (n > 0) {
+		char* charp = reinterpret_cast<char*>(event->key.utf8);
+		if (!WideCharToMultiByte(CP_UTF8, 0, buf, n,
+		                         charp, 8, NULL, NULL)) {
+			/* error: could not convert to utf-8,
+			   GetLastError has details */
+			memset(event->key.utf8, 0, 8);
+			// replacement character
+			event->key.utf8[0] = 0xEF;
+			event->key.utf8[1] = 0xBF;
+			event->key.utf8[2] = 0xBD;
+		}
+
+		event->key.character = utf16_to_code_point(buf, n);
+	} else {
+		// replacement character
+		event->key.utf8[0]   = 0xEF;
+		event->key.utf8[1]   = 0xBF;
+		event->key.utf8[2]   = 0xBD;
+		event->key.character = 0xFFFD;
 	}
 }
 
 static void
-setModifiers(PuglView* view)
+translateMessageParamsToEvent(LPARAM lParam, WPARAM wParam, PuglEvent* event)
 {
-	view->mods = 0;
-	view->mods |= (GetKeyState(VK_SHIFT)   < 0) ? PUGL_MOD_SHIFT  : 0;
-	view->mods |= (GetKeyState(VK_CONTROL) < 0) ? PUGL_MOD_CTRL   : 0;
-	view->mods |= (GetKeyState(VK_MENU)    < 0) ? PUGL_MOD_ALT    : 0;
-	view->mods |= (GetKeyState(VK_LWIN)    < 0) ? PUGL_MOD_SUPER  : 0;
-	view->mods |= (GetKeyState(VK_RWIN)    < 0) ? PUGL_MOD_SUPER  : 0;
+	/* TODO: This is a kludge.  Would be nice to use ToUnicode here, but this
+	   breaks composed keys because it messes with the keyboard state.  Not
+	   sure how to correctly handle this on Windows. */
+
+	// This is how I really want to do this, but it breaks composed keys (é,
+	// è, ü, ö, and so on) because ToUnicode messes with the keyboard state.
+
+	//wchar_t buf[5];
+	//BYTE keyboard_state[256];
+	//int wcharCount = 0;
+	//GetKeyboardState(keyboard_state);
+	//wcharCount = ToUnicode(wParam, MapVirtualKey(wParam, MAPVK_VK_TO_VSC),
+	//                       keyboard_state, buf, 4, 0);
+	//wcharBufToEvent(buf, wcharCount, event);
+
+	// So, since Google refuses to give me a better solution, and if no one
+	// else has a better solution, I will make a hack...
+	wchar_t buf[5] = { 0, 0, 0, 0, 0 };
+	UINT c = MapVirtualKey(wParam, MAPVK_VK_TO_CHAR);
+	buf[0] = c & 0xffff;
+	// TODO: This does not take caps lock into account
+	// TODO: Dead keys should affect key releases as well
+	if (!(event->key.state && PUGL_MOD_SHIFT))
+		buf[0] = towlower(buf[0]);
+	wcharBufToEvent(buf, 1, event);
+	event->key.filter = ((c >> 31) & 0x1);
+}
+
+static void
+translateCharEventToEvent(WPARAM wParam, PuglEvent* event)
+{
+	wchar_t buf[2];
+	int wcharCount;
+	if (wParam & 0xFFFF0000) {
+		wcharCount = 2;
+		buf[0] = (wParam & 0xFFFF);
+		buf[1] = ((wParam >> 16) & 0xFFFF);
+	} else {
+		wcharCount = 1;
+		buf[0] = (wParam & 0xFFFF);
+	}
+	wcharBufToEvent(buf, wcharCount, event);
+}
+
+static bol
+ignoreKeyEvent(PuglView* view, LPARAM lParam)
+{
+	return view->ignoreKeyRepeat && (lParam & (1 << 30));
 }
 
 static LRESULT
 handleMessage(PuglView* view, UINT message, WPARAM wParam, LPARAM lParam)
 {
-	PAINTSTRUCT ps;
-	PuglKey     key;
+	PuglEvent   event;
+	void*       dummy_ptr = NULL;
 	RECT        rect;
 	MINMAXINFO* mmi;
+	POINT       pt;
+	bool        dispatchThisEvent = true;
+
+	memset(&event, 0, sizeof(event));
+
+	event.any.type       = PUGL_NOTHING;
+	event.any.view       = view;
+	event.any.send_event = InSendMessageEx(dummy_ptr);
 
 	setModifiers(view);
 	switch (message) {
 	case WM_CREATE:
 	case WM_SHOWWINDOW:
 	case WM_SIZE:
-		GetClientRect(view->impl->hwnd, &rect);
-		puglReshape(view, rect.right, rect.bottom);
-		view->width = rect.right;
-		view->height = rect.bottom;
+		GetWindowRect(view->impl->hwnd, &rect);
+		event.configure.type   = PUGL_CONFIGURE;
+		event.configure.x      = rect.left;
+		event.configure.y      = rect.top;
+		view->width            = rect.right - rect.left;
+		view->height           = rect.bottom - rect.top;
+		event.configure.width  = view->width;
+		event.configure.height = view->height;
 		break;
 	case WM_GETMINMAXINFO:
-		mmi = (MINMAXINFO*)lParam;
+		mmi                   = (MINMAXINFO*)lParam;
 		mmi->ptMinTrackSize.x = view->min_width;
 		mmi->ptMinTrackSize.y = view->min_height;
 		break;
 	case WM_PAINT:
-		BeginPaint(view->impl->hwnd, &ps);
-		puglDisplay(view);
-		EndPaint(view->impl->hwnd, &ps);
+		GetUpdateRect(view->impl->hwnd, &rect, false);
+		event.expose.type   = PUGL_EXPOSE;
+		event.expose.x      = rect.left;
+		event.expose.y      = rect.top;
+		event.expose.width  = rect.right - rect.left;
+		event.expose.height = rect.bottom - rect.top;
+		event.expose.count  = 0;
 		break;
 	case WM_MOUSEMOVE:
-		if (view->motionFunc) {
-			view->event_timestamp_ms = GetMessageTime();
-			view->motionFunc(view, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
-		}
+		pt.x = GET_X_LPARAM(lParam);
+		pt.y = GET_Y_LPARAM(lParam);
+		ClientToScreen(view->impl->hwnd, &pt);
+
+		event.motion.type    = PUGL_MOTION_NOTIFY;
+		event.motion.time    = GetMessageTime();
+		event.motion.x       = GET_X_LPARAM(lParam);
+		event.motion.y       = GET_Y_LPARAM(lParam);
+		event.motion.x_root  = pt.x;
+		event.motion.y_root  = pt.y;
+		event.motion.state   = getModifiers();
+		event.motion.is_hint = false;
 		break;
 	case WM_LBUTTONDOWN:
-		processMouseEvent(view, 1, true, lParam);
+		processMouseEvent(&event, view, 1, true, lParam);
 		break;
 	case WM_MBUTTONDOWN:
-		processMouseEvent(view, 2, true, lParam);
+		processMouseEvent(&event, view, 2, true, lParam);
 		break;
 	case WM_RBUTTONDOWN:
-		processMouseEvent(view, 3, true, lParam);
+		processMouseEvent(&event, view, 3, true, lParam);
 		break;
 	case WM_LBUTTONUP:
-		processMouseEvent(view, 1, false, lParam);
+		processMouseEvent(&event, view, 1, false, lParam);
 		break;
 	case WM_MBUTTONUP:
-		processMouseEvent(view, 2, false, lParam);
+		processMouseEvent(&event, view, 2, false, lParam);
 		break;
 	case WM_RBUTTONUP:
-		processMouseEvent(view, 3, false, lParam);
+		processMouseEvent(&event, view, 3, false, lParam);
 		break;
 	case WM_MOUSEWHEEL:
-		if (view->scrollFunc) {
-			POINT pt = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };
-			ScreenToClient(view->impl->hwnd, &pt);
-			view->event_timestamp_ms = GetMessageTime();
-			view->scrollFunc(
-				view, pt.x, pt.y,
-				0.0f, GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA);
-		}
+		initScrollEvent(&event, view, lParam, wParam);
+		event.scroll.dy = GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA;
 		break;
 	case WM_MOUSEHWHEEL:
-		if (view->scrollFunc) {
-			POINT pt = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };
-			ScreenToClient(view->impl->hwnd, &pt);
-			view->event_timestamp_ms = GetMessageTime();
-			view->scrollFunc(
-				view, pt.x, pt.y,
-				GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA, 0.0f);
-		}
+		initScrollEvent(&event, view, lParam, wParam);
+		event.scroll.dx = GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA;
 		break;
 	case WM_KEYDOWN:
-		if (view->ignoreKeyRepeat && (lParam & (1 << 30))) {
-			break;
-		} // else nobreak
-	case WM_KEYUP:
-		view->event_timestamp_ms = GetMessageTime();
-		if ((key = keySymToSpecial(wParam))) {
-			if (view->specialFunc) {
-				view->specialFunc(view, message == WM_KEYDOWN, key);
+		if (!ignoreKeyEvent(view, lParam)) {
+			initKeyEvent(event, view, true, lParam);
+			if (!(event->key.special = keySymToSpecial(wParam))) {
+				event->key.type = PUGL_NOTHING;
 			}
-		} else if (view->keyboardFunc) {
-			view->keyboardFunc(view, message == WM_KEYDOWN, wParam);
+		}
+		break;
+	case WM_CHAR:
+		if (!ignoreKeyEvent(view, lParam)) {
+			initKeyEvent(event, view, true, lParam);
+			translateCharEventToEvent(wParam, event);
+		}
+		break;
+	case WM_DEADCHAR:
+		if (!ignoreKeyEvent(view, lParam)) {
+			initKeyEvent(event, view, true, lParam);
+			translateCharEventToEvent(wParam, event);
+			event->key.filter = 1;
+		}
+		break;
+	case WM_KEYUP:
+		initKeyEvent(event, view, false, lParam);
+		if (!(event->key.special = keySymToSpecial(wParam))) {
+			translateMessageParamsToEvent(lParam, wParam, event);
 		}
 		break;
 	case WM_QUIT:
@@ -415,6 +585,8 @@ handleMessage(PuglView* view, UINT message, WPARAM wParam, LPARAM lParam)
 			view->impl->hwnd, message, wParam, lParam);
 	}
 
+	puglDispatchEvent(view, &event);
+
 	return 0;
 }
 
@@ -436,6 +608,7 @@ puglProcessEvents(PuglView* view)
 {
 	MSG msg;
 	while (PeekMessage(&msg, view->impl->hwnd, 0, 0, PM_REMOVE)) {
+		TranslateMessage(&msg);
 		handleMessage(view, msg.message, msg.wParam, msg.lParam);
 	}