1 files changed, 46 insertions, 3 deletions

diff --git a/indra/llwindow/llwindowwin32.cpp b/indra/llwindow/llwindowwin32.cpp
index ebc3203f14..bc85acbf45 100644
--- a/indra/llwindow/llwindowwin32.cpp
+++ b/indra/llwindow/llwindowwin32.cpp
@@ -872,10 +872,30 @@ BOOL LLWindowWin32::setSizeImpl(const LLCoordScreen size)
 		return FALSE;
 	}
 
+	WINDOWPLACEMENT placement;
+	placement.length = sizeof(WINDOWPLACEMENT);
+
+	if (!GetWindowPlacement(mWindowHandle, &placement)) return FALSE;
+
+	placement.showCmd = SW_RESTORE;
+
+	if (!SetWindowPlacement(mWindowHandle, &placement)) return FALSE;
+
 	moveWindow(position, size);
 	return TRUE;
 }
 
+BOOL LLWindowWin32::setSizeImpl(const LLCoordWindow size)
+{
+	RECT window_rect = {0, 0, size.mX, size.mY };
+	DWORD dw_ex_style = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
+	DWORD dw_style = WS_OVERLAPPEDWINDOW;
+
+	AdjustWindowRectEx(&window_rect, dw_style, FALSE, dw_ex_style);
+
+	return setSizeImpl(LLCoordScreen(window_rect.right - window_rect.left, window_rect.bottom - window_rect.top));
+}
+
 // changing fullscreen resolution
 BOOL LLWindowWin32::switchContext(BOOL fullscreen, const LLCoordScreen &size, BOOL disable_vsync, const LLCoordScreen * const posp)
 {
@@ -886,12 +906,12 @@ BOOL LLWindowWin32::switchContext(BOOL fullscreen, const LLCoordScreen &size, BO
 	DWORD	current_refresh;
 	DWORD	dw_ex_style;
 	DWORD	dw_style;
-	RECT	window_rect;
+	RECT	window_rect = {0, 0, 0, 0};
 	S32 width = size.mX;
 	S32 height = size.mY;
 	BOOL auto_show = FALSE;
 
-	if (mhRC)
+	if (mhRC)	
 	{
 		auto_show = TRUE;
 		resetDisplayResolution();
@@ -986,7 +1006,8 @@ BOOL LLWindowWin32::switchContext(BOOL fullscreen, const LLCoordScreen &size, BO
 			dw_ex_style = WS_EX_APPWINDOW;
 			dw_style = WS_POPUP;
 
-			// Move window borders out not to cover window contents
+			// Move window borders out not to cover window contents.
+			// This converts client rect to window rect, i.e. expands it by the window border size.
 			AdjustWindowRectEx(&window_rect, dw_style, FALSE, dw_ex_style);
 		}
 		// If it failed, we don't want to run fullscreen
@@ -1014,6 +1035,7 @@ BOOL LLWindowWin32::switchContext(BOOL fullscreen, const LLCoordScreen &size, BO
 		dw_style = WS_OVERLAPPEDWINDOW;
 	}
 
+
 	// don't post quit messages when destroying old windows
 	mPostQuit = FALSE;
 
@@ -1798,6 +1820,10 @@ static LLFastTimer::DeclareTimer FTM_MOUSEHANDLER("Handle Mouse");
 
 LRESULT CALLBACK LLWindowWin32::mainWindowProc(HWND h_wnd, UINT u_msg, WPARAM w_param, LPARAM l_param)
 {
+	// Ignore clicks not originated in the client area, i.e. mouse-up events not preceded with a WM_LBUTTONDOWN.
+	// This helps prevent avatar walking after maximizing the window by double-clicking the title bar.
+	static bool sHandleLeftMouseUp = true;
+
 	LLWindowWin32 *window_imp = (LLWindowWin32 *)GetWindowLong(h_wnd, GWL_USERDATA);
 
 
@@ -2144,10 +2170,20 @@ LRESULT CALLBACK LLWindowWin32::mainWindowProc(HWND h_wnd, UINT u_msg, WPARAM w_
 			window_imp->handleUnicodeUTF16((U16)w_param, gKeyboard->currentMask(FALSE));
 			return 0;
 
+		case WM_NCLBUTTONDOWN:
+			{
+				window_imp->mCallbacks->handlePingWatchdog(window_imp, "Main:WM_NCLBUTTONDOWN");
+				// A click in a non-client area, e.g. title bar or window border.
+				sHandleLeftMouseUp = false;
+			}
+			break;
+
 		case WM_LBUTTONDOWN:
 			{
 				window_imp->mCallbacks->handlePingWatchdog(window_imp, "Main:WM_LBUTTONDOWN");
 				LLFastTimer t2(FTM_MOUSEHANDLER);
+				sHandleLeftMouseUp = true;
+
 				if (LLWinImm::isAvailable() && window_imp->mPreeditor)
 				{
 					window_imp->interruptLanguageTextInput();
@@ -2212,6 +2248,13 @@ LRESULT CALLBACK LLWindowWin32::mainWindowProc(HWND h_wnd, UINT u_msg, WPARAM w_
 			{
 				window_imp->mCallbacks->handlePingWatchdog(window_imp, "Main:WM_LBUTTONUP");
 				LLFastTimer t2(FTM_MOUSEHANDLER);
+
+				if (!sHandleLeftMouseUp)
+				{
+					sHandleLeftMouseUp = true;
+					break;
+				}
+
 				//if (gDebugClicks)
 				//{
 				//	LL_INFOS("Window") << "WndProc left button up" << LL_ENDL;