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[0.4.11] [WIN32K:NTUSER] Find a better position for a menu that is off-screen

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Previously, we would just stick the menu on the edge of the screen.
We should actually try to flip the menu around the point of origin,
and only when that fails move it to the edge of the screen.
CORE-15001
CORE-9037

cherry picked from commit 0.4.12-dev-346-g
d2626f0c2a
This commit is contained in:
Mark Jansen 2019-01-09 22:27:41 +01:00 committed by Joachim Henze
parent ff0886db4b
commit 1d47cfdc1d
1 changed files with 30 additions and 4 deletions
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34
win32ss/user/ntuser/menu.c
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@ -2903,9 +2903,22 @@ static BOOL FASTCALL MENU_ShowPopup(PWND pwndOwner, PMENU menu, UINT id, UINT fl
x -= width - xanchor;
if( x + width > monitor->rcMonitor.right)
x = monitor->rcMonitor.right - width;
{
/* If we would flip around our origin, would we go off screen on the other side? */
if (x - width < monitor->rcMonitor.left)
x = monitor->rcMonitor.right - width;
else
x -= width;
}
}
if( x < monitor->rcMonitor.left )
{
/* If we would flip around our origin, would we go off screen on the other side? */
if (x + width > monitor->rcMonitor.right)
x = monitor->rcMonitor.left;
else
x += width;
}
if( x < monitor->rcMonitor.left ) x = monitor->rcMonitor.left;
if( y + height > monitor->rcMonitor.bottom)
{
@ -2913,9 +2926,22 @@ static BOOL FASTCALL MENU_ShowPopup(PWND pwndOwner, PMENU menu, UINT id, UINT fl
y -= height + yanchor;
if( y + height > monitor->rcMonitor.bottom)
y = monitor->rcMonitor.bottom - height;
{
/* If we would flip around our origin, would we go off screen on the other side? */
if (y - height < monitor->rcMonitor.top)
y = monitor->rcMonitor.bottom - height;
else
y -= height;
}
}
if( y < monitor->rcMonitor.top )
{
/* If we would flip around our origin, would we go off screen on the other side? */
if (y + height > monitor->rcMonitor.bottom)
y = monitor->rcMonitor.top;
else
y += height;
}
if( y < monitor->rcMonitor.top ) y = monitor->rcMonitor.top;
pWnd = ValidateHwndNoErr( menu->hWnd );