gecko/widget/os2/nsScreenManagerOS2.cpp
2012-07-30 17:20:58 +03:00

100 lines
2.4 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsScreenManagerOS2.h"
#include "nsScreenOS2.h"
nsScreenManagerOS2 :: nsScreenManagerOS2 ( )
{
// nothing else to do. I guess we could cache a bunch of information
// here, but we want to ask the device at runtime in case anything
// has changed.
}
nsScreenManagerOS2 :: ~nsScreenManagerOS2()
{
// nothing to see here.
}
// addref, release, QI
NS_IMPL_ISUPPORTS1(nsScreenManagerOS2, nsIScreenManager)
//
// CreateNewScreenObject
//
// Utility routine. Creates a new screen object from the given device handle
//
// NOTE: For this "single-monitor" impl, we just always return the cached primary
// screen. This should change when a multi-monitor impl is done.
//
nsIScreen*
nsScreenManagerOS2 :: CreateNewScreenObject ( )
{
nsIScreen* retval = nullptr;
if ( !mCachedMainScreen )
mCachedMainScreen = new nsScreenOS2 ( );
NS_IF_ADDREF(retval = mCachedMainScreen.get());
return retval;
}
//
// ScreenForRect
//
// Returns the screen that contains the rectangle. If the rect overlaps
// multiple screens, it picks the screen with the greatest area of intersection.
//
// The coordinates are in pixels (not twips) and in screen coordinates.
//
NS_IMETHODIMP
nsScreenManagerOS2 :: ScreenForRect ( PRInt32 /*inLeft*/, PRInt32 /*inTop*/, PRInt32 /*inWidth*/,
PRInt32 /*inHeight*/, nsIScreen **outScreen )
{
GetPrimaryScreen ( outScreen );
return NS_OK;
} // ScreenForRect
//
// GetPrimaryScreen
//
// The screen with the menubar/taskbar. This shouldn't be needed very
// often.
//
NS_IMETHODIMP
nsScreenManagerOS2 :: GetPrimaryScreen(nsIScreen * *aPrimaryScreen)
{
*aPrimaryScreen = CreateNewScreenObject(); // addrefs
return NS_OK;
} // GetPrimaryScreen
//
// GetNumberOfScreens
//
// Returns how many physical screens are available.
//
NS_IMETHODIMP
nsScreenManagerOS2 :: GetNumberOfScreens(PRUint32 *aNumberOfScreens)
{
*aNumberOfScreens = 1;
return NS_OK;
} // GetNumberOfScreens
NS_IMETHODIMP
nsScreenManagerOS2 :: ScreenForNativeWidget(void *nativeWidget, nsIScreen **aScreen)
{
*aScreen = CreateNewScreenObject(); // addrefs
return NS_OK;
}