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