widget/os2/nsScreenManagerOS2.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "nsScreenManagerOS2.h"
   7 #include "nsScreenOS2.h"
   8
   9
  10 nsScreenManagerOS2 :: nsScreenManagerOS2 ( )
  11 {
  12   // nothing else to do. I guess we could cache a bunch of information
  13   // here, but we want to ask the device at runtime in case anything
  14   // has changed.
  15 }
  16
  17
  18 nsScreenManagerOS2 :: ~nsScreenManagerOS2()
  19 {
  20   // nothing to see here.
  21 }
  22
  23
  24 // addref, release, QI
  25 NS_IMPL_ISUPPORTS1(nsScreenManagerOS2, nsIScreenManager)
  26
  27
  28 //
  29 // CreateNewScreenObject
  30 //
  31 // Utility routine. Creates a new screen object from the given device handle
  32 //
  33 // NOTE: For this "single-monitor" impl, we just always return the cached primary
  34 //        screen. This should change when a multi-monitor impl is done.
  35 //
  36 nsIScreen*
  37 nsScreenManagerOS2 :: CreateNewScreenObject (  )
  38 {
  39   nsIScreen* retval = nullptr;
  40   if ( !mCachedMainScreen )
  41     mCachedMainScreen = new nsScreenOS2 ( );
  42   NS_IF_ADDREF(retval = mCachedMainScreen.get());
  43
  44   return retval;
  45 }
  46
  47
  48 //
  49 // ScreenForRect
  50 //
  51 // Returns the screen that contains the rectangle. If the rect overlaps
  52 // multiple screens, it picks the screen with the greatest area of intersection.
  53 //
  54 // The coordinates are in pixels (not twips) and in screen coordinates.
  55 //
  56 NS_IMETHODIMP
  57 nsScreenManagerOS2 :: ScreenForRect ( int32_t /*inLeft*/, int32_t /*inTop*/, int32_t /*inWidth*/,
  58                                        int32_t /*inHeight*/, nsIScreen **outScreen )
  59 {
  60   GetPrimaryScreen ( outScreen );
  61   return NS_OK;
  62
  63 } // ScreenForRect
  64
  65
  66 //
  67 // GetPrimaryScreen
  68 //
  69 // The screen with the menubar/taskbar. This shouldn't be needed very
  70 // often.
  71 //
  72 NS_IMETHODIMP
  73 nsScreenManagerOS2 :: GetPrimaryScreen(nsIScreen * *aPrimaryScreen)
  74 {
  75   *aPrimaryScreen = CreateNewScreenObject();    // addrefs
  76   return NS_OK;
  77
  78 } // GetPrimaryScreen
  79
  80
  81 //
  82 // GetNumberOfScreens
  83 //
  84 // Returns how many physical screens are available.
  85 //
  86 NS_IMETHODIMP
  87 nsScreenManagerOS2 :: GetNumberOfScreens(uint32_t *aNumberOfScreens)
  88 {
  89   *aNumberOfScreens = 1;
  90   return NS_OK;
  91
  92 } // GetNumberOfScreens
  93
  94 NS_IMETHODIMP
  95 nsScreenManagerOS2::GetSystemDefaultScale(float *aDefaultScale)
  96 {
  97   *aDefaultScale = 1.0f;
  98   return NS_OK;
  99 }
 100
 101 NS_IMETHODIMP
 102 nsScreenManagerOS2 :: ScreenForNativeWidget(void *nativeWidget, nsIScreen **aScreen)
 103 {
 104   *aScreen = CreateNewScreenObject();    // addrefs
 105   return NS_OK;
 106 }