The Tor Browser: widget/cocoa/nsScreenManagerCocoa.mm@7e26c7da4463

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     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/. */

     6 #include "nsScreenManagerCocoa.h"

     7 #include "nsObjCExceptions.h"

     8 #include "nsCOMPtr.h"

     9 #include "nsCocoaUtils.h"

    11 NS_IMPL_ISUPPORTS(nsScreenManagerCocoa, nsIScreenManager)

    13 nsScreenManagerCocoa::nsScreenManagerCocoa()

    14 {

    15 }

    17 nsScreenManagerCocoa::~nsScreenManagerCocoa()

    18 {

    19 }

    21 nsScreenCocoa*

    22 nsScreenManagerCocoa::ScreenForCocoaScreen(NSScreen *screen)

    23 {

    24     for (uint32_t i = 0; i < mScreenList.Length(); ++i) {

    25         nsScreenCocoa* sc = mScreenList[i];

    26         if (sc->CocoaScreen() == screen) {

    27             // doesn't addref

    28             return sc;

    29         }

    30     }

    32     // didn't find it; create and insert

    33     nsRefPtr<nsScreenCocoa> sc = new nsScreenCocoa(screen);

    34     mScreenList.AppendElement(sc);

    35     return sc.get();

    36 }

    38 NS_IMETHODIMP

    39 nsScreenManagerCocoa::ScreenForRect (int32_t aX, int32_t aY, int32_t aWidth, int32_t aHeight,

    40                                      nsIScreen **outScreen)

    41 {

    42     NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

    44     NSEnumerator *screenEnum = [[NSScreen screens] objectEnumerator];

    45     NSRect inRect = nsCocoaUtils::GeckoRectToCocoaRect(nsIntRect(aX, aY, aWidth, aHeight));

    46     NSScreen *screenWindowIsOn = [NSScreen mainScreen];

    47     float greatestArea = 0;

    49     while (NSScreen *screen = [screenEnum nextObject]) {

    50         NSDictionary *desc = [screen deviceDescription];

    51         if ([desc objectForKey:NSDeviceIsScreen] == nil)

    52             continue;

    54         NSRect r = NSIntersectionRect([screen frame], inRect);

    55         float area = r.size.width * r.size.height;

    56         if (area > greatestArea) {

    57             greatestArea = area;

    58             screenWindowIsOn = screen;

    59         }

    60     }

    62     *outScreen = ScreenForCocoaScreen(screenWindowIsOn);

    63     NS_ADDREF(*outScreen);

    64     return NS_OK;

    66     NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;

    67 }

    69 NS_IMETHODIMP

    70 nsScreenManagerCocoa::GetPrimaryScreen (nsIScreen **outScreen)

    71 {

    72     NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

    74     // the mainScreen is the screen with the "key window" (focus, I assume?)

    75     NSScreen *sc = [[NSScreen screens] objectAtIndex:0];

    77     *outScreen = ScreenForCocoaScreen(sc);

    78     NS_ADDREF(*outScreen);

    80     return NS_OK;

    82     NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;

    83 }

    85 NS_IMETHODIMP

    86 nsScreenManagerCocoa::GetNumberOfScreens (uint32_t *aNumberOfScreens)

    87 {

    88     NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

    90     NSArray *ss = [NSScreen screens];

    92     *aNumberOfScreens = [ss count];

    94     return NS_OK;

    96     NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;

    97 }

    99 NS_IMETHODIMP

   100 nsScreenManagerCocoa::GetSystemDefaultScale(float *aDefaultScale)

   101 {

   102     *aDefaultScale = 1.0f;

   103     return NS_OK;

   104 }

   106 NS_IMETHODIMP

   107 nsScreenManagerCocoa::ScreenForNativeWidget (void *nativeWidget, nsIScreen **outScreen)

   108 {

   109     NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

   111     NSWindow *window = static_cast<NSWindow*>(nativeWidget);

   112     if (window) {

   113         nsIScreen *screen = ScreenForCocoaScreen([window screen]);

   114         *outScreen = screen;

   115         NS_ADDREF(*outScreen);

   116         return NS_OK;

   117     }

   119     *outScreen = nullptr;

   120     return NS_OK;

   122     NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;

   123 }

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