michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include <QGuiApplication>
michael@0: #include <QScreen>
michael@0: 
michael@0: #include "nsScreenManagerQt.h"
michael@0: #include "nsScreenQt.h"
michael@0: 
michael@0: nsScreenManagerQt::nsScreenManagerQt()
michael@0: {
michael@0:     mInitialized = false;
michael@0:     desktop = 0;
michael@0:     screens = 0;
michael@0: }
michael@0: 
michael@0: nsScreenManagerQt::~nsScreenManagerQt()
michael@0: {
michael@0:     delete [] screens;
michael@0: }
michael@0: 
michael@0: // addref, release, QI
michael@0: NS_IMPL_ISUPPORTS(nsScreenManagerQt, nsIScreenManager)
michael@0: 
michael@0: void nsScreenManagerQt::init()
michael@0: {
michael@0:     if (mInitialized)
michael@0:         return;
michael@0: 
michael@0:     nScreens = QGuiApplication::screens().size();
michael@0:     screens = new nsCOMPtr<nsIScreen>[nScreens];
michael@0: 
michael@0:     for (int i = 0; i < nScreens; ++i)
michael@0:         screens[i] = new nsScreenQt(i);
michael@0:     mInitialized = true;
michael@0: }
michael@0: 
michael@0: //
michael@0: // ScreenForRect
michael@0: //
michael@0: // Returns the screen that contains the rectangle. If the rect overlaps
michael@0: // multiple screens, it picks the screen with the greatest area of intersection.
michael@0: //
michael@0: // The coordinates are in pixels (not twips) and in screen coordinates.
michael@0: //
michael@0: NS_IMETHODIMP
michael@0: nsScreenManagerQt::ScreenForRect(int32_t inLeft, int32_t inTop,
michael@0:                                  int32_t inWidth, int32_t inHeight,
michael@0:                                  nsIScreen **outScreen)
michael@0: {
michael@0:     if (!mInitialized)
michael@0:         init();
michael@0: 
michael@0:     QRect r(inLeft, inTop, inWidth, inHeight);
michael@0:     int best = 0;
michael@0:     int area = 0;
michael@0:     for (int i = 0; i < nScreens; ++i) {
michael@0:         const QRect& rect = QGuiApplication::screens()[i]->geometry();
michael@0:         QRect intersection = r&rect;
michael@0:         int a = intersection.width()*intersection.height();
michael@0:         if (a > area) {
michael@0:             best = i;
michael@0:             area = a;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     NS_IF_ADDREF(*outScreen = screens[best]);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: //
michael@0: // GetPrimaryScreen
michael@0: //
michael@0: // The screen with the menubar/taskbar. This shouldn't be needed very
michael@0: // often.
michael@0: //
michael@0: NS_IMETHODIMP
michael@0: nsScreenManagerQt::GetPrimaryScreen(nsIScreen **aPrimaryScreen)
michael@0: {
michael@0:     if (!desktop)
michael@0:         init();
michael@0: 
michael@0:     NS_IF_ADDREF(*aPrimaryScreen = screens[0]);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: //
michael@0: // GetNumberOfScreens
michael@0: //
michael@0: // Returns how many physical screens are available.
michael@0: //
michael@0: NS_IMETHODIMP
michael@0: nsScreenManagerQt::GetNumberOfScreens(uint32_t *aNumberOfScreens)
michael@0: {
michael@0:     if (!desktop)
michael@0:         init();
michael@0: 
michael@0:     *aNumberOfScreens = nScreens;
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsScreenManagerQt::GetSystemDefaultScale(float *aDefaultScale)
michael@0: {
michael@0:     *aDefaultScale = 1.0f;
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsScreenManagerQt::ScreenForNativeWidget(void *aWidget, nsIScreen **outScreen)
michael@0: {
michael@0:     // I don't know how to go from GtkWindow to nsIScreen, especially
michael@0:     // given xinerama and stuff, so let's just do this
michael@0:     QRect rect(0, 0, 1, 1);
michael@0:     return ScreenForRect(rect.x(), rect.y(), rect.width(), rect.height(), outScreen);
michael@0: }