widget/qt/nsScreenManagerQt.cpp@ac0c01689b40 (annotated)
widget/qt/nsScreenManagerQt.cpp
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | #include <QGuiApplication> |
| michael@0 | 6 | #include <QScreen> |
| michael@0 | 7 | |
| michael@0 | 8 | #include "nsScreenManagerQt.h" |
| michael@0 | 9 | #include "nsScreenQt.h" |
| michael@0 | 10 | |
| michael@0 | 11 | nsScreenManagerQt::nsScreenManagerQt() |
| michael@0 | 12 | { |
| michael@0 | 13 | mInitialized = false; |
| michael@0 | 14 | desktop = 0; |
| michael@0 | 15 | screens = 0; |
| michael@0 | 16 | } |
| michael@0 | 17 | |
| michael@0 | 18 | nsScreenManagerQt::~nsScreenManagerQt() |
| michael@0 | 19 | { |
| michael@0 | 20 | delete [] screens; |
| michael@0 | 21 | } |
| michael@0 | 22 | |
| michael@0 | 23 | // addref, release, QI |
| michael@0 | 24 | NS_IMPL_ISUPPORTS(nsScreenManagerQt, nsIScreenManager) |
| michael@0 | 25 | |
| michael@0 | 26 | void nsScreenManagerQt::init() |
| michael@0 | 27 | { |
| michael@0 | 28 | if (mInitialized) |
| michael@0 | 29 | return; |
| michael@0 | 30 | |
| michael@0 | 31 | nScreens = QGuiApplication::screens().size(); |
| michael@0 | 32 | screens = new nsCOMPtr<nsIScreen>[nScreens]; |
| michael@0 | 33 | |
| michael@0 | 34 | for (int i = 0; i < nScreens; ++i) |
| michael@0 | 35 | screens[i] = new nsScreenQt(i); |
| michael@0 | 36 | mInitialized = true; |
| michael@0 | 37 | } |
| michael@0 | 38 | |
| michael@0 | 39 | // |
| michael@0 | 40 | // ScreenForRect |
| michael@0 | 41 | // |
| michael@0 | 42 | // Returns the screen that contains the rectangle. If the rect overlaps |
| michael@0 | 43 | // multiple screens, it picks the screen with the greatest area of intersection. |
| michael@0 | 44 | // |
| michael@0 | 45 | // The coordinates are in pixels (not twips) and in screen coordinates. |
| michael@0 | 46 | // |
| michael@0 | 47 | NS_IMETHODIMP |
| michael@0 | 48 | nsScreenManagerQt::ScreenForRect(int32_t inLeft, int32_t inTop, |
| michael@0 | 49 | int32_t inWidth, int32_t inHeight, |
| michael@0 | 50 | nsIScreen **outScreen) |
| michael@0 | 51 | { |
| michael@0 | 52 | if (!mInitialized) |
| michael@0 | 53 | init(); |
| michael@0 | 54 | |
| michael@0 | 55 | QRect r(inLeft, inTop, inWidth, inHeight); |
| michael@0 | 56 | int best = 0; |
| michael@0 | 57 | int area = 0; |
| michael@0 | 58 | for (int i = 0; i < nScreens; ++i) { |
| michael@0 | 59 | const QRect& rect = QGuiApplication::screens()[i]->geometry(); |
| michael@0 | 60 | QRect intersection = r▭ |
| michael@0 | 61 | int a = intersection.width()*intersection.height(); |
| michael@0 | 62 | if (a > area) { |
| michael@0 | 63 | best = i; |
| michael@0 | 64 | area = a; |
| michael@0 | 65 | } |
| michael@0 | 66 | } |
| michael@0 | 67 | |
| michael@0 | 68 | NS_IF_ADDREF(*outScreen = screens[best]); |
| michael@0 | 69 | return NS_OK; |
| michael@0 | 70 | } |
| michael@0 | 71 | |
| michael@0 | 72 | // |
| michael@0 | 73 | // GetPrimaryScreen |
| michael@0 | 74 | // |
| michael@0 | 75 | // The screen with the menubar/taskbar. This shouldn't be needed very |
| michael@0 | 76 | // often. |
| michael@0 | 77 | // |
| michael@0 | 78 | NS_IMETHODIMP |
| michael@0 | 79 | nsScreenManagerQt::GetPrimaryScreen(nsIScreen **aPrimaryScreen) |
| michael@0 | 80 | { |
| michael@0 | 81 | if (!desktop) |
| michael@0 | 82 | init(); |
| michael@0 | 83 | |
| michael@0 | 84 | NS_IF_ADDREF(*aPrimaryScreen = screens[0]); |
| michael@0 | 85 | return NS_OK; |
| michael@0 | 86 | } |
| michael@0 | 87 | |
| michael@0 | 88 | // |
| michael@0 | 89 | // GetNumberOfScreens |
| michael@0 | 90 | // |
| michael@0 | 91 | // Returns how many physical screens are available. |
| michael@0 | 92 | // |
| michael@0 | 93 | NS_IMETHODIMP |
| michael@0 | 94 | nsScreenManagerQt::GetNumberOfScreens(uint32_t *aNumberOfScreens) |
| michael@0 | 95 | { |
| michael@0 | 96 | if (!desktop) |
| michael@0 | 97 | init(); |
| michael@0 | 98 | |
| michael@0 | 99 | *aNumberOfScreens = nScreens; |
| michael@0 | 100 | return NS_OK; |
| michael@0 | 101 | } |
| michael@0 | 102 | |
| michael@0 | 103 | NS_IMETHODIMP |
| michael@0 | 104 | nsScreenManagerQt::GetSystemDefaultScale(float *aDefaultScale) |
| michael@0 | 105 | { |
| michael@0 | 106 | *aDefaultScale = 1.0f; |
| michael@0 | 107 | return NS_OK; |
| michael@0 | 108 | } |
| michael@0 | 109 | |
| michael@0 | 110 | NS_IMETHODIMP |
| michael@0 | 111 | nsScreenManagerQt::ScreenForNativeWidget(void *aWidget, nsIScreen **outScreen) |
| michael@0 | 112 | { |
| michael@0 | 113 | // I don't know how to go from GtkWindow to nsIScreen, especially |
| michael@0 | 114 | // given xinerama and stuff, so let's just do this |
| michael@0 | 115 | QRect rect(0, 0, 1, 1); |
| michael@0 | 116 | return ScreenForRect(rect.x(), rect.y(), rect.width(), rect.height(), outScreen); |
| michael@0 | 117 | } |
