widget/android/ScreenHelperAndroid.cpp

   1 /* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set sw=2 ts=4 expandtab:
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "ScreenHelperAndroid.h"
   8 #include "AndroidRect.h"
   9 #include "nsThreadUtils.h"
  10
  11 #include <mozilla/jni/Refs.h>
  12
  13 #include "AndroidVsync.h"
  14 #include "mozilla/Atomics.h"
  15 #include "mozilla/java/GeckoAppShellWrappers.h"
  16 #include "mozilla/java/ScreenManagerHelperNatives.h"
  17 #include "mozilla/widget/ScreenManager.h"
  18 #include "nsXULAppAPI.h"
  19
  20 using namespace mozilla;
  21 using namespace mozilla::widget;
  22
  23 static ScreenHelperAndroid* gHelper = nullptr;
  24
  25 class ScreenHelperAndroid::ScreenHelperSupport final
  26     : public java::ScreenManagerHelper::Natives<ScreenHelperSupport> {
  27  public:
  28   typedef java::ScreenManagerHelper::Natives<ScreenHelperSupport> Base;
  29
  30   static void RefreshScreenInfo() { gHelper->Refresh(); }
  31 };
  32
  33 static already_AddRefed<Screen> MakePrimaryScreen() {
  34   MOZ_ASSERT(XRE_IsParentProcess());
  35   java::sdk::Rect::LocalRef rect = java::GeckoAppShell::GetScreenSize();
  36   LayoutDeviceIntRect bounds = LayoutDeviceIntRect(
  37       rect->Left(), rect->Top(), rect->Width(), rect->Height());
  38   uint32_t depth = java::GeckoAppShell::GetScreenDepth();
  39   float density = java::GeckoAppShell::GetDensity();
  40   float dpi = java::GeckoAppShell::GetDpi();
  41   auto orientation =
  42       hal::ScreenOrientation(java::GeckoAppShell::GetScreenOrientation());
  43   uint16_t angle = java::GeckoAppShell::GetScreenAngle();
  44   float refreshRate = java::GeckoAppShell::GetScreenRefreshRate();
  45   return MakeAndAddRef<Screen>(bounds, bounds, depth, depth, refreshRate,
  46                                DesktopToLayoutDeviceScale(density),
  47                                CSSToLayoutDeviceScale(1.0f), dpi,
  48                                Screen::IsPseudoDisplay::No, orientation, angle);
  49 }
  50
  51 ScreenHelperAndroid::ScreenHelperAndroid() {
  52   MOZ_ASSERT(!gHelper);
  53   gHelper = this;
  54
  55   ScreenHelperSupport::Base::Init();
  56
  57   Refresh();
  58 }
  59
  60 ScreenHelperAndroid::~ScreenHelperAndroid() { gHelper = nullptr; }
  61
  62 void ScreenHelperAndroid::Refresh() {
  63   AutoTArray<RefPtr<Screen>, 1> screens;
  64   screens.AppendElement(MakePrimaryScreen());
  65   ScreenManager::Refresh(std::move(screens));
  66
  67   if (RefPtr<AndroidVsync> vsync = AndroidVsync::GetInstance()) {
  68     vsync->OnMaybeUpdateRefreshRate();
  69   }
  70 }